view gcc/ChangeLog.tree-ssa @ 158:494b0b89df80 default tip

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author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Mon, 25 May 2020 18:13:55 +0900
parents 04ced10e8804
children
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2004-05-11  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (delete_tree_cfg): Update call to
	free_basic_block_vars.

2004-05-10  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-live.h: Fix typo in #include guard.

2004-05-08  Jeff Sturm  <jsturm@one-point.com>

	* tree-eh.c (lower_catch): Lower catch body in context of
	catch_region.

2004-05-07  Richard Henderson  <rth@redhat.com>

	* tree-eh.c (tree_could_trap_p): Use get_base_address on references.
	
2004-05-07  Diego Novillo  <dnovillo@redhat.com>

	* doc/invoke.texi: Remove documentation for -ftree-copyprop.
	Update documentation for -ftree-pre.

2004-05-06  Richard Henderson  <rth@redhat.com>

	* stmt.c (parse_output_constraint): Don't warn for read-write
	memory operand.
	* gimplify.c (gimplify_asm_expr): Force in-out memory operands
	to minimal lvalues, then expand to non-matching constraints.

2004-05-06  Zack Weinberg  <zack@codesourcery.com>

	* c-decl.c (finish_function): When !targetm.have_ctors_dtors,
	record static constructors and destructors here...
	(c_expand_body_1): ... not here.
	* c-objc-common.c (start_cdtor, finish_cdtor): Collapse
	together into
	(build_cdtor): ...here.  Update to construct a complete tree
	for the function.  No need to call push_scope, pop_scope, or
	clear_last_expr, or set current_function_cannot_inline.
	(c_objc_common_finish_file): Just call build_cdtor for static
	ctors/dtors, then clear the variables.  Do this before calling
	cgraph_finalize_compilation_unit and cgraph_optimize.

2004-05-06  Richard Henderson  <rth@redhat.com>

	* fold-const.c (fold): Don't build COND_EXPR from comparisons for
	boolean and integer result types.  Handle X ^ X for TRUTH_XOR_EXPR.

2004-05-05  Richard Henderson  <rth@redhat.com>

	* tree-nested.c (create_tmp_var_for): Disallow variable sized types.
	(convert_nonlocal_reference): Set val_only false for the base of a
	component or array reference.
	(convert_local_reference): Likewise.

2004-05-05  Richard Henderson  <rth@redhat.com>

	* gimplify.c (create_tmp_var): Disallow variable sized objects.
	(gimplify_modify_expr): Don't memcpy for VA_ARG_EXPR.

2004-05-05  Richard Henderson  <rth@redhat.com>

	* fold-const.c (operand_equal_p): Replace only_const argument with
	flags.  Allow pure functions if OEP_PURE_SAME.
	(fold, nondestructive_fold_binary_to_constant): Use OEP_ONLY_CONST.
	* tree-cfg.c (phi_alternatives_equal): Fix operand_equal_p flag type.
	* tree-ssa-dom.c (avail_expr_eq): Use OEP_PURE_SAME.
	* tree.h (enum operand_equal_flag): New.
	(operand_equal_p): Update argument list.

2004-05-05  Richard Henderson  <rth@redhat.com>

	* tree-ssa-operands.c (get_call_flags): Remove.
	(get_expr_operands): Use call_expr_flags.
	* tree-alias-common.c (call_may_clobber): Likewise.
	(call_may_return): Likewise.

2004-04-05  Andrew Pinski  <pinskia@physics.uc.edu>

	PR c/15062
	* c-typeck.c (build_asm_expr): Mark the output operands
	to an asm addressable, if necessary.

2004-05-05  Steven Bosscher  <stevenb@suse.de>

	* Makefile.in (GTFILES): Remove duplicate basic-block.h.

2004-05-04  Richard Henderson  <rth@redhat.com>

	* gimplify.c (build_addr_expr_with_type): Set TREE_ADDRESSABLE.
	(gimplify_modify_expr): Turn variable-width assignment into memcpy.
	* tree-nested.c (convert_local_reference): Set val_only after default.

2004-05-04  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (tree_cfg2vcg): Rename from tree_cfg2dot.  Update all
	users.
	Emit flowgraph using VCG syntax.
	* tree-dump.c (dump_files): Rename -fdump-tree-dot to
	-fdump-tree-vcg.
	* tree.h (enum tree_dump_index): Rename TDI_dot to TDI_vcg.
	* doc/invoke.texi: Update documentation to describe
	-fdump-tree-vcg.

2004-05-03  Andrew Pinski  <pinskia@physics.uc.edu>

	* objc/objc-act.c (build_objc_string_object):
	Add the fields to the purpose of the list for
	the constructor.

2004-05-03  Richard Henderson  <rth@redhat.com>

	* c-simplify.c (gimplify_if_stmt): Loop for else-if.

2004-05-03  Andrew Pinski  <pinskia@physics.uc.edu>

	PR optimization/15245
	* tree-ssa-phiopt.c (conditional_replacement): Use fold_convert
	instead of convert.

2004-05-03  Diego Novillo  <dnovillo@redhat.com>

	* gimplify.c (gimplify_compound_lval): Gimplify non-constant
	array indices into a temporary variable.

2004-04-30  Richard Henderson  <rth@redhat.com>

	* builtins.c (validate_arglist): Don't reject side effects.
	(simplify_builtin_strcpy): Do reject side effects in length.

2004-04-30  Jeff Law  <law@redhat.com>

	* tree-outof-ssa.c (eliminate_build): Move code which verifies
	that all of a PHI's arguments do not have a partition if the
	result does not have a partition from here to...
	(rewrite_trees): Here.

2004-04-24  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (factored_computed_goto_label,
	factored_computed_goto): Removed.
	(disband_implicit_edges): Unfactor computed gotos without
	using them.

2004-04-23  Per Bothner  <per@bothner.com>

	* expr.c (expr_wfl_stack):  Remove unused global.

	Pre-patches for future source_location / location_t merge.
	* tree.h (EXPR_LOCATION, EXPR_HAS_LOCATION):  New macros.
	* expr.c (expand_expr_real, expand_expr_real_1):  Use new macros.
	* gimple-low.c (lower_stmt):  Likewise.
	* gimplify.c (annotate_all_with_locus):  Likewise.
	* print-tree.c (print_node):  Likewise.
	* tree-inline.c (expand_call_inline):  Likewise.
	* tree-pretty-print.c (tree-pretty-print.c):  Likewise.
	* tree-sra.c (scalarize_structure_assignment, emit_scalar_copies,
	scalarize_call_expr):  Likewise.
	* tree-ssa-pre.c (code_motion):  Likewise.
	
2004-04-23  Andrew Pinski  <pinskia@physics.uc.edu>

	* c-simplify.c (gimplify_decl_stmt) [TYPE_DECL]:
	Do not check the type.

2004-04-22  Jeff Law  <law@redhat.com>

	* tree-into-ssa.c (rewrite_initialize_block_local_data): Mark all
	arguments as potentially unused.  Do not bother to VARRAY_CLEAR
	the block_defs.  Instead abort if we are presented with a block
	which has a nonempty block_defs.  Wrap entire thing inside
	#ifdef ENABLE_CHECKING.
	* tree-ssa-dom.c (dom_opt_initialize_block_local_data): Similarly

	* tree-ssa-dom.c (redirect_edges_and_update_ssa_graph): Do not mark
	arguments to bypassed PHIs as needing to be rewritten.

2004-04-21  Richard Henderson  <rth@redhat.com>

	PR middle-end/14978
	* tree-nested.c (convert_nonlocal_reference): Set val_only when
	processing any otherwise unhandled expression.

2004-04-21  Jeff Law  <law@redhat.com>

	* tree-ssa-copy.c (cprop_operand): Break out of cprop_into_stmt.
	(cprop_into_stmt): Use cprop_operand.  Rearrange slightly to avoid
	switch statement inside a loop.

	* tree-flow.h (var_ann_d): Add "current_def" field.
	(register_new_def): Lose last argument (currdefs table).
	* tree-into-ssa.c (currdefs): Remove.
	(rewrite_into_ssa): Initialize current_def field on each variable's
	annotation.  Remove initialization/clearing of currdefs.
	(set_value_for, get_value_for): Kill.
	(rewrite_initialize_block): Update call to register_new_def.
	(rewrite_stmt): Similarly.
	(rewrite_finalize_block): Get/set a _DECL node's current
	definition from its annotation.
	(get_reaching_def): Similarly.
	(register_new_def): Similarly.  Lose last argument.
	* tree-ssa-dom.c (currdefs): Remove.
	(get_value_for, set_value_for): Simplify.
	(tree_ssa_dominator_optimize): Initialize current_def on each
	variable's annotation.  Remove initialization/clearing of currdefs.
	(thread_across_edge): Lose unnecessary argument to register_new_def.
	(record_equivalences_from_phis): Likewise.
	(register_definitions_for_stmt): Likewise.
	(restore_currdefs_to_original_value): Get/set a _DECL node's current
	definition from its annotation.  Lose unnecessary "table" argument.
	(dom_opt_finalize_block): Corresponding changes.

	* tree-dfa.c (free_df_for_stmt): Release memory back to the GC
	system immediately.

2004-04-21  Ben Elliston  <bje@au.ibm.com>

	PR middle-end/14730
	* expr.c (expand_expr_real_1) <SWITCH_EXPR>: Discard out of bounds
	case label values and ranges.  Saturate case range values that
	exceed the minimum or maximum permitted value for the controlling
	expression type to TYPE_MIN_VALUE or TYPE_MAX_VALUE.

2004-04-20  Jeff Law  <law@redhat.com>

	* tree-into-ssa.c (register_new_def): Avoid pushing useless
	information onto the block local definition stack.

	* tree-into-ssa.c (register_new_def): If there is no current
	reaching definition for SSA_NAME_VAR (DEF), then just push
	SSA_NAME_VAR (DEF) onto the stack.
	(rewrite_finalize_block): If we pop a _DECL node from the stack,
	then the _DECL node has no current reaching definition.
	* tree-ssa-dom.c (restore_currdefs_to_original_value): Similarly.

2004-04-19  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c: Reinstate all changes from 2004-04-12.
	(lookup_avail_expr): Do not access a hash table object after
	it has been freed.

2004-04-19  Daniel Berlin  <dberlin@dberlin.org>

	* doc/passes.texi: Add blurb about PRE.

2004-04-19  Andrew Pinski  <pinskia@physics.uc.edu>

	* tree-ssa-phiopt.c (conditional_replacement):
	Catch some more non-gimple.

2004-04-19  Jan Hubicka  <jh@suse.cz>

	* predict.c (combine_predictions_for_bb): Fix pasto.

2004-04-18  Jan Hubicka  <jh@suse.cz>

	* tree-inline.c (estimate_num_insn_1): Deal properly with
	builtin_constant_p and builtin_expect.

2004-04-17  Andrew MacLeod  <amacleod@redhat.com>

	* doc/invoke.texi (tree-ter, tree-lrs): Document options.

2004-04-17  Paul Brook  <paul@codesourcery.com>

	* Makefile.in: Set GMPLIBS and GMPINC.
	* configure.ac: Add GMPLIBS and GMPINC.
	* configure: Regenerate.

2004-04-16  Andrew MacLeod  <amacleod@redhat.com>

	* common.opt (ftree-lrs): New common option.
	* flags.h (flag_tree_live_range_split): New flag.
	* opts.c (decode_options): Turn on LRS by default.
	(common_handle_option): Set LRS flag to specified value.
	* toplev.c (flag_tree_live_range_split): Initialize.
	(lang_independent_options f_): Add tree-lrs.
	* tree-outof-ssa.c (rewrite_out_of_ssa): Use LRS flag.
	* tree-ssa-copyrename.c (copy_rename_partition_coalesce): Don't coalesce
	variables if one is a hardware register.  Coalesce inlined user vars.
	(rename_ssa_copies): Scan blocks first, then PHI nodes.

2004-04-15  Andrew Pinski  <pinskia@physics.uc.edu>

	* builtins.c (fold_builtin_isascii): Do not return non-gimple
	code when we are in gimple form.
	(fold_builtin_isdigit): Do not return non-gimple
	code when we are in gimple form.

	* c-simplify.c (gimplify_decl_stmt): Handle TYPE_DECL.

2004-04-14  Paul Brook  <paul@codesourcery.com>

	* Makefile.in (GMPLIBS, GMPINC): Don't set.
	* configure.ac: Remove checks for GMP.
	* configure: Regenerate.

2004-04-13  Diego Novillo  <dnovillo@redhat.com>

	* fold-const.c, tree-ssa-ccp.c, tree-ssa-dom.c,
	tree-ssa.c, tree.c: Replace all uses of TREE_UNSIGNED with
	TYPE_UNSIGNED or DECL_UNSIGNED.

	* c-semantics.c (build_stmt): Don't check type nodes for
	side effects.

2004-04-13  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c: Revert all changes from 2004-04-12.

2004-04-12  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (struct expr_hash_elt): Add new field for hash value.
	(initialize_hash_element): New LHS argument.  Callers changed.
	Initialize the hash value field.
	(remove_local_expressions_from_table): Use htab_remove_elt_with_hash.
	(update_rhs_and_lookup_avail_expr): Similary.
	(lookup_avail_expr): Use htab_find_slot_with_hash.  Simplify slightly
	and pass LHS to initialize_hash_element.
	(record_cond): Also use htab_find_slot_with_hash.  Initialize the
	hash table entry with initialize_hash_element.
	(avail_expr_eq): Use the saved hash value rather than calling into
	the hash functions again.

	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Slightly rearrange
	code to clear tables before each iteration to be clearer.

	* tree-ssa-dom.c (redirect_edges_and_update_ssa_graph): Use
	DEF_OPS and VDEF_OPS instead of STMT_DEF_OPS and STMT_VDEF_OPS.

2004-04-12  Diego Novillo  <dnovillo@redhat.com>

	* flags.h (flag_tree_loop): Remove.  Update all users.
	* opts.c (common_handle_option) <OPT_ftree_loop_optimize>: Remove.
	* toplev.c (f_options): Remove -ftree-loop-optimize.
	* tree-optimize.c (init_tree_optimization_passes): Don't
	schedule pass_loop.
	* tree-ssa-loop.c (tree_ssa_loop_opt): Remove.
	(gate_loop): Remove.
	* doc/invoke.texi: Remove documentation for -ftree-loop-optimize.

2004-04-12  Diego Novillo  <dnovillo@redhat.com>

	* c-lang.c (LANG_HOOKS_RTL_EXPAND_STMT): Remove.
	* c-semantics.c (expand_stmt_toplev): Remove.
	* langhooks-def.h (LANG_HOOKS_RTL_EXPAND_INITIALIZER): Remove.
	(LANG_HOOKS_RTL_EXPAND_START): Remove.
	(LANG_HOOKS_RTL_EXPAND_STMT): Remove.
	(LANG_HOOKS_RTL_EXPAND_END): Remove.
	* langhooks.h (struct lang_hooks_for_rtl_expansion): Remove.
	(struct lang_hooks): Update.
	* tree-optimize.c (tree_rest_of_compilation): Don't call
	lang_hooks.rtl_expand.start nor lang_hooks.rtl_expand.end.
	Call expand_expr_stmt_value instead of
	lang_hooks.rtl_expand.stmt.
	* objc/objc-lang.c (LANG_HOOKS_RTL_EXPAND_STMT): Remove.


2004-04-12  Richard Henderson  <rth@redhat.com>

	* c-common.c (c_do_switch_warnings): Use EXPR_LOCUS instead
	of STMT_LINENO.
	(c_walk_subtrees): Likewise.
	(c_estimate_num_insns_1): Remove FILE_STMT.
	* c-common.def (FILE_STMT): Remove.
	* c-common.h (FILE_STMT_FILENAME_NODE): Remove.
	(FILE_STMT_FILENAME, STMT_LINENO, STMT_LINENO_FOR_FN_P): Remove.
	(c_common_stmt_codes): Remove FILE_STMT.
	* c-dump.c (dump_stmt): Use EXPR_LOCUS instead of STMT_LINENO.
	* c-parse.in (lineno_stmt, lineno_label): Likewise.
	* c-pretty-print.c (pp_c_statement): Remove FILE_STMT.
	* c-semantics.c (add_stmt): Don't emit FILE_STMT.  Do set
	EXPR_LOCUS if not yet set.
	(finish_stmt_tree): Don't set line for end of function.
	(build_stmt): Set EXPR_LOCUS instead of STMT_LINENO.
	(prep_stmt): Use EXPR_LOCUS instead of STMT_LINENO.
	* c-simplify.c (c_gimplify_stmt): Remove FILE_STMT.
	(gimplify_block): Save and restore entire locus.
	(stmt_expr_last_stmt): Use EXPR_LOCUS instead of STMT_LINENO.
	* doc/c-tree.texi (FILE_STMT, FILE_STMT_FILENAME, STMT_LINENO): Remove.

2004-04-12  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (true_exprs, false_exprs): Kill.
	(struct expr_hash_elt): New structure for the expression hash table.
	(struct dom_walk_block_data): Kill block local true_exprs and
	false_exprs.
	(get_eq_expr_value): One less local varray argument.  Fix prototype.
	Use record_cond rather than record_cond_is_{true,false}.
	(true_false_expr_hash, true_false_expr_eq): Kill.
	(record_cond_is_true, record_cond_is_false): Collapse into ...
	(record_cond): New function.
	(tree_ssa_dominator_optimize): Kill references to true_exprs and
	false_exprs.  Use "free" as the free function for the avail_exprs
	hash table.
	(dom_opt_initialize_block_local_data): No longer initialize
	block local true/false expressions.
	(initialize_hash_element): New function.
	(remove_local_expressions_from_table): Use initialize_hash_element.
	(update_rhs_and_lookup_avail_expr): Similarly.
	(dom_opt_finalize_block): Record true/false expressions into the
	main avail_expr hash table.  Unwind main hash table appropriately.
	Use record_cond rather than record_cond_is_{true,false}.
	(record_equivalences_from_incoming_edge): Pass block local avail_exprs
	varray instead of block local true/false varrays to get_eq_expr_value.
	(dump_dominator_optimization_stats): Update to reflect that the
	true/false expression hash tables are gone.
	(lookup_avail_expr): Simplify slightly now that we only have one
	expression hash table.
	(avail_expr_hash, avail_expr_eq): Generalize slightly to handle new
	hash table entry structure and having true/false expression information
	in the available expression hash table.

2004-04-09  Jeff Law  <law@redhat.com>

	* tree-ssa_dom.c (register_definitions_for_stmt): Accept a statement
	annotation rather than the statement itself.  Callers changed.
	Use [V]DEF_OPS rather than STMT_[V]DEF_OPS.
	* tree-ssa-operands.c (get_stmt_operands): Slightly reorganize to
	avoid unnecessary calls to stmt_ann.
	* tree-ssa-pre.c (expr_phi_insertion): Get the statement's annotation
	and use [V]USE_OPS rather than STMT_[V]USE_OPS.
	(same_e_version_phi_result): Similarly
	(process_left_occs_and_kills): Similarly for [V]DEF_OPS and
	STMT_[V]DEF_OPS.
	* tree-ssa.c (replace_immediate_uses): Similarly.
	(verify_ssa): Similarly.  Also verify that VDEF_OPs uses are dominated
	by their sets.

	* tree-into-ssa.c (insert_phi_nodes_for): Use passed in worklist
	varray instead of allocated one for every variable we rewrite into
	SSA form.
	(insert_phi_nodes_1): Pass worklist varray from caller to
	insert_phi_nodes_for.
	(insert_phi_nodes): Allocate a worklist for insert_phi_nodes_for
	and pass it to insert_phi_nodes_1.

2004-04-08  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (nonzero_vars): Turn it into a bitmap.
	(tree_ssa_dominator_optimize): Update initialization, clearing and
	freeing of nonzero_vars.
	(restore_nonzero_vars_to_original_value): New function.
	(dom_opt_finalize_block): Use it.
	(record_var_is_nonzero): Only record the variable into the block
	local nonzero vars array if it did not already have a nonzero property.
	(lookup_avail_expr): Lookup the nonzero property of an SSA_NAME with
	a bitmap test.

	* fold-const.c (fold): Remove attempt to share code which
	simplifies tests against the highest/lowest value of a
	range between the main folder and the nondestructive folder.

2004-04-08  Brian Booth  <bbooth@redhat.com>
	    Diego Novillo  <dnovillo@redhat.com>

	* tree-into-ssa.c (invalidate_name_tags): New function.
	Mark aliases of invalidated name tags for renaming.
	(rewrite_into_ssa): Call invalidate_name_tags.

2004-04-07  Diego Novillo  <dnovillo@redhat.com>

	* gimplify.c (gimplify_call_expr): Remove argument POST_P.
	Update all callers.
	Don't use POST_P when gimplifying the call expression.

2004-04-07  Diego Novillo  <dnovillo@redhat.com>

	* doc/tree-ssa.texi: Add documentation for the dominator
	walker.

2004-04-07  Andrew MacLeod  <amacleod@redhat.com>

	* tree-outof-ssa.c: Update comments and reformat for legibility.
	* tree-ssa-copyrename.c: Update comments and reformat for legibility.
	* tree-ssa-live.c: Update comments and reformat for legibility.
	* tree-ssa-live.h: Update comments and reformat for legibility.

2004-04-07  Diego Novillo  <dnovillo@redhat.com>

	* gimplify.c (gimplify_call_expr): Don't use POST_P when
	gimplifying CALL_EXPR arguments.

2004-04-06  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c: Update comments and reformat for legibility.
	(find_vars_r): Remove special casing of MODIFY_EXPR and
	simplify logic.
	(compute_reached_uses, compute_reaching_defs, remove_decl,
	find_decl_location): Remove.
	(discover_nonconstat_array_refs_r,
	discover_nonconstant_array_refs): Move ...
	* tree-outof-ssa.c: ... here.

2004-04-05  Richard Henderson  <rth@redhat.com>

	* tree-simple.c (is_gimple_min_invariant): Disallow &a+i.
	* tree-ssa-ccp.c (maybe_fold_stmt_addition): Rename from
	maybe_fold_stmt_plus.  Handle MINUS_EXPR.
	(fold_stmt_r): Pass MINUS_EXPR to it.

2004-04-05  Ben Elliston  <bje@au.ibm.com>

	* Makefile.in (OBJS-common): Remove tree-browser.o.
	(cc1): Depend on @TREEBROWSER@ and include in list of objects.
	* configure.ac: Add --enable-tree-browser option.
	* configure: Rebuild.

2004-04-05  Andrew Pinski  <pinskia@physics.uc.edu>

	* tree-ssa-ccp.c (fold_stmt_r): Fix whitespace formatting.
	(set_rhs): Likewise.

2004-04-03  Paolo Bonzini  <bonzini@gnu.org>
	    Diego Novillo  <dnovillo@redhat.com>

	* tree-alias-common.c (find_func_aliases): Support
	assigning to BIT_FIELD_REFs.
	* tree-cfg.c (verify_expr): Don't allow assign to
	a register with BIT_FIELD_REF.
	* tree-dfa.c (get_virtual_var): Add consistency check on
	the shape of expected VARs.
	(discover_nonconstant_array_refs_r): Go through BIT_FIELD_REFs.
	* tree-simple.c: Document that BIT_FIELD_REFs are valid lvalues.
	* tree-ssa.c (set_is_used): Go through BIT_FIELD_REFs.
	* tree-ssa-operands.c (get_expr_operands): Mark VA_ARG_EXPR
	nodes as making volatile references.

2004-04-02  Fariborz Jahanian <fjahanian@apple.com>

	* c-convert.c (convert): Make convert work when converting
	to compatible types across translation unit.

2004-04-02  Andrew Pinski  <pinskia@physics.uc.edu>

	* Makefile.in (stage2_build): Remove support for
	rebuilding libbanshee.
	* configure.ac: Remove support for rebuilding
	libbanshee.
	* config.gcc (powerpc-*-darwin*): Do not rebuild
	libbanshee.

2004-04-01  Kazu Hirata  <kazu@cs.umass.edu>

	* tree-ssa-forwprop.c: Add a comment about forward propagation
	of TRUTH_NOT_EXPR.

2004-04-01  Diego Novillo  <dnovillo@redhat.com>

	* tree-optimize.c (tree_rest_of_compilation): Fix typo in
	setting of in_gimple_form.

2004-04-01  Jeff Law  <law@redhat.com>

	* fold-const.c (fold_relational_hi_lo): Do not return non-gimple
	code when we are in gimple form.
	* tree-optimize.c (tree_rest_of_compilation): Note when we are in
	gimple form.
	* tree-ssa-ccp.c (ccp_fold): Tighten tests on return value from
	nondestructive_fold_{unary,binary}_to_constant.
	* tree.h (in_gimple_form): Declare.

	* tree-ssa.c (ssa_remove_edge): Correct looping structure.
	(ssa_redirect_edge): Similarly

2004-03-30  Brian Booth  <bbooth@redhat.com>

	* tree-pretty-print.c (dump_vops): Add flags argument and
	propagate it to dump_generic_node calls.
	(dump_generic_node): Update dump_vops call.

2004-03-29  Diego Novillo  <dnovillo@redhat.com>

	* configure.ac: Emit confirmation messages for libbanshee.
	* configure: Regenerate.

2004-03-29  Jan Hubicka  <jh@suse.cz>

	PR 14756
	* cgraphunit.c (cgraph_decide_inlining): Rewrite handling of
	always_inline functions.

2004-03-28  Jan Hubicka  <jh@suse.cz>

	* tree-inline.c (expand_call_inline):  Remove fixme introduced by
	nested function patch.

2004-03-26  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-operands.c (get_stmt_operands): Remove always-true
	predicate.

	* tree-ssa-alias.c (maybe_create_global_var): Create
	.GLOBAL_VAR if there are no call-clobbered variables.
	* tree-ssa-operands.c (get_stmt_operands): Add call-clobbering
	VDEFs for asm ("":::"memory") if there are call-clobbered
	variables or if .GLOBAL_VAR has been created.


2004-03-26  Diego Novillo  <dnovillo@redhat.com>

	* passes.c (rest_of_compilation): Re-enable .01.rtl
	dumps.

2004-03-25  Diego Novillo  <dnovillo@redhat.com>

	* tree-pretty-print.c (dump_generic_node) <WITH_RECORD_EXPR>: Remove.
	* tree-inline.c (estimate_num_insns_1) <WITH_RECORD_EXPR>: Remove.
	* fold-const.c (fold_relational_hi_lo): Change type of argument
	'type_p' to const tree and rename it to 'type'.  Update
	all callers.

2004-03-25  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (C_AND_OBJC_OBJS): Remove c-call-graph.o
	(c-call-graph.o): Remove.
	* c-call-graph.c: Remove.
	* c-tree.h (print_call_graph): Remove.
	(debug_call_graph): Remove.
	* tree-cfg.c: Update/add comments everywhere.
	(pre_insert_on_edge): Rename from bsi_insert_on_edge_immediate.
	* tree-flow.h (build_tree_cfg): Make static.
	(tree_cfg2dot): Likewise.
	(verify_stmt): Likewise.
	* tree-ssa-pre.c (insert_one_operand): Call pre_insert_on_edge.

2004-03-25  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-alias.c (struct alias_info): Change type of field
	'num_references' to varray_type.  Update all users.

2004-03-24  Jeff Law  <law@redhat.com>

	* c-mudflap (mflang_flush_calls): Use push_scope/pop_scope instead
	of pushlevel and poplevel.

2004-03-23  Richard Henderson  <rth@redhat.com>

	PR middle-end/14694
	* c-common.c (handle_alias_attribute): Mark aliased variables
	to be TREE_STATIC.

2004-03-23  Jeff Law  <law@redhat.com>

	* tree-into-ssa.c (register_new_def): Lose unnecessary VAR argument,
	instead derive VAR from DEF argument.
	(rewrite_initialize_block, rewrite_stmt, rewrite_operand): Corresponding
	changes.
	* tree-ssa-dom.c (register_definitions_for_stmt): Corresponding changes.
	(record_equivalences_from_phis): Likewise.
	(restore_currdefs_to_original_value): New, extracted from ...
	(dom_opt_finalize_block): Use restore_currdefs_to_original_value.
	Restore currdefs after threading across a true edge.
	(thread_across_edge): Register new defintions when we walk through
	a PHI node or real statement.
	* tree-flow.h (register_new_def): Updated.

2004-03-23  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa-dce.c (find_obviously_necessary_stmts,
	perform_tree_ssa_dce): Do not remove loops.

2004-03-19  Diego Novillo  <dnovillo@redhat.com>

	PR optimization/14643
	* tree-ssa-alias.c (group_aliases_into): Don't add a variable
	to its own may-alias set.
	(create_alias_map_for): New.
	(setup_pointers_and_addressables): Call it.
	Fix allocation of AI->ADDRESSABLE_VARS and AI->POINTERS.
	If there are no addressable variables and more than one
	dereferenced pointers, add type tags to the ADDRESSABLE_VARS
	array.
	(get_tmt_for): Add comment about using alias set equality when
	checking for existing tags.

2004-03-19  Kazu Hirata  <kazu@cs.umass.edu>

	* fold-const.c (fold_relational_const): Remove dead code.

2004-03-19  Dale Johannesen  <dalej@apple.com>

	* tree-ssa-dse.c (dse_optimize_stmt):  Redirect uses feeding into
	a deleted store correctly.

2004-03-19  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Fix typo.
	Eliminate unnecessary test of VAL.

	* tree-dfa.c (find_hidden_use_vars): Also look inside the
	PENDING_SIZES list for hidden uses.
	* tree-optimize.c (tree_rest_of_compilation): Expand used variables
	before setting up parameters.
	* tree-ssa-copyrename.c (rename_ssa_copies): Do nothing for copies
	where the LHS has a hidden use.

2004-03-18  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (TREE_FLOW_H): Reformat.
	(OBJS-common): Add tree-into-ssa.o and tree-outof-ssa.o.
	(tree-ssa.o): Remove dependency on domwalk.h and tree-ssa-live.h
	(tree-into-ssa.o): New.
	(tree-outof-ssa.o): New.
	(GTFILES): Remove tree-ssa.c.
	(gt-tree-ssa.h): Remove.
	* tree-into-ssa.c: New file.
	Move all the functions used to rename into SSA from tree-ssa.c.
	Update/add comments.
	Remove unused variables and structures.
	Don't use GGC for memory allocation.
	* tree-outof-ssa.c: New file.
	Move all the functions used to rename out of SSA from
	tree-ssa.c.
	Update/add comments.
	* tree-ssa-alias.c (compute_points_to_and_addr_escape): Add
	bibliographic reference.

2004-03-18  Jeff Law  <law@redhat.com>

	* Makefile.in (tree-tailcall.o): Depend on langhooks.h.
	* tree-tailcall.c: Include langhooks.h.
	(find_tail_calls): Use types_compatible_p langhook instead of
	equality test of TYPE_MAIN_VARIANT.

	* tree-nested.c (get_chain_decl): Mark the chain decl with
	TREE_NO_WARNING.

2004-03-18  Devang Patel  <dpatel@apple.com>

	* tree-ssa-live.c (new_tree_live_info): Set num_blocks to
	last_basic_block instead of n_basic_blocks.
	(calculate_live_on_entry): Use last_basic_block instead of
	n_basic_blocks.
	(calculate_live_on_exit): Same.

2004-03-17  Jeff Law  <law@redhat.com>

	* tree-tailcall.c (find_tail_calls): Tighten test for tail recursion.

2004-03-17  Diego Novillo  <dnovillo@redhat.com>

	PR optimization/14511
	* tree-ssa-alias.c (compute_flow_insensitive_aliasing): Do not
	ignore read-only variables.
	(may_alias_p): Fix pointer-to-var calculation when 'var' is an
	array.

2004-03-17  Jan Hubicka  <jh@suse.cz>

	* tree-ssa.c (rewrite_into_ssa, compute_global_livein): Fix.

2004-03-17  Paolo Bonzini  <bonzini@gnu.org>

	* builtins.c (expand_builtin_constant_p,
	purge_builtin_constant_p): Remove.
	(expand_builtin): Expand __builtin_constant_p to zero.
	* function.c (struct function): Remove calls_constant_p.
	(current_function_calls_constant_p): Remove.
	* passes.c (rest_of_handle_gcse): Do not run
	purge_builtin_constant_p.
	* rtl.def (CONSTANT_P_RTX): Die die die.

	* cse.c (fold_rtx): Do not handle CONSTANT_P_RTX.
	* expr.c (emit_move_insn): Likewise.
	* gcse.c (want_to_gcse_p, gcse_constant_p): Likewise.
	* genrecog.c (validate_pattern): Likewise.
	* recog.c (immediate_operand): Likewise.
	* rtl.h (CONSTANT_P): Likewise.
	* simplify-rtx.c (simplify_rtx): Likewise.
	* config/alpha/alpha.c (input_operand): Likewise.
	* config/arm/arm.c (THUMB_LEGITIMATE_CONSTANT_P): Likewise.
	* config/c4x/c4x.c (const_operand): Likewise.
	* config/cris/cris.c (cris_gotless_symbol,
	cris_got_symbol): Likewise.
	* config/frv/frv.h (LEGITIMATE_PIC_OPERAND_P): Likewise.
	* config/ia64/ia64.c (gr_reg_or_5bit_operand,
	gr_reg_or_6bit_operand, gr_reg_or_8bit_operand,
	gr_reg_or_8bit_adjusted_operand,
	gr_reg_or_8bit_and_adjusted_operand,
	gr_reg_or_14bit_operand, gr_reg_or_22bit_operand,
	shift_count_operand, shift_32bit_count_operand): Likewise.
	* config/m32r/m32r.c (move_src_operand): Likewise.
	* config/mips/mips.c (mips_const_insns): Likewise.
	* config/mmix/mmix.c (mmix_constant_address_p): Likewise.
	* config/pa/pa.c (move_src_operand): Likewise.
	* config/rs6000/rs6000.c (input_operand): Likewise.
	* config/sparc/sparc.c (input_operand): Likewise.
	* config/v850/v850.c (movsi_source_operand): Likewise.
	* config/xtensa/xtensa.c (move_operand,
	xtensa_emit_move_sequence): Likewise.
	* config/ia64/ia64.h (PREDICATE_CODES): Do not mention CONSTANT_P_RTX.
	* config/pa/pa.h (PREDICATE_CODES): Likewise.

2004-03-16  Diego Novillo  <dnovillo@redhat.com>

	* tree-dump.c (struct dump_option_value_info): Add TDF_UID.
	* tree.h (TDF_UID): Define.
	* doc/invoke.texi: Document -ftree-dump-...-uid.
	* tree-pretty-print.c (debug_generic_expr): Add TDF_UID.
	(debug_generic_stmt): Likewise.
	(dump_decl_name): New function.
	(dump_generic_node): Call it.
	(print_declaration): Add new argument 'flags'.  Update all users.
	(print_struct_decl): Likewise.
	* tree-alias-ander.c, tree-cfg.c, tree-dfa.c, tree-mudflap.c,
	tree-nrv.c, tree-sra.c, tree-ssa-alias.c, tree-ssa-ccp.c,
	tree-ssa-copy.c, tree-ssa-dom.c, tree-ssa-dse.c,
	tree-ssa-forwprop.c, tree-ssa-operands.c, tree-ssa-pre.c,
	tree-ssa.c, tree-tail-call.c: Call print_generic_* with
	'dump_flags'.

2004-03-16  Dale Johannesen  <dalej@apple.com>

	* Makefile.in (tree-ssa-phiopt.o): add langhooks.h dependency.
	(tree-nrv.o): Ditto.
	(tree-ssa-copy.o): Ditto.
	(tree-ssa-dom.o): Ditto.
	(tree-ssa-ccp.o): Ditto.
	* c-common.c: Add #include hashtab.h.
	(c_type_hash): New.
	(c_common_get_alias_set): Handle multiple type nodes referring
	to "the same" type, currently for C90 only.
	* c-decl.c (current_file_decl): Move to toplev.c.
	* c-lang.c (LANG_HOOKS_TYPES_COMPATIBLE_P): Define to
	c_types_compatible_p.
	(c_types_compatible_p): New.
	* c-tree.h (c_types_compatible_p): New declaration.
	* c-typeck.c (tagged_types_tu_compatible_p): Allow for
	compiler-generated TYPE_DECLs without a DECL_ORIGINAL_TYPE.
	* gimplify.c (canonicalize_addr_expr): Use types_compatible_p langhook.
	(cpt_same_type): Ditto.
	* langhooks-def.h (lhd_types_compatible_p): New declaration.
	LANG_HOOKS_TYPES_COMPATIBLE_P: New.
	* langhooks.c (lhd_types_compatible_p): New.
	* langhooks.h (struct lang_hooks): Add types_compatible_p.
	* stmt.c (tail_recursion_args): Use types_compatible_p langhook.
	* toplev.c (current_file_decl): New, moved from c-decl.c.
	* tree-nrv.c: Include langhooks.h.
	(tree_nrv): Use types_compatible_p langhook.
	* tree-ssa-ccp.c: Include langhooks.h.
	(maybe_fold_offset_to_array_ref): Use types_compatible_p langhook.
	(maybe_fold_offset_to_component_ref): Ditto (2 places).
	(fold_stmt_r): Make sure rhs of COMPONENT_REF is in lhs type.
	* tree-ssa-copy.c: Include langhooks.h.
	(cprop_into_stmt): Use types_compatible_p langhook.
	* tree-ssa-dom.c: Include langhooks.h.
	(avail_expr_p): Use types_compatible_p langhook.
	* tree-ssa-phiopt.c: Include langhooks.h.
	(conditional_replacement): Use types_compatible_p langhook.
	* tree-ssa.c (tree_ssa_useless_type_conversion_1): Use
	types_compatible_p langhook.
	* tree.h (current_file_decl): New declaration.

2004-03-16  Dale Johannesen  <dalej@apple.com>

	PR optimization/14498
	* gimplify.c (copy_if_shared_r): Mark VA_ARGS_EXPRs as volatile.
	(mark_decls_volatile_r): Moved higher in file (unchanged).

2004-03-16  Daniel Berlin  <dberlin@dberlin.org>

	PR optimization/14562
	* tree-ssa-pre.c (generate_expr_as_of_bb): Don't use names_match_p.
	(generate_vops_as_of_bb): Ditto.

2004-03-12  Diego Novillo  <dnovillo@redhat.com>

	PR optimization/14553
	* tree-ssa.c (replace_immediate_uses): Call propagate_value to
	update operands.

2004-03-12  Diego Novillo  <dnovillo@redhat.com>

	* tree-alias-common.c (create_alias_vars): Add #if
	HAVE_BANSHEE around test for PTA_ANDERSEN.

2004-03-11  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (struct walk_state): Remove fields 'is_store' and
	'is_indirect_ref'.  Update all users.
	* tree-flow.h (struct var_ann_d): Remove fields 'is_stored',
	'is_dereferenced_store' and 'is_dereferenced_load'.  Update
	all users.
	* tree-simple.c (get_base_address): Handle BIT_FIELD_REF.
	* tree-ssa-alias.c (struct alias_info): Add fields
	'written_vars', 'dereferenced_ptrs_store' and
	'dereferenced_ptrs_load'.
	(init_alias_info): Initialize them.
	(delete_alias_info): Free them.
	(find_ptr_dereference): New.
	(ptr_is_dereferenced_by): Call it.
	Add new argument 'is_store'.  Set to true if the
	expression is an indirect store operation.
	(compute_points_to_and_addr_escape): If the statement
	makes a store, load or write operation, update the
	corresponding bitmap.
	(compute_flow_insensitive_aliasing): Test the
	'written_vars' bitmap to determine if alias sets should
	be computed.
	(setup_pointers_and_addressables): Always assume that
	volatile pointers and hidden pointers have been used in a
	memory store operation.
	* tree-ssa-operands.c (add_stmt_operand): Do add an
	operand for may-aliased variables before computing
	aliases.

2004-03-11  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-optimize.c (init_tree_optimization_passes): Move
	pass_tail_recursion and pass_ch after pass_may_alias.
	* tree-ssa-loop.c (mark_defs_for_rewrite): Mark type tags
	for rewriting.
	* tree-ssa.c (mark_def_sites): Process the operand of a
	VDEF before the result.

2004-03-11  Richard Henderson  <rth@redhat.com>

	PR 14204
	* tree-ssa.c (warn_uninit): Don't warn for hard register variables.

2004-03-10  Richard Henderson  <rth@redhat.com>

	* tree-simple.c (get_base_var, get_base_decl): Remove.
	* tree-simple.h: Likewise.
	* tree-dfa.c (discover_nonconstant_array_refs_r): Use get_base_address.
	* tree-ssa-alias.c (ptr_is_dereferenced_by): Likewise.
	(add_pointed_to_var, is_escape_site): Likewise.
	* tree-ssa-ccp.c (get_default_value): Expect only SSA_NAME and DECLs.
	* tree-ssa-operands.c (add_stmt_operand): Likewise.
	(note_addressable): Use get_base_address.
	* tree-ssa-dce.c (need_to_preserve_store): Expect only SSA_NAME.
	* tree-ssa.c (set_is_used): Inline get_base_decl.

2004-03-10  Richard Henderson  <rth@redhat.com>

	* tree-nested.c (convert_nonlocal_reference): Clear TREE_INVARIANT
	on modified ADDR_EXPRs.

2004-03-10  Andrew Pinski  <apinski@apple.com

	PR c/14475
	* c-decl.c (check_bitfield_type_and_width): Check for null
	lang_type_specific when check the precision of an enum.

2004-03-09  Andrew Pinski  <apinski@apple.com>

	* Makefile.in (tree-ssa-forwprop.o): Fix the dependences.

2004-03-09  Jeff Law  <law@redhat.com>

	* tree-flow-inline.h (may_propagate_copy): Do not allow propagation of
	a constant for a virtual operand.

2004-03-08  Richard Henderson <rth@redhat.com>

	* calls.c (initialize_argument_information): Add
	parameter may_tail_call.  Set to false for invisible
	pass-by-reference arguments that require stack
	allocation.
	Update all users.

2004-03-07  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c: (get_eq_expr_value): Fix typo when comparing a
	boolean against a constant.
	* tree-ssa-forwprop.c (record_single_argument_cond_exprs): Do not
	record the same SSA_NAME more than once.  Only record the SSA_NAME
	tested, not the COND_EXPR.
	(substitute_single_use_vars): Substitute booleans which are
	set from a TRUTH_NOT_EXPR even if they have more than one use site.

2004-03-05  Jeff Law  <law@redhat.com>

	* tree-ssa-dce.c (remove_dead_stmt): Clear PENDING_STMT after
	redirect_edge_and_branch call.

	* tree-ssa-forwprop.c (record_single_argument_cond_exprs): Also
	record COND_EXPRs with single use vars defined by SSA_NAME + CONST
	expressions.
	(substitute_single_use_vars): Corresponding changes to rewrite
	COND_EXPRs using single use vars defined by SSA_NAME + CONST
	expressions.

2004-03-05  Ulrich Weigand  <uweigand@de.ibm.com>

	* config/s390/s390.c (s390_expand_movstr): Do not use
	expand_exit_loop_top_cond, manually copy loop header.
	(s390_expand_clrstr): Likewise.
	(s390_expand_cmpmem): Likewise.

2004-03-04  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-alias.c (compute_flow_sensitive_aliasing): If
	a name tag has been marked call-clobbered, also mark the
	corresponding type tag.

2004-03-04  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa-loop-live.c (coalesce_tpa_members): Update the root
	variable of the partition.

2004-03-04  Jeff Law  <law@redhat.com>

	* tree-ssa-dce.c (remove_dead_stmt): Redirect an existing edge
	rather than deleting the old ones and creating a new one when
	removing a dead conditional.

	* fold-const.c (fold): When rebuilding the expression after a
	call to fold_relational_hi_lo, make sure to convert the type of
	the second argument to the type of the first.

2004-03-04  Diego Novillo  <dnovillo@redhat.com>

	* cgraphunit.c (cgraph_optimize): Do not do memory release
	check if there have been errors.

2004-03-03  Jeff Law  <law@redhat.com>

	* tree-ssa-phiopt.c (conditional_replacement): Clear EDGE_TRUE_VALUE
	and EDGE_FALSE_VALUE on the remaining edge after eliminating a PHI.

2004-03-03  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-copyrename.c (gate_copyrename): Really check it in.
	* tree-ssa.c (create_temp): Use DECL_ARTIFICIAL from original decl.

2004-03-02  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-tailcall.c (struct tailcall): Remove return_block and return_bsi
	fields, add m and a fields.
	(m_acc, a_acc): New.
	(find_tail_calls): Find tail calls on whose results simple operations
	are performed.
	(independent_on_stmt_p, process_assignment,
	propagate_through_phis, adjust_accumulator_values,
	adjust_return_value): New.
	(eliminate_tail_call): Update the accumulators if needed.
	(optimize_tail_call): Do not create phis.
	(tree_optimize_tail_calls): Create phis and accumulators as needed.
	Adjust return values.

2004-03-02  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-operands.c (get_expr_operands): Mark CALL_EXPRs
	with has_volatile_ops if aliases haven't been computed yet.
	(add_stmt_operand): Use 'true' instead of '1'.

2004-03-02  Diego Novillo  <dnovillo@redhat.com>

	PR optimization/14266
	* tree-ssa-alias.c (create_global_var): Mark GLOBAL_VAR for
	renaming.

2004-03-01  Richard Henderson  <rth@redhat.com>

	* tree.c (associative_tree_code): Remove MINUS_EXPR, LSHIFT_EXPR,
	RSHIFT_EXPR.
	* tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Use
	is_gimple_min_invariant and is_gimple_var.  Handle minus_expr
	specially.

2004-03-01  Richard Henderson  <rth@redhat.com>

	* cfgbuild.c (rtl_make_eh_edge): Rename from make_eh_edge.
	* basic-block.h, except.c: Update decl and uses.

2004-03-01  Frank Ch. Eigler  <fche@redhat.com>

	* doc/passes.texi: Add information about mudflap.

2004-03-01  Andrew Pinski  <pinskia@physics.uc.edu>

	PR middle-end/13066
	* fold-const (fold): Call fold_convert when building
	a TRUTH_*_EXPR tree.

2004-03-01  Andrew MacLeod  <amacleod@redhat.com>

	* common.opt : Add tree-copyrename option. Remove duplicate tree-sra.
	* flags.h (flag_tree_copyrename): Declare.
	* opts.c (decode_options): Turn copyrename on by default at -O.
	(common_handle_option): Handle -ftree-copyrename.
	* toplev.c (flag_tree_copyrename): Declare.
	* tree-ssa-copyrename.c (gate_copyrename): New.  Check flag.
	(pass_rename_ssa_copies): Initialize with gated routine.
	(lang_independent_options f_): Add tree-copyrename.
	* doc/invoke.texi: Add -fdump-tree-copyrename and  -ftree-copyrename.
	* doc/passes.texi: Add blurb for copy renaming.

2004-03-01  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (true_false_expr_hash): Update comments slightly.
	(true_false_expr_eq): Update comments slightly.  Avoid using
	operand_equal_p, instead check the code and operands directly.

2004-03-01  Andrew MacLeod  <amacleod@redhat.com>

	* Makefile.in (tree-ssa-copyrename.o): New object.
	* timevar.def (TV_TREE_COPY_RENAME): New time variable.
	* tree-optimize.c (init_tree_optimization_passes): Add copy rename
	pass.
	* tree-pass.h (pass_rename_ssa_copies): New pass structure.
	* tree-sra.c (lookup_scalar): Copy DECL_ARITIFICIAL flag from base.
	* tree-ssa-copyrename.c : New file.
	(copy_rename_partition_coalesce): Coalesce partitions for renaming.
	(rename_ssa_copies): Find renamable copies.
	(pass_rename_ssa_copies): Initialize.
	* tree-ssa-live.c (register_ssa_partition): Move to tree-ssa-live.h.
	* tree-ssa-live.h (register_ssa_partition): Moved from tree-ssa-live.c.

2004-02-29  David Edelsohn  <edelsohn@gnu.org>

	* doloop.c (doloop_optimize): Increment n_iterations if loop->top
	present.

2004-02-29  Diego Novillo  <dnovillo@redhat.com>

	* gimple-low.c (pass_remove_useless_vars): Add TODO_dump_func.

2004-02-27  Richard Henderson  <rth@redhat.com>

	PR middle-end/14310
	* explow.c (emit_stack_save): Remove savearea mode check.

2004-02-27  Richard Henderson  <rth@redhat.com>

	* builtins.c (simplify_builtin_strcmp): Don't export.  Remove
	length parameters.  Remove conversion to memcmp.
	(simplify_builtin_strncmp): Likewise.
	* expr.h: Don't declare them.
	* tree-ssa-ccp.c (ccp_fold_builtin): Don't call them.

2004-02-27  Dale Johannesen  <dalej@apple.com>

	* tree-cfg.c (cleanup_control_expr_graph): Prevent edge
	probability from overflowing due to roundoff errors.

2004-02-27  Jeff Law  <law@redhat.com>

	* tree-cfg.c (verify_expr): Do not walk down into types.
	Expand checking to verify that unary/binary operators have
	gimple operands.
	* tree-ssa-ccp.c (ccp_fold_builtin, case BUILT_IN_STRLEN): Do not
	create non-gimple code.  Similarly for BUILTIN_IN_STRCPY and
	BUILT_IN_STRNCPY.
	* tree-ssa-phiopt.c (conditional_replacement): Do not create
	non-gimple code.
	* tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Likewise.

	* tree-simple.c (is_gimple_min_invariant): Subtraction of a
	constant from a constant pointer is a gimple invariant as well.
	* tree-ssa-operands.c (get_expr_operands): Handle subtraction
	of a constant from a constant pointer too.

	* fold-const.c (fold): Tighten test for optimizing an equality
	comparison of the address of two variables.

	* tree-inline.c (setup_one_parameter): Improve test for when we
	need to gimplify the initialization statements.

2004-02-27  Diego Novillo  <dnovillo@redhat.com>

	PR optimization/14312
	* tree-pretty-print.c (dump_generic_node): Mark tail calls.
	* tree-ssa-alias.c (compute_may_aliases): Restore call to
	dump_referenced_vars.
	(compute_points_to_and_addr_escape): If the address of a
	variable V is stored into a non-pointer variable, mark V as
	call-clobbered.
	* tree-tailcall.c (suitable_for_tail_opt_p): Check for
	call-clobbered instead of TREE_ADDRESSABLE.
	Ignore memory tags.
	(optimize_tail_call): Add newline to dump output.

2004-02-27  Diego Novillo  <dnovillo@redhat.com>

	PR optimization/13347
	* tree-sra.c (scalarize_structure_assignment): Use STRIP_NOPS
	instead of STRIP_USELESS_TYPE_CONVERSION to remove type casts
	from RHS of the assignment.

	* tree-ssa.c (tree_ssa_useless_type_conversion_1): Reformat
	and rephrase comments.
	* tree.h (STRIP_USELESS_TYPE_CONVERSION): Reformat comment.

2004-02-26  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (tree_redirect_edge_and_branch_1): Allow to redirect
	RETURN_EXPR branches.

2004-02-26  Jeff Law  <law@redhat.com>

	* tree-nrv.c (tree_nrv): Only perform NRV optimization when the
	return value lives in memory.

	* tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): If an
	operand is unsigned, then we can eliminate more ABS expressions
	and turned div/mod expression into shift/and expressions.

	* fold-const.c (fold): An equality comparison of the address of
	two non-weak variables has known compile-time result.

2004-02-26  Andrew Pinski  <pinskia@physics.uc.edu>

	* tree-ssa-phiopt.c (conditional_replacement):
	s/tree_dump_flags/dump_flags/.

	* tree-ssa-phiopt.c (tree_ssa_phiopt): Split into ...
	(conditional_replacement): Here.

2004-02-26  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa.c (find_replaceable_in_bb): Don't repalce expressions in
	volatile statements.

2004-02-25  Richard Henderson  <rth@redhat.com>

	PR opt/14288
	* gimplify.c (gimple_push_cleanup): Add VAR argument.  Set
	TREE_NO_WARNING if in a conditional context.
	(gimplify_target_expr): Pass new argument.
	* tree-sra.c (lookup_scalar): Copy TREE_NO_WARNING to replacement.

2004-02-24  Kazu Hirata  <kazu@cs.umass.edu>

	* doc/invoke.texi: Replace -fdump-tree-all-ssa with
	-fdump-tree-all.

2004-02-24  Kazu Hirata  <kazu@cs.umass.edu>

	PR target/14285
	* config/arm/arm.c (arm_compute_func_type): Replace
	"current_function_needs_context" with "cfun->static_chain_decl
	!= NULL".
	(arm_compute_initial_elimination_offset): Likewise.
	* config/h8300/h8300.c (h8300_emit_stack_adjustment):
	Likewise.
	* config/sh/sh.c (output_stack_adjust): Likewise.
	(sh5_schedule_saves): Likewise.
	* config/xtensa/xtensa.c (compute_frame_size): Likewise.

2004-02-24  Richard Henderson  <rth@redhat.com>

	* c-simplify.c (c_genericize): s/dump_flags/local_dump_flags/.
	* predict.c, tree-alias-ander.c, tree-cfg.c, tree-nrv.c,
	tree-optimize.c, tree-pass.h, tree-sra.c, tree-ssa-alias.c,
	tree-ssa-ccp.c, tree-ssa-copy.c, tree-ssa-dce.c, tree-ssa-dom.c,
	tree-ssa-dse.c, tree-ssa-forwprop.c, tree-ssa-loop.c,
	tree-ssa-phiopt.c, tree-ssa-pre.c, tree-ssa.c, tree-tailcall.c:
	s/tree_dump_flags/dump_flags/.

2004-02-24  Richard Henderson  <rth@redhat.com>

	* predict.c, tree-alias-ander.c, tree-cfg.c, tree-mudflap.c,
	tree-nrv.c, tree-optimize.c, tree-pass.h, tree-profile.c, tree-sra.c,
	tree-ssa-alias.c, tree-ssa-ccp.c, tree-ssa-copy.c, tree-ssa-dce.c,
	tree-ssa-dom.c, tree-ssa-dse.c, tree-ssa-forwprop.c, tree-ssa-loop.c,
	tree-ssa-operands.c, tree-ssa-phiopt.c, tree-ssa-pre.c, tree-ssa.c,
	tree-tailcall.c: s/tree_dump_file/dump_file/g.

2004-02-24  Diego Novillo  <dnovillo@redhat.com>

	* doc/tree-ssa.texi: Fix formatting mark ups.

2004-02-24  Jeff Law  <law@redhat.com>

	* gimple-low.c (remove_useless_vars): Now static.
	(pass_remove_useless_vars): New.
	* tree-flow.h (remove_useless_vars): Remove prototype.
	* tree-nrv.c (struct nrv_data): Remove visited hashtable.
	(finalize_nrv_r): Do not descend into types. No need to update
	the visited hashtable.
	(tree_nrv): No need to allocate/free the visited hashtable.
	Clear the used flag on the variable's annotation.
	* tree-optimize.c (init_tree_optimizatio_passes): Link in
	pass_remove_useless_vars.
	* tree-pass.h (pass_remove_useless_vars): Declare.
	* tree-ssa.c (rewrite_out_of_ssa): Do not remove useless vars here.

	* Makefile.in (OBJS-common): Add tree-nrv.o.
	(tree-nrv.o): Add dependencies.
	* timevar.def (TV_TREE_NRV): New timevar.
	* tree-nrv.c: New file implementing NRV on generic trees.
	* tree-optimize.c (init_tree_optimization_passes): Link in
	tree_nrv optimization pass.
	* tree-pass.h (tree_nrv): Declare.
	* doc/invoke.texi: Add -fdump-tree-nrv documentation.

2004-02-24  Sebastian Pop  <sebastian.pop@cri.ensmp.fr>

	* tree-flow.h (walk_use_def_chains_fn): Return a boolean.
	True for stopping the use-def walk, false otherwise.
	* tree-ssa-alias.c (collect_points_to_info_r): Same.
	Always return false, and never stopping the def-use walk as before.
	* tree-ssa.c (walk_use_def_chains_1): Stop when the result of the
	callback function is true.
	* doc/tree-ssa.texi: Document the behavior of the callback
	function for walk_use_def_chains.

2004-02-24  Richard Henderson  <rth@redhat.com>

	* doc/passes.texi: Rewrite.

2004-02-23  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (TEXI_GCCINT_FILES): Add cfg.texi and tree-ssa.texi
	* tree-ssa-alias.c (compute_may_aliases): Update documentation.
	* doc/gccint.texi: Add node for Tree SSA documentation.
	Include tree-ssa.texi.
	* doc/tree-ssa.texi: New file.

2004-02-23  Dale Johannesen <dalej@apple.com>

	* config/rs6000/rs6000.md:  Roll in changes from mainline:
	(movdf_softfloat64):  Add POWER form of nop.
	(movsf_hardfloat): Ditto, and accept CTR-to-CTR copy.
	(movdf_hardfloat64):  Ditto.

2004-02-23  Jeff Law  <law@redhat.com>

	* ggc-page.c (struct page_entry): New field PREV.
	(ggc_alloc): Update PREV field appropriately.
	(sweep_pages): Likewise.
	(ggc_free): Likewise.  Use PREV field rather than loop to
	improve ggc_free performance.

	* Makefile.in (OBJC-common): Add tree-ssa-copy.o.
	(tree-ssa-copy.o): Add dependencies.
	* tree-flow.h (propagate_value, replace_exp): Prototype.
	(cprop_into_stmt, cprop_into_successor_phis): Likewise.
	* tree-ssa-copy.c: New file, most functions copied from tree-ssa-dom.c
	(cprop_into_stmt): Handle pointer & reference types better.
	* tree-ssa-dom.c (opt_stats_d): Kill uninteresting stats.
	(dump_dominator_optimization_stats): Corresponding changes.
	(cprop_into_stmt): Moved into tree-ssa-copy.c.
	(propagate_value): Likewise.
	(cprop_into_phis): Simplify using code fromi tree-ssa-copy.c.
	(optimize_stmt): Pass additional argument to cprop_into_stmt.
	* tree-ssa-pre.c (generate_expr_as_of_bb): Use replace_exp.
	(generate_vops_as_of_bb): Similarly.

2004-02-21  Jan Hubicka  <jh@suse.cz>

	* cgraphunit.c (decide_is_function_needed): Nested functions of extern
	inline functions don't need to be output.
	(expand_function): Re-enable sanity check.

2004-02-21  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa-loop.c (do_while_loop_p): New function.
	(copy_loop_headers): Do not peel do-while loops.

2004-02-21  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (cleanup_control_expr_graph): Update profile.

	* tree-cfg.c (disband_implicit_edges): Set fallthru edges correctly.

	* cfg.c (dump_flow_info): Work on trees too.

	* tree-pretty-print.c (dump_generic_bb_stuff):  Do not touch bb
	annotations when not allocated.

2004-02-21  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (cprop_into_stmt): Look at the type's main variant
	to determine if the two operands of a copy have equivalent types.

2004-02-20  Jeff Law  <law@redhat.com>

	* tree-flow-inline.h (may_propagate_copy): Do not perform ABNORMAL_PHI
	and DECL_HARD_REGISTER tests on virtual operands.
	* tree-flow.h (propagate_copy): Kill prototype.
	(propagate_value): New prototype.
	* tree-ssa-dom.c (propagate_copy): Now static.
	(propagate_value): No longer static.

2004-02-20  Richard Henderson  <rth@redhat.com>

	PR middle-end/14218
	* c-simplify.c (mark_labels_r): Move to ...
	* gimplify.c (force_labels_r): ... here, and rename.
	(gimplify_init_constructor): Invoke it.
	* tree-simple.h (force_labels_r): Declare.

2004-02-20  Richard Henderson  <rth@redhat.com>

	PR opt/14194
	* tree-ssa-ccp.c (substitute_and_fold): Also mark new vars
	if fold_stmt was successful.

2004-02-20  Diego Novillo  <dnovillo@redhat.com>

	* doc/invoke.texi: Add documentation for parameters
	global-var-threshold and max-aliased-vops.
	* params.def (PARAM_GLOBAL_VAR_THRESHOLD): Reformat help message.
	(PARAM_MAX_ALIASED_VOPS): Rename from PARAM_MAX_ALIAS_SET_SIZE.
	* params.h (MAX_ALIASED_VOPS): Rename from MAX_ALIAS_SET_SIZE.
	Update all users.
	* tree-ssa-alias.c (struct alias_map_d): Document fields.
	Add fields total_alias_vops, grouped_p and may_aliases.
	(struct alias_info): Change fields addressable_vars and
	pointers to malloc'd arrays.  Update all users.
	Add fields num_references and total_alias_vops.
	(compute_may_aliases): Add more comments.
	(init_alias_info): Initialize new fields in struct alias_info.
	(delete_alias_info): Corresponding changes.
	(compute_points_to_and_addr_escape): Count references to
	potentially aliased variables and pointer dereferences.
	(compute_flow_insensitive_aliasing): Remove old grouping
	heuristic.
	Count the number of virtual operands induced by all the alias
	sets created and call group_aliases if the number exceeds the
	threshold set by --param max-aliased-vops.
	(total_alias_vops_cmp): New.
	(group_aliases_into): New.
	(group_aliases): New.
	* tree-ssa-operands.c (get_expr_operands): Change dump file
	message when no flow-sensitive alias information is available.
	(add_stmt_operand): Reformat comment.
	* tree-ssa.c (init_tree_ssa): Don't call bitmap_clear.

	* tree-simple.c (get_base_decl): Fix typo in comment.

	* tree-pretty-print.c (print_call_name): Handle matrices of
	function pointers.

2004-02-20  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* Makefile.in (tree-ssa-loop.o): Add tree-inline.h dependency.
	* basic-block.h (struct reorder_block_def): Moved from cfglayout.h.
	(alloc_rbi_pool, initialize_bb_rbi, free_rbi_pool): New.
	* bb-reorder.c (copy_bb): Use cfghooks for bb duplication.
	* cfg.c (rbi_pool): New variable.
	(alloc_rbi_pool, free_rbi_pool, initialize_bb_rbi): New functions.
	* cfghooks.c (can_duplicate_block_p, duplicate_block): New functions.
	* cfghooks.h (struct cfg_hooks): Add can_duplicate_block_p and
	duplicate_block hooks.
	(can_duplicate_block_p, duplicate_block): Declare.
	* cfglayout.c (cfg_layout_pool, cfg_layout_initialize_rbi): Removed.
	(fixup_reorder_chain): Use initialize_bb_rbi.
	(cfg_layout_can_duplicate_bb_p, cfg_layout_duplicate_bb): Hookized.
	(cfg_layout_initialize): Use cfg.c rbi pool manipulation functions.
	(can_copy_bbs_p, copy_bbs): Use cfghooks for bb duplication.
	* cfglayout.h (typedef struct reorder_block_def): Moved to
	basic_block.h.
	(cfg_layout_can_duplicate_bb_p, cfg_layout_duplicate_bb): Declaration
	removed.
	* cfgrtl.c (cfg_layout_create_basic_block): Use initialize_bb_rbi.
	(rtl_cfg_hooks, cfg_layout_rtl_cfg_hook): Fill in can_duplicate_block_p
	and duplicate_block fields.
	* common.opt (ftree-ch): Add.
	* flags.h (flag_tree_ch): Declare.
	* jump.c (next_nonnote_insn_in_loop, duplicate_loop_exit_test,
	copy_loop_headers): Removed.
	* loop-unswitch.c (unswitch_loop): Use cfghooks for bb duplication.
	* opts.c (decode_options): Enable flag_tree_ch at -O1.
	(common_handle_option): Handle -ftree_ch.
	* rtl.h (copy_loop_headers): Declaration removed.
	* timevar.def (TV_TREE_CH): New.
	* toplev.c (flag_tree_ch): New.
	(rest_of_compilation): Do not call copy_loop_headers.
	* tracer.c (tail_duplicate): Use cfghooks for bb duplication.
	* tree-cfg.c (build_tree_cfg): Call alloc_rbi_pool.
	(create_bb): Call initialize_bb_rbi.
	(delete_tree_cfg): Call free_rbi_pool.
	(tree_duplicate_bb): Hookize.
	(tree_can_duplicate_bb_p): New.
	(tree_cfg_hooks): Fill in can_duplicate_block_p and duplicate_block
	fields.
	* tree-flow.h (tree_duplicate_bb): Declaration removed.
	* tree-optimize.c (init_tree_optimization_passes): Add pass_ch.
	* tree-pass.h (pass_ch): Declare.
	* tree-ssa-loop.c: Include tree-inline.h.
	(call_expr_p, should_duplicate_loop_header_p, mark_defs_for_rewrite,
	duplicate_blocks, copy_loop_headers, gate_ch): New functions.
	(pass_ch): New.
	* doc/invoke.texi (-fdump-tree-ch, -ftree-ch): Document.

2004-02-19  David Edelsohn  <edelsohn@gnu.org>

	* config/rs6000/aix.h (MFWRAP_SPEC): Define.
	(MFLIB_SPEC): Define.

2004-02-19  Jeff Law  <law@redhat.com>

	* tree-ssa-phiopt.c (tree_ssa_phiopt): TRUTH_NOT_EXPR is valid
	gimple code.

2004-02-19  Steven Bosscher  <stevenb@suse.de>

	* tree-cfg.c (cleanup_dead_labels): New function to remove
	redundant labels.

	Remove the RTL inliner.
	* calls.c (try_to_integrate): Remove.
	(expand_call): Do not try to expand calls inline.
	* dbxout.c (dbxout_symbol_location): Don't mention integrate.c
	in comments.
	* expmed.c (extract_fixed_bit_field): Always propagate the
	target for the shift if it is a REG.
	* expr.c (emit_move_insn_1): Don't generate inline warnings.
	(expand_expr_real_1): Don't look at inline_function_decl.
	Don't output inlined functions here.
	* expr.h (expand_inline_function): Remove prototype.
	* emit-rtl.c (copy_most_rtx): Don't copy the integrated flag.
	Copy the new return_val flag.
	* final.c (final): Don't look at RTX_INTEGRATED_P.
	* cfgrtl.c (create_basic_block_structure): Likewise.
	* haifa-sched.c (priority): Likewise.
	(restore_line_notes): Likewise.
	* function.c (inline_function_decl): Remove.
	(put_var_into_stack): Don't use it.
	(fix_lexical_addr): Likewise.
	* function.c (inline_function_decl): Remove extern declaration.
	* genattrtab.c (ATTR_PERMANENT_P): Use the return_val flag
	instead of the integrated flag.
	* integrate.c (INTEGRATE_THRESHOLD): Remove.
	(setup_initial_hard_reg_value_integration): Likewise.
	(initialize_for_inline): Likewise.
	(note_modified_parmregs): Likewise.
	(integrate_parm_decls): Likewise.
	(process_reg_param): Likewise.
	(save_parm_insns): Likewise.
	(copy_insn_list): Likewise.
	(copy_insn_notes): Likewise.
	(compare_blocks): Likewise.
	(find_block): Likewise.
	(inlining): Likewise.
	(function_cannot_inline_p): Likewise.
	(parmdecl_map): Likewise.
	(in_nonparam_insns): Likewise.
	(save_for_inline): Likewise.
	(FIXED_BASE_PLUS): Likewise.
	(expand_inline_function): Likewise.
	(copy_rtx_and_substitute): Don't look at map->integrating,
	map->inline_target, and inlining, since we are never copying
	for integrating.
	Don't abort on RTX_INTEGRATED_P.
	(old_fun): Remove.
	(output_inline_function): Remove.
	* integrate.h (struct inline_map): Remove fields integrating,
	block_map, leaf_reg_map, inline_target, and local_return_label.
	* print-rtl.c (print_rtx): Don't print the integrated flag.
	Print the return_val flag.
	* rtl.h (struct rtx_def): Replace the integrated flag with the
	return_val flag.
	(RTX_INTEGRATED_P): Remove.
	(notice_rtl_inlining_of_deferred_constant): Remove prototype.
	* stmt.c (force_label_rtx): Don't look at inline_function_decl.
	* toplev.c (rest_of_handle_inlining): Remove.
	(rest_of_compilation): Don't call it, and never jump to exit.
	Call convert_from_eh_region_ranges.
	(wrapup_global_declarations): Don't output nested inlined functions.
	* tree.h (function_cannot_inline_p): Remove prototype.
	(save_for_inline): Ditto.
	(output_inline_function): Ditto.
	* unroll.c (unroll_loop): Don't clear map->inline_target.
	* varasm.c (notice_rtl_inlining_of_deferred_constant): Remove.

	* system.h: Poison INTEGRATE_THRESHOLD.
	* config/avr/avr.h: Remove define.
	* config/ip2k/ip2k.h: Likewise.

	* unwind-sjlj.c (uw_install_context): Make a proper static inline
	function.

	* doc/rtl.texi: Remove references to the integrated flag.
	* doc/tm.texi: Remove documentation of INTEGRATE_THRESHOLD.

2004-02-17  Andrew Macleod  <amacleod@redhat.com>

	* tree-ssa-live.c (coalesce_tpa_members): Don't coalesce partitions
	which are not in the same TPA group.
	* tree-ssa.c (rewrite_out_of_ssa): Coalesce via list first.

2004-02-17  Brian Booth  <bbooth@redhat.com>

	* tree-ssa-ccp.c (substitute_and_fold): Update stmt after
	calling fold_stmt.

2004-02-16  Andrew Pinski  <pinskia@physics.uc.edu>

	* config/rs6000/rs6000.c (output_function_profiler): Check
	cfun->static_chain_decl instead of current_function_needs_context.

2004-02-16  Jeff Law  <law@redhat.com>

	* tree-ssa.dse.c (dse_optimize_stmt): Dump info when we delete
	stores.

	* tree-ssa-dse.c: Update comments.

	* Makefile.in (OBJS-common): Add tree-ssa-dse.o
	(tree-ssa-dse.o): Add dependencies.
	* common.opt (ftree-dse): New option.
	* flags.h (flag_tree_dse): New.
	(flag_tree_dom): Fix comments.
	* opts.c (decode_options): Turn on flag_tree_dse.
	(common_handle_option): Handle  OPT_ftree_dse.
	* timevar.def (TV_TREE_PHIOPT): Update text.
	(TV_TREE_DSE): New timevar.
	* toplev.c (flag_tree_dse): New.
	(flag_tree_dom): Fix comments.
	(lang_independent_options): Add -ftree-dse.
	* tree-dfa.c (redirect_immediate_use): New function.
	(redirect_immediate_uses): New function.
	* tree-flow.h (stmt_ann_d): Add UID field.
	(redirect_immediate_uses): Declare.
	* tree-optimize.c (init_tree_optimization_passes): Link in DSE pass.
	* tree-pass.h (pass_dse): Declare.
	* tree-ssa-dse.c: New file implementing DSE.
	* doc/invoke.texi: Document new option.

2004-02-16  Richard Henderson  <rth@redhat.com>

	* tree-nested.c: New file.
	* Makefile.in (OBJS-common, GTFILES, tree-nested.o): Add it.
	* builtin-types.def (BT_FN_VOID_PTR_PTR, BT_FN_VOID_PTR_PTR_PTR): New.
	* builtins.c (expand_builtin_nonlocal_goto): New.
	(expand_builtin_apply): Fix prepare_call_address args.
	(round_trampoline_addr): Move from function.c.
	(expand_builtin_init_trampoline): New.
	(expand_builtin_adjust_trampoline): New.
	(expand_builtin): Invoke them.
	(build_function_call_expr): Add CALL_EXPR chain operand.
	* builtins.def (BUILT_IN_INIT_TRAMPOLINE,
	BUILT_IN_ADJUST_TRAMPOLINE, BUILT_IN_NONLOCAL_GOTO): New.
	* c-decl.c (finish_function): Call lower_nested_functions.
	(c_expand_decl): Don't declare_nonlocal_label.
	* calls.c (prepare_call_address): Replace fndecl arg with a
	precomputed static chain value.
	(expand_call): Precompute the static chain value.  Use
	update_nonlocal_goto_save_area.
	* cgraph.c (cgraph_mark_reachable_node): Don't force nested
	functions to be reachable.
	(cgraph_clone_node): Don't abort cloning functions containing
	nested functions.
	* cgraphunit.c (cgraph_assemble_pending_functions): Don't do
	anything special for nested functions.
	(cgraph_mark_functions_to_output): Likewise.
	(cgraph_estimate_growth, cgraph_clone_inlined_nodes): Likewise.
	(cgraph_optimize): Likewise.
	(cgraph_finalize_function): Don't zap DECL_SAVED_INSNS.
	(cgraph_expand_function): Allow functions to not be emitted.
	* defaults.h (TRAMPOLINE_ALIGNMENT): Move from function.c.
	* dwarf2out.c (gen_subprogram_die): Generate DW_AT_static_link.
	* emit-rtl.c (maybe_set_first_label_num): New.
	* explow.c (update_nonlocal_goto_save_area): New.
	(allocate_dynamic_stack_space): Use it.
	* expr.c (expand_expr_real_1) <LABEL_DECL>: Don't force_label_rtx.
	<COND_EXPR>: Ignore the possibility of non-local labels.
	<ADDR_EXPR>: Don't do trampoline_address.
	* expr.h (lookup_static_chain): Remove.
	(prepare_call_address): Update 2nd arg.
	(update_nonlocal_goto_save_area): Declare.
	* final.c (profile_function): Update static chain test.
	* function.c (TRAMPOLINE_ALIGNMENT): Move to defaults.h.
	(trampolines_created): Move to varasm.c.
	(free_after_compilation): Update for removed fields.
	(allocate_struct_function): Likewise.
	(delete_handlers, lookup_static_chain): Remove.
	(fix_lexical_addr): Don't consider non-local variable refs.
	(trampoline_address): Remove.
	(round_trampoline_addr): Move to builtins.c.
	(adjust_trampoline_addr): Remove.
	(expand_function_start): Update for changes to static chain
	and nonlocal goto handling.
	(initial_trampoline): Move to varasm.c.
	(expand_function_end): Don't build trampolines or kill
	unreferenced nonlocal goto labels.
	* function.h (struct function): Remove x_nonlocal_labels,
	x_nonlocal_goto_handler_slots, x_nonlocal_goto_stack_level,
	x_context_display, x_trampoline_list, needs_context.
	Add static_chain_decl, nonlocal_goto_save_area.
	* gimple-low.c (record_vars): Don't record functions.
	* gimplify.c (declare_tmp_vars): Export.
	(create_artificial_label): Set type.
	(gimplify_expr): Don't consider nonlocal gotos.
	* integrate.c (expand_inline_function): Kill lookup_static_chain ref.
	* jump.c (any_uncondjump_p): Reject nonlocal goto.
	* rtl.h (maybe_set_first_label_num): Declare.
	* stmt.c (label_rtx): Set LABEL_PRESERVE_P appropriately.
	(expand_label): Handle DECL_NONLOCAL and FORCED_LABEL.
	(declare_nonlocal_label): Remove.
	(expand_goto): Don't handle nonlocal gotos.
	(expand_nl_handler_label): Remove.
	(expand_nl_goto_receivers): Remove.
	(expand_end_bindings): Don't expand_nl_goto_receivers.  Use
	update_nonlocal_goto_save_area.
	* tree-cfg.c (make_edges): Handle abnormal edges out of block
	falling through to EXIT.
	(make_ctrl_stmt_edges): Don't check GOTO_EXPR for nonlocal goto.
	Handle computed goto with no destinations.
	(tree_can_merge_blocks_p): Don't merge blocks with nonlocal labels.
	(remove_useless_stmts_label, stmt_starts_bb_p): Likewise.
	(tree_forwarder_block_p): Likewise.
	(nonlocal_goto_p): Remove.
	(tree_verify_flow_info): Update to match.
	* tree-dump.c (dump_files): Add tree-nested.
	* tree-flow.h (nonlocal_goto_p): Remove.
	* tree-inline.c (setup_one_parameter): Split out from ...
	(initialize_inlined_parameters): ... here.  Handle static chain.
	(inline_forbidden_p_1): Update nonlocal goto check.
	(expand_call_inline): Disable mysterious cgraph abort.
	* tree-optimize.c (tree_rest_of_compilation): Save DECL_SAVED_INSNS.
	* tree-pretty-print.c (dump_generic_node): Print static chain
	and nonlocal label.
	* tree-simple.h (declare_tmp_vars): Declare.
	(lower_nested_functions): Declare.
	* tree-ssa-dom.c (propagate_value): Avoid sharing problems.
	* tree-ssa-operands.c (get_expr_operands): Walk static chain
	field of call_expr.
	* tree.def (CALL_EXPR): Add static chain operand.
	* tree.h (NONLOCAL_LABEL): Remove.
	(TDI_nested): New.
	* varasm.c (TRAMPOLINE_ALIGNMENT): Remove.
	(initial_trampoline): Move from function.c.
	(assemble_trampoline_template): Set and return it.
	(trampolines_created): Move from function.c.

2004-02-16  Steven Bosscher  <stevenb@suse.de>

	* tree-flow.h (cleanup_control_expr_graph): Don't declare here.
	* tree-cfg.c (cleanup_control_expr_graph): Make static.
	(find_edge_taken_cond_expr): Return an edge if the true and false
	edges of a branch lead to the same basic block.

2004-02-13  Diego Novillo  <dnovillo@redhat.com>

	* tree-phinodes.c (resize_phi_node): Do not use ggc_realloc to
	allocate a new PHI node.

2004-02-12  Diego Novillo  <dnovillo@redhat.com>

	* tree-flow.h (kill_redundant_phi_nodes): Remove declaration.
	* tree-optimize.c (init_tree_optimization_passes): Add
	pass_redundant_phi after DOM and CCP.
	(execute_todo): Do not call kill_redundant_phi_nodes.
	* tree-pass.h (TODO_redundant_phi): Remove.
	Update all users.
	Adjust values for all the other TODO_* entries.
	(pass_redundant_phi): Declare.
	* tree-ssa.c (replace_immediate_uses): Call mark_new_vars_to_rename
	if a pointer was replaced.
	(kill_redundant_phi_nodes): Make static.
	(pass_redundant_phi): Define.

2004-02-12  Dale Johannesen  <dalej@apple.com>

	* Makefile.in (OBJS-common): Add rtl-profile.o, tree-profile.o.
	(profile.o): Add tree-flow.h dependency.
	(rtl-profile.o): New rule.
	(tree-profile.o): New rule.
	(GTFILES): Add tree-profile.c, rtl-profile.c.
	* basic-block.h (flow_call_edges_add): Remove.
	* cfganal.c (need_fake_edge_p): Move to cfgrtl.c.
	(flow_call_edges_add): Move to cfgrtl.c.
	* cfghooks.c: (block_ends_with_call_p): New.
	(block_ends_with_condjump_p): New.
	(flow_call_edges_add): New.
	* cfghooks.h: (struct cfg_hooks): add block_ends_with_call_p,
	block_ends_with_condjump_p, flow_call_edges_add.
	(block_ends_with_call_p): New declaration.
	(block_ends_with_condjump_p): New declaration.
	(flow_call_edges_add): New declaration.
	* cfgrtl.c (rtl_block_ends_with_call_p): New.
	(rtl_block_ends_with_condjump_p): New.
	(need_fake_edge_p): Moved from cfganal.c.
	(rtl_flow_call_edges_add): Moved from cfganal.c (flow_call_edges_add).
	(rtl_cfg_hooks): Add rtl_block_ends_with_call_p,
	rtl_block_ends_with_condjump_p, rtl_flow_call_edges_add.
	(cfg_layout_rtl_cfg_hooks): Ditto.
	* common.opt (ftree-based-profiling): New.
	* coverage.c (tree_ctr_tables): New.
	(coverage_counter_alloc): Use it.
	(build_ctr_info_value): Ditto.
	(coverage_counter_ref): Ditto.  Rename to rtl_coverage_counter_ref.
	(tree_coverage_counter_ref): New.
	* coverage.h (coverage_counter_ref): Remove declaration.
	(rtl_coverage_counter_ref): New declaration.
	(tree_coverage_counter_ref): New declaration.
	* opts.c (OPT_ftree_based_profiling): New.
	* profile.c: Include cfghooks.h, tree-flow.h.
	(profile_hooks): New.
	(profile_dump_file): New.
	(instrument_edges): Use hooks instead of RTL-specific code.
	(instrument_values): Ditto.
	(get_exec_counts): Ditto.
	(compute_branch_probabilities): Ditto.
	(compute_value_histograms): Ditto.
	(branch_prob): Ditto.
	(find_spanning_tree): Ditto.
	(end_branch_prob): Ditto.
	(gen_edge_profiler): Move to rtl-profile.c (rtl_gen_edge_profiler).
	(gen_interval_profiler): Ditto (rtl_gen_interval_profiler).
	(gen_pow2_profiler): Ditto (rtl_gen_pow2_profiler).
	(gen_one_value_profiler): Ditto (rtl_gen_one_value_profiler).
	(tree_register_profile_hooks): New.
	(rtl_register_profile_hooks): New.
	* rtl-profile.c: New file.
	* rtl.h (init_branch_prob): Move declaration to value-prof.h.
	(end_branch_prob): Ditto.
	(branch_prob): Ditto.
	* toplev.c (flag_tree_based_profiling): New.
	(f_options): Add -ftree-based-profiling.
	(compile_file): Register rtl-based CFG and profiling hooks.
	(rest_of_compilation): Do rtl-based profiling only when
	!flag_tree_based_profiling.  Register rtl-based profiling hooks.
	(process_options): Sorry for -ftree-based-profiling plus
	-ftest-coverage or -fprofile-values.
	* toplev.h (flag_tree_based_profiling): New.
	* tree-cfg.c (tree_block_ends_with_call_p): New.
	(tree_block_ends_with_condjump_p): New.
	(need_fake_edge_p): New.
	(tree_flow_call_edges_add): New (largely from flow_call_edges_add
	in cfganal.c).
	(tree_cfg_hooks): Add tree_block_ends_with_call_p,
	tree_block_ends_with_condjump_p, tree_flow_call_edges_add.
	* tree-optimize.c (init_tree_optimization_passes):
	Add pass_tree_profile.
	* tree-pass.h: Ditto.
	* tree-profile.c: New file.
	* value-prof.c (value_prof_hooks): New.
	(find_values_to_profile): Rename to rtl_find_values_to_profile.
	Move rtl-specific bits in from branch_prob.
	(value_profile_transformations): Rename to
	rtl_value_profile_transformations.
	(struct value_prof_hooks): New.
	(rtl_value_prof_hooks): New.
	(rtl_register_value_prof_hooks): New.
	(tree_find_values_to_profile): New stub.
	(tree_value_profile_transformations): New stub.
	(tree_value_prof_hooks): New stub.
	(tree_register_value_prof_hooks): New stub.
	(find_values_to_profile): New.
	(value_profile_transformations): New.
	* value-prof.h: Add multiple inclusion guard.
	(struct histogram_value): Change rtx fields to void *.
	(rtl_register_value_prof_hooks): New declaration.
	(tree_register_value_prof_hooks): New declaration.
	(find_values_to_profile): New declaration.
	(free_profiled_values): New declaration.
	(value_profile_transformations): New declaration.
	(struct profile_hooks): New declaration.
	(init_branch_prob): Declaration moved from rtl.h.
	(branch_prob): Declaration moved from rtl.h.
	(end_branch_prob): Declaration mooved from rtl.h.
	(tree_register_profile_hooks): New declaration.
	(rtl_register_profile_hooks): New declaration.
	(tree_profile_hooks): New declaration.
	(rtl_profile_hooks): New declaration.
	* doc/invoke.texi: Document -ftree-based-profiling.

2004-02-12  Jeff Law  <law@redhat.com>

	* domwalk.c (walk_dominator_tree): Move statement walking from
	clients into here.  Walk statements in forward or backward order
	as requested by the client.  Walk either the dominator tree or
	the post-dominator tree as requested by the client.
	* domwalk.h (dom_walk_data): Add two fields to control direction of
	statement walk and dominator vs post-dominator tree walk.  Add
	BSI argument to the per-statement callbacks.
	* tree-ssa-dom.c (optimize_stmt): Update prototype so that it can
	be directly used as a callback for the dominator tree walker.
	Update stmts_to_rescan here.
	(tree_ssa_dominator_optimize): Initialize new fields in the dominator
	walker structure.  Use optimize_stmt instead of dom_opt_walk_stmts
	for statement callback.
	(dom_opt_walk_stmts): Kill.  No longer used.
	* tree-ssa.c (mark_def_sites): Update prototype so that it can be
	called as the per-statement callback.  No longer walk statements here.
	(mark_def_sites_initialize_block): New.
	(rewrite_stmt): Update prototype so that it can be called as the
	per-statement callback.
	(rewrite_walk_stmts): Kill.  No longer used.
	(rewrite_into_ssa): Initialize new fields in the dominator walker
	structure.  Use rewrite_stmt instead of rewrite_walk_stmts.  Add
	mark_def_sites_initialize_block callback.

2004-02-12  Steven Bosscher  <stevenb@suse.de>

	* doc/cfg.texi: New file.
	* doc/ggcint.texi: Include it.  Add a new chapter.

2004-02-11  Jeff Law  <law@redhat.com>

	* Makefile.in (OBJS-common): Add tree-ssa-forwprop.o
	(tree-ssa-forwprop.o): Add dependencies.
	* timevar.def (TV_TREE_FORWPROP): New timevar.
	* tree-optimize.c (init_tree_optimization_passes): Link in
	the forward propagation pass.
	* tree-pass.h (pass_forwprop): Declare.
	* tree-ssa-forwprop.c: New file with forward propagation pass.
	* doc/invoke.texi: Document dump for forward propagation pass.

2004-02-11  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa.c (rewrite_out_of_ssa): Don't use coalesce list until new
	bug resolved.

2004-02-11  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-live.c (compare_pairs): New.  Coalesce list cost function.
	(sort_coalesce_list): Use qsort() to sort list by cost.
	(coalesce_tpa_members): Use correct partition representatives.  Add more
	debug information.  Allow coalesce by list, root_var, or both.
	(tpa_dump): Show partition index.
	* tree-ssa-live.h (SSANORM_COALESCE_PARTITIONS): New flag.
	(SSANORM_USE_COALESCE_LIST): New flag.
	* tree-ssa.c (create_temp): Don't mark as used when created.
	(coalesce_ssa_name): Create coalesce list if requested.  Add more
	debug output.
	(assign_vars): Add additional debug info.
	(remove_ssa_form): Perform TER after assign_vars().
	(rewrite_vars_out_of_ssa): Pass coalesce partitions flag to
	remove_ssa_form.
	(rewrite_out_of_ssa): Add coalesce list flag to remove_ssa_form call.

2004-02-10  Jeff Law  <law@redhat.com>

	* Makefile.in (OBJS-common): Add tree-ssa-phiopt.o
	(tree-ssa-phiopt.o): Add dependencies.
	* timevar.def (TV_TREE_PHIOPT): New timevar.
	* tree-cfg.c (extract_true_false_edges_from_block): Moved here from
	tree-ssa-dom.c.
	(tree_verify_flow_info): Use extract_true_false_edges_from_block.
	* tree-flow.h (extract_true_false_edges_from_block): Declare.
	* tree-ssa-dom.c (extract_true_false_edges_from_block): Moved into
	tree-cfg.c.
	(get_eq_expr_value): Improve type check.
	* tree-optimize.c (init_tree_optimization_passes): Link in
	phiopt pass.
	* tree-pass.h (pass_phiopt): Declare.
	* tree-ssa-phiopt.c: New file with PHI node optimization pass.
	* doc/invoke.texi: Document dump for PHI node optimization.

2004-02-10  Richard Henderson  <rth@redhat.com>

	* tree-sra.c (lookup_scalar): Handle unnamed fields.

2004-02-10  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (OBJS-common): Add tree-ssa-alias.o.
	(tree-ssa-alias.o): New rule.
	(tree-ssa-operands.o): Add dependency on $(TIMEVAR_H) and tree-pass.h
	(gt-tree-dfa.h): Remove.
	* timevar.def (TV_TREE_OPS): Rename from unused entry TV_TREE_DFA.
	* tree-ssa-alias.c: New file.
	* tree-dfa.c (struct alias_stats_d, alias_stats, dump_alias_stats,
	may_alias_p, add_may_alias, global_var, aliases_computed_p,
	compute_may_aliases): Move to tree-ssa-alias.c.
	(struct walk_state): Remove fields 'is_asm_expr' and 'num_calls'.
	Update all users.
	(compute_alias_sets, create_memory_tags, may_access_global_mem_p,
	get_memory_tag_for, promote_call_clobbered_vars,
	find_addressable_vars): Remove.
	(call_clobbered_vars): Move to tree-ssa-alias.c and convert to
	bitmap.
	(find_referenced_vars): Move logic to create .GLOBAL_VAR to
	tree-ssa-alias.c.
	(create_ssa_name_ann): New.
	(dump_variable): Rearrange.
	(dump_dfa_stats): Do not show the number of call clobbered
	variables.
	(find_vars_r): Do not try to determine if an assignment my access
	global memory.
	(add_referenced_var): Remove hacks to establish global memory
	dependencies.
	If the variable needs to live in memory mark it call-clobbered.
	* tree-flow-inline.h (ssa_name_ann): New.
	(get_ssa_name_ann): New.
	(set_may_alias_global_mem): Remove.
	(may_alias_global_mem_p): Remove.
	(set_may_point_to_global_mem): Remove.
	(may_point_to_global_mem_p): Remove.
	(is_call_clobbered): New
	(mark_call_clobbered): New
	(mark_non_addressable): New
	* tree-flow.h (enum tree_ann_type): Add SSA_NAME_ANN.
	(enum mem_tag_kind): Declare.
	(struct var_ann_d): Remove fields 'is_call_clobbered',
	'may_alias_global_mem' and 'may_point_to_global_mem'.
	Replace bitfield 'mem_tag' with enum bitfield 'mem_tag_kind'.
	Rename field 'mem_tag' to 'type_mem_tag'.
	(struct stmt_ann_d): Change type of field 'addresses_taken' to a
	bitmap.  Update all users.
	(struct ssa_name_ann_d): Declare.
	(union tree_ann_d): Add field 'ssa_name'.
	(ssa_name_ann_t): New type.
	(struct bb_ann_d): Add field 'has_escape_site'.
	(num_call_clobbered_vars): Remove.
	(call_clobbered_var): Remove.
	(call_clobbered_vars): Change to bitmap.
	(dump_points_to_info): Declare.
	(debug_points_to_info): Declare.
	(walk_use_def_chains_fn): New type.
	(walk_use_def_chains): Declare.
	(is_call_clobbered): Declare.
	(mark_call_clobbered): Declare.
	* tree-simple.c (needs_to_live_in_memory): Move to tree.c.
	(is_gimple_non_addressable): Update comment.
	(is_gimple_call_clobbered): Remove.
	(get_call_expr_in): New.
	(get_base_var): Rename from get_base_symbol.  Update all callers.
	Don't strip SSA_NAME wrappers.
	(get_base_decl): New.
	(get_base_address): New.
	* tree-simple.h (is_gimple_call_clobbered): Remove.
	(needs_to_live_in_memory): Remove.
	(get_base_decl): Declare.
	(get_base_var): Declare.
	(get_base_address): Declare.
	* tree-ssa-dce.c (need_to_preserve_store): Reduce to calling
	needs_to_live_in_memory.
	* tree-ssa-operands.c: Include tree-pass.h and timevar.h
	(get_stmt_operands): Push/pop TV_TREE_OPS time var.
	Call mark_call_clobbered for asms that store to memory.
	(get_expr_operands): When adding operands for INDIRECT_REF
	expressions, use flow-sensitive aliasing, if available.
	Assume that malloc-like function calls won't clobber.
	(add_call_clobber_ops):
	(add_call_read_ops):
	* tree-ssa.c (rewrite_into_ssa): If any variable in vars_to_rename
	is a pointer, invalidate all name memory tags.
	(create_temp): Call is_call_clobbered and mark_call_clobbered.
	(walk_use_def_chains_1): New.
	(walk_use_def_chains): New.

	* tree.c (needs_to_live_in_memory): New.
	* tree.h (DECL_NEEDS_TO_LIVE_IN_MEMORY_INTERNAL): Define.
	(struct tree_decl): Add bitfield 'needs_to_live_in_memory'.
	Update unused bits comment.
	(needs_to_live_in_memory): Declare.

	* tree-simple.h (get_call_expr_in): Declare.
	* tree-sra.c (scalarize_stmt): Call get_call_expr_in when handling
	function calls.
	* tree-ssa-ccp.c (likely_value): Likewise.

	* params.def (PARAM_MAX_CLOBBERED_VARS_GLOBAL_VAR): Remove.
	(PARAM_MAX_CALLS_GLOBAL_VAR): Remove.
	(PARAM_GLOBAL_VAR_THRESHOLD): Define.
	(PARAM_MAX_ALIAS_SET_SIZE): Define.
	Update all users.
	* params.h (MAX_CALLS_FOR_GLOBAL_VAR): Remove.
	(MAX_CLOBBERED_VARS_FOR_GLOBAL_VAR): Remove.
	(GLOBAL_VAR_THRESHOLD): Define.
	(MAX_ALIAS_SET_SIZE): Define.

2004-02-09  Richard Henderson  <rth@redhat.com>

	* langhooks.h (lang_hooks_for_functions): Add missing_noreturn_ok_p.
	* langhooks-def.h, c-lang.c, objc/objc-lang.c
	(LANG_HOOKS_FUNCTION_MISSING_NORETURN_OK_P): New.
	* c-objc-common.c (c_missing_noreturn_ok_p): Return bool.
	(c_objc_common_init): Don't set lang_missing_noreturn_ok_p.
	* c-tree.h (c_missing_noreturn_ok_p): Update decl.
	* flow.c (lang_missing_noreturn_ok_p): Remove.

	* flow.c (check_function_return_warnings): Move to tree-cfg.c.
	* toplev.c (rest_of_compilation): Don't call it.
	* tree-cfg.c (execute_warn_function_return): Move from flow.c,
	rename, update for tree vs rtl.
	(pass_warn_function_return): New.
	* tree-pass.h (pass_warn_function_return): Declare it.
	* tree-optimize.c (init_tree_optimization_passes): Run it.

	* function.h (struct function): Remove x_clobber_return_insn.
	* function.c (free_after_compilation): Don't set it.
	(expand_function_end): Likewise.

2004-02-09  Richard Henderson  <rth@redhat.com>

	Revert:
	2004-02-06  Richard Henderson  <rth@redhat.com>
	* tree-ssa-dom.c (record_equivalences_from_phis): Use
	record_const_or_copy.
	(record_equivalences_from_stmt): Likewise.  Replace
	block_avail_exprs_p and block_nonzero_vars_p args with bd.

2004-02-09  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (get_eq_expr_value): Improve handling of boolean
	conditions.

	* domwalk.c (walk_dominator_tree): Completely lose PARENT argument.
	Callers updated.  No longer pass PARENT to callbacks.
	* domwalk.h (struct dom_walk_data): Corresponding changes.
	* tree-ssa-dom.c: Likewise.
	* tree-ssa.c: Likewise.

	* domwalk.c (walk_dominator_tree): Change last argument to be the
	parent block in the dominator tree rather than the last statement
	in the parent block in the dominator tree.  Similarly in all the
	callbacks.
	* domwalk.h (struct dom_walk_data): Update callback prototypes.
	* tree-ssa-dom.c: Corresponding changes.
	* tree-ssa.c: Likewise.

	* tree-ssa-dom.c (redirect_edges_and_update_ssa_graph): Break out
	of tree_ssa_dominator_optimize.  If the out-of-ssa pass creates
	new variables, then invalidate some requested jump threads.

2004-02-08  Richard Henderson  <rth@redhat.com>

	* flow.c (regno_uninitialized): Remove.
	* output.h (regno_uninitialized): Remove.
	* function.c (setjmp_vars_warning): Rename from
	uninitialized_vars_warning, remove uninitialized vars warning.
	* toplev.c (rest_of_handle_life): Update to match.
	* tree.h (setjmp_vars_warning): Likewise.

	* tree-sra.c (lookup_scalar): Set DECL_NAME to something descriptive.

	* tree-ssa.c (warn_uninit): New.
	(warn_uninitialized_var, warn_uninitialized_phi): New.
	(execute_early_warn_uninitialized): New.
	(execute_late_warn_uninitialized): New.
	(gate_warn_uninitialized): New.
	(pass_early_warn_uninitialized): New.
	(pass_late_warn_uninitialized): New.
	* tree-pass.h (pass_early_warn_uninitialized): New.
	(pass_late_warn_uninitialized): New.
	* tree-optimize.c (init_tree_optimization_passes): Add them.

2004-02-08  Richard Henderson  <rth@redhat.com>

	* cppexp.c (append_digit): Rearrange unsignedp/overflow setting.
	(eval_token, num_binary_op, num_part_mul, num_div_op): Likewise.
	* ra-rewrite.c (rewrite_program2): Zero info.
	* reload.c (decompose): Zero val.
	* tree-ssa-ccp.c (visit_phi_node): Zero phi_val.const_val.

2004-02-07  Jan Hubicka  <jh@suse.cz>

	* tree-inline.c (save_body): Clone the parm decl correctly.

	* cgraph.c: Add introductionary comment.
	(cgraph_remove_node): Release DECL_SAVED_INSNS too.
	* cgraphunit.c: Likewise.
	(cgraph_finalize_function): Release DECL_SAVED_INSNS of external function.
	(decl_expand_function): Release DECL_SAVED_INSNS/body/tree.
	(cgraph_remove_unreachable_nodes): Likewise; guard cgraph verification.

2004-02-06  Richard Henderson  <rth@redhat.com>

	* common.opt (fdisable-tree-ssa): Remove.
	* flags.h (flag_disable_tree_ssa): Remove.
	* toplev.c (flag_disable_tree_ssa): Remove.
	(f_options): Don't set it.
	* opts.c (common_handle_option): Likewise.
	* doc/invoke.texi (fdisable-tree-ssa): Remove.

2004-02-06  Richard Henderson  <rth@redhat.com>

	* tree-ssa-dom.c (record_equivalences_from_phis): Use
	record_const_or_copy.
	(record_equivalences_from_stmt): Likewise.  Replace
	block_avail_exprs_p and block_nonzero_vars_p args with bd.

2004-02-06  Andrew Pinski  <pinskia@physics.uc.edu>

	PR middle-end/13127
	* tree-inline.c (declare_return_variable): Set the no warning bit
	on the variable created for the return value.

2004-02-06  Richard Henderson  <rth@redhat.com>

	* tree-pretty-print.c (dump_generic_node): Render NON_LVALUE_EXPR.

	* tree-ssa-dom.c (local_fold): New.
	(thread_across_edge, simplify_rhs_and_lookup_avail_expr,
	find_equivalent_equality_comparison): Use it.

2004-02-06  Andrew Pinski  <pinskia@physics.uc.edu>

	PR c/13863
	* c-common.c (c_decl_uninit_1): Remove.
	(c_decl_uninit): Remove.
	* c-common.h (c_decl_uninit): Remove prototype.
	* c-lang.c (LANG_HOOKS_DECL_UNINIT): Delete.
	* objc/objc-lang.c (LANG_HOOKS_DECL_UNINIT): Delete.
	* c-simplify.c (gimplify_decl_stmt): Set TREE_NO_WARNING
	on the decl where the initial is itself.
	* function.c (uninitialized_vars_warning): Remove old comment
	and check for DECL_INITIAL, replace with a check of TREE_NO_WARNING
	and do not call the langhook.
	* langhooks-def.h (LANG_HOOKS_DECL_UNINIT): Remove.
	(LANG_HOOKS_INITIALIZER): Remove usage of LANG_HOOKS_DECL_UNINIT.
	* langhooks.c (lhd_decl_uninit): Remove.
	* langhooks.h (lhd_decl_uninit): Remove prototype.

2004-02-05  Richard Henderson  <rth@redhat.com>

	* tree-ssa-dom.c (record_const_or_copy_1): New.
	(record_const_or_copy): New.
	(thread_across_edge): Use it.
	(dom_opt_finalize_block): Likewise.  Tidy.
	(record_equality): Split out from ...
	(record_equivalences_from_incoming_edge): ... here.

2004-02-05  Richard Henderson  <rth@redhat.com>

	* tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Allow
	mixing PLUS and MINUS when folding operations.

2004-02-05  Andrew Macleod  <amacleod@redhat.com>

	* tree-pretty-print.c (dump_bb_header):  Allow TDF_SLIM printing.
	(dump_bb_end):  Allow TDF_SLIM printing.
	(dump_generic_bb_buff):  Add flags parameter to dump_bb_end.

2004-02-05  Jan Hubicka  <jh@suse.cz>

	* alias.c (find_base_term, get_addr):  Do not dereference NULL
	pointer when all VALUE's locations has been invalidated.
	(rtx_equal_for_memref_p): Simplify checking of VALUEs.

2004-02-04  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-ander.c (andersen_init): Reorder/Redo code so that we
	actually free the memory in intraprocedural mode.
	(andersen_cleanup): Ditto.

2004-02-04  Richard Henderson  <rth@redhat.com>

	* tree-ssa-ccp.c (get_value, visit_phi_node,
	visit_assignment, dump_lattice_value): Tidy.
	(evaluate_stmt): Don't do debug dump here.
	(def_to_undefined): Merge into set_lattice_value.
	(def_to_varying): Likewise, but retain as a wrapper.
	(set_lattice_value): Tidy.  Emit correct debug info.
	(replace_uses_in): Remove strlen hacks.
	(execute_fold_all_builtins): Fix DECL_BUILT_IN comparison.
	Force folding of BUILT_IN_CONSTANT_P.

2004-02-04  Richard Henderson  <rth@redhat.com>

	* builtins.c (fold_builtin_expect): New.
	(fold_builtin_1): Call it.

2004-02-04  Jeff Law  <law@redhat.com>

	* jump.c (duplicate_loop_exit_test): Allow copying of the loop
	exit test even if we do not find the LOOP_END note.

	* domwalk.c: Update comments.

2004-02-04  Brian Booth  <bbooth@redhat.com>

	PR opt/13755
	* tree-dfa.c (compute_alias_sets): set rename flag for variables
	aliased by GLOBAL_VAR.

2004-02-04  Richard Henderson  <rth@redhat.com>

	* tree-ssa-dom.c (simplify_switch_and_lookup_avail_expr): New.
	(eliminate_redundant_computations): Call it.

2004-02-03  Richard Henderson  <rth@redhat.com>

	PR opt/13869
	* tree-cfg.c (cfg_remove_useless_stmts_bb): Correct handling of
	boolean variables in COND_EXPR_COND.

2004-02-03  Richard Henderson  <rth@redhat.com>

	PR middle-end/13325
	* builtins.c (fold_builtin_1): Rename from fold_builtin.
	(fold_builtin): New.
	* c-simplify.c (gimplify_expr_stmt): Check TREE_NO_WARNING.
	* stmt.c (expand_expr_stmt_value): Likewise.
	* tree.h (struct tree_common): Add nowarning_flag.
	(TREE_NO_WARNING): New.
	(TREE_NO_UNUSED_WARNING): Remove.
	* c-typeck.c (build_unary_op): Use TREE_NO_WARNING instead.
	* stmt.c (warn_if_unused_value): Likewise.

2004-02-03  Steven Bosscher  <stevenb@suse.de>

	* tree-ssa-dce.c: Partial rewrite.  The old DCE is now called
	`conservative'.  The more aggressive algorithm uses control
	dependence and is called `aggressive' or cd-dce.
	* timevar.def (TV_TREE_DCE): Rename.
	(TV_TREE_CD_DCE, TV_CONTROL_DEPENDENCES): New timevars.
	* tree-pass.h: Declare extern pass_cd_dce.
	* tree-optimize.c (init_tree_optimization_passes): Replace
	the final DCE pass with a CD-DCE pass.

2004-02-01  Jan Hubicka  <jh@suse.cz>

	* cgraphunit.c (cgraph_mark_inline_edge): Fix insertion to
	cgraph_inline_hash.

2004-01-30  Frank Ch. Eigler  <fche@redhat.com>

	* common.opt: Add support for -fmudflapth, -fmudflapir.
	* invoke.texi: Document them.
	* opts.c: Ditto.
	* flags.h: Add new flags flag_mudflap_threads, _ignore_reads.
	* toplev.c: Initialize new flags.  Remove redundant code from
	lang_independent_options[].
	* tree-mudflap.c (*): Support new flag_mudflap_threads encoding.
	(mf_xform_derefs_1): Support flag_mudflap_ignore_reads option.
	* c-mudflap.c (mflang_flush_calls): Mark static ctor TREE_USED.

2004-01-30  Ian Lance Taylor  <ian@wasabisystems.com>

	* gengtype-yacc.y (bitfieldlen): Add empty action.

2004-01-30  Diego Novillo  <dnovillo@redhat.com>

	* configure.ac: Move configuration for libbanshee and
	libgmp from configure.in.

2004-01-30  Richard Henderson  <rth@redhat.com>

	PR opt/13524
	* gengtype-yacc.y (struct_fields): Accept unnamed bitfields.
	(bitfieldlen): Split from ...
	(bitfieldopt): ... here.
	* gimplify.c (mark_not_gimple): Remove.
	(gimplify_call_expr): Don't ignore BUILT_IN_MD.
	* tree-dfa.c (struct walk_state): Remove is_not_gimple.
	(find_referenced_vars): Don't look for TREE_NOT_GIMPLE.
	(find_vars_r, add_referenced_var): Likewise.
	* tree-ssa-operands.c (get_stmt_operands, get_expr_operands): Likewise.
	* tree-simple.h (mark_not_gimple): Remove.
	* tree.h (struct tree_common): Remove not_gimple_flag.
	(TREE_NOT_GIMPLE): Remove.

2004-01-29  Jason Merrill  <jason@redhat.com>

	PR c++/13865
	* c-simplify.c (gimplify_for_stmt): Reorganize to fix cleanups.

2004-01-29  Richard Henderson  <rth@redhat.com>

	PR c++/13543
	* tree-inline.c (initialize_inlined_parameters): Register the
	substitute reference also.

2004-01-29  Richard Henderson  <rth@redhat.com>

	* tree-inline.c (gimple_expand_calls_inline): Look inside
	RETURN_EXPR.

	* tree-pretty-print.c (dump_generic_node): If TDF_DETAILS, dump
	both name and uid.

2004-01-29  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* cfg.c (unlink_block): Reset prev_bb and next_bb.

2004-01-29  Jeff Law <law@redhat.com>
	    Andrew MacLeod <amacleod@redhat.com>

	* tree-ssa-live.h (tpa_next_partition): Correctly handle compressed
	elements.
	* tree-ssa.c (coalesce_ssa_name): New argument, flags.  Callers
	updated.  Test SSANORM_COMBINE_TEMPS in flags rather than
	flag_tree_combine_temps.
	(coalesce_vars): Either operand of a copy might not have a
	partition when rewriting a subset of the variables out of SSA form.
	(rewrite_vars_out_of_ssa): Honor -ftree-combine-temps by passing
	in SSANORM_COMBINE_TEMPS in flags argument to remove_sas_form..

2004-01-29  Dale Johannesen  <dalej@apple.com>

	* Makefile.in (OBJS-common):  Move tree-nomudflap.o...
	(OBJS-archive): ...to here, and remove duplicate tree-optimize.o.

2004-01-28  Richard Henderson  <rth@redhat.com>

	PR middle-end/13898
	* gimplify.c (gimplify_init_constructor): Invoke
	lhd_set_decl_assembler_name on the now-static variable.

2004-01-28  Richard Henderson  <rth@redhat.com>

	PR opt/13798
	* expr.c (is_zeros_p): Remove.  Change all callers to use
	initializer_zerop.
	(categorize_ctor_elements_1, categorize_ctor_elements): New.
	(count_type_elements): New.
	(mostly_zeros_p): Use them.
	* gimplify.c (tmp_var_id_num): Split out from create_tmp_var_raw.
	(create_tmp_var_name): Likewise.
	(gimplify_init_constructor): Drop constructors to readonly memory
	as indicated by categorize_ctor_elements and can_move_by_pieces.
	* tree.c (initializer_zerop): Handle VECTOR_CST.  Don't check
	AGGREGATE_TYPE_P for CONSTRUCTOR.
	* tree.h (categorize_ctor_elements): Declare.
	(count_type_elements): Declare.
	* Makefile.in (gimplify.o): Update dependencies.
	(GTFILES): Add gimplify.c.

2004-01-27  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mx_register_decls): Support VLAs.
	(mf_xform_derefs_1): Disable checking shortcut for VLAs.
	* c-simplify.c (gimplify_decl_stmt): Add mudflap xref comment.
	* gimplify.c (gimplify_bind_expr): Ditto.

2004-01-27  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c:  Add more comments describing SSAPRE and
	the various functions.
	(generate_expr_as_of_bb): Use PRED, a basic block argument, instead of
	j, the index of that bb.
	(generate_vops_as_of_bb): Ditto.
	(insert_occ_in_preorder_dt_order): Rename to
	create_and_insert_occ_in_preorder_dt_order.

2004-01-27  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (rename_1): Add some more comments.

2004-01-25  Andrew Pinski  <pinskia@physics.uc.edu>

	PR c/13748
	* c-decl.c (finish_function): Do not pass
	the function on to optimizers if there was an error.

2004-01-23  Richard Henderson  <rth@redhat.com>

	PR opt/12941
	* combine.c (SHIFT_COUNT_TRUNCATED): Provide default value.
	(simplify_comparison): Don't simplify (eq (zero_extract c 1 r) 0)
	if SHIFT_COUNT_TRUNCATED is set.

2004-01-21  Richard Henderson  <rth@redhat.com>

	PR c/11267
	* c-decl.c (c_finalize): New.
	(finish_function): Use it.  Genericize and finalize only non-nested
	functions.  Register nested functions with cgraph.
	* c-simplify.c: Include cgraph.h.
	(c_genericize): Genericize nested functions.
	* gimplify.c (gimplify_expr): Use DECL_SAVED_INSNS to access
	the struct function for the context.
	* Makefile.in (c-simplify.o): Update dependencies.

2004-01-21  Steven Bosscher  <stevenb@suse.de>

	PR opt/13767
	* tree-cfg.c (simple_goto_p): Remove NONLOCAL_LABEL check.

2004-01-21  Dale Johannesen  <dalej@apple.com>

	* tree-dfa.c: Fix comment.

2004-01-21  Richard Henderson  <rth@redhat.com>

	PR opt/13681
	* tree-ssa-operands.c (get_expr_operands): Handle (&x + c).

	* tree-ssa-ccp.c (maybe_fold_offset_to_component_ref): Handle
	flexible array members and lookalikes.

2004-01-21  Dale Johannesen  <dalej@apple.com>

	* tree-ssa-dom.c (cprop_into_stmt):  Add convert call
	to prevent type mismatches.

2004-01-21  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (load_modified_phi_result): PARM_DECL is okay
	to not have a defbb.
	(rename_1): Add a comment.

2004-01-21  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (find_equivalent_equality_comparison): Treat
	CONVERT_EXPRs just like NOP_EXPRs.
	(record_equivalences_from_stmt): Similarly.
	(thread_across_edge): Fix formatting goof.

	* tree-ssa-dom.c (thread_across_edge): Remove bogus restriction
	which prevents threading around to the top of a loop.

	* tree-ssa-dom.c (thread_across_edge): Handle SWITCH_EXPRs in the
	target block in addition to COND_EXPRs.

	* tree-ssa-dom.c (thread_across_edge): Create equivalences for
	PHIs before looking at the statements in the destination
	block.

2004-01-20  Roger Sayle  <roger@eyesopen.com>

	* fold-const.c (fold_convert): Rename to fold_convert_const.
	(fold_convert_const): Change arguments to take a tree_code,
	a type and the operand/expression to be converted.  Return
	NULL_TREE if no simplification is possible.  Add support for
	FIX_CEIL_EXPR and FIX_FLOOR_EXPR in addition to FIX_TRUNC_EXPR.
	(fold): Handle FIX_CEIL_EXPR and FIX_FLOOR_EXPR.
	Adjust call to fold_convert to match new fold_convert_const.
	Avoid modifying the tree passed to fold in-place.
	(nondestructive_fold_unary_to_constant): Likewise, simplify
	call to fold_convert to match new fold_convert_const.

2004-01-20  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-ander.c (andersen_op_assign): Update
	prototype. Make this handle &x in the operands using
	the addrargs parameter.
	(andersen_init): Turn off ip_partial until variables
	aliasing variables in other functions is resolved.
	(andersen_add_var): Use newly renamed alias_var_new_with_aterm.
	Fix comment.
	(andersen_add_var_same): Ditto.
	(andersen_function_call): Use ip_partial, not flag_unit_at_a_time.
	* tree-alias-common.c (get_values_from_constructor): Add bitmap
	and int * arguments. Used to mark operands that we are taking
	address of.
	(get_alias_var_decl): We should never see FIELD_DECL's right now.
	(intra_function_call): Reverse ordering for slightly faster
	projection merging.
	(find_op_of_decl): New function.
	(find_func_aliases): Use it.
	Comment x = foo.y case.
	Move get_alias_var_decl of arguments so we only call it if
	necessary.
	Handle address of arguments in operations.
	(create_fun_alias_var): tvar->var.
	Set context of fakeargs.
	Set context of fakedecls.
	Set DECL_PTA_ALIASVAR of RETURN_DECL's.
	(create_fun_alias_var_ptf): tvar->var.
	Set context of fakedecls.
	(create_alias_vars): Only create alias vars for globals
	with DECL_INITIAL's.
	* tree-alias-common.h (struct tree_alias_ops):
	Update op_assign arguments.
	(may_alias): Fix comment.
	(same_points_to_set): Ditto.
	(empty_points_to_set): Ditto.
	* tree-alias-type.h: Rename alias_tvar_new_with_aterm
	-> alias_var_new_with_aterm.
	* tree-alias-type.c: Ditto.

2004-01-20  Richard Henderson  <rth@redhat.com>

	* tree-sra.c (get_scalar_for_field): Validate field.
	(create_scalar_copies): Iterate over rhs fields too.

2004-01-19  Dale Johannesen  <dalej@apple.com>

	* params.def:  Add PARAM_MAX_CALLS_GLOBAL_VAR and
	PARAM_MAX_CLOBBERED_VARS_GLOBAL_VAR.
	params.h:  Ditto.
	tree-dfa.c:  Use them.
	doc/invoke.texi:  Document them.

2004-01-19  Jeff Law  <law@redhat.com>

	* tree-ssa.c (insert_phi_nodes_for): Always use fully pruned
	SSA form.

	* tree-flow.h: Update copyright dates.
	(register_new_def): Declare.
	* tree-ssa-dom.c: Update copyright dates.
	Add tracking of current definition of each program variable just
	like we do when rewriting into SSA form.
	(get_value_for, set_value_for): Handle either an SSA_NAME or
	regular variable.
	(tree_ssa_dominator_optimize): Initialize and update CURRDEFS.
	If we thread through a block with real statements, the destination
	of those statements must be rewritten too.
	(thread_across_edge): Skip nop statements at the start of a
	block.
	(dom_opt_initialize_block_local_data): Clear block_defs
	appropriately.
	(record_equivalences_from_phis): Accept walk_data structure.
	Call register_new_def appropriately.
	(optimize_stmt): Call register_new_defs_for_stmt.
	(dom_opt_finalize_block): Restore CURRDEFS appropriately.
	(register_new_definitions_for_stmt): New.
	* tree-ssa.c: Update copyright dates.
	(register_new_def): No longer static.  Accept additional argument
	for the table to hold the new definition.  Callers updated.

	* gimplify.c: Update copyright dates.
	* tree-cfg.c: Likewise.
	* tree.h: Likewise.

	* tree-iterator.c, tree-iterator.c: Use GCC rather than GNU CC.
	* tree-ssa-pre.c, tree-ssa-live.h: Likewise.

2004-01-19  Daniel Berlin  <dberlin@dberlin.org>

	* timevar.def (TV_TREE_SPLIT_EDGES): New timevar.
	* tree-ssa-pre.c (split_critical_edges): Move from here
	(pass_pre): Add PROP_no_crit_edges as required.
	* tree-cfg.c (split_critical_edges): to here.
	(pass_split_crit_edges): New pass.
	* tree-optimize.c (tree_optimization_passes): Add NEXT_PASS
	(split_crit_edges).
	* tree-pass.h: Add PROP_no_crit_edges.
	(pass_split_crit_edges): Declared.

2004-01-19  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mf_build_check_statement_for): Tolerate
	incoming locus NULL pointer.

2004-01-18  Richard Henderson  <rth@redhat.com>

	* builtins.c (simplify_builtin_strcpy): Export.  Take strlen argument.
	(simplify_builtin_strncpy, simplify_builtin_strcmp): Similarly.
	(simplify_builtin_strncmp): Similarly.
	(simplify_builtin): Update to match.
	* expr.h (simplify_builtin_strcmp, simplify_builtin_strncmp,
	simplify_builtin_strcpy, simplify_builtin_strncpy): Declare.
	* tree-pass.h (pass_fold_builtins): New.
	* tree-optimize.c (init_tree_optimization_passes): Add it.
	* tree-ssa-ccp.c (ccp_fold_builtin): Handle BUILT_IN_STRCPY,
	BUILT_IN_STRNCPY, BUILT_IN_STRCMP, BUILT_IN_STRNCMP.
	(get_strlen): Don't cast to size_t.
	(execute_fold_all_builtins, pass_fold_builtins): New.

2004-01-19  Jan Hubicka  <jh@suse.cz>

	PR opt/13729
	* cgraphunit.c (cgraph_finalize_compilation_unit): Fix memory leak.
	(cgraph_remove_unreachable_nodes):  Do not mix analyzed and
	DECL_SAVED_TREE flags.

2004-01-18  Richard Henderson  <rth@redhat.com>

	* tree-sra.c (REALPART_INDEX, IMAGPART_INDEX): Remove.
	(sra_candidates, needs_copy_in): Use a bitmap.  Update all users.
	(struct sra_elt, sra_elt_hash, sra_elt_eq): New.
	(sra_map_size): Remove.
	(sra_map): Use a htab_t.
	(lookup_scalar): Update to match.
	(get_scalar_for_field, get_scalar_for_complex_part): Likewise.
	(scalarize_structure_assignment): Use annotate_all_with_locus.
	(csc_build_component_ref): Remove index argument.
	(csc_build_complex_part): Take tree_code, not index.
	(create_scalar_copies): Don't collect indicies.
	(emit_scalar_copies): New.
	(scalarize_modify_expr, scalarize_tree_list): Use it.
	(scalarize_return_expr): Likewise.
	(scalarize_structures): Simplify needs_copy_in iteration.
	(scalarize_call_expr): Use annotate_all_with_locus.
	(dump_sra_map_trav): Split from ...
	(dump_sra_map): ... here.  Update for hash table.
	(tree_sra): Update for new datastructures.

2004-01-18  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (dump_function_to_file): Move ";; Function" header ...
	* tree-optimize.c (execute_one_pass): ... here.

2004-01-17  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c: s@_typevar@_var@g, s@_TVAR@_VAR@g,
	s@_TYPEVAR@_VAR@g
	* tree-alias-common.h: Ditto
	* tree.h: Ditto
	* tree-alias-ander.c: Ditto
	* tree-alias-type.c: Ditto
	* tree-alias-type.h: Ditto

2004-01-17  Richard Henderson  <rth@redhat.com>

	* tree-complex.c (gimplify_val): Copy TREE_BLOCK.

	* tree-complex.c (gimplify_val): New.
	(extract_component, do_binop, do_unop): Use it.

2004-01-17  Richard Henderson  <rth@redhat.com>

	* tree-complex.c (expand_complex_operations_1): Fix RETURN_EXPR
	thinko in last change.

2004-01-18  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* cfghooks.c (split_block): Don't redirect edges.
	* cfgrtl.c (rtl_split_block): Do it here.
	* tree-cfg.c (tree_split_block): Ditto.

2004-01-17  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (verify_expr): Tidy.  Check COND_EXPR for boolean
	condition.

2004-01-17  Jan Hubicka  <jh@suse.cz>

	PR optimization/11761
	* Makefile.in: Remove tree-simple.c from GTYized files.
	* tree-dfa.c (find_addressable_vars): Parse nontrivial ADDR_EXPRs.
	(discover_nonconstant_array_refs_r): New static function.
	(discover_nonconstant_array_refs): New global function.
	* tree-flow.h (discover_nonconstant_array_refs): Declare.
	* tree-simple.c (types_checked, types_in_memory): Kill.
	(struct_needs_to_live_in_memory): Kill.
	(needs_to_live_in_memory): aggregates are safe.
	* tree-ssa.c (rewrite_out_of_ssa): Call the new function.

2004-01-17  Richard Henderson  <rth@redhat.com>

	PR opt/13718
	* tree-complex.c (expand_complex_comparison): Handle COND_EXPR.
	(expand_complex_operations_1): Likewise.

2004-01-17  Richard Henderson  <rth@redhat.com>

	* tree-sra.c (scalarize_tree_list): Take bitmap argument to
	avoid emitting duplicates.  Update all callers.

2004-01-17  Richard Henderson  <rth@redhat.com>

	PR opt/13718
	* tree-complex.c (expand_complex_comparison): New.
	(expand_complex_operations_1): Handle EQ_EXPR and NE_EXPR.

2004-01-16  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c (get_alias_var): Handle BIT_FIELD_REF.
	(find_func_aliases): Ditto.
	Update for fact that basic component_refs are no longer
	is_gimple_variable.
	(create_fun_alias_var): Set DECL_CONTEXT on our faked declarations.
	(pass_del_pta): PTA dumps info on delete, so it needs a name.

2004-01-16  Steven Bosscher  <stevenb@suse.de>

	* tree-optimize.c (init_tree_optimization_passes): Run DCE
	before the first dominator optimization pass.

2004-01-15  Brian Booth <bbooth@redhat.com>
	    Richard Henderson  <rth@redhat.com>

	* tree-sra.c (REALPART_INDEX, IMAGPART_INDEX): New.
	(sra_map_size): New.
	(make_temp): New.
	(mark_all_vdefs): New.
	(is_sra_candidate_decl): New.
	(is_sra_candidate_ref): New.
	(lookup_scalar): Use sra_map_size, make_temp.
	(get_scalar_for_field): Rename from get_scalar_for.
	(get_scalar_for_complex_part): New.
	(can_be_scalarized_p): Handle COMPLEX_TYPE.
	(scalarize_component_ref): Handle REAL/IMAGPART_EXPR.
	(scalarize_structure_assignment): Tidy.
	(find_candidates_for_sra): Handle COMPLEX_TYPE, return bool.
	(csc_assign, csc_build_component_ref): Split out from ...
	(create_scalar_copies): ... here.  Handle COMPLEX_TYPE.
	(csc_build_complex_part): New.
	(scalarize_modify_expr): Use is_sra_candidate_foo.
	(scalarize_tree_list): Likewise.
	(scalarize_return_expr): Likewise.
	(dump_sra_map): Split out from ...
	(tree_sra): ... here.  Tidy.

2004-01-15  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mf_xform_derefs): Accept void return statements.

2004-01-15  Andrew MacLeod  <amacleod@redhat.com>
	    Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (remove_local_expressions_from_table): New function
	extracted from dom_opt_finalize_block.
	(restore_vars_to_originalvalue): Likewise.
	(extract_true_false_edges_from_block): Likewise.
	(thread_across_edge): Handle if (cond) too.
	(dom_opt_finalize_block): Use new functions.  Handle if (cond).

	* tree-ssa-dom.c (thread_across_edge): Accept dom_walk argument.
	Record temporary equivalences created by PHIs and temporarily
	const/copy propagate into conditionals.
	(dom_opt_finalize_block): Thread across an edge to a dominated block
	if the dominated block has PHIs.  Remove temporary equivalenecs
	created by PHIs in thread_across_edge.  Update code to restore the
	various hash tables to use the actual varray rather than a local
	copy of the varray.
	(simplify_rhs_and_lookup_avail_expr): Set the condition's code
	before settings its operands.

	* tree-ssa.c (create_temp): Use add_referenced_var rather than
	an incomplete inline of its behavior.  Also make sure to
	set is_dereferenced_{load,store}, is_call_clobbered and is_stored.

	* tree-ssa-live.c (build_tree_conflict_graph): Correctly handle
	case where the result of a PHI is unused.

2004-01-15  Diego Novillo  <dnovillo@redhat.com>

	* cfghooks.c (predicted_by_p): Add missing return.

2004-01-15  Richard Henderson  <rth@redhat.com>

	* tree-ssa-dom.c (optimize_stmt): Dump new statement if
	folding succeeded.

2004-01-15  Kazu Hirata  <kazu@cs.umass.edu>

	* tree-cfg.c: Fix comment typos.
	* tree-eh.c: Likewise.
	* tree-inline.c: Likewise.
	* tree-optimize.c: Likewise.
	* tree-ssa.c: Likewise.
	* tree-ssa-dom.c: Likewise.
	* tree-ssa-operands.c: Likewise.
	* tree-ssa-pre.c: Likewise.
	* tree-tailcall.c: Likewise.

2004-01-14  Jan Hubicka  <jh@suse.cz>

	* basic-block.h: Include predict.h
	(tree_predicted_by_p, rtl_predicted_by_p,  rtl_predict_edge,
	predict_edge_def): Declare.
	* cfghooks.h (cfg_hooks): add predict_edge and predicted_by_p
	(predict_edge, predicted_by_p): Declare.
	* cfghooks.c (predict_edge, predicted_by_p): Declare.
	* cfgrtl (rtl_cfg_hooks, cfg_layout_rtl_cfg_hook): Add new hooks.
	* cse.c (struct cse_basic_block_data): Rename enum values to not
	conflict with profile.h; update all uses.
	* predict.c:  Include tree-flow.h, ggc.h, tree-dump.h
	(predicted_by_p): Rename to ...
	(rtl_predicted_by_p): .. this one; make global
	(tree_predicted_by_p): New.
	(dump_prediction): Add FILE argument.
	(predict_edge): Rename to ...
	(rtl_predict_edge): .. this one.
	(tree_predict_edge): New.
	(combine_predictions_for_insn): Update calls of predict_edge.
	(predict_loops): Break out from ...
	(estimate_probability): ... here; update comments; move updating
	of unknown probabilities from ...
	(estimate_bb_frequencies): ... here.
	(combine_predictions_for_bb): New.
	(tree_predict_by_opcode): New.
	(tree_estimate_probability): New.
	* predict.def (PRED_TREE_POINTER, PRED_TREE_OPCODE_POSITIVE,
	PRED_TREE_OPCODE_NONEQUAL, PRED_TREE_FPOPCODE): New predictors.
	* predict.h: Add include guard.
	(predict_edge, predict_edge_def): Move prototypes to basic_block.h
	* tree-cfg.c (tree_cfg_hooks): Add prediction hooks.
	* tree-dump.c (dump_files): Add profile.
	* tree-flow.h (struct edge_prediction): New structure.
	(struct bb_ann_d): Add field predictions.
	(tree_estimate_probability): Declare.
	* tree-optimize.c (optimize_function_tree): Call tree_estimate_probability.
	* tree.h (tree_dump_index): Add TDI_profile.
	* tree-pass.h (pass_profile): Declare.

2004-01-14  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* basic-block.h (find_basic_blocks, cleanup_cfg,
	delete_unreachable_blocks, merge_seq_blocks): Declare.
	* cfgcleanup.c (merge_seq_blocks): New.
	* output.h (find_basic_blocks, cleanup_cfg, delete_unreachable_blocks):
	Declarations moved to basic-block.h.
	* tree-cfg.c (tree_merge_blocks, tree_can_merge_blocks_p): New.
	(cleanup_tree_cfg): Call merge_seq_blocks.
	(tree_cfg_hooks): Add tree_can_merge_blocks_p and tree_merge_blocks.

2004-01-14  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (tree_make_forwarder_block): Fix.

2004-01-14  Richard Henderson  <rth@redhat.com>

	* tree-complex.c: New file.
	* Makefile.in (OBJS-common): Add it.
	* tree-pass.h (pass_lower_complex): New.
	* tree-optimize.c (init_tree_optimization_passes): Add it.

2004-01-14  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* Makefile.in (tree-ssa-loop.o): Add cfgloop.h dependency.
	(cfghooks.o): Add TIMEVAR_H and toplev.h dependency.
	* basic-block.h (struct edge_def): Use ir_type instead testing of
	cfg_hooks directly.
	(tidy_fallthru_edge, tidy_fallthru_edges, dump_bb, verify_flow_info):
	Declaration removed.
	* cfg.c (verify_flow_info, dump_bb): Moved to cfghooks.c.
	* cfgcleanup.c (try_simplify_condjump): Changed due to change of
	tidy_fallthru_edge.
	* cfghooks.c: Include timevar.h and toplev.h.
	(cfg_hooks): Made static.
	(tree_register_cfg_hooks, ir_type): New.
	(verify_flow_info, dump_bb): Moved from cfg.c.
	(redirect_edge_and_branch, redirect_edge_and_branch_force,
	split_block, split_block_after_labels, move_block_after,
	delete_basic_block, split_edge, create_basic_block,
	create_empty_bb, can_merge_blocks_p, merge_blocks,
	make_forwarder_block, tidy_fallthru_edge, tidy_fallthru_edges): New.
	* cfghooks.h (struct cfg_hooks): Modified.
	(redirect_edge_and_branch, redirect_edge_and_branch_force, split_block,
	delete_basic_block, split_edge, create_basic_block, can_merge_blocks_p,
	merge_blocks, make_forwarder_block): Changed into functions.
	(loop_optimizer_init, loop_optimizer_finalize): Removed.
	(HEADER_BLOCK, LATCH_EDGE): Moved into cfgloop.c.
	(tidy_fallthru_edge, tidy_fallthru_edges, create_empty_bb,
	verify_flow_info, dump_bb, ir_type): Declare.
	(cfg_layout_rtl_cfg_hooks): Declare.
	* cfglayout.c (copy_bbs): Don't call add_to_dominance_info.
	* cfgloop.c (HEADER_BLOCK, LATCH_EDGE): Moved from cfghooks.h.
	(update_latch_info, mfb_keep_just, mfb_keep_nonlatch): New functions.
	(canonicalize_loop_headers): Use new semantics of make_forwarder_block.
	* cfgloop.h (rtl_loop_optimizer_init, rtl_loop_optimizer_finalize):
	Removed.
	(loop_optimizer_init, loop_optimizer_finalize): Declare.
	* cfgloopmanip.c (split_loop_bb): Don't update dominators.
	(remove_bbs): Don't call remove_bbs.
	(create_preheader): Use make_forwarder_block.
	(mfb_keep_just, mfb_update_loops): New static functions.
	* cfgrtl.c (cfg_layout_split_block, rtl_split_block,
	rtl_make_forwarder_block, rtl_create_basic_block,
	rtl_delete_block, rtl_split_block, rtl_merge_blocks,
	tidy_fallthru_edge, rtl_split_edge, cfg_layout_merge_blocks,
	cfg_layout_split_edge): Parts not specific to rtl moved to cfghooks.c
	(tidy_fallthru_edges): Moved to cfghooks.c.
	(rtl_move_block_after): New.
	(redirect_edge_with_latch_update, update_cfg_after_block_merging):
	Removed.
	(rtl_cfg_hooks, cfg_layout_rtl_cfg_hooks): Modified.
	* ifcvt.c (merge_if_block, find_cond_trap, find_if_case_1,
	find_if_case_2): Don't update dominators.
	* loop-init.c (rtl_loop_optimizer_init, rtl_loop_optimizer_finalize):
	Replaced by rtl_loop_optimizer_init and rtl_loop_optimizer_finalize.
	* loop-unswitch.c (unswitch_loop): Don't call add_to_dominance_info.
	* toplev.c (rest_of_handle_loop2): Enter cfglayout mode here.
	* tree-cfg.c (create_bb): Modified to suit create_basic_block hook.
	(tree_redirect_edge_and_branch_1): Merged into
	tree_redirect_edge_and_branch.
	(create_blocks_annotations): Removed.
	(tree_loop_optimizer_init, tree_loop_optimizer_finalize): Removed.
	(tree_make_forwarder_block, remove_bb, tree_split_edge,
	tree_redirect_edge_and_branch, tree_split_block,
	tree_move_block_after): Partially moved to cfghooks.c.
	(tree_duplicate_bb): New.
	(PENDING_STMT): Moved to tree-flow.h.
	(tree_register_cfg_hooks): Moved to cfghooks.c.
	(build_tree_cfg): Don't call create_blocks_annotations.
	(factor_computed_gotos, make_blocks): Use create_empty_bb.
	(cleanup_tree_cfg): Use delete_unreachable_blocks.
	(remove_unreachable_blocks, insert_bb_before): Removed.
	(remove_phi_nodes_and_edges_for_unreachable_block): Modified.
	(tree_find_edge_insert_loc, thread_jumps): Use cfg hooks.
	(bsi_commit_edge_inserts): Update_annotations argument removed.
	(tree_cfg_hooks): Modified.
	* tree-flow.h (PENDING_STMT): Moved from tree-cfg.c.
	(insert_bb_before, remove_unreachable_blocks,
	remove_phi_nodes_and_edges_for_unreachable_block, tree_split_edge):
	Declaration removed.
	(bsi_commit_edge_inserts): Declaration changed.
	(tree_duplicate_bb): Declare.
	* tree-sra.c (scalarize_structures): Changed due to
	bsi_commit_edge_inserts change.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Use
	delete_unreachable_blocks.
	* tree-ssa-loop.c: Include cfgloop.h.
	* tree-ssa-pre.c (split_critical_edges, tree_perform_ssapre): Use cfg
	hooks.
	* tree-ssa.c (rewrite_trees, rewrite_vars_out_of_ssa): Changed due to
	bsi_commit_edge_inserts change.
	(ssa_redirect_edge): Record the phi arguments on the redirected edge.
	* tree-tailcall.c (eliminate_tail_call): Clean stored phi arguments.

2004-01-13  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_lhs_complex_part_expr): Remove.
	(gimplify_modify_expr): Don't call it.

	* tree-alias-common.c (HAVE_BANSHEE): Make sure it's defined.
	(pass_build_pta): Set name.

2004-01-13  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-tailcall.c (eliminate_tail_call): Add phi nodes for the call
	vdefs.
	(find_tail_calls): Ignore returns with virtual operands.

2004-01-12  Richard Henderson  <rth@redhat.com>

	* tree-pass.h: New file.
	* gimple-low.c: Include tree-pass.h.
	(lower_function_body): Make static, take no arguments.  Set
	dont_emit_block_notes and call reset_block_changes here.
	(pass_lower_cf): New.
	* toplev.c (general_init): Call init_tree_optimization_passes.
	* toplev.h (init_tree_optimization_passes): Declare.
	* tree-alias-ander.c: Include tree-pass.h.
	(tree_dump_file, tree_dump_flags): Remove.
	(andersen_init): Don't dump_begin.
	(andersen_cleanup): Don't dump_end.
	* tree-alias-common.c: Include tree-pass.h, timevar.h.
	(currptadecl): Remove.
	(create_alias_vars): Make static, take no args.  Tidy ifdefs.
	(delete_alias_vars): Likewise.  Protect vs PTA_ANDERSEN.
	(pass_build_pta, pass_del_pta): New.
	* tree-alias-common.h (create_alias_vars): Delete decl.
	(delete_alias_vars): Likewise.
	* tree-cfg.c: Include tree-pass.h.
	(tree_dump_file, tree_dump_flags): Remove.
	(build_tree_cfg): Don't timevar, do init_flow.  Ensure one bb.
	Don't dump the function here.
	(execute_build_cfg, pass_build_cfg): New.
	(remove_useless_stmts): Make static, take no arguments.
	(pass_remove_useless_stmts): New.
	(remove_bb): Don't open the dump file.
	* tree-dfa.c: Include tree-pass.h.
	(tree_dump_file, tree_dump_flags): Remove.
	(find_referenced_vars): Make static, take no args.  Do init_tree_ssa.
	(compute_may_aliases): Similarly.  Don't timevar or open dump file.
	Don't delete_alias_vars here.
	(pass_referenced_vars, pass_may_alias): New.
	* tree-dump.c (dump_files): Remove optimization dumps.
	(extra_dump_files, extra_dump_files_in_use): New.
	(extra_dump_files_alloced): New.
	(dump_register): New.
	(get_dump_file_info): New.
	(dump_begin, dump_enabled_p, dump_flag_name): Use it.
	(dump_enable_all): Handle extra_dump_files.
	(dump_switch_p_1): Split out from dump_switch_p.
	(dump_switch_p): Handle extra_dump_files.
	* tree-dump.h (dump_register): Declare.
	* tree-eh.c: Include tree-pass.h
	(lower_eh_constructs): Make static, take no args.  Don't timevar,
	don't dump function.
	(pass_lower_eh): New.
	* tree-flow.h (remove_useless_stmts, find_referenced_vars,
	compute_may_aliases, lower_function_body, rewrite_out_of_ssa,
	tree_ssa_ccp, tree_ssa_dominator_optimize, tree_ssa_dce,
	tree_ssa_loop_opt, lower_eh_constructs, tree_sra): Remove.
	(rewrite_into_ssa): Update decl.
	* tree-mudflap.c: Include tree-pass.h.
	(mudflap_function_decls): Make static, take no args, don't process
	functions with mf_marked_p.
	(mudflap_function_ops): Likewise.
	(gate_mudflap, pass_mudflap_1, pass_mudflap_2): New.
	(mudflap_enqueue_decl): Don't open dump file.
	(mudflap_enqueue_constant): Likewise.
	* tree-nomudflap.c: Include tree-pass.h.
	(mudflap_c_function_decls, mudflap_c_function_ops): Remove.
	(pass_mudflap_1, pass_mudflap_2): New.
	* tree-optimize.c: Include tree-pass.h.
	(optimize_function_tree): Remove.
	(tree_dump_file, tree_dump_flags, vars_to_rename): New.
	(all_passes): New.
	(execute_gimple, pass_gimple): New.
	(execute_rebuild_bind, pass_rebuild_bind): New.
	(gate_all_optimizations, pass_all_optimizations): New.
	(execute_del_cfg, pass_del_cfg): New.
	(register_one_dump_file, register_dump_files): New.
	(dup_pass_1, init_tree_optimization_passes): New.
	(current_properties, last_verified): New.
	(execute_todo, execute_one_pass, execute_pass_list): New.
	(tree_rest_of_compilation): Remove -O0 passes.
	* tree-sra.c: Include tree-pass.h, flags.h.
	(tree_dump_file, tree_dump_flags, vars_to_rename): Remove.
	(tree_sra): Make static, take no args.  Don't timevar or dump file.
	(gate_sra, pass_sra): New.
	* tree-ssa-ccp.c: Include tree-pass.h, flags.h.
	(tree_dump_file, tree_dump_flags): New.
	(tree_ssa_ccp): Make static, take no args.  Don't timevar or dump file.
	(gate_ccp, pass_ccp): New.
	(substitute_and_fold): Take no args.
	* tree-ssa-dce.c: Include tree-pass.h, flags.h.
	(tree_dump_file, tree_dump_flags): New.
	(tree_ssa_dce): Make static, take no args.  Don't open dump file.
	(gate_dce, pass_dce): New.
	* tree-ssa-dom.c: Include tree-pass.h, flags.h.
	(tree_dump_file, tree_dump_flags, vars_to_rename): Remove.
	(tree_ssa_dominator_optimize): Make static, take no args, don't
	timevar, don't dump file.
	(gate_dominator, pass_dominator): New.
	* tree-ssa-loop.c: Include tree-pass.h, flags.h.
	(tree_dump_file, tree_dump_flags): Remove.
	(tree_ssa_loop_opt): Make static, take no args, don't open dump file.
	(gate_loop, pass_loop): New.
	* tree-ssa-pre.c: Include tree-pass.h, flags.h.
	(tree_dump_file, tree_dump_flags): Remove.
	(execute_pre): Rename from tree_perform_ssapre, make static,
	take no args, don't timevar, don't open dump file, don't allocate
	vars_to_rename.
	(gate_pre, pass_pre): New.
	* tree-ssa.c: Include tree-pass.h.
	(tree_dump_file, tree_dump_flags, vars_to_rename): Remove.
	(rewrite_into_ssa): Take no arguments, don't open dump file.
	(rewrite_out_of_ssa): Make static, take no args, don't timevar,
	don't open dump file.  Disable TER if mudflap.
	(pass_build_ssa, pass_del_ssa): New.
	* tree-tailcall.c: Include tree-pass.h, flags.h.
	(tree_dump_file, tree_dump_flags): Remove.
	(tree_optimize_tail_calls_1): Rename from tree_optimize_tail_calls.
	Make static, take only opt_tailcalls, don't dump file.
	(execute_tail_recursion, gate_tail_calls, execute_tail_calls): New.
	(pass_tail_recursion, pass_tail_calls): New.
	* tree.h (enum tree_dump_index): Remove optimization dumps.
	* Makefile.in (tree-alias-ander.o, tree-alias-common.o, tree-ssa.o,
	tree-ssa-dom.o, tree-ssa-pre.o, tree-cfg.o, tree-tailcall.o,
	tree-dfa.o, tree-eh.o, tree-ssa-loop.o, tree-optimize.o, gimple-low.o,
	tree-mudflap.o, tree-ssa-dce.o, tree-ssa-ccp.o, tree-sra.o: Update
	dependencies.

2004-01-12  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mf_xform_derefs): Restore instrumentation of
	RETURN_EXPRs.

2004-01-11  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (remove_usless_stmts_cond):  Fold statement.
	(remove_useless_stmts_1):  Fold trees we know how to fold.

2004-01-09  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_constructor): Merge into ...
	(gimplify_init_constructor): ... here.  Handle COMPLEX_TYPE and
	VECTOR_TYPE.
	(gimplify_lhs_complex_part_expr): New.
	(gimplify_modify_expr): Call it.
	* tree-simple.c (is_gimple_rhs): Accept COMPLEX_EXPR.
	* c-pretty-print.c (pp_c_initializer): Accept any type CONSTRUCTOR.
	(pp_c_initializer_list): Fix code expectations for VECTOR_TYPE and
	COMPLEX_TYPE.

2004-01-09  Steven Bosscher  <stevenb@suse.de>

	PR optimization/13599
	* tree-cfg.c (remove_useless_stmts_cond): Clear last-goto
	before returning.

2004-01-09  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_asm_expr): Fix ordering of ASM_INPUTS.

2004-01-09  Jan Hubicka  <jh@suse.cz>

	* cgraph.h (cgraph_clone_inlined_nodes): Declare.
	* cgraphunit.c (cgrpah_clone_inlined_nodes): Make global.
	(cgraph_mark_inline_edge): Sanity check that size is positive.
	(cgraph_decide_inlining): Fix typo.
	* tree-optimize.c (tree_rest_of_compilation): Fix node duplication
	code.

2004-01-09  Jan Hubicka  <jh@suse.cz>

	* tree-inline.c (estimate_num_insns_1): Fix.

2004-01-09  Richard Henderson  <rth@redhat.com>

	* tree-alias-ander.c, tree-cfg.c, tree-dfa.c, tree-mudflap.c,
	tree-sra.c, tree-ssa-ccp.c, tree-ssa-dce.c, tree-ssa-dom.c,
	tree-ssa-loop.c, tree-ssa-pre.c, tree-ssa.c, tree-tailcall.c: Rename
	dump_file and dump_flags to tree_dump_file/flags.

2004-01-08  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mf_build_string): Properly mf_mark string.
	(mf_varname_tree): Remove redundant marking.
	* tree-optimize.c (tree_rest_of_compilation): Skip mudflap processing
	of mf_marked functions.
	* c-mudflap.c (mflang_flush_calls): mf_mark synthetic function.

2004-01-07  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (OBJS-common): Remove tree-must-alias.o
	(tree-must-alias.o): Remove.
	* common.opt (ftree-must-alias): Remove.
	* flags.h (flag_tree_must_alias): Remove.  Update all users.
	* timevar.def (TV_TREE_MUST_ALIAS): Remove.
	* toplev.c (f_options): Remove entry for -ftree-must-alias.
	* tree-alias-common.c (local_alias_vars): Add GTY marker.
	(local_alias_varnums): Likewise.
	* tree-dfa.c (aliases_computed_p): Declare.
	(dump_variable): Show variable UID and dereferenced bits.
	(compute_may_aliases): Add arguments 'vars_to_rename' and 'phase'.
	Do not call create_alias_vars.
	Call promote_call_clobbered_vars
	Do debugging dumps.
	Set 'aliases_computed_p' to true before returning.
	(create_memory_tags): Call may_be_aliased.
	Mark new memory tags for renaming.
	(compute_alias_sets): Don't do debugging dumps.
	(find_variable_in): Move from tree-must-alias.c
	(remove_element_from): Likewise.
	(find_addressable_vars): Likewise
	(promote_call_clobbered_vars): New.
	(get_memory_tag_for): Mark the tag volatile if the pointed-to type
	is volatile.
	* tree-dump.c (dump_files): Remove entry for tree-mustalias.
	Add entries for tree-ssa7, tree-dom3 and tree-dce3.
	* tree-flow-inline.h (may_be_aliased): New.
	* tree-flow.h (may_be_aliased): Declare.
	(aliases_computed_p): Declare.
	(tree_compute_must_alias): Remove.
	* tree-must-alias.c: Remove.
	* tree-optimize.c: Include tree-alias-common.h.
	(optimize_function_tree): Call create_alias_vars before going into
	SSA form.
	Do not compute aliases until after the first DOM and DCE passes.
	Run DOM and DCE once more after computing may-aliases.
	* tree-ssa-dom.c (propagate_copy): Merge the dereferenced bit flags
	when copy propagating pointers.
	* tree-ssa-operands.c (get_stmt_operands): Assume that the
	statement has no volatile operands.
	(get_expr_operands): When processing an INDIRECT_REF expressions,
	mark the statement as having volatile operands if aliases have not
	been computed.
	(add_stmt_operand): If the variable may be aliased and aliasing has
	not been computed yet, mark the statement as having volatile
	operands.
	* tree-ssa.c (init_tree_ssa): Set aliases_computed_p to false.
	(delete_tree_ssa): Likewise.
	* tree.h (tree_dump_index): Remove TDI_mustalias.
	Add TDI_dom_3, TDI_ssa_7 and TDI_dce_3.
	* doc/invoke.texi: Remove must-alias documentation.

2004-01-07  Jeff Law  <law@redhat.com>

	* tree-ssa-dce.c (find_useful_stmts): Do not consider PHIs for
	virtual operands inherently necessary.

2004-01-07  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-dfa.c (free_df_for_stmt, free_df): New functions.
	(compute_immediate_uses_for_stmt): Record uses in VDEFs.
	* tree-flow.h (free_df, kill_redundant_phi_nodes): Declare.
	* tree-optimize.c (optimize_function_tree): Call
	kill_redundant_phi_nodes.
	* tree-ssa-ccp.c (finalize): Call free_df.
	* tree-ssa.c (replace_immediate_uses, raise_value,
	kill_redundant_phi_nodes): New functions.

2004-01-06  Jeff Law  <law@redhat.com>

	* tree.h (FUNCTION_RECEIVES_NONLOCAL_GOTO): Kill.
	* tree-cfg.c (make_exit_edges, is_ctrl_altering_stmt):  Use
	current_function_has_nonlocal_label instead of
	FUNCTION_RECEIVES_NONLOCAL_GOTO.
	* gimplify.c (gimplify_expr): Set has_nonlocal_label in the
	appropriate function's struct function rather than setting
	a bit in the FUNCTION_DECL.

2004-01-06  Jan Hubicka  <jh@suse.cz>

	* expr.c (string_constant): Recognize array_ref.

2004-01-06  Richard Henderson  <rth@redhat.com>

	* builtins.c (builtin_save_expr): New.
	(expand_builtin_mathfn, expand_builtin_mathfn_2,
	expand_builtin_strcmp, expand_builtin_strncmp,
	expand_builtin_strcat, fold_builtin_cabs): Use it.

2004-01-06  Jan Hubicka  <jh@suse.cz>

	* fold-const.c (fold): Do not rebuild comparison when nothing
	changed.

2004-01-05  Jan Hubicka  <jh@suse.cz>

	* tree-ssa-ccp.c (ccp_fold_builtin): Return early for builtins
	taking no arugment.

2004-01-05  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-ssa-dce.c: Clean up whitespace.

	* tree-cfg.c (tree_verify_flow_info): Fix complaint about
	missing or wrong labels in the targets of a conditional branch.

2004-01-05  Richard Henderson  <rth@redhat.com>

	* tree-ssa-dom.c (record_equivalences_from_incoming_edge): Check
	for signed zeros before recording value.
	* Makefile.in (tree-ssa-dom.o): Depend on real.h.

2004-01-05  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (cprop_into_stmt): Remove hack which prevented
	copy propagation into statements with virtual operands, but no
	real operands.

	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Correctly handle
	the case where an edge we wish to redirect is split by the out of SSA
	code.

2004-01-05  Richard Henderson  <rth@redhat.com>

	* c-tree.h (struct lang_type): Add enum_min, enum_max.
	* c-decl.c (finish_enum): Set them.  Set TYPE_MIN/MAX_VALUE to
	the limits of the compatible type, not to the enumerators.
	(check_bitfield_type_and_width): Use them.
	(finish_struct): Clear allocated struct lang_type.
	* gimplify.c (gimplify_switch_expr): Remove special handling of
	outer cast in a switch.
	* tree-ssa-dom.c (record_equivalences_from_incoming_edge): Likewise.

2004-01-05  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (added_phis): Removed.
	Remove gt-tree-ssa-pre.h.
	(process_left_occs_and_kills): ASM_EXPR's block load pre.

	* Makefile.in (GTFILES): Don't process tree-ssa-pre.c.
	gt-tree-ssa-pre.h isn't a gtfile anymore.

2004-01-05  Andrew Pinski  <pinskia@physics.uc.edu>

	* config.gcc (powerpc-*-darwin*): Make libbanshee rebuild
	on PPC darwin.

2004-01-05  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_expr): Move check for error_mark inside
	the main loop.

2004-01-04  Jan Hubicka  <jh@suse.cz>

	* Makefile.in (cgraph.o, cgraphunit.o): Add intl.h dependency.
	* cgraph.c (create_edge, dump_cgraph): Update to use inline_failed
	* cgraph.h (cgraph_edge): Replace inline_call by inline_failed
	(cgraph_inline_p): Add extra argument reason.
	* cgraphunit.c: Minor formating fixes.
	cgraph_first_inlined_callee): New functions.
	(record_call_1): Record builtins too.
	(cgraph_analyze_function): Update inline_failed messages.
	(cgraph_mark_functions_to_output, cgraph_expand_function, cgraph_inlined_into,
	cgraph_inlined_callees, cgraph_estimate_growth): Update to use inline_failed.
	(cgraph_check_inline_limits): Likewise; Add argument reason.
	(cgraph_set_inline_failed): New static function.
	(cgraph_decide_inlining_of_small_function, cgraph_decide_inlining): Set
	reasons.
	(cgraph_inline_p): Add new argument reason.
	* tree-inline.c (expand_call_inline):  Update warning.

2004-01-04  Andreas Jaeger  <aj@suse.de>

	* common.opt: Re-order some options in ASCII collating orders.

2004-01-03  Richard Henderson  <rth@redhat.com>

	* toplev.c (rest_of_compilation): Fixup merge error wrt
	check_function_return_warnings.

	* tree.h (FUNCTION_RECEIVES_NONLOCAL_GOTO): Use unsigned_flag.

2004-01-02  Jan Hubicka  <jh@suse.cz>

	* c-decl.c (duplicate_decls):  Output DIE of extern inline function
	only when it can be inlined.
	* c-objc-common.c (c_disregard_inline_limits):  When not inlining
	extern inline functions do not disregard.
	* cgraphunit.c (cgraph_analyze_function): When not inlining do not set
	inline.
	(cgraph_decide_inlining): Limit work done when not inlining.
	(cgrpah_decide_inlining_incrementally): Likewise.
	* tree-optimize.c (tree_rest_of_compilation): Do not call
	optimize_inline_calls
	when there is nothing to inline.

2004-01-01  Richard Henderson  <rth@redhat.com>

	* c-common.c (c_expand_expr): Don't handle STMT_EXPR.
	* c-objc-common.c (c_objc_common_finish_file): Use expand_expr.
	* c-semantics.c (lang_expand_stmt, lang_expand_decl_stmt,
	expand_cond, genrtl_do_pushlevel, genrtl_goto_stmt, genrtl_expr_stmt,
	genrtl_expr_stmt_value, genrtl_decl_stmt, genrtl_if_stmt,
	genrtl_while_stmt, genrtl_do_stmt_1, genrtl_do_stmt,
	genrtl_return_stmt, genrtl_for_stmt, genrtl_break_stmt,
	genrtl_continue_stmt, genrtl_scope_stmt, genrtl_switch_stmt,
	genrtl_case_label, genrtl_compound_stmt, genrtl_asm_stmt,
	genrtl_cleanup_stmt, expand_stmt, find_reachable_label,
	find_reachable_label_1, expand_unreachable_if_stmt,
	expand_unreachable_stmt): Remove.
	* c-common.h: Update.

2003-12-31  Richard Henderson  <rth@redhat.com>

	* c-mudflap.c (mflang_register_call): Remove.
	(mflang_flush_calls): Use start_function/finish_function.
	* tree-mudflap.c (mf_init_extern_trees): Tidy.
	(mf_decl_cache_locals): Fix chaining for empty body.
	(deferred_static_decl_labels): Remove.
	(deferred_static_decls_init): Remove.
	(mudflap_register_call): New.
	(mudflap_enqueue_decl): Use it.  Remove label argument.
	(mudflap_enqueue_constant): Likewise.
	(mudflap_finish_file): Update to match.
	* tree-mudflap.h (mudflap_enqueue_decl): Remove label argument.
	(mudflap_enqueue_constant): Likewise.
	(mflang_register_call): Remove.
	* tree-nomudflap.c (mudflap_enqueue_decl): Remove label argument.
	(mudflap_enqueue_constant): Likewise.
	* tree-optimize.c (tree_ssa_finish): Don't create NULL bodies.
	* varasm.c (make_decl_rtl): Update mudflap_enqueue_decl call.
	(output_constant_def_contents): Similarly for mudflap_enqueue_constant.

2003-12-26  Sebastian Pop  <s.pop@laposte.net>

	* tree-cfg.c (print_loop, print_pred_bbs, print_succ_bbs,
	debug_loop_ir, print_loop_ir): New.
	* tree-flow.h (debug_loop_ir, print_loop_ir): Declare.

2003-12-23  Jeff Law  <law@redhat.com>

	* tree-cfg.c (tree_find_edge_insert_loc): Do not use the target
	block as an insertion location if the target block has PHI nodes.

2003-12-23  Jan Hubicka  <jh@suse.cz>

	* cgraphunit.c (cgraph_mark_inline): Accept argument edge; return
	next edge not redirected.
	(cgraph_recursive_inlining_p): Simplify.
	(cgraph_decide_inlining*): Update calls of cgraph_mark_inline.

2003-12-22  Toon Moene  <toon@moene.indiv.nluug.nl>

	* tree-alias-common.c (find_func_aliases): Do not call
	intra_function_call for languages assuring no aliasing between
	arguments (by themselves) and global memory.

2003-12-21  Jan Hubicka  <jh@suse.cz>

	* tree-ssa-ccp.c (fold_stmt): Return when there is no RHS
	(get_rhs): Return for RETURN_EXPR with no operand.

2003-12-21  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (tree_make_forwarder_block): Use split_block.
	(tree_split_block): New.
	(tree_cfg_hooks): Add tree_split_block.
	(tree_loop_optimizer_init):  Enable force_single_succ_latches.
	* cfgloopmanip.c (loop_split_edge_with): Don't update dominators.
	* cfgrtl.c (rtl_split_edge, cfg_layout_split_edge): Update dominators.

2003-12-19  Daniel Berlin  <dberlin@dberlin.org>

	* tree-dfa.c (alias_stats_d): New structure.
	(alias_stats): New variable.
	(create_memory_tags): Zero out alias_stats.
	(dump_alias_stats): New function.
	(compute_alias_sets): Call it if TDF_STATS is set.
	(may_alias_p): Collect the various statistics.

2003-12-19  Diego Novillo  <dnovillo@redhat.com>

	* gimple-low.c (expand_var_p): Always expand volatiles.
	* tree-dfa.c (find_referenced_vars): Move up in the file.
	(create_memory_tags): New local function.
	(compute_may_aliases): Call it.
	(add_referenced_var): Move code to create memory tags and create
	aliasing arrays to create_memory_tags.
	(get_memory_tag_for): Don't mark memory tags volatile.  Mark them
	addressable.
	* tree-flow.h (var_ann_d): Add bitfields is_dereferenced_store and
	is_dereferenced_load.
	(add_call_clobbered_var): Remove.
	* tree-ssa-operands.c (check_optype_freelist): Mark arguments
	unused.
	(add_optype_freelist): Likewise.
	(add_stmt_operand): Don't add operands for volatile variables.

2003-12-19  Kazu Hirata  <kazu@cs.umass.edu>

	* dominance.c: Fix comment typos.
	* et-forest.c: Likewise.
	* et-forest.h: Likewise.
	* tree-cfg.c: Likewise.
	* tree-eh.c: Likewise.
	* tree-mudflap.c: Likewise.
	* tree-optimize.c: Likewise.
	* tree-pretty-print.c: Likewise.
	* tree-ssa-ccp.c: Likewise.
	* tree-ssa-dom.c: Likewise.
	* tree-ssa.c: Likewise.
	* tree-tailcall.c: Likewise.
	* tree.def: Likewise.
	* tree.h: Likewise.

2003-12-18  Jason Merrill  <jason@redhat.com>

	PR c++/12453
	* c-simplify.c (stmt_expr_last_stmt): Split out from...
	(gimplify_stmt_expr): Here.
	* c-common.h: Declare it.

2003-12-18  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* et-forest.h (et_forest_create, et_forest_delete,
	et_forest_add_node, et_forest_add_edge, et_forest_remove_node,
	et_forest_remove_edge, et_forest_parent,
	et_forest_common_ancestor, et_forest_node_value,
	et_forest_enumerate_sons): Declarations removed.
	(struct et_node): New.
	(et_new_tree, et_free_tree, et_set_father, et_split, et_nca,
	et_below): Declare.
	* et-forest.c (struct et_forest_occurrence, struct et_forest,
	struct et_forest_node): Removed.
	(et_forest_create, et_forest_delete,
	et_forest_add_node, et_forest_add_edge, et_forest_remove_node,
	et_forest_remove_edge, et_forest_parent,
	et_forest_common_ancestor, et_forest_node_value,
	et_forest_enumerate_sons, splay, remove_all_occurrences,
	find_leftmost_node, find_rightmost_node, calculate_value): Removed.
	(struct et_occ): New.
	(et_nodes, et_occurences): New.
	(set_depth, set_depth_add, set_prev, set_next, et_recomp_min,
	et_check_occ_sanity, et_check_sanity, et_check_tree_sanity,
	record_path_before_1, record_path_before, check_path_after_1,
	check_path_after, et_splay, et_new_occ, et_new_tree,
	et_free_tree, et_set_father, et_split, et_nca, et_below): New.
	* basic-block.h (struct basic_block_def): New field dom.
	(struct dominance_info): Type removed.
	(calculate_dominance_info, free_dominance_info,
	nearest_common_dominator, set_immediate_dominator,
	get_immediate_dominator, dominated_by_p, get_dominated_by,
	add_to_dominance_info, delete_from_dominance_info,
	recount_dominator, redirect_immediate_dominators,
	iterate_fix_dominators, verify_dominators): Declarations
	changed.
	(enum dom_state): New.
	(dom_computed): New variable.
	(first_dom_son, next_dom_son): Declare.
	* dominance.c (struct dominance_info): Removed.
	(BB_NODE, SET_BB_NODE): Removed.
	(calculate_dominance_info, free_dominance_info,
	nearest_common_dominator, set_immediate_dominator,
	get_immediate_dominator, dominated_by_p, get_dominated_by,
	add_to_dominance_info, delete_from_dominance_info,
	recount_dominator, redirect_immediate_dominators,
	iterate_fix_dominators, verify_dominators,
	debug_dominance_info): Work over new datastructure.  Access
	dominance datastructures through CFG.
	(assign_dfs_numbers, compute_dom_fast_query, first_dom_son,
	next_dom_son): New.
	* tree-cfg.c (pdom_info): Variable removed.
	(create_bb): Add the block to the dominance information.
	(cleanup_tree_cfg): Let updating of the dominance on the
	individual passes.
	(remove_bb): Don't handle pdom.
	(cleanup_control_expr_graph, tree_make_forwarder_block,
	thread_jumps): Invalidate the dominators.
	(tree_split_edge): Update the dominators.
	(compute_dominance_frontiers_1, compute_dominance_frontiers,
	tree_verify_flow_info, tree_loop_optimizer_init): Use the new
	interface to dominators.
	* domwalk.c (walk_dominator_tree): Do not use dom_children.
	* tree-flow-inline.h (add_dom_child, remove_dom_child,
	clear_dom_children, dom_children): Removed.
	* tree-flow.h (struct bb_ann_d): Dom_children field removed.
	(add_dom_child, dom_children, build_dominator_tree): Declaration
	removed.
	(compute_dominance_frontiers): Declaration changed.
	* tree-optimize.c (optimize_function_tree): Free dominance
	information in the end.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize,
	dom_opt_finalize_block): Do not use dom_children.
	* tree-ssa-pre.c (fast_a_dominates_b, build_dfs_id_array_1,
	build_dfs_id_array): Removed.
	(pre_idom, dfs_id, dfs_id_last): Variables removed.
	(build_dfn_array): Do not use dom_children.
	(eref_compare, load_modified_phi_result, rename_1, reaching_def,
	finalize_1, collect_expressions, tree_perform_ssapre): Use the
	new interface to the dominance information.
	* tree-ssa.c (struct mark_def_sites_global_data): Idom field
	removed.
	(set_livein_block, verify_use, verify_phi_args,
	rewrite_into_ssa, mark_def_sites, verify_ssa): Use the new
	interface to the dominance information.
	(build_dominator_tree): Removed.
	* tree-tailcall.c (tree_optimize_tail_calls): Invalidate
	dominance information.
	* bt-load.c (dom): Variable removed.
	(augment_live_range, combine_btr_defs, migrate_btr_def,
	migrate_btr_defs, branch_target_load_optimize): Updated for the
	new interface for dominance information.
	* cfglayout.c (copy_bbs): Removed loops argument. Updated for
	the new interface for dominance information.
	* cfglayout.h (copy_bbs): Declaration changed.
	* cfgloop.c (flow_loop_pre_header_find, flow_loops_cfg_dump,
	flow_loop_scan, canonicalize_loop_headers, flow_loops_find): Updated
	for the new interface for dominance information.
	(flow_loop_scan): Loops argument removed.
	(flow_loops_free): Don't release dominators.
	* cfgloop.h (struct cfg): Dom field removed.
	(flow_loop_scan, loop_split_edge_with, simple_loop_p,
	just_once_each_iteration_p, split_loop_bb): Declaration changed.
	* cfgloopanal.c (simple_loop_exit_p, simple_increment,
	just_once_each_iteration_p, simple_loop_p): Remove loops argument.
	Updated for the new interface for dominance information.
	* cfgloopmanip.c (remove_bbs, find_path, create_preheader,
	split_loop_bb, loopify, duplicate_loop_to_header_edge,
	force_single_succ_latches, loop_split_edge_with): Ditto.
	(create_loop_notes): Free the dominators.
	* gcse.c (dominators): Variable removed.
	(free_code_hoist_mem, compute_code_hoist_data, hoist_code):
	Updated for the new interface for dominance information.
	* ifcvt.c (post_dominators): Variable removed.
	(mark_loop_exit_edges, merge_if_block, find_if_header,
	find_cond_trap, find_if_case_1, find_if_case_2, if_convert):
	Updated for the new interface for dominance information.
	* loop-init.c (rtl_loop_optimizer_init,
	rtl_loop_optimizer_finalize): Ditto.
	* loop-unroll.c (decide_peel_simple, decide_peel_once_rolling,
	decide_peel_completely, decide_unroll_stupid,
	decide_unroll_constant_iterations,
	decide_unroll_runtime_iterations): Loops argument removed.
	Updated for the new interface for dominance information.
	(unroll_and_peel_loops, peel_loops_completely,
	unroll_loop_runtime_iterations): Updated for the new interface for
	dominance information.
	* loop-unswitch.c (may_unswitch_on_p, unswitch_loops,
	unswitch_single_loop, unswitch_loop): Updated for the new
	interface for dominance information.
	* predict.c (process_note_predictions, process_note_prediction,
	estimate_probability, note_prediction_to_br_prob): Ditto.
	* sched-rgn.c (find_rgns, init_regions): Ditto.
	* toplev.c (rest_of_handle_branch_prob): Free the dominators.

2003-12-18  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (edges_to_redirect, redirection_targets): Merged
	into a single varray "redirection_edges".
	(tree_ssa_dominator_optimize): Twiddle initialization, finalization
	and accessors to redirection information based on combining varrays.
	Get the threading destination from the saved edge rather than from a
	saved block.  Mark variables appearing in PHIs at the jump thread
	destination to be taken out of SSA form.
	(thread_across_edge): Save the edge into the destination block
	rather than the destination block itself.  Twiddle based on
	combining varrays of jump threading information.
	* tree-flow.h (tree_block_forwards_to): Returns an edge rather than
	a block.
	* tree-cfg.c (tree_block_forwards_to): Return the edge leading to
	the target block rather than the target block itself.

2003-12-18  Daniel Berlin  <dberlin@dberlin.org>

	* tree-dfa.c (get_memory_tag_for): Don't put things with different
	points-to sets in the same memory tag.

2003-12-18  Jan Hubicka  <jh@suse.cz>

	* c-common.c (handle_nonnull_attribute, check_function_nonnull):
	Initialize arg_num.
	* c-format.c (handle_format_attribute): Initialize format_num.
	* rtlanal.c (get_related_value): Initialize get_jump_table_offset

2003-12-18  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* stmt.c (expand_start_loop, expand_loop_continue_here,
	expand_end_loop): Don't create loop notes.

2003-12-18  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
	    Jeff Law  <law@redhat.com>

	* tree-cfg.c (tree_node_shared_p): Explicitly allow sharing of
	CST nodes.
	* tree-simple.c (is_gimple_rhs): Allow CST nodes.
	(is_gimple_min_invariant): Reject constants with TREE_OVERFLOW set.
	* tree-ssa-ccp (visit_assignment): Test is_gimple_min_invariant
	after munging bitfields.
	* tree-ssa-dom.c (record_equivalences_from_stmt): Similarly.

2003-12-17  Jan Hubicka  <jh@suse.cz>

	Based on patch by Dale Johannesen
	* expr.c (MOVE_RATIO, CLEAR_RATIO): Move to ...
	* expr.h (MOVE_RATIO, CLEAR_RATIO): ... here

2003-12-17  Jan Hubicka  <jh@suse.cz>

	* Makefile.in (sibcall.o): Kill.
	(tree-tailcall.o): Add except.h dependency
	* sibcall.c: Kill.
	(purge_reg_equiv_notes, purge_mem_unchanging_flag): Move to ...
	* calls.c (purge_reg_equiv_notes, purge_mem_unchanging_flag) ... here.
	(expand_call): Do not produce placeholders; do not deal with tail
	recursion; set tail_call_emit.
	(fixup_tail_calls): New.
	* expr.h (fixup_tail_calls): Declare.
	* toplev.c (rest_of_handle_sibling_calls): Kill.
	(rest_of_compialtion): Do not use rest_of_handle_sibling_calls;
	call fixup_tail_calls.
	* tree-dump.c (dump_files): Add tail2
	* tree-flow.h (tree_optimize_tail_calls): Update prototype.
	* tree-optimize.c (optimize_function_tree): Do tail optimization twice.
	* tree-tailcall.c: Inlucde except.h
	(suitable_for_tail_call_opt_p): New.
	(optimize_tail_call): Add opt_tailcalls argument; optimize tailcalls.
	(tree_optimize_tail_calls): Add opt_tailcalls/pass arguments.
	* tree.h (CALL_EXPR_TAILCALL): New.
	(tree_dump_index): Add tail2
	* function.h (struct function): Add tail_call_emit field.

2003-12-17  Jan Hubicka  <jh@suse.cz>

	* tree-inline.c (estimate_num_insns_1):  Check that all nodes are
	known; add missing nodes; fix MODIFY_EXPR

2003-12-16  Jason Merrill  <jason@redhat.com>

	PR middle-end/12920
	* stor-layout.c (layout_type): Just return if type is
	error_mark_node.
	* c-decl.c (grokdeclarator): Immediately layout an
	ARRAY_TYPE used in a pointer-to-array declarator.

2003-12-16  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (may_alias_p): If VAR and PTR are pointers with the
	same alias set, return false.
	(get_memory_tag_for): Group based on alias set classes, not on
	conflicting alias sets.
	* tree-must-alias.c (promote_var): Don't bring aliases over when
	all the may-aliases of a non-promotable variable are promoted.

2003-12-16  Andrew MacLeod  <amacleod@redhat.com>

	* tree-flow-inline.h (free_vuse, free_vdefs): Moved to
	tree-ssa-operands.c
	(get_def_ops, get_use_ops, get_vdef_ops, get_vuse_ops): Use the new
	more direct structure pointer.
	(get_use_op_ptr, get_def_op_ptr): Cast is no longer necessary.
	* tree-flow.h (struct stmt_ann_d): Replace operands and voperands
	pointers with pointers directly to the operand types.
	* tree-ssa-dom.c (cprop_into_stmt): Use new stmt based interface to
	free virtual operands.  Check virtual bases of both VUSE and VDEF.
	* tree-ssa-operands.c (struct voperands_d): Declare here, used only
	for previous_vops during stmt operand construction.
	(struct vecmanage_d, vecmanage_add_segmen, vecmanage_add_special,
	vecmanage_init, vecmanage_tree_ptr_init, vecmanage_fini, check_free,
	vecmanage_new_vector, vecmanage_new_tree_ptr_vector,
	vecmanage_free_vector): Remove.
	(allocate_ssa_op_vec, free_ssa_op_vec, allocate_ssa_virtual_op_vec,
	allocate_operands_t, allocate_voperands_t): Remove.
	(finalize_new_ssa_operands, inalize_new_ssa_virtual_operand): Remove.
	(struct freelist_d): New. List of free operand structures.
	(check_optype_freelist): New. Choose memory from freelist, if available.
	(add_optype_freelist): New. Add structure to freelist, if appropriate.
	(allocate_def_optype): New. Allocate a def operand list from GC.
	(allocate_use_optype): New. Allocate a useoperand list from GC.
	(allocate_vdef_optype): New. Allocate a vdef operand list from GC.
	(allocate_vuse_optype): New. Allocate a vuse operand list from GC.
	(free_uses, free_defs, free_vuses, free_vdefs): Use GC and the freelist.
	(remove_vuses, remove_vdefs): New.  External interface to remove virtual
	operands.
	(init_ssa_operands, fini_ssa_operands): Ensure the free list is empty.
	(finalize_ssa_defs, finalize_ssa_use, finalize_ssa_vdefs,
	finalize_ssa_vuses): Use new direct pointers from the stmt annotation.
	(append_vdef, append_vuse): No need to hack prev_vops pointer now.
	(get_stmt_operands): use new freeing interface, keep previous vops in
	their own local structure for now, passing its address around.
	* tree-ssa-operands.h (struct def_optype_d, struct use_optype_d,
	struct vdef_optype_d, struct vuse_optype_d): Implement as a single
	dynamically allocated structure.
	(struct operands_d, struct operands_d): Remove.
	* tree-ssa-pre.c (subst_phis): Remove virtual operands using new funcs.

2003-12-16  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (verify_addr_expr): Rename to ....
	(verify_expr):  ... this one; check that no SSA names are on
	freelist.
	(verify_stmt, verify_stmts): Update calls of verify_addr_expr.

	Revert until initializers are made language independent:
	* cgraphunit.c (record_call_1): Do not call analyze_expr hook
	* langhooks-def.h (LANG_HOOKS_CALLGRAPH_ANALYZE_EXPR): Kill.
	(LANG_HOOKS_CALLGRAPH_INITIALIZER): Update.
	* longhooks.h (lang_hooks_for_callgraph): Kill analyze_expr.

2003-12-16  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-pretty-print.c (dump_bb_header): Show block number when
	there is no label.
	(pp_cfg_jump): Show labels in addition to block numbers.
	(dump_generic_bb_buff): Always call dump_bb_header.

2003-12-16  Jan Hubicka  <jh@suse.cz>

	* cgraphunit.c (cgraph_remove_unreachable_nodes): Fix typo;
	improve comments; cleanup linked list mantenance.

2003-12-15  Diego Novillo  <dnovillo@redhat.com>

	* tree-sra.c (can_be_scalarized_p): Reject volatile variables.

	* sibcall.c (skip_copy_to_return_value): Initialize 'hardret' and
	'softret'.

2003-12-16  Jan Hubicka  <jh@suse.cz>

	* cgraph.c (cgraph_remove_node): Ignore DECL_EXTERNAL clones.
	* cgraphunit.c (verify_cgraph_node): Do not insist on unemmited extern
	inline functions to be valid.
	(cgraph_finalize_compilation_unit):  Fix ordering.
	(cgraph_mark_functions_to_output): Do not insist on DECL_EXTERNAL
	nodes to be reclaimed.
	(cgraph_remove_unreachable_nodes): New function.
	(cgraph_decide_inlining): use it.

2003-12-15  Andrew MacLeod  <amacleod@redhat.com>

	* Makefile.in (TREE_FLOW_H): Add dependence on tree-ssa-operands.h
	(OBJS-common): Add tree-ssa-operands.o
	(tree-ssa-operands.o): Add dependencies.
	(GTFILES): Add tree-ssa-operands.[ch].
	* tree-dfa.c (get_stmt_operands, get_expr_operands, add_stmt_operand,
	note_addressable, add_def, add_use, add_vde, add_vuse,
	add_call_clobber_ops, add_call_read_ops): Moved to tree-ssa-operands.c.
	(compute_immediate_uses_for_stmt): Use new optypes interface.
	(cleanup_operand_arrays): Delete.
	(collect_dfa_stats_r): Use new optypes interface.
	(get_call_flags): Moved to tree-ssa-operands.c.
	(vdefs_disappeared_p, mark_new_vars_to_rename): Use optypes interface.
	* tree-flow-inline.h (def_ops, use_ops, vdef_ops, vuse_ops): Use new
	optypes.
	(free_vuses): New. Clear and release vuses.
	(free_vdefs): New. Clear and release vdefs.
	(get_use_ops_ptr): New. Get address of a use op.
	(get_def_ops_ptr): New. Get address of a use op.
	(get_vdef_result_ptr): New. Get address of a use op.
	(get_vdef_op_ptr): New. Get address of a use op.
	(get_vuse_op_ptr): New. Get address of a use op.
	(start_ssa_stmt_operands): New. Entry point to start processing stmt
	operands.
	* tree-flow.h (struct operands_d, struct voperands_d): Move to
	tree-ssa-operands.h
	(struct stmt_ann_d): Add GTY markers to operands.
	* tree-pretty-print.c (dump_vops): Use optypes interface.
	* tree-sra.c (create_scalar_copies): Use optypes interface.
	(scalarize_structures, scalarize_modify_exp): Use optypes interface.
	* tree-ssa-ccp.c (visit_stmt, ccp_fold, initialize, replace_uses_in,
	likely_value, set_rhs): Use optypes interface.
	* tree-ssa-dce.c (find_useful_stmts, stmt_useful_p, process_worklist):
	Use optypes interface.
	* tree-ssa-dom.c (thread_across_edge, thread_jumps_walk_stmts): Use
	optypes interface.
	(cprop_into_stmt): Rewrite using new interface.
	(eliminate_redundant_computations, record_equivalences_from_stmt,
	optimize_stmt, avail_expr_hash, avail_expr_eq): Use optypes interface.
	* tree-ssa-live.c (create_ssa_var_map, calculate_live_on_entry,
	build_tree_conflict_graph,register_ssa_partitions_for_vars): Use
	optypes interface.
	* tree-ssa-pre.c (names_match_p, maybe_find_rhs_use_for_var,
	expr_phi_insertion, same_e_version_real_occ_real_occ, opnum_of_phi,
	generate_expr_as_of_bb, generate_vops_as_of_bb, subst_phis,
	load_modified_real_occ_real_occ, same_e_version_phi_result, can_insert,
	get_default_def, reaching_def, process_left_occs_and_kills,
	collect_expressions): Use optypes interface.
	* tree-ssa.c (mark_def_sites, check_replaceable, find_replaceable_in_bb,
	dump_replaceable_exprs, rewrite_trees, verify_ssa, rewrite_stmt): Use
	optypes interface.
	(init_tree_ssa): Initialize new operand data structures.
	(delete_tree_ssa): Free new operand structures.
	* tree.h (VDEF_RESULT, VDEF_OP, NUM_VDEFS): Move to tree-ssa-operands.h.

	* tree-ssa-operands.h: New file.
	(struct def_optype_d): New. Structure for stmt defs.
	(struct use_optype_d): New. Structure for stmt uses.
	(struct vdef_optype_d): New. Structure for stmt vdefs.
	(struct vuse_optype_d): New. Structure for stmt vuses.
	(USE_OPS, STMT_USE_OPS, NUM_USES, USE_OP_PTR, USE_OP): Macros to
	access stmt uses.
	(DEF_OPS, STMT_DEF_OPS, NUM_DEFS, DEF_OP_PTR, DEF_OP): Macros to
	access stmt defs.
	(VDEF_OPS, STMT_VDEF_OPS, NUM_VDEFS, VDEF_RESULT_PTR, VDEF_RESULT,
	VDEF_OP_PTR, VDEF_OP): Macros to access stmt vdefs.
	(VUSE_OPS, STMT_VUSE_OPS, NUM_VUSES, VUSE_OP_PTR, VUSE_OP): Macros to
	access stmt vuses.
	(struct operands_d, struct voperands_d): moved from tree-dfa.c.
	* tree-ssa-operands.c: New file.
	(build_defs, build_uses, build_vdefs, build_vuses): New static varrays.
	(struct vecmanage_d): New. Struct to manage non-GC vectors.
	(vecmanage_add_segment): New. Add a new segment to a vector manager.
	(vecmanage_add_special): New. Add a large vector to the special list.
	(vecmanage_init): Initialize a vector manager.
	(vecmanage_tree_ptr_init): New. Initialize a vector manager for tree *.
	(vecmanage_fini): New. Release vector manager memory.
	(check_free): New. Look for free memory in the vector maanger.
	(vecmanage_new_vector): New. Allocate a vector.
	(vecmanage_new_tree_ptr_vector): New. Allocate a vector of 'tree *'.
	(vecmanage_free_vector): New. Free a vector.
	(free_ssa_op_vec): New. Free an ssa operand's memory.
	(allocate_ssa_op_vec): New. Allocate a vector for use/defs.
	(allocate_ssa_virtual_op_vec): New. Allocate a vector for vuse/vdefs.
	(allocate_operands_t): New. Allocate an operand structure.
	(allocate_voperands_t): New. Allocate a virtual operand structure.
	(free_uses): New. Clear and release uses.
	(free_defs): New. Clear and release defs.
	(init_ssa_operands): New. Initialize ssa operand management.
	(fini_ssa_operands): New. Cleanup ssa operand management.
	(finalize_new_ssa_operands): New. Commit current operands.
	(finalize_new_ssa_virtual_operands): New. Commit current virtual ops.
	(finalize_ssa_defs): New. Commit and verify stmt definitions.
	(finalize_ssa_uses): New. Commit and verify stmt uses.
	(finalize_ssa_vdefs): New. Commit and verify stmt virtual definitions.
	(finalize_ssa_vuses): New. Commit and verify stmt virtual uses.
	(finalize_ssa_stmt_operands): New. Commit all stmt operands.
	(verify_start_operands): New. Verify build mechanism is ready for a new
	stmt.
	(append_def): Renamed from add_def, and moved from tree-dfa.c.
	(append_use): Renamed from add_def, and moved from tree-dfa.c.
	(append_vdef): Renamed from add_def, and moved from tree-dfa.c.
	(append_vuse): Renamed from add_def, and moved from tree-dfa.c.
	(add_vuse): New. Entry point to add a vuse to a stmt.
	(get_call_flags): Moved from tree-dfa.c
	(get_stmt_operands, get_expr_operands, add_stmt_operand): Moved from
	tree-dfa.c, and use new optype interface.
	(note_addressabe, add_call_clobber_ops, add_call_read_ops): Moved from
	tree-dfa.c

2003-12-15  Diego Novillo  <dnovillo@redhat.com>

	* tree-optimize.c (optimize_function_tree): Call BITMAP_XFREE.

2003-12-15  Diego Novillo  <dnovillo@redhat.com>

	PR optimization/12747

	* tree-cfg.c (verify_addr_expr): Simplify predicates.
	* tree-must-alias.c (addresses_needed): Declare as file local.
	(can_be_promoted): New.
	(tree_compute_must_alias): Call it.
	Remove promoted variables from call_clobbered_vars.
	(find_addressable_vars): Update comment.
	Remove argument.  Update callers.
	(promote_var): Always clear TREE_ADDRESSABLE.
	Don't remove promoted variables from call_clobbered_vars.
	If the promoted variable is in the may-alias set of a
	non-promotable variable, copy its alias set into the alias set of
	the non-promotable variable.
	(find_variable_in): Update comment.
	* tree-sra.c (can_be_scalarized_p): Reject structures with
	__complex__ fields in them.

2003-12-15  Diego Novillo  <dnovillo@redhat.com>
	    Jason Merrill <jason@redhat.com>

	PR optimization/12747

	* Makefile.in (tree-simple.o): Add dependency on bitmap.h and
	$(GGC_H).
	(GTFILES): Add tree-simple.c.
	* tree-simple.c: Include ggc.h and bitmap.h.
	(is_gimple_non_addressable_1): Remove.  Update all callers.
	(types_checked): New local variable.
	(types_in_memory): New local variable.
	(struct_needs_to_live_in_memory): New.
	(needs_to_live_in_memory): New.
	(is_gimple_reg): Call it.
	(is_gimple_non_addressable): Call it.
	(is_gimple_call_clobbered): Call it.
	* tree-simple.h (needs_to_live_in_memory): Declare.

2003-12-14  Andreas Jaeger  <aj@suse.de>

	* config/rs6000/rs6000.c (rs6000_output_function_epilogue): Handle
	GNU F95.

2003-12-14  Jan Hubicka  <jh@suse.cz>

	* cgraphunit.c (cgraph_expand_function):  Release function body when no
	longer needed.
	(lookup_recursive_calls): New function.
	(cgraph_decide_recursive_inlining): Likewise.
	(cgraph_decide_inlining_of_small_functions): Do recursive inlining.
	* tree-inline.c: Include function.h
	(copy_body): Choose saved body for recursive inlining.
	(initialize_inlined_parameters): Likewise.
	(expand_call_inline): Do not verify nodes when recursivly inlining,
	insert ret_label into decl map.
	* params.def (PARAM_MAX_INLINE_INSNS_RECURSIVE,
	PARAM_MAX_INLINE_INSNS_RECURSIVE_AUTO,
	PARAM_MAX_INLINE_RECURSIVE_DEPTH,
	PARAM_MAX_INLINE_RECURSIVE_DEPTH_AUTO): New argument.
	* invoke.texi (max-inline-insns-recursive, max-inline-recursive-depth):
	Document.
	* Makefile.in (tree-inline.o): Include function.h.

2003-12-14  Jan Hubicka  <jh@suse.cz>

	* cgraphunit.c (record_call_1): Do not call analyze_expr hook
	* langhooks-def.h (LANG_HOOKS_CALLGRAPH_ANALYZE_EXPR): Kill.
	(LANG_HOOKS_CALLGRAPH_INITIALIZER): Update.
	* longhooks.h (lang_hooks_for_callgraph): Kill analyze_expr.

2003-12-13  Jan Hubicka  <jh@suse.cz>

	* timevar.def (TV_TREE_STMT_VERIFY, TV_CFG_VERIFY, TV_CGRAPH_VERIFY):
	New timers.
	* tree-cfg.c (verify_stmts):  Push/pop timevar.
	* cfg.c: Include timevar.h
	(verify_flow_info): Push/pop timevar.
	* Makefile.in (cfg.o): Add dependnecy on TIMEVARS

	* cgraph.c (cgraph_create_edge): Sanity check for duplicates;
	initialize aux.
	(cgraph_remove_node): Decrease cgraph_n_nodes; do not clear
	DECL_SAVED_TREE when dumping.
	(cgraph_dump_node): Break out from ...; print more information.
	(cgraph_dump): ... here.
	* cgraph.h (cgraph_node): Add aux field.
	(dump_cgraph_node, verify_cgraph, verify_cgraph_node): Declare.
	(cgraph_mark_inline_edge): Declare
	* cgraphunit.c (error_found): New static variable.
	(verify_cgraph_node_1): New static function.
	(verify_cgraph_node, verify_cgraph): New global function.
	(cgraph_expand_function): More sanity checks.
	(cgraph_clone_inline_nodes): Destructivly clone DECL_EXTERNAL nodes.
	(cgraph_mark_inline_edge): Make global.
	(cgraph_decide_inlining): Remove extern inline functions never inlined.
	(cgraph_decide_inlining_incrementally): Verify that function body is
	still present.
	(expand_all_functions): Verify that all nodes are reachable.
	(cgraph_optimize): Verify cgraph and memory management.
	* tree-inline.c (copy_body_r): All edges must be present.
	(expand_call_inline): Sanity check newly created edges and nodes
	being inlined.
	(optimize_inline_calls): Sanity check that we've inlined everything.
	* tree-optimize.c (tree_rest_of_compilation): Clone functions inlined
	into cloned node.

2003-12-13  Jan Hubicka  <jh@suse.cz>

	* tree-flow.h (tree_ssa_useless_type_conversion_1): Declare.
	* tree-flow.c (tree_ssa_useless_type_conversion_1): Break out from
	from...; allow complex types whose subtypes match.
	(tree_ssa_useless_type_conversion): ... here.

2003-12-12  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_stmt): Don't call cleanup_control_expr
	here.  Instead just note that we need to cleanup the cfg (which
	will DTRT).

	* timevar.def (TV_TREE_SSA_THREAD_JUMPS): Kill.
	* tree-dump.c (dump_files): Kill .thread dump.
	* tree.h (TDI_thread_jumps): Kill.
	* tree-flow.h (tree_ssa_dominator_thread_jumps): Kill prototype.
	* tree-optimize.c (optimize_function_tree): Kill call to
	tree_ssa_dominator_thread_jumps.
	* tree-ssa-dom.c (thread_through_phis): Kill.  We no longer need
	to restrict threading through PHIs.
	(tree_ssa_dominator_thread_jumps): Kill.
	(tree_ssa_domiantor_optimize_1): Fold back into
	tree_ssa_dominator_optimize.
	(tree_ssa_dominator_optimize): Mark back edges in the flow graph.
	Kill code which conditionalized the walk_tree callbacks based
	on thread_through_phis.  When threading jumps, reorganize code
	so that we can take the affected variables out of SSA form.
	Mark new variables created by out-of-ssa code as needing to be
	rewritten.
	(thread_across_edge): Always allow threading through phis.
	(thread_jumps_walk_stmts): Kill.

	* tree-ssa.c (create_temp): When we create a new temporary, make
	sure to put it into referenced_vars, give it an ID number and
	a suitable mem_tag.
	(eliminate_build): If we encounter a PHI argument which is an
	SSA_VAR we are not rewriting out of SSA form, then just treat
	it like a constant.
	(rewrite_vars_out_of_ssa): New function.
	* tree-flow.h (rewrite_vars_out_of_ssa): Prototype.
	* tree-ssa-live.c (register_ssa_partitions_for_vars): New function.
	* tree-ssa-live.h (register_ssa_partitions_for_vars): Prototype.

2003-12-12  Jan Hubicka  <jh@suse.cz>

	* tree-inline.c (remap_decl): Avoid invalid sharing.
	* cp-tree.h (optimize_function): Kill.
	* optimize.c (optimize_function): Kill.
	* semantics.c (expand_body): Do not call optimize_function.

2003-12-12  Jan Hubicka  <jh@suse.cz>

	* cgraphunit.c (cgraph_optimize):  Do not decide inlining when not
	inlining

2003-12-11  Jan Hubicka  <jh@suse.cz>

	* tree-inline.c (initialize_inlined_parameters): Disable
	constant propagation for non-gimple-min-invariant when
	preserving gimple form.

2003-12-11  Jeff Law  <law@redhat.com>

	* tree-ssa-ccp.c (widen_bitfield): Clear out unwanted high bits
	even if the field's type is unsigned.
	* tree-ssa-dom.c (record_equivalences_from_stmt): When creating
	equivalences from stores, be more careful about non-constant
	stores to bitfields.

2003-12-11  Diego Novillo  <dnovillo@redhat.com>

	* opts.c (decode_options): Do not enable the tree loop optimizer by
	default.
	* tree-ssa-loop.c (tree_ssa_loop_opt): Remove ENABLE_CHECKING
	guards.

2003-12-10  Richard Henderson  <rth@redhat.com>

	* builtins.c (expand_builtin_profile_func): New.
	(expand_builtin): Use it.
	* builtins.def (BUILT_IN_PROFILE_FUNC_ENTER): New.
	(BUILT_IN_PROFILE_FUNC_EXIT): New.
	* function.c (expand_function_start, expand_function_end): Don't
	do function instrumentation here.
	* gimplify.c (gimplify_function_tree): Do it here.

	* c-opts.c (c_common_post_options): Don't ever use rtl inlining.

2003-12-10  Diego Novillo  <dnovillo@redhat.com>

	* ifcvt.c (dead_or_predicable): Initialize local variable
	'earliest'.
	* tree-cfg.c (verify_stmt): Fix typo.
	* tree-ssa-dom.c (propagate_value): New local function.
	(cprop_into_stmt): Call it.
	(cprop_into_phis): Call it.
	(eliminate_redundant_computations): Call it.

2003-12-10  Dale Johannesen  <dalej@apple.com>

	* tree-dfa.c (compute_alias_sets):  Don't try to make
	GLOBAL_VAR alias itself.

2003-12-08  Steven Bosscher  <stevenb@suse.de>

	* tree-must-alias.c (tree_compute_must_alias): Use
	num_call_clobbered_vars and call_clobbered_var() instead of
	poking in the call_clobbered_vars varray directly.

2003-12-11  Jan Hubicka  <jh@suse.cz>

	* cgraph.c (cgraph_function_possibly_inlined_p): Fix syntax error on
	gcc-2.95.

2003-12-10  Diego Novillo  <dnovillo@redhat.com>

	Revert

	2003-12-07  Richard Henderson  <rth@redhat.com>

		* c-common.c (c_address_looks_like_offsetof): New.
		* c-common.h (c_address_looks_like_offsetof): Declare.
		* c-typeck.c (build_unary_op) <ADDR_EXPR>: Use it.  Don't lower
		address references not destined for offsetof.
		(c_expand_return): Only look inside ARRAY_REF and COMPONENT_REF
		when looking for returning address of local variable.
		* expr.c (expand_expr_1): Don't dereference size
		of unbounded arrays.
		* gimplify.c (gimplify_addr_expr): Only fold
		address of variable size array elements.
		* tree-simple.c (is_gimple_min_invariant): Also check
		is_gimple_variable before disallowing offset address for type.
		* tree-ssa-ccp.c (maybe_fold_offset_to_aggregate_ref): New.
		(maybe_fold_offset_to_component_ref): Use it.
		(maybe_fold_stmt_indirect, maybe_fold_stmt_plus): Likewise.
		(maybe_fold_offset_to_array_ref): Likewise.
		Don't fail for division remainder non-zero.
		* varasm.c (initializer_constant_valid_p) <ADDR_EXPR>: Use
		handled_component_p and look inside references.
		<MINUS_EXPR>: Always look past widening casts.

2003-12-09  Jan Hubicka  <jh@suse.cz>

	* cgraph.c (cgraph_inline_hash): New global variable.
	(cgraph_create_node): Break out of ....
	(cgraph_node): ... this one.
	(cgraph_redirect_edge_callee):  New function.
	(cgraph_remove_node): Aggressively elliminate dead nodes;
	remove node out of clone list.
	(dump_cgraph): Dump inlined_to field; dump uid numbers.
	(cgraph_clone_edge): Return edge created.
	(cgraph_clone_node): New.
	(cgraph_function_possibly_inlined_p): Re-implement using hashtable.
	* cgraph.h: Include hashtab.h
	(struct cgraph_global_info): Kill inline_once, will be output and
	cloned_times fields.  Add inlined_to field.
	(cgraph_node): Add next_clone.
	(cgraph_inline_hash): Declare.
	(cgraph_clone_edge): Update prototype.
	(cgraph_clone_node, cgraph_redirect_callee): Declare.
	* cgraphunit.c (cgraph_optimize_function): Kill.
	(cgraph_assemble_function): Kill next_needed to avoid GGC corruption.
	(cgraph_analyze_function): Do not intialize cloned_times and
	will_be_output.
	(cgraph_finalize_compilation_unit):  Clear next_needed.
	(cgraph_optimize_function): Kill.
	(cgraph_expand_function): Do not use cgraph_optimize_function.
	(cgraph_estimate_growth, cgraph_mark_inline,
	cgraph_check_inline_limits, cgraph_recursive_inlining_p,
	cgraph_preserve_function_body_p): Update for explicit clones.
	(INLINED_TIMES, SET_INLINED_TIMES, cgraph_inlined_into,
	cgraph_inlined_callees, struct cgraph_inline_context,
	cgraph_create_inline_context, cgraph_free_inline_context,
	cgraph_inline_context_set_caller, cgraph_inline_context_clear_caller,
	cgraph_inline_context_set_callee, cgraph_inline_context_clear_callee,
	update_callee_keys): Kill.
	(cgraph_clone_inlined_nodes, cgraph_mark_inline_edge): New.
	(cgraph_decide_inlining_of_small_functions, (cgraph_decide_inlining,
	cgraph_decide_inlining_incrementally): Simplify.
	* tree-inline.c (typedef struct_inline_data): New field saving_p.
	(copy_body_r): Update all clones.
	(expand_call_inline): Remove inlined cgraph node.
	(save_body): Inicialize id.node and id.saving_p.
	* tree-optimize.c (tree_rest_of_compilation): Maintain clone up-to-date
	in no-unit-at-a-time mode.

2003-12-08  Steven Bosscher  <stevenb@suse.de>

	* tree-optimize.c (optimize_function_tree): Move verify_ssa calls
	into conditionals.

2003-12-08  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-ander.c (andersen_same_points_to_set): Fix memory leak.

2003-12-08  Jeff Law  <law@redhat.com>

	* tree-ssa-live.c (register_ssa_partition): Kill legacy code which
	recursively called register_ssa_partition on PHI arguments when
	SSA_VAR was defined by a PHI_NODE.

2003-12-08  Jan Hubicka  <jh@suse.cz>

	* tree-dump.c (dump_files): Fix ordering of tail call pass.
	* tree.h (tree_dump_index): Likewise.

2003-12-08  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* Makefile.in (tree-cfg.o): Add gt-tree-cfg.h dependency.
	(GTFILES): Add tree-cfg.c.
	* tree-cfg.c: Include gt-tree-cfg.h.
	(factored_computed_goto_label, factored_computed_goto):
	Mark gc roots.

2003-12-08  Steven Bosscher  <stevenb@suse.de>
	    Jan Hubicka  <jh@suse.de>

	* gengtype-lex.l (IWOrD): Add HOST_WIDEST_INT
	* Makefile.in (function.o, reg-stack.o): Add missing dependency on
	basic-block.h.
	(GTFILES): Add basic-block.h and hwint.h.
	* basic-block.h (struct edge_def): Add GTY markers, make garbage
	collectable.  Make `insns' field GC safe depending on the setting
	of cfg_hooks.
	(struct basic_block_def): Add GTY markers, make garbage collectable.
	(tree_bb_root, tree_phi_root): Kill extern decls.
	(ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR): Change from macro to variable
	(entry_exit_blocks): Kill.
	* cfg.c: Include ggc.h
	(bb_pool, edge_pool, entry_exit_blocks): Kill.
	(ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR): Define.
	(init_flow): Do not create ppols; allocate entry/exit block.
	(free_edge, alloc_block, expunge_block, unchecked_make_edge): Use GGC.
	(compact_blocks): Don't update tree_bb_root and tree_phi_root.
	* cfgrtl.c (rtl_merge_blocks): Clear head pointer.
	* regs.h: Protect against multiple inclusion.
	* tree-cfg.c (obstack_tree_ann_obstack, first_block_tree_and_obj,
	tree_bb_root): Kill.
	(build_tree_cfg, create_bb, remove_bb, delete_tree_cfg): Don't
	touch tree_bb_root and tree_phi_root.
	(create_block_annotations): Do not initialize obstack.
	(free_block_annotations): Do not free obstack.
	(create_block_annotation): Use GGC.
	* tree-dfa.c (tree_phi_root): Kill.
	* tree-flow.h (bb_ann, bb_ann_d): Declare.  Add `phi_nodes' field.
	* tree-phinodes.c (create_phi_node, add_phi_arg, remove_phi_node,
	remove_all_phi_nodes_for): Use `phi_nodes' field in the bb
	annotation instead of tree_phi_root.
	* tree-flow-inline.h (phi_nodes, set_phi_nodes): Likewise.
	(add_dom_child, clear_dom_children): Use GGC.
	* tree-ssa-pre.c (code_motion): Use `phi_nodes' field in the bb
	annotation instead of tree_phi_root.
	* varray.h (union varray_data): Make basic_block_def and edge_def
	varrays garbage collectable.

2003-12-07  Richard Henderson  <rth@redhat.com>

	* c-common.c (c_address_looks_like_offsetof): New.
	* c-common.h (c_address_looks_like_offsetof): Declare.
	* c-typeck.c (build_unary_op) <ADDR_EXPR>: Use it.  Don't lower
	address references not destined for offsetof.
	(c_expand_return): Only look inside ARRAY_REF and COMPONENT_REF
	when looking for returning address of local variable.
	* expr.c (expand_expr_1): Don't dereference size of unbounded arrays.
	* gimplify.c (gimplify_addr_expr): Only fold address of variable size
	array elements.
	* tree-simple.c (is_gimple_min_invariant): Also check
	is_gimple_variable before disallowing offset address for type.
	* tree-ssa-ccp.c (maybe_fold_offset_to_aggregate_ref): New.
	(maybe_fold_offset_to_component_ref): Use it.
	(maybe_fold_stmt_indirect, maybe_fold_stmt_plus): Likewise.
	(maybe_fold_offset_to_array_ref): Likewise.  Don't fail for division
	remainder non-zero.
	* varasm.c (initializer_constant_valid_p) <ADDR_EXPR>: Use
	handled_component_p and look inside references.
	<MINUS_EXPR>: Always look past widening casts.

2003-12-07  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (compute_dominance_frontiers): Don't assume that
	the first block has index 0.

2003-12-07  Jan Hubicka  <jh@suse.cz>

	* cgraph.c (create_edge): Rename to ...
	(cgraph_create_edge): ... this one; accept call_expr as operand.
	(cgraph_edge): New function
	(cgraph_remove_edge): Use edge as argument
	(cgraph_record_call, cgraph_remove_call): Kill.
	(clone_cgraphedge): New function.
	* cgraph.h (cgraph_edge): Add call_expr argument; add chain_next.
	(cgraph_record_call, cgraph_remove_call): Kill prototype.
	(cgraph_remove_call, cgraph_inline_p): Update prototype.
	(cgraph_clone_edge): Declare.
	* cgraphunit.c (cgraph_finalize_function): Update use of
	cgraph_remove_edge
	(record_call_1): Use cgraph_create_edge; record builtins too.
	(cgraph_create_edges): Accept node instead of decl.
	(cgraph_analyze_function): Update use cgraph_create_edges.
	(cgraph_inline_p): Accept edge.
	* tree-inline.c (inline_data): Replace decl and current_decl
	by node and current_node.
	(copy_body_r): Clone edges.
	(expand_call_inline): Do not create inlined edges.
	(optimize_inline_call): Set id->current_node, id->node.
	* tree-optimize.c (tree_rest_of_compilation): Update cgraph edges after
	compiling.

2003-12-07  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-loop.c (dump_file, dump_flags): Only declare with
	checking enabled.
	(tree_ssa_loop_opt): Mark arguments with ATTRIBUTE_UNUSED.

2003-12-07  Richard Henderson  <rth@redhat.com>

	* function.h (struct function): Add last_label_uid.
	* tree-cfg.c (set_bb_for_stmt): Use it.
	(delete_tree_cfg): Clear label_to_block_map.

	* gimple-low.c (lower_stmt_body): Export.
	(lower_stmt): Allow data to be null.
	* gimplify.c (declare_tmp_vars): Make static.
	(push_gimplify_context): Export.
	(pop_gimplify_context): Export.  Put the temps somewhere.
	(gimplify_body): Don't declare_tmp_vars here.
	* tree-flow.h, tree-simple.h: Update for new decls.

	* tree-mudflap.c (mf_build_string): New.
	(mudflap_c_function_decls): Push and pop gimplify context, don't
	gimplify here.  Dump pass 1.
	(mudflap_c_function_ops): Similarly.
	(mf_decl_cache_locals): Gimplify eveything as we go along.
	(mf_build_check_statement_for): Likewise.
	(mf_mostly_copy_tree_r): Remove.
	(mf_varname_tree): Use mf_build_string.
	(mf_file_function_line_tree): Rewrite.
	(mf_offset_expr_of_array_ref): Remove.
	(mx_xfn_indirect_ref): Remove.
	(mf_xform_derefs_1): New.
	(mf_xform_derefs): Rewrite to expect gimple.
	(mx_register_decls): Use build_function_call_expr.
	(mudflap_enqueue_constant): Use mf_build_string.
	* tree-optimize.c (tree_rest_of_compilation): Reorder mudflap bits.
	* tree-dump.c (dump_files): Split mudflap to parts 1 and 2.
	* tree.h (enum tree_dump_index): Likewise.

2003-12-06  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa-loop.c: New.
	* Makefile.in (tree-ssa-loop.o): New.
	* common.opt (ftree-loop-optimize): Add.
	* flags.h (flag_tree_loop): Declare.
	* opts.c (decode_options): Enable flag_tree_loop at -O1.
	(common_handle_option): Handle OPT_ftree_loop_optimize.
	* timevar.def (TV_TREE_LOOP): New.
	* toplev.c (flag_tree_loop): New.
	(f_options): Add -ftree-loop-optimize.
	* tree-cfg.c (build_tree_cfg): Remove disabled loop optimizer
	initialization.
	(tree_make_forwarder_block): Update phi nodes.
	(tree_loop_optimizer_init): Don't call force_single_succ_latches.
	(tree_try_redirect_by_replacing_jump): Comment fix.
	* tree-dump.c (dump_files): Add .loop dump.
	* tree-flow.h (tree_ssa_loop_opt, set_phi_nodes): Declare.
	* tree-optimize.c (optimize_function_tree): Call tree_ssa_loop_opt.
	* tree.h (enum tree_dump_index): Add TDI_loop.
	* tree-flow-inline.h (set_phi_nodes): New.
	* doc/invoke.texi (-fdump-tree-loop, -ftree-loop-optimize): Document.

2003-12-05  Jeff Law  <law@redhat.com>

	* tree-dfa.c (mark_new_vars_to_rename): Change VARS_TO_RENAME to be
	a "bitmap" instead of an "sbitmap".  Callers updated.
	* tree-must-alias.c (promote_var): Likewise.
	(tree_compute_must_alias): Likewise.
	* tree-phinodes.c (remove_all_phi_nodes_for): Likewise.
	* tree-ssa-dom.c (tree_ssa_dominator_thread_jumps): Likewise.
	(tree_ssa_dominator_optimize): Likewise.
	(tree_ssa_dominator_optimize_1): Likewise.
	* tree-ssa-pre.c (pre_expression): Likewise.
	(tree_perform_ssapre): Likewise.
	* tree-ssa.c (rewrite_into_ssa): Likewise.
	(insert_phi_nodes): If VARS_TO_RENAME is zero, then examine
	each node to determine if we need to insert a PHI.
	(prepare_operand_for_rename): If VARS_TO_RENAME is zero, then
	assume the operand needs renaming.
	* tree-ssa-ccp.c (substitute_and_fold): Change VARS_TO_RENAME to
	be a "bitmap" instead of an "sbitmap".  Callers updated.
	(tree_ssa_ccp): Likewise.  Also make sure timevar_pop encloses
	entire function.
	(scalarize_modify_expr): Likewise.
	* tree-sra.c (create_scalar_copies): Change VARS_TO_RENAME to
	be a "bitmap" instead of an "sbitmap".  Callers updated.
	(tree_sra): Likewise.
	* tree-optimize.c (optimize_function_tree): Make VARS_TO_RENAME
	be a "bitmap" instead of an "sbitmap".
	* tree-flow.h: Update various prototypes.

2003-12-05  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (remove_useless_stmts_goto, remove_useless_stmts): Move
	handling of factored_computed_goto ...
	(disband_implicit_edges): ... here.

2003-12-05  Jan Hubicka  <jh@suse.cz>

	* tree-eh.c (tree_could_trap_p): Fix warning.
	* expr.c (expand_expr): Fix warning on uninitialized last.

2003-12-04  Jeff Law  <law@redhat.com>

	* tree-ssa.c (rewrite_trees): Do not unconditionally overwrite
	variables set by statements.  Let replace_variable do any
	required rewriting.

2003-12-04  Richard Henderson  <rth@redhat.com>

	* c-parse.in (primary): Use annotate_with_locus instead of
	STMT_LINENO for STMT_EXPR.
	* c-simplify.c (gimplify_stmt_expr): Likewise.

2003-12-04  Jan Hubicka  <jh@suse.cz>

	* tree-dump.c (dump_files): Reorder tailcall and mustalias
	* tree.h (tree_dump_index): Likewise.
	* tree-optimize.c (optimize_function_tree): Do tail call after mustalias.

2003-12-04  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (opf_none, opf_is_def, opf_no_vops): Change to #define.

2003-12-04  Canqun Yang  <canqun@nudt.edu.cn>

	* stor-layout.c (update_alignment_for_field): Export.
	* tree.h (update_alignment_for_field): Declare.

2003-12-03  Andrew Haley  <aph@redhat.com>

	* tree-eh.c (tree_could_trap_p): Add division instructions.
	* expr.c (expand_expr): Check the EH region of an expression and
	mark all the insns that result from its expansion with the
	appropriate REG_EH_REGION.

2003-12-03  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (verify_addr_expr, verify_stmt, tree_node_shared_p,
	verify_stmts):  New functions.
	(verify_flow_info): Remove PHI checking code.
	* tree-flow.h (verify_stmt, verify_stmts): Declare.
	* tree-inline.h (walk_tree, walk_tree_without_duplicates): Move
	prototypes ...
	* tree.h (walk_tree, walk_tree_without_duplicates): ... here.

2003-12-03  Jan Hubicka  <jh@suse.cz>
	    Diego Novillo <dnovillo@redhat.com>

	* tree-ssa.c (verify_def, verify_use, verify_phi_args): New static
	functions.
	(verify_ssa): New global function.
	* tree-flow.h (verify_ssa): Declare.
	* tree-optimize.c (optimize_function_tree): Call it.

2003-12-03  Diego Novillo  <dnovillo@redhat.com>

	* timevar.def (TV_TREE_SSA_VERIFY): New timer.
	* tree-sra.c (create_scalar_copies): Always mark the previous
	variables on the LHS for renaming.
	Do not emit unnecessary assignments from VA_ARG_EXPRs.
	(scalarize_modify_expr): Similarly, when scalarizing the LHS of a
	COMPONENT_REF assignment.
	* tree-must-alias.c (tree_compute_must_alias): Do not promote
	variables with hidden uses.
	* tree-ssa-ccp.c (set_rhs): When replacing the whole statement, reset
	SSA_NAME_DEF_STMT for all the SSA_NAMEs in vdef and def
	operands.

2003-12-03  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
	    Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (opf_no_vops): New.
	(add_stmt_operand): Don't create virtual operands when opf_no_vops
	is passed in flags.
	(get_expr_operands): Set opf_no_vops flag before diving into the
	operand of an ADDR_EXPR node.

2003-12-03  Richard Henderson  <rth@redhat.com>

	* tree-simple.c (is_gimple_min_invariant): Disallow offset of
	address of a scalar.

	* c-parse.in (primary): Set STMT_LINENO on STMT_EXPR.
	* c-simplify.c (gimplify_stmt_expr): Be prepared for last_stmt
	to be null.

2003-12-03  Daniel Berlin  <dberlin@dberlin.org>

	Fix PR 13177
	* tree-ssa-pre.c (code_motion): Do phi nodes last, and rearrange
	how we decide what temporary to choose so that we get it right.

2003-12-03  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-dfa.c (get_expr_operands): Don't record VUSEs for invariant
	adresses.

2003-12-03  Brian Booth  <bbooth@redhat.com>

	* tree-pretty-print.c (dump_phi_nodes): Removed superfluous ampersand.

2003-12-03  Jeff Law  <law@redhat.com>

	* ggc-page.c: Resync with mainline sources.  Remove tree-ssa
	specific hack which disabled special GC pagesizes for 2 operand
	tree expressions.

	* tree-ssa.c (mark_def_sites): Call prepare_operand_for_rename
	on the VDEF_RESULT as well, providing a dummy uid argument.

	* tree-phinodes.c: Include rtl.h for ceil_log2.
	(ideal_phi_node_len): New function.
	(resize_phi_node): Make static.
	(make_phi_node): Use ideal_phi_node_len.
	(add_phi_arg): Likewise.
	* tree.h (resize_phi_node): Remove prototype.
	* Makefile.in (tree-phinodes.o): Depend on $(RTL_H).

2003-12-03  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c: (make_edges): Eliminate fallthru to exit.
	(make_ctrl_stmt_edges): Nonlocal goto handling moved to
	make_goto_expr_edges.
	(make_goto_expr_edges): Remove simple gotos.
	(cfg_remove_useless_stmts_bb): Goto removal cancelled.
	(cleanup_cond_expr_graph, cleanup_switch_expr_graph):
	Replaced by ...
	(cleanup_control_expr_graph): New.
	(cleanup_control_flow): Use it.
	(disband_implicit_edges): New.
	(tree_find_edge_insert_loc): Never insert before a control statement.
	(tree_split_edge, thread_jumps, tree_try_redirect_by_replacing_jump,
	tree_redirect_edge_and_branch): Work over no-gotos form.
	(tree_verify_flow_info): Check no-gotos form invariants.
	* tree-pretty-print.c (pp_cfg_jump, dump_implicit_edges): New.
	(dump_generic_bb_buff): Call dump_implicit_edges.
	* tree-flow.h (cleanup_cond_expr_graph, cleanup_switch_expr_graph):
	Declaration removed.
	(cleanup_control_expr_graph, delete_tree_ssa, disband_implicit_edges):
	Declare.
	* tree-optimize.c (tree_ssa_finish): New.
	(optimize_function_tree): Call it.
	* tree-ssa-dom.c (thread_jumps_walk_stmts, optimize_stmt): Use
	cleanup_control_expr_graph.
	* tree-ssa.c (delete_tree_ssa): Export, work even if there are no
	referenced_vars.
	(rewrite_out_of_ssa): Don't call it.

2003-12-03  Jan Hubicka  <jh@suse.cz>

	* tree-ssa.dom.c (tree_ssa_domionator_thread_jumps): Mark back edges.
	(thread_across_edge): Do not thread across loop headers.

	* Makefile.in (tree-optimize.o): Depend on cgraph.h
	* cgraph.h (cgraph_preserve_function_body_p): Declare.
	* cgraphunit.c (cgraph_preserve_function_body_p): New function.
	* tree-optimize.c: Include cgraph.h
	(clear_decl_rtl): Kill.
	(tree_rest_of_compilation): Use cgraph_preserve_function_body_p;
	do not clear DECL_RTL; do final ggc in the pushed context for nested
	functions;

2003-12-02  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_stmt): Accept and pass down dominator
	walker structure instead of individual varrays.  Callers updated.
	(eliminate_redundant_computations): Likewise.
	(simplify_rhs_and_lookup_avail_expr): Likewise.  Cache and update
	a dummy COND_EXPR when querying the hash tables when transforming
	DIV/MOD into RSHIFT/BIT_AND or ABS_EXPR into NEG_EXPR.
	(dom_opt_walk_stmts): Don't reload the block data pointer each
	iteration of the loop.  Load it once outside the loop.

	* tree-dfa.c (cleanup_operand_arrays): Avoid creating a new
	varray for the vuse operands.

	* tree-ssa-dom.c (extract_range_from_cond): Use int_const_binop to
	avoid creating useless tree nodes.

	* tree-phinodes.c (add_phi_arg): If we receive a new node from
	resize_phi_node, then release the old node and update the PHI
	chain.

2003-12-02  Brian Booth  <bbooth@redhat.com>

	* tree-pretty-print.c (dump_phi_nodes): Added code to always show phi
	nodes of regular gimple scalars.
	(dump_generic_bb_buff): Removed condition upon which to show phi nodes.

2003-12-02  Jan Hubicka  <jh@suse.cz>

	* tree-optimize.c (optimize_function_tree): Invoke ggc_collect in
	between optimization passes.

2003-12-02  Daniel Berlin  <dberlin@dberlin.org>

	* tree-sra.c (can_be_scalarized_p): Print details about why something
	could not be scalarized to the dump file.

2003-12-01  Jeff Law  <law@redhat.com>

	* Makefile.in (OBJS-common): Add tree-phinodes.o.
	(tree-phinodes.o): Add dependencies.
	(GTFILES): Add tree-phinodes.c.
	* tree-phinodes.c: New file.
	* tree-dfa.c (create_phi_node): Moved to tree-phinodes.o.
	(add_phi_arg, remove_phi_arg, remove_phi_arg_num): Similarly.
	(remove_phi_node, remove_all_phi_nodes_for): Similarly.
	* tree-ssa.c (init_tree_ssa): Initialize PHI node management.
	(delete_tree_ssa): Finalize PHI node management.
	* tree.c (dump_tree_statistics): Dump PHI node stats.
	(make_phi_node, resize_phi_node): Moved to tree-phinodes.o.
	* tree.h (init_phinodes): Prototype.
	(fini_phinodes, release_phi_node): Likewise.
	(phinodes_print_statistics): Likewise.

2003-12-01  Richard Henderson  <rth@redhat.com>

	* tree-dfa.c (get_expr_operands): Don't handle PLUS_EXPR inside
	INDIRECT_REF.
	* tree-ssa-ccp.c (maybe_fold_offset_to_array_ref): Use int_const_binop.
	(maybe_fold_offset_to_component_ref): Likewise.
	(maybe_fold_stmt_indirect): Likewise.
	(maybe_fold_stmt_plus): Expand ARRAY_REF when seen with addend.
	* fold-const.c (int_const_binop): Export.
	* tree.h (int_const_binop): Declare.

2003-12-01  Jan Hubicka  <jh@suse.cz>

	* basic-block.h (tree_phi_root): New variable.
	* cfg.c: Include tree-flow.h.
	(compact_blocks): Compact tree_phi_root
	* tree-cfg.c (build_tree_cfg): Initialize tree_phi_root.
	(create_bb, remove_bb, delete_tree_cfg): Update tree_phi_root.
	* tree-dfa.c (tree_phi_root): Declare.
	(create_phi_node, add_phi_arg, remove_phi_node,
	remove_all_phi_nodes_for):  Always use accessor functions for
	getting, varray for setting phis.
	* tree-ssa-pre.c (code_motion): Likewsie.
	* tree-flow-inline.h (phi_nodes): Use varray.
	* tree-flow.h (bb_ann_d): Remove phi_nodes.

	* tree-ssanames.c (free_ssanames): Do not use deleteable GTY flag.

2003-11-30  Jan Hubicka  <jh@suse.cz>

	* tree-optimize.c (tree_rest_of_compilation): Move ggc_collect call to
	the end of function; keep clearing of DECL_SAVED_TREE to the cgraph
	code.

2003-11-30  Jan Hubicka  <jh@suse.cz>

	* cgraphunit.c (cgraph_inline_context): New structure.
	(cgrpah_mark_inline, cgraph_check_inline_limits): Use context
	instead of passing all arguments by hand.
	(cgraph_create_inline_context, cgraph_free_inline_context,
	cgraph_inline_context_set_caller, cgraph_inline_context_clear_caller,
	cgraph_inline_context_set_callee, cgrpah_inline_context_clear_callee,
	cgraph_recursive_inlining_p): New static function.
	(cgraph_decide_inline*):  Reorganize to use context.

2003-11-30  Paul Brook  <paul@nowt.org>

	* Makefile.in (GTFILES): Remove stray '\'.

2003-11-30  Daniel Berlin  <dberlin@dberlin.org>

	* c-config-lang.in: Move tree-alias-* from here
	* Makefile.in (GTFILES): To here.
	* tree-alias-ander.c: Include bitmap.h
	(andersen_function_call): Updated to take address of variables
	in an ADDR_EXPR in a CALL_EXPR.
	* tree-alias-common.h (struct tree_alias_ops): Update arguments to
	function_call.
	* tree-alias-type.h (struct alias_typevar_common): Add varnum.
	* tree-alias-common.c: Include bitmap.h, and function.h.
	s/global_var/pta_global_var/g.
	(addrargs): New static variable.
	(pta_global_var): Ditto.
	(find_func_decls): Remove.
	(find_func_aliases): Take one argument, update all callers.
	Handle (cast) [addr-expr] [var].
	Handle COMPONENT_REF of an  INDIRECT_REF.
	Pass info about ADDR_EXPR arguments to function_call function.
	(deal_with_call_aliasing): New function.
	(call_may_return): New function.
	(get_alias_var_decl): Call find_func_aliases on the DECL_INITIAL
	of a global var.
	Use ALIAS_TVAR_VARNUM, instead of VARRAY_ACTIVE_SIZE (alias_vars) - 1.
	(get_alias_var): Handle REALPART_EXPR and IMAGPART_EXPR.
	Return NULL in default case.
	(intra_function_call): Remove wrong code.
	(create_fun_alias_var): Use simple_assign, not addr_assign.
	Set up ALIAS_TVAR_VARNUM when creating an alias var.
	(create_fun_alis_var_ptf): Ditto on ALIAS_TVAR_VARNUM.
	(create_alias_var): Ditto.
	(create_alias_vars):  Build pta_global_var here.
	Walk unexpanded_var_list.
	Walk the statements in basic blocks.
	(delete_alias_vars): Correct ip_partial case.
	Free addrargs.
	(init_alias_vars): Create addrargs.

2003-11-29  Jan Hubicka  <jh@suse.cz>

	* Makefile.in (tree-ssanames.o): Depend on gt-tree-ssanames.h.
	(tree-eh.o): Depend on gt-tree-eh.h.
	(gr-tree-ssanames.h, gt-tree-eh.h): New targets.
	(GTFILES): Add tree-ssanames.c, tree-eh.c
	* tree-eh.c: Include ggc.h and gt-tree-eh.h
	(lower_eh_constructs): Allecate throw_stmt_table in ggc.
	* tree-ssanames.c: Include ggc.h and gt-tree-ssanames.h

	* function.h (struct function): Add saved_tree/saved_args.
	* toplev.c (rest_of_compilation): Move code to  clear cfun and
	DECL_SAVED_INSNS and call to ggc_collect to ...
	* tree-optimize.c (tree_rest_of_compilation): ... this function. Use
	cfun to save/restore function body.

2003-11-28  Richard Henderson  <rth@redhat.com>

	* gimplify.c (create_tmp_var_raw): Split out from create_tmp_var.
	(create_tmp_var): Use it.
	(create_tmp_alias_var): Remove.
	* tree-alias-common.c, tree-dfa.c: Use create_tmp_var_raw instead.
	* tree-simple.h: Update decls.

2003-11-28  Richard Henderson  <rth@redhat.com>

	* gimple-low.c (lower_function_body): Call lower_bind_expr
	to handle the outermost BIND_EXPR.

2003-11-28  Jan Hubicka  <jh@suse.cz>

	* tree-ssa.c (remove_annotations_r): Kill.
	(delete_tree_ssa): Remove annotations using statement walk;
	kill argument fndecl.
	(rewrite_out_of_ssa): Update call.

2003-11-27  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-live.c (register_ssa_partition): Abort if a virtual SSA
	version is registered.
	(create_ssa_var_map): Always process PHI nodes.
	* tree-ssa.c (Eliminate_virtual_phis): Rename from
	eliminate_extraneous_phis, and look specifically for virtuals.
	(rewrite_out_of_ssa): Eliminate virtual PHI nodes before building
	partitions.

2003-11-27  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa-ccp.c (get_strlen): Mark the visited variables.
	(ccp_fold_builtin): Changed due to changed calling convention of
	get_strlen.

2003-11-26  Diego Novillo  <dnovillo@redhat.com>

	Revert

	2003-11-25  Jeff law  <law@redhat.com>

	    * Makefile.in (OBJS-common): Add tree-phinodes.o.
	    (tree-phinodes.o): Add dependencies.
	    * tree-phinodes.c: New file.
	    * tree-dfa.c (create_phi_node): Moved to tree-phinodes.o.
	    (add_phi_arg, remove_phi_arg, remove_phi_arg_num): Similarly.
	    (remove_phi_node, remove_all_phi_nodes_for): Similarly.
	    * tree-ssa.c (init_tree_ssa): Initialize PHI node management.
	    (delete_tree_ssa): Finalize PHI node management.
	    * tree.c (dump_tree_statistics): Dump PHI node stats.
	    (make_phi_node, resize_phi_node): Moved to tree-phinodes.o.
	    * tree.h (init_phinodes): Prototype.
	    (fini_phinodes, release_phi_node): Likewise.
	    (phinodes_print_statistics): Likewise.

2003-11-25  Jan Hubicka  <jh@suse.cz>

	* tree-mustalias.c (promote_var): Do not clear
	may_point_to_global_mem.

2003-11-25  Jeff law  <law@redhat.com>

	* domwalk.c (walk_dominator_tree): Indicate to the block local
	data initializer if the block local data is new or recycled.
	* domwalk.h (struct dom_walk_data): Corresponding changes.
	* tree-ssa-dom.c (dom_opt_initialize_block_local_data): Accept and use
	"recycled" argument.  For recycled structures, only clear varrays
	that have been initialized.  For new blocks, do not initialize
	varrays here.
	(dom_opt_finalize_block): When threading across edges, if the
	true/false varrays have not been initialized, then the limit is zero.
	Only clear block local varrays that have been initialized.
	(record_equivalences_from_incoming_edge): If necessary, initialize
	block local const_and_copies.
	(dom_opt_walk_stmts): If necessary, initialize block local
	stmts_to_rescan.
	(record_var_is_nonzero): If necessary, initialize block local
	nonzero_vars.
	(record_cond_is_true): If necessary, initialize block local
	true_exprs.
	(record_cond_is_false): If necessary, initialize block local
	false_exprs.
	(lookup_avail_expr): If necessary, initialize block local
	avail_exprs.
	(record_range): If necessary, initialize block local vrp_varaibles.
	* tree-ssa.c
	* tree-ssa.c (rewrite_initialize_block_local_data): Accept and use
	"recycled" argument.  For recycled structures, only clear varrays
	that have been initialized.  For new blocks, do not initialize
	varrays here.
	(rewrite_finalize_block): Only clear block local varrays that have
	been initialized.
	(register_new_def): If necessary, initialize block local defs.

	* tree-ssa-dom.c (get_eq_expr_value): Return a struct rather than
	a tree node.
	(record_equivalences_from_incoming_edge): Corresponding changes.
	(find_equivalent_equality_comparison): Use tree_int_cst_XXX rather
	then building and folding nodes.
	(simplify_cond_and_lookup_avail_expr): Likewise.

	* Makefile.in (OBJS-common): Add tree-phinodes.o.
	(tree-phinodes.o): Add dependencies.
	* tree-phinodes.c: New file.
	* tree-dfa.c (create_phi_node): Moved to tree-phinodes.o.
	(add_phi_arg, remove_phi_arg, remove_phi_arg_num): Similarly.
	(remove_phi_node, remove_all_phi_nodes_for): Similarly.
	* tree-ssa.c (init_tree_ssa): Initialize PHI node management.
	(delete_tree_ssa): Finalize PHI node management.
	* tree.c (dump_tree_statistics): Dump PHI node stats.
	(make_phi_node, resize_phi_node): Moved to tree-phinodes.o.
	* tree.h (init_phinodes): Prototype.
	(fini_phinodes, release_phi_node): Likewise.
	(phinodes_print_statistics): Likewise.

2003-11-25  Jan Hubicka  <jh@suse.cz>

	* tree-inline.c (save_body): New body
	* tree-inline.h (save_body): Declare.
	* tree-optimize.c (tree_rest_of_compilation): Save function tree
	properly.

2003-11-24  Richard Henderson  <rth@redhat.com>

	* gimplify.c (canonicalize_addr_expr): New.
	(gimplify_conversion): Use it.  Canonicalize after nop cast removal.
	* tree-simple.c (is_gimple_min_invariant): Remove STRING_CST cast
	special case.

2003-11-24  Jeff Law  <law@redhat.com>

	* flow.c (count_or_remove_death_notes_bb): New.  Extracted from
	count_or_remove_death_notes.
	(count_or_remove_death_notes): Use EXECUTE_IF_SET_IN_SBITMAP.

2003-11-24  Richard Henderson  <rth@redhat.com>

	PR 13174, PR 13143
	* gimplify.c (cpt_same_type): Allow different ARRAY_TYPEs with
	the same base type.

2003-11-24  Daniel Berlin  <dberlin@dberlin.org>

	Fix PR/13163
	* tree-ssa-pre.c (append_eref_to_block): Delete.
	(insert_euse_in_preorder_dt_order_1): Ditto.
	(insert_one_operand): Take an extra argument, because
	avdefs may need to be changed.
	(clear_all_eref_arrays): Use FOR_ALL_BB.
	(insert_occ_in_preorder_dt_order): Stop appending to bb eref arrays.
	Use FOR_ALL_BB.
	(insert_euse_in_preorder_dt_order): Rewrite to just build a new varray
	with only the EPHI's and EUSE's, and then sort it.
	(pre_expression): Don't use bb based erefs array when printing
	expressions.
	(split_critical_edges): Just use FOR_ALL_BB.
	(tree_perform_ssapre): Pre-split entry block successor edge if the
	successor block has multiple preds.

	* tree-flow.h (struct bb_ann_d): Remove erefs varray.

2003-11-24  Daniel Berlin  <dberlin@dberlin.org>

	* tree-cfg.c (cleanup_tree_cfg): FOR_EACH_BB -> FOR_ALL_BB when
	clearing dom children, because the entry block has dom_children
	too.
	* tree-ssa.c (build_dominator_tree): Ditto.

2003-11-24  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (compute_dominance_frontiers_1,
	compute_dominance_frontiers): Move from ssa.c.
	* tree-flow.h (compute_dominance_frontiers): Declare.
	* Makefile.in (tree-ssa.o, tree-ssa-live.o, tree-ssa-pre.o,
	tree-optimize.o): Don't depend on ssa.h.
	* tree-ssa.c: Don't include ssa.h.
	* tree-ssa-live.c: Likewise.
	* tree-ssa-pre.c: Likewise.
	* tree-optimize.c: Likewise.

2003-11-24  Jan Hubicka  <jh@suse.cz>

	* fold-const.c (fold):  Do not return early when
	optimizing COMPONENT_REF and constant.

2003-11-24  Richard Henderson  <rth@redhat.com>

	* objc/objc-act.c (build_protocol_expr): Use convert instead of
	smashing TREE_TYPE.

2003-11-23  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-live.h (SSANORM_PERFORM_TER, SSANORM_COMBINE_TEMPS,
	SSANORM_REMOVE_ALL_PHIS): New flag macros.
	* tree-ssa.c (replace_variable): Return true if var was rewritten.
	(eliminate_extraneous_phis): Dump var map to file if checking triggers
	an abort.
	(rewrite_trees): Set modified_stmt if stmt was changed.
	(remove_ssa_form): Move more of rewrite_out_of_ssa to make it serve
	all the same functions based on new flags in tree-ssa-live.h.
	(rewrite_out_of_ssa): Call remove_ssa_form.

2003-11-23  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (tree_verify_flow_info): Check that ENTRY/EXIT block
	has no instructions associated with it.

2003-11-22  Jeff Law  <law@redhat.com>

	* tree-ssa-names.c (release_ssa_name): Use SSA_NAME_IN_FREE_LIST
	instead of checking SSA_NAME_DEF_STMT being null.
	* tree.h (SSA_NAME_DEF_STMT): Use chain field rather than the
	def_stmt field.
	(SSA_NAME_OCCURS_IN_ABNORMAL_PHI): Use existing flag from tree_common.
	(SSA_NAME_IN_FREE_LIST): Define.
	(struct tree_ssa_name): Kill DEF_STMT and OCCURS_IN_ABNORMAL_PHI fields.

2003-11-22  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-pretty-print.c (dump_generic_node): Remove superfluous ';'.

2003-11-22  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (simple-break-elim.o): Remove.
	(simple-goto-elim.o): Remove.
	(tree-dchain.o): Remove.
	* simple-break-elim.c: Remove.
	* simple-goto-elim.c: Remove.
	* tree-dchain.c: Remove.
	* tree-dchain.h: Remove.

2003-11-22  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (build_dfs_id_array_1): > should be >=
	(build_dfn_array): Ditto.

2003-11-21  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (tree-dfa.o): Add dependency on $(TREE_DUMP_H)
	* tree-dfa.c: Include tree-dump.h
	(compute_alias_sets): Call dump_function_to_file.
	(may_access_global_mem_p): Check if the base address of _REF nodes
	may point to global memory.

	* cfgcleanup.c (try_crossjump_to_edge): Initialize newpos1 and
	newpos2.

2003-11-21  Jeff Law  <law@redhat.com>

	Revert:

	2003-11-21  Jan Hubicka  <jh@suse.cz>

		* tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR.
		* tree-must-alias.c (tree_compute_must_alias): promote pointers.
		(find_addressable_vars):  Deal with complex constant
		expressions; do not clear may_point_to_global_mem.

2003-11-21  Jeff Law  <law@redhat.com>

	* Makefile.in (domwalk.o): Depend on $(GGC_H).
	* domwalk.c: Include ggc.h.
	(walk_dominator_tree): Manage allocation/deallocation and
	pushing/popping of the toplevel block data pointer here.
	Use callback to initialize the block local data.
	(init_walk_dominator_tree): New function.
	(fini_walk_dominator_tree): Likewise.
	* domwalk.h (struct dom_walk_data): Add callback to initialize
	block local data.  Add field for sizeof block local data.
	Add "private" field free_block_data.
	(init_dominator_tree, fini_dominator_tree): Prototype.
	* tree-ssa-dom.c (dom_opt_initialize_local_data): New function.
	(tree_ssa_dominator_optimize_1): Initialize new fields in the
	dominator walker structure.  Initialize and finalize the dominator
	walker.  Slightly reorder code to make it more readable..
	(dom_opt_initialize_block): No longer deal with allocation and
	initialization of block local data.
	(dom_opt_finalize_block): Similarly for deallocation of block
	local data.
	* tree-ssa.c (rewrite_block_data): New structure.
	(rewrite_initialize_block_local_data): New function.
	(rewrite_initialize_block): No longer deal with allocation and
	initialization of block local data.
	(rewrite_into_ssa): Initialize new fields in the dominator walker
	structure.  Initialize and finalize the dominator walker.
	(rewrite_initialize_block): No longer deal with allocation and
	initialization of block local data.
	(rewrite_optimize_stmts): Deal with changes in the dominator
	walker structure.
	(rewrite_finalize_block): No longer with deallocation of block
	local data.

	* tree-dfa.c (add_vdef, cleanup_voperand_arrays): Use NUM_VDEFS.
	(mark_new_vars_to_rename, collect_dfa_status_r): Likewise.
	* tree-pretty-print.c (dump_vops): Likewise.
	* tree-sra.c (create_scalar_copies): Likewise.
	* tree-ssa-dce.c (stmt_useful_p, process_worklist): Likewise.
	* tree-ssa-live.c (create_ssa_var_map): Likewise.
	(calculate_live_on_entry): Likewise.
	* tree-ssa-pre.c (process_left_occs_and_kills): Likewise.
	* tree-ssa.c (mark_def_sites, rewrite_stmt): Likewise.
	* tree.h (NUM_VDEFS): Define.
	* tree-ssa-ccp.c (visit_stmt): Use NUM_VDEFS.  Fix thinko in last
	change.
	(initialize): Use NUM_VDEFS.

	* tree-dfa.c (add_vdef): Revamp to handle new method for
	recording vdefs.
	(cleanup_operand_arrays): Similarly.
	* tree-sra.c (create_scalar_copies): Similarly.
	* tree-ssa-ccp.c (visit_stmt, initialize): Similarly.
	* tree-ssa-dce.c (stmt_useful_p, process_worklist): Similarly.
	* tree-ssa-dom.c (cprop_into_stmt): Similarly.
	(record_equivalences_from_stmt): Similarly.
	* tree-ssa-live.c (create_ssa_var_map): Similarly.
	(calculate_live_on_entry): Similarly.
	* tree-ssa.c (mark_def_sites, rewrite_stmt): Similarly.
	* tree-ssa-pre.c (process_left_occr_and_kills): Similarly.
	* tree-inline.c (estimate_num_insns_1): Kill VDEF_EXPR.
	* tree-pretty-print.c (dump_generic_node) Kill VDEF_EXPR.
	(dump_vops): Dump VDEFs here.
	* tree.c (build_vdef_expr): Kill.
	* tree.h (build_vdef_expr): Kill prototype.
	(VDEF_RESULT, VDEF_OP): Revamp to handle new method for recording
	vdefs.
	* tree.def (VDEF_EXPR): Kill.

	* tree-cfg.c (cfg_remove_useless_stmts): Set both VAR and VAL to
	NULL anytime one of them is determined to be invalid.

2003-11-21  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-live.c (compact_var_map): Fix typo.  Clear correct field.
	(calculate_live_on_entry): Remove unneeded stmt.
	* tree-ssa-live.h (version_to_var): New.  Return variable associated
	with a specific SSA version.
	* tree-ssa.c (eliminate_build): Add check that ignored results don't
	have important arguments.  Allow ignored results.
	(coalesce_abnormal_edges): Allow non-relevant results to be ignored.
	(eliminate_extraneous_phis): Allow non-relevant results.  Check that
	no important arguments are being missed.
	(coalesce_vars): Non-partition variables are allowed now, just ignored.
	(rewrite_trees): New.  Split out from rewrite_out_of_ssa.  Perform tree
	rewriting step.
	(remove_ssa_form): New.  Allow rewriting of just specified variables.
	(rewrite_out_of_ssa): Use rewrite_trees and reorganize slightly to
	accommodate typechecking in eliminate_extraneous_phis.

2003-11-21  Jan Hubicka  <jh@suse.cz>

	* tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR.
	* tree-must-alias.c (tree_compute_must_alias): promote pointers.
	(find_addressable_vars):  Deal with complex constant expressions;
	do not clear may_point_to_global_mem.

2003-11-21  Jan Hubicka  <jh@suse.cz>

	* parser.c (cp_parser_postfix_expression): Initialize 's' to
	NULL_TREE.

2003-11-20  Richard Henderson  <rth@redhat.com>

	* Makefile.in (bitmap.o-warn, caller-save.o-warn, combine.o-warn,
	cgraphunit.o-warn, c-semantics.o-warn, emit-rtl.o-warn, expr.o-warn,
	fold-const.o-warn, genattrtab.o-warn, regmove.o-warn, tree.o-warn,
	varasm.o-warn, f/expr.o-warn, profile.o-warn): Remove.
	* bitmap.c (bitmap_first_set_bit): Abort if no non-zero word found.
	(bitmap_last_set_bit): Likewise.
	* combine.c (get_pos_from_mask): Always set *plen.

2003-11-20  Richard Henderson  <rth@redhat.com>

	* tree-dfa.c (get_expr_operands): Remove handling of PLUS_EXPR
	inside INDIRECT_REF.

2003-11-20  Diego Novillo  <dnovillo@redhat.com>

	* tree-nomudflap.c (nogo): Fix prototype.

2003-11-20  Richard Henderson  <rth@redhat.com>

	* except.c (output_function_exception_table): Strip nops.
	* gimplify.c (gimplify_addr_expr): Kill missing cast workaround.
	(cpt_same_type, check_pointer_types_r): New.
	(gimplify_body): Call it.
	* tree-inline.c (insert_decl_map): New.
	(remap_decl, remap_type, remap_block, copy_body_r,
	initialize_inlined_parameters, declare_return_variable,
	remap_save_expr, mark_local_for_remap_r): Use it.

2003-11-20  Frank Ch. Eigler  <fche@redhat.com>

	libstdc++/11696
	* c-pragma.c (handle_pragma_redefine_extname): Define always.
	(init_pragma): Activate #pragma redefine_extname for mudflap.

	* tree-inline.c (copy_tree_r): Propagate mf_marked-ness.
	* tree-mudflap.c (mudflap_c_function): Break into new
	_decls and _ops functions.
	(mudflap_c_function_decls): Avoid unnecessary tree copying.
	(mudflap_c_function_ops): Ditto.  Gimplify explicitly only for
	tree dumping.
	* tree-nomudflap.c: Add new stub functions.  Simplify error
	message emission throughout.
	* tree-mudflap.h: Corresponding changes.
	* tree-optimize.c (tree_rest_of_compilation): Call the _decl
	instrumentation before gimplification and ssa optimizations;
	call the _ops instrumentation after ssa optimizations.

2003-11-20  Diego Novillo  <dnovillo@redhat.com>

	Initial fix for PR optimization/12747

	* Makefile.in (OBJS): Add tree-sra.o
	* common.opt (ftree-sra): Add.
	* flags.h (flag_tree_sra): Declare.
	* gimplify.c (gimplify_addr_expr): Set TREE_INVARIANT
	when producing and address expression for a DECL node.
	* opts.c (decode_options): Enable SRA at -O1.
	(common_handle_option): Handle -ftree-sra.
	* timevar.def (TV_TREE_SRA): New timer.
	* toplev.c (flag_tree_sra): Define.
	* tree-cfg.c (stmt_ends_bb_p): Declare extern.
	(bsi_replace): Add boolean argument to specify whether to
	preserve EH region information.  Update all callers.
	(bsi_commit_edge_inserts): Also check the edge from ENTRY_BLOCK_PTR
	to basic block 0.
	Move loop body ...
	(bsi_commit_edge_inserts_1): ... here.
	* tree-dump.c: Add dump for SRA pass.
	* tree.h (enum tree_dump_index): Modify accordingly.
	(STRIP_USELESS_TYPE_CONVERSION): Define.  Update all callers to
	tree_ssa_useless_type_conversion.
	* tree-eh.c (add_stmt_to_eh_region): New function.
	* tree-flow.h (stmt_ends_bb_p): Declare.
	(add_stmt_to_eh_region): Declare.
	(tree_sra): Declare.
	(enum bsi_iterator_update): Mirror entries in
	enum tsi_iterator_update.
	* tree-optimize.c (optimize_function_tree): Call SRA pass
	after must-alias.
	* tree-sra.c: New file.
	* doc/invoke.texi: Document -ftree-sra and -fdump-tree-sra.

2003-11-20  Andrew Macleod  <amacleod@redhat.com>

	* tree-ssa.c (check_replaceable): Return false if the LHS is a
	DECL_HARD_REGISTER.

2003-11-20  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-ccp.c (set_rhs): Replace with an empty statement when
	the replacement has no side effects.

2003-11-20  Jeff Law  <law@redhat.com>

	* Makefile.in (OBJS-common): Kill tree-ssa-copyprop.o.
	(tree-ssa-copyprop.o): Kill dependencies clause.
	* common.opt (tree-copyprop): Kill option.
	* flags.h (flag_tree_copyprop): Kill.
	* opts.c (decode_options): Don't set flag_tree_copyprop.
	(common_handle_option): Kill handling of -ftree-copyprop.
	* timevar.def (TV_TREE_COPYPROP): Kill.
	* toplev.c (flag_tree_copyprop): Kill.
	(lang_independent_options): Kill -ftree-copyprop.
	* tree-dump.c (dump_files): Kill .copyprop dump.
	* tree-flow.h (tree_ssa_copyprop): Kill prototype.
	(propagate_copy): Move prototype.
	* tree-optimize.c (optimize_function_tree): Kill -ftree-copyprop stuff.
	* tree.h (tree_dump_index): Kill TDI_copyprop.
	* tree-ssa-copyprop.c: Kill.
	* tree-ssa-dom.c (propagate_copy): Moved here from tree-ssa-copyprop.c.

	* tree-ssanames.c (free_ssanames): No longer a varray.
	(init_ssanames, make_ssa_name, release_ssa_name): Corresponding changes.

2003-11-20  Steven Bosscher  <stevenb@suse.de>

	* tree-ssanames.c (ssanames_print_statistics): Use ISO function
	declaration.  Print unsigned ints, not usinged longs.

2003-11-18  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (rename_1): This should be static.
	(append_eref_to_block): Don't gc allocate.
	(clear_all_eref_arrays): Free the array rather than
	clear them.
	(rename_1): Ditto on both counts.
	(free_expr_info): Free the arrays.
	(collect_expressions): Don't gc allocate the arrays.

2003-11-18  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (insert_one_operand): Handle self-referential
	ephi's properly.

2003-11-19  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (true_exprs, false_exprs): New hash tables.
	(nonzero_vars): New varray.
	(dom_walk_block_data): Add true_exprs, false_exprs and nonzero_vars.
	(get_value_for, set_value_for): Accept additional argument indicating
	which table to use.  Callers updated.
	(tree_ssa_dominator_optimize_1): Initialize and wipe our new hash
	tables and varray appropriately.
	(dom_opt_initialize_block): Initialize new block local varrays for
	true expressions, false expressions and nonzero vars.  Update call
	to record_equivalences_from_incoming_edge.
	(dom_opt_finalize_block): Put equivalences from taken edges
	into the true_exprs and false_exprs hash tables.  Restore global
	state for true_exprs, false_exprs and nonzero_vars  too.
	(record_equivalences_from_incoming_edge): Accept dom_walk structure
	instead of a gazillion varrays.  Pass down block local
	true_exprs, false_exprs and nonzero_vars varrays to various children.
	(optimize_stmt):  Accept block local nonzero_vars argument.  Pass
	new varrays down to record_equivalences_from_stmt.
	(thread_jumps_walk_stmt): Pass new varrays down to
	record_equivalences_from_stmt.
	(dom_opt_walk_stmt): Pass new varrays down to optimize_stmt.
	(dump_dominator_optimizer_statistics): Dump new hash tables.
	(record_cond_is_true, record_cond_is_false): Record info into
	the true/false hash tables/varrays instead of the main expression
	varrays.  Don't create useless tree nodes.
	(record_var_is_nonzero): New function.
	(record_equivalences_from_stmt): Don't generate useless tree nodes.
	(lookup_avail_expr): Consult nonzero_vars and the true/false
	expression tables as well.
	(get_eq_expr_value): Record local true/false expressions in the
	local true/false varrays rather than the main local expression
	varray.
	(true_false_expr_hash, true_false_expr_eq): New functions.

	* Makefile.in (OBJS-sommon): Add tree-ssanames.o.
	(tree-ssanames.o): Add dependencies.
	* tree-dfa.c (remove_phi_node): Release SSA_NAME expression when
	we remove the PHI node.
	(remove_all_phi_nodes_for): Similarly.
	* tree-ssa.c (prepare_operand_for_rename): Similarly when we
	strip away an SSA_NAME expression from an operand.
	(init_tree_ssa): Call the SSA_NAME initializer.
	(delete_tree_ssa): Call the SSA_NAME finalizer.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Clear the
	const_and_copies and vrp_data virtual arrays.
	* tree-ssanames.c: New file for management of SSA_NAME expressions.
	* tree.h: Prototypes for functions exported by tree-ssanames.c.
	* tree-flow.h, tree-ssa-ccp.c, tree-ssa-dce.c: Use highest_ssa_version
	rather than next_ssa_version.
	* tree-ssa-dom.c, tree-ssa-live.c, tree-ssa.c: Similarly.
	* tree.c (dump_tree_statistics): Call into tree-ssaname statistics
	dumper too.
	(make_ssa_name): Kill.  Now in tree-ssanames.c

2003-11-18  Richard Henderson  <rth@redhat.com>

	* tree.c (recompute_tree_invarant_for_addr_expr): Split out from ...
	(build1): ... here.
	* tree.h: Declare it.
	* gimplify.c (gimplify_addr_expr): Use it.
	* tree-ssa-ccp.c (maybe_fold_offset_to_array_ref): Split out
	from fold_indirect_refs_r.
	(maybe_fold_stmt_indirect): Likewise.
	(maybe_fold_offset_to_component_ref): New.
	(maybe_fold_stmt_plus): New.
	(fold_stmt_r): Rename from fold_indirect_refs_r.
	(fold_stmt): Strip more useless type conversions.

2003-11-18  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (dump_function_to_file): Mind when cfun is null.

2003-11-18  Diego Novillo  <dnovillo@redhat.com>

	Revert

	2003-11-18  Jan Hubicka  <jh@suse.cz>

		* tree-cfg.c (cfg_remove_useless_stmts_bb): Avoid crash.
		* tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR.

	2003-11-18  Jan Hubicka  <jh@suse.cz>

		* Makefile.in (sibcall.o): Kill.
		(tree-tailcall.o): Add except.h dependency
		* sibcall.c: Kill.
		(purge_reg_equiv_notes, purge_mem_unchanging_flag): Move to ...
		* calls.c (purge_reg_equiv_notes,
		purge_mem_unchanging_flag) ... here.
		(expand_call): Do not produce placeholders; do
		not deal with tail recursion; update
		equivalencies after sibcall production.
		* toplev.c (rest_of_handle_sibling_calls): Kill.
		(rest_of_compialtion): Do not use rest_of_handle_sibling_calls.
		* tree-dump.c (dump_files): Add tail2
		* tree-flow.h (tree_optimize_tail_calls): Update prototype.
		* tree-optimize.c (optimize_function_tree): Do
		tail optimization twice.
		* tree-tailcall.c: Inlucde except.h
		(suitable_for_tail_call_opt_p): New.
		(optimize_tail_call): Add opt_tailcalls argument;
		optimize tailcalls.
		(tree_optimize_tail_calls): Add opt_tailcalls/pass arguments.
		* tree.h (CALL_EXPR_TAILCALL): New.
		(tree_dump_index): Add tail2

2003-11-18  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (cfg_remove_useless_stmts_bb): Avoid crash.
	* tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR.

2003-11-18  Diego Novillo  <dnovillo@redhat.com>

	* tree-optimize.c (optimize_function_tree): Disable tail
	call optimizations.

2003-11-18  Jan Hubicka  <jh@suse.cz>

	* Makefile.in (sibcall.o): Kill.
	(tree-tailcall.o): Add except.h dependency
	* sibcall.c: Kill.
	(purge_reg_equiv_notes, purge_mem_unchanging_flag): Move to ...
	* calls.c (purge_reg_equiv_notes, purge_mem_unchanging_flag) ... here.
	(expand_call): Do not produce placeholders; do not deal with tail
	recursion; update equivalencies after sibcall production.
	* toplev.c (rest_of_handle_sibling_calls): Kill.
	(rest_of_compialtion): Do not use rest_of_handle_sibling_calls.
	* tree-dump.c (dump_files): Add tail2
	* tree-flow.h (tree_optimize_tail_calls): Update prototype.
	* tree-optimize.c (optimize_function_tree): Do tail optimization twice.
	* tree-tailcall.c: Inlucde except.h
	(suitable_for_tail_call_opt_p): New.
	(optimize_tail_call): Add opt_tailcalls argument; optimize tailcalls.
	(tree_optimize_tail_calls): Add opt_tailcalls/pass arguments.
	* tree.h (CALL_EXPR_TAILCALL): New.
	(tree_dump_index): Add tail2

2003-11-18  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (thread_across_edge): Lose block_avail_exprs argument.
	Callers updated.  Pass NULL for block_avail_exprs in call to
	lookup_avail_expr.  Record both the condition and the inverted
	condition when threading across an edge.

2003-11-18  Richard Henderson  <rth@redhat.com>

	* tree-ssa.c (tree_ssa_useless_type_conversion): Use TYPE_MAIN_VARIANT
	when compariing pointer types too.

2003-11-18  Jan Hubicka  <jh@suse.cz>

	* tree-dump.c (dump_files): Reorder tail calls.
	* tree-optimize.c (optimize_function_tree): Likewise
	* tree-tailcall.c (optimize_tail_call, eliminate_tail_call): Remove
	variable tmpvars; update SSA.
	(suitable_for_tail_opt_p): Do not give up because of static variables.
	(find_tail_calls):  Track return values in SSA graph.
	* tree.c (make-phi_node): Do not create new SSA name when operand
	already is.
	* tree.h (enum tree_dump_index): Reorder tail call.

2003-11-17  Diego Novillo  <dnovillo@redhat.com>

	* gimplify.c (gimplify_call_expr): Change gimple_test_f argument to
	return bool type.
	(mark_decls_volatile_r): New local function.
	(gimplify_expr): Make gimple_test_f return bool type.
	Call mark_decls_volatile_r when gimplifying VA_ARG_EXPR.
	* tree-dfa.c (struct walk_state): Remove field is_va_arg_expr.
	Update all callers.
	(opf_force_vop): Remove.  Update all users.
	(add_stmt_operand): Re-structure to add real operands only for
	GIMPLE register variables.
	(find_vars_r): Don't handle VA_ARG_EXPR nodes.
	(add_referenced_var): Also assign a UID to variables with hidden
	uses.
	Call is_gimple_call_clobbered to determine if a variable is call
	clobbered.
	(get_memory_tag_for): Mark memory tags volatile and static.
	* tree-flow.h (struct var_ann_d): Remove field is_in_va_arg_expr.
	Update all users.
	* tree-simple.c (is_gimple_*): Change return type to bool.  Update
	all users.
	(is_gimple_reg_type): Return true only for non aggregate types.
	(is_gimple_non_addressable_1): New local function.
	(is_gimple_reg): Call it.
	(is_gimple_non_addressable): New function.
	(is_gimple_call_clobbered): New function.
	* tree-simple.h (is_gimple_*): Change return type to bool.

2003-11-17  Jason Merrill  <jason@redhat.com>

	PR c++/11266
	* gimplify.c (gimple_add_tmp_var): Also make sure
	seen_in_bind_expr isn't set.
	(mostly_copy_tree_r): Don't copy a TARGET_EXPR.
	(gimplify_target_expr): Only expand a TARGET_EXPR the first time
	we see it.

2003-11-17  Richard Henderson  <rth@redhat.com>

	* tree-pretty-print.c (dump_generic_node): Use %u not %x for
	printing DECL_UID.

2003-11-16  Richard Henderson  <rth@redhat.com>

	* c-common.c (c_add_case_label): Use create_artificial_label.
	* tree-simple.h (create_artificial_label): Move decl ...
	* tree.h: ... here.

2003-11-16  Richard Henderson  <rth@redhat.com>

	PR c++/12770
	* gimple-low.c (lower_stmt_body): Take a tree, not a tree*.
	(lower_stmt): Handle EH nodes.
	(lower_bind_expr): Remove fixme.
	(block_may_fallthru): Move from tree-eh.c.  Handle COND_EXPR,
	BIND_EXPR, and TRY_FINALLY_EXPR.
	(lower_cond_expr): Use it.
	* tree-eh.c (collect_finally_tree): Ignore COND_EXPR and BIND_EXPR.
	(replace_goto_queue_cond_clause): New.
	(replace_goto_queue_1): Use it.  Split out statement_list handling.
	(replace_goto_queue_stmt_list): New.
	(-block_may_fallthru): Move to gimple-low.c.
	(lower_eh_constructs_1): Ignore BIND_EXPR.
	* tree-flow.h (block_may_fallthru): Declare.

	* tree-dump.c (dump_files): Exchange .eh and .lower passes.
	* tree-optimize.c (tree_rest_of_compilation): Likewise.
	* tree.h (enum tree_dump_index): Likewise.

2003-11-16  Jason Merrill  <jason@redhat.com>

	* gimplify.c (mostly_copy_tree_r): Don't walk into a BLOCK.

	* tree-inline.c (walk_tree): Don't walk into the BIND_EXPR_VARS
	of a BIND_EXPR.
	* c-common.c (c_walk_subtrees): Don't walk into the decl of a
	DECL_STMT.

	PR optimization/11269
	* dwarf2out.c (gen_subprogram_die): Generate a DIE for a named
	return value.
	(loc_descriptor_from_tree): Treat RESULT_DECL like VAR_DECL.
	(add_location_or_const_value_attribute): Likewise.
	(add_bound_info): Likewise.
	(gen_decl_die): Likewise.

2003-11-16  Jason Merrill  <jason@redhat.com>

	* c-pretty-print.c (debug_c_tree): Restore removed fn.
	* diagnostic.h: Declare it.

	* tree-pretty-print.c (dump_generic_node): Use DECL_UID when
	dumping anonymous decls.

2003-11-16  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (last_and_only_stmt): New.
	* tree-flow.h (last_and_only_stmt): Declare.
	* tree-ssa-dom.c (thread_across_edge): Use it.

	* tree-cfg.c (tree_block_forwards_to): Don't check for empty stmts.
	(tree_forwarder_block_p): Likewise.
	* tree-dfa.c (get_stmt_operands): Likewise.
	* tree-ssa-ccp.c (set_rhs): Likewise.
	* tree-ssa-dom.c (optimize_stmt): Likewise.
	* tree-ssa.c (rewrite_stmt): Likewise.

2003-11-16  Richard Henderson  <rth@redhat.com>

	* tree.h (LABEL_DECL_UID): Rename from LABEL_DECL_INDEX.
	* tree-flow.h (bsi_remove): Declare.
	* tree-flow-inline.h (bsi_remove): Move ...
	* tree-cfg.c (set_bb_for_stmt): Don't re-set LABEL_DECL_UID.
	Verify that a label isn't already in a block before adding it.
	(bsi_remove): Move from tree-flow-inline.h, clear bb.
	* tree-pretty-print.c (dump_generic_node): Use LABEL_DECL_UID if set.

2003-11-15  Richard Henderson  <rth@redhat.com>

	* function.c (clear_block_marks): Rename from reorder_blocks_0, export.
	* function.h (clear_block_marks): Declare.
	* gimple-low.c (lower_function_body): Use it.
	(lower_bind_expr): Ensure we don't link blocks into the tree twice.
	* gimplify.c (gimplify_body): Keep old bind_expr at top level if
	possible.

2003-11-14  Richard Henderson  <rth@redhat.com>

	* tree-ssa-pre.c (split_critical_edges): Reimplement.  Call
	tree_split_edge directly.

2003-11-14  Jason Merrill  <jason@redhat.com>

	* tree-eh.c (do_return_redirection): Assign directly to the
	RESULT_DECL of a function which returns in memory.

2003-11-14  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (pre_stats): Add ephis_current member.
	(create_ephi_node): Use xmalloc, not ggc_alloc_tree.
	(clear_all_eref_arrays): Free the ephis here.
	(expr_phi_insertion): Don't append the ephis to the erefs array.
	(insert_occ_in_preorder_dt_order): Move building/freeing of dfn
	array so that it only occurs once per function..
	(rename_1): Ditto on the dfs_id array.
	(ephi_use_pool): New alloc pool.
	(add_ephi_use): Pool allocate these things, rather than
	ggc_alloc'ing them.
	(insert_euse_in_preorder_dt_order_1): Use ephi_at_block to put the
	ephi in the list.
	(pre_expression): Don't PRE when we only have 1 occurrence.
	(expr_lexically_eq): Make inline.
	(names_match_p): Move closer to first use.
	(tree_perform_ssapre): Alloc and free the ephi_use_pool.
	Make stat printing per-expression.
	Add checking that we freed all ephis.

2003-11-14  Andrew MacLeod  <amacleod@redhat.com>

	* common.opt (ftree-ter): Document new option.
	* flags.h (flag_tree_ter): Add new flag.
	* fold-const.c (invert_truthvalue): Don't ignore cast to BOOLEAN_TYPE.
	* opts.c (decode_options): Option -ftree-ter defaults to on.
	(common_handle_option): Add processing for flag_tree_ter.
	* toplev.c (flag_tree_ter): Initialize to 0.
	(lang_independent_options f_): Add -ftree-ter flag.
	* tree-ssa-live.c (init_var_map): Initialize ref_count to 0.
	(delete_var_map): Free ref count if allocated.
	(register_ssa_partition): Add "is_use" parameter for reference counting.
	(create_ssa_var_map): Add flag and code for calculating ref counts.
	* tree-ssa-live.h (struct _var_map): Add ref_count field.
	(SSA_VAR_MAP_REF_COUNT): Define flag.
	(version_ref_count): Function to retreive ref_count.
	* tree-ssa.c (replace_variable): If an expression vector is passed in,
	use replacement expression instead of mapped variable when available.
	(struct value_expr_d): New structure for value lists.
	(struct temp_expr_table_d): Structure used to build an expression
	replacement table.
	(new_temp_expr_table): New. Create a new TER (Temporary Expression
	Replacement) table.
	(free_temp_expr_table): New. Free a TER table.
	(new_value_expr): New. Allocate a value list element.
	(free_value_expr): New. Free a value list element.
	(find_value_in_list): New. Find a value in a list.
	(add_value_to_list): New. Add a value to a list if not already present.
	(remove_value_from_list): New. Remove a value from a list.
	(add_dependance): New. Add a dependency to an expression.
	(check_replaceable): New. Check if a stmt is a candidate for TER. Add
	to active list and create dependancies if so.
	(finish_expr): New. Remove an expression from TER consideration.
	(mark_replaceable): New. Finish a TER expression as a valid replacement.
	(kill_expr): New. Finish dependent TER expressions as not replaceable.
	(kill_virtual_exprs): New. Finish any TER expressions dependent on a
	virtual operand as not replaceable.
	(find_replaceable_in_bb): New. Process a basic block for TER expression.
	(find_replaceable_exprs): New. Entry point for TER expression finder.
	(dump_replaceable_exprs): New. output list of replaceable expressions.
	(rewrite_out_of_ssa): Build TER table if requested, and use it.

2003-11-14  Andreas Jaeger  <aj@suse.de>

	* c-semantics.c (find_reachable_label): Use C90 function
	declaration.

2003-11-14  Jason Merrill  <jason@redhat.com>

	PR middle-end/12526
	* tree-cfg.c (call_expr_flags): Move to calls.c.
	* tree-flow.h: Move prototype to tree.h.

	PR c++/13033
	* c-simplify.c (gimplify_c_loop): Wrap the increment in a
	CLEANUP_POINT_EXPR.

	* tree-dfa.c (get_stmt_operands) <ASM_EXPR>: A memory clobber
	clobbers all call-clobbered variables.   Clobber clobber.

	* gimplify.c (canonicalize_component_ref): Remove redundant call
	to recalculate_side_effects.

2003-11-14  Richard Henderson  <rth@redhat.com>

	PR c++/12751
	* tree-eh.c (struct leh_tf_state): Add outer.
	(lower_try_finally, lower_cleanup): Set it.
	(lower_try_finally_fallthru_label): New.
	(honor_protect_cleanup_actions): Use it.
	(lower_try_finally_copy, lower_try_finally_switch): Likewise.

	* tree-eh.c (collect_finally_tree): Complete manual tailrecurse
	transformation.

2003-11-14  Richard Henderson  <rth@redhat.com>

	* gimplify.c (voidify_wrapper_expr): Don't clobber TREE_TYPE of
	statements in a STATEMENT_LIST.  Be prepared for an empty list.

2003-11-14  Steven Bosscher  <stevenb@suse.de>

	* jump.c (never_reached_warning): Remove function.
	* rtl.h (never_reached_warning): Don't declare it.
	* cfgrtl.c (never_reached_warning): Don't call it.
	* cse.c (never_reached_warning): Ditto.

2003-11-13  Jeff Law  <law@redhat.com>

	* tree-cfg.c (bsi_replace): Restore accidentally removed code.

	* tree-cfg.c (cfg_remove_useless_stmts_bb): Also detect useless
	var->var copies created by the out-of-ssa translation.

2003-11-13  Steven Bosscher  <stevenb@suse.de>

	PR middle-end/11514
	* tree-inline.c (walk_tree): Handle PLACEHOLDER_EXPR.

2003-11-13  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (cfg_remove_useless_stmts_bb): Initialize stmt.

2003-11-13  Jan Hubicka  <jh@suse.cz>

	* calls.c (special_function_p): Do not check for ECF_MALLOC.
	(flags_from_decl_or_type):  Use special_function_p.
	(expand_call): Remove call to special_function_p.
	* tree-cfg.c (notice_special_calls, clear_special_calls): New functions.
	(remove_useless_stmts): Use clear_special_calls.
	(remove_useless_stmts_1): Use notice_special_calls.
	* tree-flow.h (notice_special_calls, clear_special_calls): New functions.
	* tree-ssa-dce.c (remove_dead_stmts): Use clear_special_calls and
	notice_special_calls..

	* gimplify.c (gimplify_expr): Check labels.

	* tree-cfg.c (tree_verify_flow_info): Check labels.

	* tree-cfg.c (make_exit_edges): Do not create edges for const
	functions.
	(update_call_expr_flags): Fix.

2003-11-12  Diego Novillo  <dnovillo@redhat.com>

	(declare_inlined_vars): New local function.
	(initialize_inlined_parameters): Call it.
	(expand_call_inline): Call it.

2003-11-13  Steven Bosscher  <stevenb@suse.de>

	PR optimization/12640
	* tree-ssa-ccp.c (get_strlen): Don't follow the UD chain
	of a PHI argument if the DEF stmt for the argument is
	the PHI itself.

2003-11-12  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
	    Jeff Law  <law@redhat.com>

	* tree-cfg.c (cfg_remove_useless_stmts): New function.
	(cfg_remove_useless_stmts_bb): Likewise.
	* tree-flow.h (cfg_remove_useless_stmts): Prototype.
	* tree-ssa.c (rewrite_out_of_ssa): Use cfg_remove_useless_stmts
	instead of remove_useless_stmts.

2003-11-12  Richard Henderson  <rth@redhat.com>

	* Makefile.in (OBJS-common): Add tree-iterator.o.
	(expr.o): Depend on tree-iterator.h.
	(GTFILES): Add tree-iterator.c.
	* basic-block.h (struct basic_block_def): Replace head_tree_p
	and end_tree_p with stmt_list.
	(tree_bb_root): New.
	(create_bb): Don't declare.
	* c-common.c (c_warn_unused_result): Handle STATEMENT_LIST.
	* c-simplify.c (c_gimplify_stmt): Don't rationalize_compound_expr.
	* cfg.c (entry_exit_blocks): Adjust for member changes.
	(compact_blocks): Manage tree_bb_root.
	* expr.c (expand_expr_1): Handle STATEMENT_LIST.
	* gimple-low.c: Update for tree_stmt_iterator changes.
	(lower_cond_expr): Use expr_only.  Notice empty conditionals.
	* gimplify.c (append_to_statement_list_1): Create and
	manage statement_list nodes.
	(foreach_stmt): Remove.
	(wfl_locus): Remove.
	(annotate_all_with_locus_1): Merge into...
	(annotate_all_with_locus): ... here.  Iterate over the
	statement list directly.
	(voidify_wrapper_expr): Handle STATEMENT_LIST.
	(gimplify_return_expr): Likewise.
	(gimplify_loop_expr): Likewise.
	(shortcut_cond_r, shortcut_cond_expr): Likewise.
	(gimplify_cleanup_point_expr): Likewise.
	(gimple_build_eh_filter): Create statement list bodies.
	(gimplify_bind_expr): Likewise.
	(gimplify_switch_expr): Likewise.
	(gimplify_cond_expr): Likewise.
	(gimplify_compound_expr): Handle void expressions as well.
	(gimplify_statement_list): New.
	(gimple_push_cleanup): Gimplify the WITH_CLEANUP_EXPR operand.
	(gimplify_stmt): Ensure non-null result.
	(gimplify_to_stmt_list): New.
	(gimplify_expr): Use gimplify_compound_expr, gimplify_statement_list,
	gimplify_to_stmt_list as appropriate.
	(gimplify_body): Fix creation of outer BIND_EXPR.
	* tree-cfg.c (tree_bb_root): New.
	(build_tree_cfg): Initialize it.  Update for make_blocks changes.
	(factor_computed_gotos): Use create_bb directly.
	(make_blocks): Rewrite to use statement lists.
	(append_stmt_to_bb, prepend_stmt_to_bb): Remove.
	(create_bb): Make static.  Add stmt_list argument.  Don't allow
	null after argument.  Set tree_bb_root.
	(make_edges): ENTRY block successor is FALLTHRU.
	(remove_useless_stmts_warn_notreached): Handle STATEMENT_LIST.
	(struct rus_data): Add last_goto.
	(remove_useless_stmts_cond): Clear it.  Zap empty conditionals.
	Use expr_only for simple statment elimination.
	(remove_useless_stmts_tf): Clear last_goto.  Use TREE_SIDE_EFFECTS
	instead of IS_EMPTY_STMT.  Use append_to_statement_list instead of
	munging to COMPOUND_EXPR.
	(remove_useless_stmts_tc): Clear last_goto.  Use TREE_SIDE_EFFECTS.
	(remove_useless_stmts_goto): Set last_goto.
	(remove_useless_stmts_label): New.  Kill goto-next-label.
	(remove_useless_stmts_1): Reorg to handle STATEMENT_LIST.
	(remove_bb): Simplify block removal.
	(remove_bsi_from_block): Kill.
	(tree_block_forwards_to): Tidy bsi loops.  Do not create
	block label here.
	(tree_cfg2dot): Update for bb->stmt_list.
	(delete_tree_cfg): Clear tree_bb_root.
	(set_bb_for_stmt): Handle STATEMENT_LISTs.
	(bsi_insert_before, bsi_insert_after): Re-implement on TSIs.
	(bsi_move_after, bsi_move_before, bsi_move_to_bb_end): Likewise.
	(bsi_replace): Likewise.
	(tree_find_edge_insert_loc): New, split from ...
	(bsi_insert_on_edge_immediate): ... here.
	(bsi_commit_edge_inserts): Use it.  Add all stmts at once.
	(bsi_insert_on_edge): Use statement lists.
	(tree_split_edge): Position new block correctly.  Deal with
	fallthrough to EXIT.
	(tree_verify_flow_info): Do not check block order vs statement chain.
	(tree_make_forwarder_block): Update create_bb call, fix edge flags.
	(thread_jumps): Call tree_redirect_edge_and_branch directly.
	(tree_block_label): Don't return a NONLOCAL_LABEL.
	(tree_redirect_edge_and_branch_1): Rename from s/_1//.  Take an
	argument to use ssa_redirect_edge or redirect_edge_succ.  Use
	tree_split_edge instead of bsi_insert_on_edge_immediate.
	(tree_redirect_edge_and_branch): New.
	(remove_stmt, first_exec_stmt, bsi_init, bsi_next_in_bb): Kill.
	(bsi_start, bsi_last, bsi_prev, bsi_from_tsi): Kill.
	(bsi_update_from_tsi, bsi_link_after): Kill.
	* tree-eh.c (collect_finally_tree): Handle STATEMENT_LIST.
	(replace_goto_queue_1): Likewise.
	(replace_goto_queue): Don't use walk_tree.
	(do_return_redirection): Create statement lists.
	(do_goto_redirection): Likewise.
	(block_may_fallthru_last): Fold into...
	(block_may_fallthru): ... here.
	(frob_into_branch_around): Use append_to_statement_list.
	(honor_protect_cleanup_actions): Likewise.
	(lower_try_finally_nofallthru): Likewise.
	(lower_try_finally_onedest): Likewise.
	(lower_try_finally_copy): Likewise.
	(lower_try_finally_switch): Likewise.
	(lower_try_finally): Likewise.
	(lower_catch): Likewise.
	(lower_eh_filter): Likewise.
	(lower_eh_constructs_1): Handle STATEMENT_LIST.
	* tree-flow-inline.h (BSI_NUM_ELEMENTS, bsi_list_p): Remove.
	(new_bsi_list, empty_bsi_stack, FOR_EACH_BSI_IN_REVERSE): Remove.
	(FOR_EACH_STMT_IN_REVERSE): Remove.
	(bsi_start, bsi_last, bsi_end_p): Re-implement based on TSIs.
	(bsi_next, bsi_prev, bsi_stmt, bsi_stmt_ptr, bsi_remove): Likewise.
	* tree-flow.h (block_stmt_iterator): Likewise.
	* tree-inline.c (copy_statement_list): New.
	(copy_body_r): Use it, and append_to_statement_list.
	(initialize_inlined_parameters): Use append_to_statement_list.
	(expand_call_inline): Likewise.
	(gimple_expand_calls_inline): New.
	(expand_calls_inline): Use it.
	(walk_tree, unsave_r): Handle STATEMENT_LIST.
	(add_stmt_to_compound): Remove.
	* tree-iterator.c: New file.
	* tree-iterator.h: Re-implement based on STATEMENT_LIST.
	* tree-mudflap.c (mf_decl_cache_locals): Don't
	rationalize_compound_expr.
	* tree-optimize.c (optimize_function_tree): Make static.
	Rechain statements from blocks before deleting the cfg.
	* tree-pretty-print.c (dump_generic_node): Handle STATEMENT_LIST,
	update for change in tree_stmt_iterator wrt COMPOUND_EXPR.
	(dump_generic_node): Dump lowered COND_EXPR on a single line.
	* tree-simple.c (is_gimple_stmt): Handle STATEMENT_LIST.
	* tree-simple.h (foreach_stmt_fn, foreach_stmt): Remove.
	(gimplify_to_stmt_list): Declare.
	(alloc_stmt_list, free_stmt_list): Declare.
	* tree-ssa-dce.c (should_remove_dead_stmt): Rename from
	remove_dead_stmt; return bool if statement should be removed.
	(remove_dead_stmts): Update to match.
	* tree-ssa-live.c (build_tree_conflict_graph): Don't use
	FOR_EACH_STMT_IN_REVERSE.
	* tree-ssa-pre.c (reaching_def): Tidy BSI usage.
	(insert_one_operand, collect_expressions): Likewise.
	* tree.c (tree_size): Handle STATEMENT_LIST.
	(copy_node): Abort on STATEMENT_LIST.
	(expr_first, expr_last): Move to tree-iterator.c.
	(expr_length): Remove.
	(tree_node_structure): Handle STATEMENT_LIST.
	(tsi_link_before, tsi_link_after, tsi_delink): Move to tree-iterator.c.
	(tsi_link_chain_before, tsi_link_chain_after): Merge into non-chain.
	(tsi_new_stmt_list, tsi_stmt_list_head, body_is_empty): Kill.
	* tree.def (STATEMENT_LIST): New.
	* tree.h (STATEMENT_LIST_HEAD, STATEMENT_LIST_TAIL): New.
	(struct tree_statement_list_node): New.
	(struct tree_statement_list): New.
	(enum tree_node_structure_enum): Add TS_STATEMENT_LIST.
	(union tree_node): Add stmt_list.
	(expr_length): Remove.
	(expr_only): New.
	(add_to_compound_expr, body_is_empty): Remove.
	(optimize_function_tree): Remove.

2003-11-12  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-flow.h (remove_useless_vars): Declare.
	(expand_var_p): Declaration removed.
	* tree-ssa.c (rewrite_out_of_ssa): Call remove_useless_vars.
	* tree-cfg.c (dump_function_to_file): Update dumping of variables.
	* gimple-low.c (expand_var_p): Made static.
	(remove_useless_vars): New.
	(expand_used_vars): Expand all variables in the
	cfun->unexpanded_var_list.

2003-11-11  Richard Henderson  <rth@redhat.com>

	* c-common.c (c_gimplify_stmt): Fix botched removal of
	rationalize_compound_expr calls.

	* c-semantics.c (build_stmt): Set TREE_SIDE_EFFECTS.
	* c-simplify.c (c_gimplify_stmt): Return a gimplify_status;
	mind the status from subroutines to avoid re-gimplification.
	(c_build_bind_expr): Do not call gimplify_stmt.
	(gimplify_c_loop): Don't create a loop_expr; fully gimplify.
	(gimplify_block, gimplify_cleanup, gimplify_expr_stmt,
	gimplify_for_stmt, gimplify_while_stmt, gimplify_do_stmt,
	gimplify_if_stmt, gimplify_switch_stmt, gimplify_return_stmt,
	gimplify_decl_stmt, gimplify_compound_literal_expr,
	gimplify_stmt_expr): Return a gimplify_status.  In most cases,
	don't do local gimplification of sub-structures.
	(gimplify_decl_stmt): Use append_to_compound_expr when we care
	about the result value.
	(gimplify_stmt_expr): Use append_to_statement_list_force and
	re-gimplify so that voidify_wrapper_expr can work.
	(finish_bc_block): Don't append to a non-list.
	(c_gimplify_expr): Pass back the gimplify_status of subroutines.
	* c-common.h (c_gimplify_stmt): Update decl.
	* gimplify.c (append_to_statement_list_1): Make sure list_p is
	never null after call.
	(append_to_compound_expr): New.
	* tree-simple.h (append_to_compound_expr): Declare.

2003-11-11  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_addr_expr): Clear, not copy, TREE_SIDE_EFFECTS.

2003-11-11  Richard Henderson  <rth@redhat.com>

	PR c/13014
	* c-simplify.c (gimplify_if_stmt): Remove short circuit.
	* tree-cfg.c (struct rus_data): Add has_label.
	(remove_useless_stmts_warn_notreached): New.
	(remove_useless_stmts_cond): Warn for deleted conditionals.
	(remove_useless_stmts_tc): Warn for deleted catches.
	(remove_useless_stmts_1): Set has_label.

2003-11-11  Jan Hubicka  <jh@suse.cz>

	* gimplify.c (gimplify_call_expr):  Unset side effects for
	pure functions too.
	* tree-cfg.c (update-call_expr_flags): New function.
	(remove_useless_stmts_and_vars_1): Use it.
	(is_ctrl_altering_stmt):  Pure/const calls never alter the CFG.
	* tree-ssa-dce.c (stmt_useful_p): Check side effects flag
	on call exprs.

2003-11-11  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (has_label_p): New function.
	(tree_verify_flow_info): New checks.
	* tree-optimize.c (optimize_function_tree): Call verify_flow_info
	before de-SSA.

2003-11-11  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (struct rus_data): Rename from rusv_data.
	Remove remove_unused_vars.
	(remove_useless_stmts*): Rename from remove_useless_stmts_and_vars*.
	(remove_useless_stmts_bind): Do not remove dead variables.
	(remove_useless_stmts): Kill remove_unused_vars argument.
	* tree-flow.h (remove_useless_stmts): Update.
	* tree-optimize.c (tree_rest_of_compilation): Update call.
	* tree-ssa.c (rewrite_out_of_ssa): Likewise.

2003-11-11  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
	    Diego Novillo  <dnovillo@redhat.com>

	* basic-block.h (brief_dump_cfg): Declare.
	* cfg.c (dump_cfg_bb_info, brief_dump_cfg): New.
	* diagnostic.h (dump_generic_node): Declaration changed.
	(print_generic_stmt_indented): Declare.
	* gimple-low.c (expand_var_p): New.
	(expand_used_vars): Use it.
	* tree-cfg.c (struct cfg_stats_d): Remove num_failed_bind_expr_merges
	field.
	(remove_bb): Only dump whole block with TDF_DETAILS.
	(tree_dump_bb): Use dump_generic_bb.
	(dump_tree_cfg): Use brief_dump_cfg and dump_function_to_file.
	(dump_cfg_function_to_file): Merged into dump_function_to_file,
	removed.
	(dump_cfg_stats): Do not dump cfg_stats.num_failed_bind_expr_merges.
	(dump_function_to_file): Moved from tree-dump.c, merged with
	dump_cfg_function_to_file.
	* tree-dump.c (dump_function_to_file): Removed.
	* tree-flow.h (dump_cfg_function_to_file): Declaration removed.
	(dump_generic_bb, expand_var_p): Declare.
	* tree-must-alias.c (tree_compute_must_alias): Replace
	dump_cfg_function_to_file by dump_function_to_file.
	* tree-ssa-ccp.c (tree_ssa_ccp): Ditto.
	* tree-ssa-copyprop.c (tree_ssa_copyprop): Ditto.
	* tree-ssa-dce.c (tree_ssa_dce): Ditto.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Ditto.
	* tree-ssa-pre.c (tree_perform_ssapre): Ditto.
	* tree-ssa.c (rewrite_into_ssa, rewrite_out_of_ssa): Ditto.
	* tree-tailcall.c (tree_optimize_tail_calls): Ditto.
	* tree-pretty-print.c (print_declaration, print_generic_decl): Don't
	use flags argument, change spacing.
	(dump_block_info): Removed.
	(dump_generic_bb_buff, dump_generic_bb, print_generic_stmt_indented,
	dump_bb_header, dump_bb_end, dump_phi_nodes): New functions.
	(dump_vops): Change spacing, don't dump phi nodes.
	(do_niy, print_generic_stmt, print_generic_expr, print_declaration,
	print_struct_decl, print_call_name): Add argument to
	the dump_generic_node calls.
	(last_bb): Removed.
	(dump_generic_node): Print semicolons at end of statements correctly.
	Don't print bb related stuff.
	(maybe_init_pretty_print): Don't initialize last_bb.
	* tree-ssa.c (rewrite_out_of_ssa): Do not allow virtual operands to
	be shown in the .optimized dump.

2003-11-11  Daniel Berlin  <dberlin@dberlin.org>

	PR optimization/12936
	* tree-ssa-pre.c (expr_phi_insertion): Remove unused code that was
	causing ICE's for VA_ARG_EXPR.

2003-11-10  Richard Henderson  <rth@redhat.com>

	* gimple-low.c (lower_function_body): Lower bind_expr in place.
	(lower_stmt): Only incr for stmts we're skipping.
	(lower_cond_expr): Detect empty if.

2003-11-10  Steven Bosscher  <stevenb@suse.de>

	* toplev.c (rest_of_decl_compilation): Use the location of the
	declaration for error messages.

2003-11-10  Richard Henderson  <rth@redhat.com>

	* gimplify.c (add_stmt_to_compound, add_tree): Remove.
	(append_to_statement_list_1, append_to_statement_list): New.
	(append_to_statement_list_force): New.
	(gimplify_loop_expr): Take pre_p.
	(gimplify_expr): Provide it.
	* tree-simple.h: Update.

	* c-simplify.c: Replace add_tree with append_to_statement_list.
	* gimplify.c, tree-mudflap.c: Likewise.

2003-11-10  Richard Henderson  <rth@redhat.com>

	* c-common.c (c_warn_unused_result): Restructure to use iterator
	on COMPOUND_EXPR only.

2003-11-09  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (tree_verify_flow_info): Fix checking of order of basic
	blocks over code.

2003-11-09  Richard Henderson  <rth@redhat.com>

	* basic-block.h (struct edge_def): Turn insns into a union.
	* cfgrtl.c (insert_insn_on_edge): Update to match.
	(commit_one_edge_insertion, commit_edge_insertions): Likewise.
	(commit_edge_insertions_watch_calls): Likewise.
	* gcse.c (reg_killed_on_edge, bypass_block): Likewise.
	* profile.c (instrument_edges): Likewise.
	* rtlanal.c (hoist_insn_to_edge): Likewise.
	* tree-cfg.c (PENDING_STMT): Likewise.
	(SET_PENDING_STMT): Remove.
	(bsi_commit_edge_inserts): Update to match.

2003-11-08  Jan Hubicka  <jh@suse.cz>

	* fold.c (nondestructive_fold_binary_to_constant): Fix typo.
	* fold-const.c (fold_relational_const): Check for side effects.

2003-11-07  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* basic-block.h (create_bb): Declaration changed.
	* tree-cfg.c (create_bb): Enable creating a block on specified place.
	(make_blocks, tree_split_edge, tree_make_forwarder_block): Use it.
	(tree_verify_flow_info): Check bbs are in the correct order.

	* tree-cfg.c (find_unreachable_blocks): Remove now incorrect comments.

	* tree-ssa.c (rewrite_out_of_ssa): Don't remove annotations from
	statements before the final dump.

2003-11-07  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-tailcall.c (struct tailcall): New.
	(bb_optimize_tail_calls, find_tail_call_p): Removed.
	(eliminate_tail_call): Get the tailcall from the struct tailcall.
	(optimize_tail_call, find_tail_calls): New.
	(tree_optimize_tail_calls): Use them.

2003-11-07  Jan Hubicka  <jh@suse.cz>

	* gimple-low.c (simple_goto_p): Move to...
	* tree-cfg.c: (simple_goto_p): ... here;
	(nonlocal_goto_p): New.
	(is_computed_goto): Rename to ...
	(computed_goto_p): ... this; make global.
	(factor_computed_gotos, make_blocks):  Update calls.
	(make_ctrl_stmt_edges): Add edge for nonlocal labels; use new functions.
	* tree-flow.h (is_coputed_goto): Kill.
	(nonlocal_goto_p, simple_goto_p, computed_goto_p): Declare.
	* tree-ssa-ccp (visit_stmt): Update.

2003-11-07  Jan Hubicka  <jh@suse.cz>

	* fold-const.c (tree_expr_nonzero_p): Fix typo.

	* fold-const.c (tree_expr_nonzero_p): New function.
	(fold_relational_const): Use it.
	(nondestructive_fold_binary_to_constant): Allow casts in address
	expressions.

2003-11-06  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (tree_block_label):  Cleanup.

2003-11-06  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (fast_a_dominates_b): New function.
	(build_dfs_id_array_1): Ditto.
	(build_dfs_id_array): Ditto.
	(load_modified_phi_result): Use fast_a_dominates_b.
	(rename_1): Ditto.
	Also use build_dfs_id_array, and remove some duplicate ephi_at_block
	calls.
	(insert_occ_in_preorder_dt_order): Remove some duplicate ephi_at_block
	calls.
	(pre_expression): Ditto.
	Also free dfs_id arrays here.
	(collect_expressions): Remove duplicate bsi_stmt calls.

2003-11-06  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (count_stmts_in_bb): Removed.
	(set_var_phis): Only call bb_for_stmt once.
	(insert_one_operand): Remove endtree, endtreep, a lot of special handling
	no longer needed.  Remove insert_done.
	(collect_expressions): Enable INDIRECT_REF and SSA_NAME handling.

2003-11-06  Steven Bosscher  <stevenb@suse.de>

	* tree-cfg.c (STRIP_CONTAINERS): Remove.

2003-11-06  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (cleanup_cond_expr_graph):  Clean edge flags.

2003-11-06  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-dump.c (dump_options): Remove TDF_LINENO from all setting.

2003-11-06  Jan Hubicka  <jh@suse.cz>

	* builtins.c (expand_builtin_strstr, expand_builtin_strchr,
	expand_builtin_strrchr, expand_builtin_strpbrk,
	simplify_builtin_strstr, simplify_builtin_strrchr,
	simplify_builtin_strpbrk): Add missing casts.

2003-11-05  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* diagnostic.h (print_generic_decl): Declare.
	* tree-cfg.c (dump_cfg_function_to_file): Dump variables in
	unexpanded_var_list.
	* tree-pretty-print.c (print_generic_decl): New function.

2003-11-05  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* Makefile.in (gimplify.o): Add function.h dependency.
	* c-call-graph.c (construct_call_graph): Modify build_tree_cfg call.
	* gimple-low.c (record_vars): Export.
	(lower_function_body): Remove the topmost BIND_EXPR.
	* gimplify.c: Include function.h.
	(gimple_add_tmp_var): Record temporaries in the
	cfun->unexpanded_vars_list if available.
	* tree-cfg.c (build_tree_cfg): Work without the topmost BIND_EXPR.
	(dump_cfg_function_to_file): New.
	(dump_tree_cfg): Use dump_cfg_function_to_file.
	* tree-dump.c (dump_function_to_file): Work without the topmost
	BIND_EXPR.
	* tree-flow.h (build_tree_cfg): Declaration changed.
	(dump_cfg_function_to_file, record_vars): Declare.
	* tree-optimize.c (optimize_function_tree, tree_rest_of_compilation):
	Work without the topmost BIND_EXPR.
	* tree-must-alias.c (tree_compute_must_alias): Use
	dump_cfg_function_to_file.
	* tree-ssa-ccp.c (tree_ssa_ccp): Ditto.
	* tree-ssa-copyprop.c (tree_ssa_copyprop): Ditto.
	* tree-ssa-dce.c (tree_ssa_dce): Ditto.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Ditto.
	* tree-ssa-pre.c (tree_perform_ssapre): Ditto.
	* tree-ssa.c (rewrite_into_ssa, rewrite_out_of_ssa): Ditto.
	* tree-tailcall.c (tree_optimize_tail_calls): Ditto.
	* tree.h (optimize_function_tree): Declaration changed.

2003-11-03  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (handle_bb_creation): Removed.
	(redo_dominators): Removed.
	(insert_one_operand): Remove code to handle bb creation, since all
	critical edges are now pre-split.
	(finalize_2): Remove redo_dominators related code.
	(pre_expression): Return 1 if we exited early because nothing happened.
	(split_critical_edges): Do fake variable assignments instead, because
	it works. return true if we actually split an edge.
	(tree_perform_ssapre): Remove redo_dominators code.

2003-11-03  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* function.h (struct function): New field unexpanded_var_list.
	* gimple-low.c (unexpanded_var_list): Removed.
	(record_vars, expand_used_vars): Use cfun->unexpanded_var_list.
	* tree-flow.h (unexpanded_var_list): Declaration removed.

	* gimplify.c (should_carry_locus_p): New.
	(annotate_all_with_locus_1): Use it.  Do not annotate empty
	statements.

2003-11-03  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (tree_try_redirect_by_replacing_jump): Do not use
	succesor_block.

2003-11-03  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-pretty-print.c (dump_block_info): Add flags parameter.
	Only show line number when asked to.
	(dump_generic_node): Pass flags to dump_block_info.

2003-11-03  Jan Hubicka  <jh@suse.cz>

	* cfghooks.h (redirect_edge_and_branch hook): Make it return edge.
	* cfgrtl.c (cfg_layout_redirect_edge_and_branch,
	rtl_redirect_edge_and_branch, try_redirect_by_replacing_jump):
	Update to new interface.
	* tree-cfg.c (tree_cfg_hooks): Move to end of file; set
	redirect_edge_and_branch and redirect_edge_and_branch_force.
	(thread_jumps): Use redirect_edge_and_branch.
	(tree_block_label): new; break out of thread_edge.
	(tree_try_redirect_by_replacing_jump): New.
	(thread_edge): Rename to tree_redirect_edge_and_branch; deal sanely
	with unusual edges; preserve profile.
	(tree_redirect_edge_and_branch_force): New.
	* tree-flow.h (ssa_redirect_edge): Declare.
	* tree-ssa.dom.c (tree_ssa_dominator_optimize): Use redirect_edge_and_branch.
	* tree-ssa.c (ssa_redirect_edge): New.

2003-11-03  Jeff Law  <law@redhat.com>

	* domwalk.h (struct dom_walk_data): New field "global_data".
	* tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Initialize new
	"global_data" field.
	* tree-flow.h (enum need_phi_state): New enumeration.
	(var_ann_d): Add bitfield for need_phi_state.
	* tree-ssa.c (mark_def_sites_global_data): New structure to hold
	global data for mark_def_sites dominator walk.
	(mark_def_sites): Revamp to be called via the dominator walker.
	(set_def_block): Update need_phi_state for the variable as needed.
	(set_livein_block): Similarly.
	(rewrite_into_ssa): Use dominator walker to call mark_def_sites.
	Delay freeing dominance info.  Kill "globals" bitmap.
	(insert_phi_nodes): No longer need "globals" bitmap.  Use
	need_phi_state in variable's annotation to determine if a PHI
	may be needed.

	* tree-ssa-dom.c (dom_opt_finalize_block): Try to thread across the
	edges leaving COND_EXPR nodes which are leafs in the dominator
	tree.
	(record_equivalences_from_incoming_edge): Do not set EQ_EXPR_VALUE
	unless the block's single predecessor contains parent_block_last_stmt.

2003-11-03  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-dump.c (dump_options): Add TDF_LINENO.
	* tree-pretty-print.c (dump_generic_node): Print line number for
	statements if asked to.
	* tree.h (TDF_LINENO): New.
	* doc/invoke.texi (lineno): Document.

2003-11-03  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* expr.c (expand_vars, expand_var): Split of ...
	(expand_expr_1): ... here.
	* expr.h (expand_var): Declare.
	* gimple-low.c (lower_function_body, lower_stmt, lower_bind_expr):
	Eliminate BIND_EXPRs.
	(expand_used_vars): New.
	* tree-alias-common.c (create_alias_vars): Walk variables in blocks.
	* tree-cfg.c (make_bind_expr_blocks): Removed.
	(make_blocks, build_tree_cfg, factor_computed_gotos): Don't handle
	BIND_EXPRs.
	(assign_vars_to_scope, successor_block, NEXT_BLOCK_LINK): Removed.
	(make_edges, make_exit_edges): Don't use successor_block.
	(remove_useless_stmts_and_vars_goto): Don't expect NEXT_BLOCK_LINK
	to be set.
	(bsi_init, bsi_next_in_bb, bsi_from_tsi): Don't handle BIND_EXPRs.
	(replace_stmt): Don't create BIND_EXPRs.
	* tree-flow.h (struct var_ann_d): Removed field scope.
	(struct stmt_ann_d): Removed fields scope and scope_level.
	(propagate_copy): Declaration changed.
	(fixup_var_scope): Removed.
	* tree-must-alias.c (tree_compute_must_alias): Consider DECL_NONLOCAL
	vars call clobbered.
	* tree-optimize.c (tree_rest_of_compilation): Call expand_used_vars.
	* tree-ssa-copyprop.c (move_var_to_scope, fixup_var_scope): Removed.
	(copyprop_stmt): Call to propagate_copy changed.
	(propagate_copy): Don't update scope.
	* tree-ssa-dom.c (cprop_into_stmt): Call to propagate_copy changed.
	(eliminate_redundant_computations): Don't call fixup_var_scope.
	* tree-ssa.c (insert_copy_on_edge): Don't update scope.

2003-11-02  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-inline.c (walk_tree): Tail recursion optimized for
	COMPOUND_EXPRs.
	* tree-eh.c (collect_finally_tree): Ditto.

2003-11-02  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-optimize.c (optimize_function_tree): Removed duplicate call of
	lower_function_body.  Moved call of reset_block_changes ...
	(tree_rest_of_compilation) ... here.  Reset the scope to top before
	expanding function end.

2003-11-01  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* basic-block.h (BB_CONTROL_STRUCTURE): Removed.
	* tree-cfg.c (struct cfg_stats_d): Field num_merged_cases removed.
	(make_blocks, make_bind_expr_blocks, append_stmt_to_bb, bsi_link_after,
	build_tree_cfg, factor_computed_gotos, prepend_stmt_to_bb,
	remove_stmt, replace_stmt): Don't set parent.
	(set_parent_stmt, add_stmt_to_bb, find_contained_blocks,
	blocks_unreachable_p, remove_blocks, remove_unreachable_block,
	move_outgoing_edges, merge_tree_blocks, remap_stmts): Removed.
	(REMOVE_ALL_STMTS, REMOVE_NO_STMTS, REMOVE_NON_CONTROL_STRUCTS,
	REMOVE_CONTROL_STRUCTS): Removed.
	(remove_bb): Code to handle control structures removed.
	(tree_block_forwards_to): Don't stop due to CASE_LABEL_EXPRs.
	(tree_dump_bb): Don't print parent.  Print only BIND_EXPRs in slim
	form.
	(dump_tree_cfg): Don't count merged case labels.
	(is_ctrl_structure): Removed.
	(stmt_starts_bb_p): Don't handle CASE_LABEL_EXPRs.
	(tree_verify_flow_info): Don't check BB_CONTROL_STRUCTURE.
	* tree-flow-inline.h (parent_block, parent_stmt): Removed.
	* tree-flow.h (struct stmt_ann_d): Remove parent_stmt field.
	(parent_stmt, parent_block, is_ctrl_structure): Declarations removed.
	* tree-pretty-print.c (dump_generic_node): Don't handle lowered
	COND_EXPRs specially.
	* tree-ssa-ccp.c (visit_stmt): Don't check is_ctrl_structure.

2003-10-31  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (record_equivalences_from_stmt): Restore lost code
	to create equivalences from BIT_IOR_EXPR.

	* tree-ssa-dom.c (thread_jumps_walk_stmts): Go ahead and optimize
	a COND_EXPR with a compile-time constant condition.

2003-10-31  Diego Novillo  <dnovillo@redhat.com>

	* tree-optimize.c (optimize_function_tree): Fix comment
	describing SSA pass after DOM2.

2003-10-31  Diego Novillo  <dnovillo@redhat.com>

	Fix PR optimization/12825
	* tree-optimize.c (optimize_function_tree): Run SSA renamer after
	second DOM pass.

2003-10-30  Richard Henderson  <rth@redhat.com>

	* c-common.c (match_case_to_enum_1, match_case_to_enum): New.
	(c_do_switch_warnings): New.
	* c-common.h (c_do_switch_warnings): Declare.
	* c-typeck.c (c_finish_case): Call it.
	* stmt.c (all_cases_count, BITARRAY_TEST, BITARRAY_SET,
	mark_seen_cases, check_for_full_enumeration_handling): Remove.
	(expand_end_case_type): Don't do warn_switch handling.
	* expr.h, tree.h: Remove dead decls.

	* c-simplify.c (gimplify_switch_stmt): Force switch body non-null.

2003-10-30  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (thread_jumps): Allow SWITCH_EXPR.
	(thread_edge): Handle it.  Tidy surrounding code.

2003-10-30  Richard Henderson  <rth@redhat.com>

	* domwalk.c (walk_dominator_tree): Pass any final is_ctrl_stmt
	down the recursive walk.

2003-10-30  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (thread_across_edge): Renamed from
	thread_through_successor.  Revamp to thread the destination of an edge
	rather than the successors of a block.
	(dom_opt_finalize_block): Corresponding changes.  Do not bother calling
	thread_across_edge unless we are at a leaf in the dominator tree.

	* tree-cfg.c (thread_jumps): Now returns a bool.  Move some tests into
	tree_forwarder_block_p.  Improve comments.
	(cleanup_control_flow): Now returns a bool indicating if anything was
	changed.
	(thread_unconditional_jumps): Kill.
	(cleanup_tree_cfg): Repeat cascading cleanups until nothing changes.
	(tree_forwarder_block_p): Check forwardable bit in the block's
	annotation to avoid useless work.  Mark blocks as not forwardable as
	appropriate.  Verify destination is not the exit block here.  Do not
	consider successors of the entry block as forwarders.  Ignore empty
	statements when walking through the block's statements.  Verify target
	block is not the start of a case label and that we can safely insert
	a label at the target block.

2003-10-29  Richard Henderson  <rth@redhat.com>

	* c-common.c (c_warn_unused_result): Remove lowered containers.
	* c-semantics.c (genrtl_case_label): Update add_case_node call.
	* c-simplify.c (gimplify_switch_stmt): Build SWITCH_EXPR and
	gimplify it simultaneously with the body.
	* expr.c (expand_expr_1): Handle SWITCH_BODY clear and
	SWITCH_LABELS set.  Update add_case_node calls.
	* gimple-low.c (lower_stmt): Don't do anything for SWITCH_EXPR.
	(lower_switch_expr, lower_case_label_expr): Remove.
	* gimplify.c (gimplify_switch_expr): Zap SWITCH_BODY after
	gimplification.  Force default entry for SWITCH_LABELS.
	(gimplify_case_label_expr): Rename from gimple_add_case_label.
	Assert switch in scope; lower to LABEL_EXPR.
	* stmt.c (pushcase, pushcase_range) Update add_case_node calls.
	(add_case_node): Add dont_expand_label argument.
	(same_case_target_p): Don't search rtl.
	* tree-cfg.c (enum find_location_action): Remove.
	(make_switch_expr_blocks): Remove.
	(make_blocks): Update.
	(make_case_label_edges): Remove.
	(make_edges): Update.
	(find_contained_blocks): Remove lowered containers.
	(make_switch_expr_edges): New.
	(make_ctrl_stmt_edges): Call it.
	(make_cond_expr_edges): Use label_to_block.
	(remove_useless_stmts_and_vars_1): Don't go into SWITCH_BODY.
	(remove_unreachable_block): Remove SWITCH_EXPR special case.
	(cleanup_cond_expr_graph): Tidy.
	(cleanup_switch_expr_graph): Rewrite.
	(disconnect_unreachable_case_labels): Remove.
	(find_taken_edge_cond_expr): Use integer_zerop/integer_nonzerop.
	(find_taken_edge_switch_expr): Rewrite.
	(value_matches_some_label): Remove.
	(find_case_label_for_value): New.
	(is_ctrl_structure): Remove lowered containers.
	(is_ctrl_stmt): Add SWITCH_EXPR.
	(switch_parent): Remove.
	(handle_switch_fallthru): Remove.
	(handle_switch_split): Remove.
	(find_insert_location): Merge into ...
	(bsi_insert_on_edge_immediate): ... here.  Simplify.
	(tree_split_edge): Don't set EDGE_FALLTHRU.
	* tree-eh.c (collect_finally_tree): Remove lowered containers.
	(replace_goto_queue_1, block_may_fallthru_last): Likewise.
	(lower_eh_constructs_1): Likewise.
	(verify_norecord_switch_expr): New.
	(lower_try_finally_switch): Generate lowered switches.
	* tree-inline.c (expand_calls_inline): Don't search null SWITCH_BODY.
	* tree-pretty-print.c (dump_generic_node): Do something sensible
	with lowered switch_expr.
	* tree-ssa-dom.c (record_equivalences_from_incoming_edge): Update
	for lowered switch_expr.
	* tree.def (SWITCH_EXPR): Update docs.
	* tree.h (add_case_node): Update decl.

2003-10-29  Daniel Berlin <dberlin@dberlin.org>

	* tree-ssa-pre.c (n_phi_preds): New variable.
	(generate_vops_as_of_bb): New function
	(generate_expr_as_of_bb): Remove unused first argument. Update all
	callers.
	(subst_phis): Add boundary check for the phi_pred_cache array.
	(same_e_version_phi_result): Once modified, no point in continuing
	the loop.
	(finalize_2): ESSA Minimization can crash if we ended up with new
	BB's

2003-10-29  Richard Henderson  <rth@redhat.com>

	* tree-eh.c (do_return_redirection): Don't move copy to RESULT_DECL
	outside the RETURN_EXPR.  Introduce a new temporary as needed.

2003-10-26  Richard Henderson  <rth@redhat.com>

	* gimplify.c (keep_function_tree_in_gimple_form): Remove.
	(gimplify_function_tree): Return void.  Remove hack for
	language not supporting gimple.
	* tree.h: Update decls.
	* langhooks-def.h (LANG_HOOKS_GIMPLE_BEFORE_INLINING): New.
	* langhooks.h (struct lang_hooks): Add gimple_before_inlining.
	* tree-inline.c (copy_body_r): Check that instead of
	keep_function_tree_in_gimple_form.
	(initialize_inlined_parameters): Likewise.
	(expand_call_inline, expand_calls_inline): Likewise.

	* explow.c (probe_stack_range): Never emit loop notes.
	* expr.c (emit_block_move_via_loop): Likewise.
	* toplev.c (rest_of_compilation): Always synthesize loop notes.

2003-10-26  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* Makefile.in (gimple-low.o): Add function.h dependency.
	* gimple-low.c (struct lower_data): New field block.
	(lower_function_body, lower_stmt, lower_bind_expr): Record
	the block at statements.
	* cfglayout.c (insn_locators_initialize): Use new info about
	blocks.
	* expr.c (expand_expr): Record block changes.
	* function.c (blocks_nreverse): Export.
	(uninitialized_vars_warning): Use DECL_RTL_SET_P to test for presence
	of rtl.
	(reset_block_changes, record_block_change, finalize_block_changes,
	check_block_change, free_block_changes): New functions.
	* function.h (struct function): New bitfield dont_emit_block_notes.
	New field ib_boundaries_block.
	(blocks_nreverse, reset_block_changes, record_block_change,
	finalize_block_changes, check_block_change, free_block_changes):
	Declare.
	* sibcall.c (optimize_sibling_and_tail_recursive_call): Don't call
	reorder_blocks when dont_emit_block_notes.
	* stmt.c (expand_start_bindings_and_block, expand_end_bindings):
	Don't emit block notes when dont_emit_block_notes.
	* toplev.c (rest_of_compilation): Don't call reorder_blocks when
	dont_emit_block_notes.
	* tree.c (build1): Initialize TREE_BLOCK field.
	* tree-flow.h (lower_function_body): Declare.
	* tree-optimize.c: Include function.h.
	(optimize_function_tree): Call lower_function_body.
	* tree.h (struct tree_exp): Add block field.
	(TREE_BLOCK): New macro.

2003-10-26  Richard Henderson  <rth@redhat.com>

	* tree.h (tree_dump_index): Add TDI_lower.
	* tree-dump.c (dump_files): Add .lower entry.
	* tree-optimize.c (optimize_function_tree): Move lower_function_body,
	(tree_rest_of_compilation): here.  Tidy .useless dump.

2003-10-25  Jan Hubicka  <jh@suse.cz>

	* c-common.c (c_estimate_num_insns_1): Kill.
	(c_estimate_num_insns): Kill.
	* c-common.h (c_estimate_num_insns): Kill.
	* c-lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
	* cp-lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
	* objc-lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
	* java/lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
	(java_estimate_num_insns_1, java_estimate_num_insns): Kill.
	* cgraphunit (cgraph_analyze_function): Use estimate_num_insns.
	* tree-eh.c (decide_copy_try_finally): Likewise.
	* tree-inline.c (limits_allow_inilining, optimize_inline_calls): Likewise.
	(estimate_num_insns_1, estimate_num_insns): New functions.
	* langhooks-def.h (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
	* langhooks.h (estimate_num_inssn): Kill.
	* tree-inline.h (estimate_num_insns): Declare.

2003-10-25  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* gimple-low.c: New.
	* Makefile.in (gimple-low.o): Add.
	* domwalk.c (walk_dominator_tree): Consider COND_EXPR a control
	structure.
	* tree-cfg.c (make_cond_expr_blocks, linearize_control_structures,
	linearize_cond_expr): Removed.
	(thread_jumps, tree_forwarder_block_p): New.
	(merge_tree_blocks): Unused now.
	(phi_alternatives_equal): Modified for use in jump threading.
	(enum find_location_action): Remove EDGE_INSERT_LOCATION_NEW_ELSE.
	(make_blocks): Don't call make_cond_expr_blocks.
	(set_parent_stmt): Ensure we don't set COND_EXPR as a parent
	statement.
	(find_contained_blocks): Remove COND_EXPR alternative.
	(make_cond_expr_edges): Handle lowered gotos.
	(cleanup_tree_cfg): Don't call linearize_control_structures,
	call thread_jumps and verify_flow_info and rerun cleanup_control_flow.
	(remove_unreachable_block): Remove handling of structured COND_EXPRs.
	(remove_bb): Fix warning for removed goto exprs.
	(cleanup_control_flow, cleanup_cond_expr_graph,
	cleanup_switch_expr_graph, find_taken_edge_cond_expr,
	bsi_insert_before, find_insert_location, bsi_insert_on_edge_immediate):
	Handle lowered COND_EXPRs.
	(is_ctrl_structure): Remove COND_EXPR.
	(is_ctrl_stmt): Add COND_EXPR.
	(tree_verify_flow_info): Check validity of COND_EXPRs.
	(thread_edge): Moved from tree-ssa-dom.c.
	* tree-flow.h (cleanup_cond_expr_graph, cleanup_switch_expr_graph):
	Declaration changed.
	(thread_edge, lower_function_body): Declare.
	* tree-optimize.c (optimize_function_tree): Call lower_function_body.
	* tree-pretty-print.c (dump_generic_node): Dump lowered cond_exprs in
	full.
	* tree-ssa-copyprop.c (fixup_var_scope): Handle non-SSA_NAMEs.
	* tree-ssa-dce.c (stmt_useful_p, process_worklist): Cleaned up when
	COND_EXPRs are lowered.
	* tree-ssa-dom.c (thread_edge): Moved to tree-cfg.c.
	(tree_ssa_dominator_optimize_1): Dumps and setting of vars_to_rename
	moved from thread_edge.
	(optimize_stmt): Pass block iterator to cleanup_cond_expr_graph and
	cleanup_switch_expr_graph.
	* tree-ssa.c (insert_copy_on_edge): Fixup scope for emitted variables.

	* dominance.c (BB_NODE): Use VARRAY_GENERIC_PTR_NOGC.
	(calculate_dominance_info): Use VARRAY_GENERIC_PTR_NOGC_INIT.
	* varray.c (element): Add GENERIC_PTR_NOGC entry.
	* varray.h (enum varray_data_enum): Add VARRAY_DATA_GENERIC_NOGC.
	(union varray_data_tag): Add generic_nogc.
	(VARRAY_GENERIC_PTR_NOGC_INIT,  VARRAY_GENERIC_PTR_NOGC,
	VARRAY_PUSH_GENERIC_PTR_NOGC, VARRAY_TOP_GENERIC_PTR_NOGC): New.

2003-10-25  Jan Hubicka  <jh@suse.cz>

	* cppcharset.c (one_utf8_to_utf32): Initialize 's' to silence warning.

2003-10-25  Jan Hubicka  <jh@suse.cz>

	* fold-const.c (nondestructive_fold_binary_to_constant): Realize that
	(plus (address) (const_int)) is a constant.

2003-10-25  Jan Hubicka  <jh@suse.cz>

	* opts.c (decode_options): Uncomment unit-at-a-time setting
	* params.def: Syncrhonize with manline.
	* tree-inline.c (initialize_inlined_parameters):  Set variable as
	gimplified.

2003-10-24  Steven Bosscher  <steven@gcc.gnu.org>

	* gimplify.c (create_artificial_label): New function.
	(build_and_jump): Use it.
	* c-simplify.c (c_gimplify_stmt): Likewise.
	(gimplify_condition): Likewise.
	* tree-cfg.c (factor_computed_gotos, tree_block_forwards_to,
	handle_switch_fallthru, handle_switch_split): Likewise.
	* tree-ssa-dom.c (thread_edge): Likewise.
	* tree-ssa-pre.c (split_critical_edges): Likewise.
	* tree-tailcall.c (eliminate_tail_call): Likewise.
	* tree-eh.c (frob_into_branch_around,
	honor_protect_cleanup_actions, lower_try_finally_nofallthru,
	lower_try_finally_onedest, lower_try_finally_copy,
	lower_try_finally_switch, lower_catch, lower_eh_filter,
	lower_cleanup): Likewise.
	(make_label): Remove.
	* tree-simple.h (create_artificial_label): Add prototype.
	* tree-inline.c (expand_call_inline): Make return label for
	inlined function artificial.

2003-10-23  Jeff Law  <law@redhat.com>

	* timevar.def (TV_TREE_SSA_THREAD_JUMPS): New timevar.
	* tree-dump.c (dump_files): Add dump file for jump threading.
	* tree.h (TDI_thread_jumps): New enum member.
	* tree-cfg.c (tree_block_forwards_to): No longer static.
	* tree-flow.h (tree_block_forwards_to): Prototype.
	(tree_ssa_dominator_thread_jumps): Likewise.
	* tree-optimize.c (optimize_function_tree): Call jump threader.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize_1): New function.
	Common code for redundancy elimination and jump threading on
	the dominator tree.  Slightly different callback initialization
	for redundancy elimination and jump threading.  Initialize
	block forwardable attribute.
	(tree_ssa_dominator_optimize): Call tree_ssa_dominator_optimize_1.
	(tree_ssa_dominator_thread_jumps): New function.
	(thread_edge): Mark results of PHI nodes as needing rewriting if
	we have threaded through a block with PHI nodes.
	(thread_through_successor): If thread_through_phis is nonzero,
	then allow jump threading through blocks with PHI nodes.  If the
	target block is a forwarder block, then forward the jump.
	(thread_jumps_walk_stmts): Statement walker for dominator thread
	jumping.

	* tree-ssa-dom.c (record_equivalence_from_incoming_edge): Fix
	comment typo.

2003-10-23  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_*): Return gimplify_status.
	(gimple_add_tmp_var): Set seen_in_bind_expr.
	(gimplify_bind_expr): Likewise.  Kill if 0 code.
	(gimplify_return_expr): Cope with error marks.
	(gimple_push_cleanup): Do nothing if errors seen.
	(gimplify_expr): Cope with error marks.  Use gimplify_status to
	decide when to exit the main loop.  Zap statements with errors.
	(gimplify_body): Return void.
	(keep_function_tree_in_gimple_form): Don't exit on errors.
	(gimplify_function_tree): Return bool.  Don't exit on errors.
	* langhooks.c (lhd_gimplify_expr): Return GS_UNHANDLED.
	* langhooks.h (struct lang_hooks): Update docs for gimplify_expr.
	* tree-optimize.c (optimize_function_tree): Don't exit on errors.
	Move delete_tree_cfg call outside optimization clause.
	(tree_rest_of_compilation): Don't exit on errors.
	* tree-simple.h (enum gimplify_status): New.
	(gimplify_expr, gimplify_stmt, gimplify_body): Update.
	* tree-ssa.c (rewrite_out_of_ssa): Move delete_tree_cfg call to
	optimize_function_tree.
	* tree.h (struct tree_decl): Add seen_in_bind_expr.
	(gimplify_function_tree): Update.
	* c-common.c (c_add_case_label): Unify three error exit paths.
	Create a normal label, not a case label to suppress unreachable
	code warning.
	* c-simplify.c (c_build_bind_expr): Don't create an empty bind
	body.  Pass entire bind_expr to gimplify_stmt.
	(gimplify_block): Don't abort on mismatches if errors seen.
	(gimplify_expr_stmt): Cope with error marks.
	(gimplify_decl_stmt): Likewise.
	(c_gimplify_expr): Return gimplify_status.

2003-10-22  Daniel Berlin  <dberlin@dberlin.org>

	* tree-pretty-print.c (dump_generic_node): Kill off ELEFT_NODE.
	Print out status of new EUSE_LVAL flag.

	* tree-ssa-pre.c: #include alloc-pool.h
	(append_eref_to_block): Inline.
	(names_match_p): Ditto.
	(pre_expression): Take sbitmap of variables to rename so we can
	mark our new variable if necessary.
	(insert_occ_in_preorder): Completely redo to be an O(n log n)
	algorithm worst case, instead O(n^2) all the time.
	(build_dfn_array): New function.
	(eref_compare): Ditto.
	(preorder_count): Remove no-longer used variable.
	(pre_stats): Add new stats about memory use.
	(struct expr_info): add loadpre_cand member.
	(euse_node_pool): New alloc-pool
	(eref_node_pool): Ditto
	(create_expr_ref): Use them.
	(expr_phi_insertion): Insert on PHI's of VUSES for loadpre cands.
	Not all expressions have uses (left occurrences don't).
	(load_modified_real_occ_real_occ): Return false, not abort.
	(process_delayed_rename): Remove useless fibheap, do proper LVAL
	handling.
	(insert_euse_in_preorder_dt_order_1): No more ELEFT_NODE's.
	(finalize_1): Ditto.
	(set_save): Ditto.
	(really_available_def): New function.
	(finalize_2): Use really_available_def, not EUSE_SAVE, during EPHI
	minimization.
	(names_match_p): Handle INDIRECT_REF properly.
	(call_modifies_slot): Removed.
	(add_call_to_ei): Removed.
	(process_left_occs_and_kills): Fix.
	(pre_expression): Zero out counts.
	(collect_expressions): Split out from tree_perform_ssapre. Do this
	in domtree order.
	(tree_perform_ssapre): Create and free alloc-pools.
	Rename new variables that need to be renamed.

	* tree.c (tree_size): Remove ELEFT_NODE.
	(tree_node_size): Ditto.
	(is_essa_node): Ditto.

	* tree.def (ELEFT_NODE): Gone.

	* tree.h (EREF_NODE_CHECK): No more ELEFT_NODE.
	(struct tree_eref_common): Add ID flag.
	(struct tree_euse_node): Add lval flag.
	(EREF_ID): New macro.
	(EUSE_LVAL): New macro.

2003-10-22  Daniel Berlin  <dberlin@dberlin.org>

	* tree-flow-inline.h (add_dom_child): XMALLOC, not GGC_ALLOC,
	the bitmap.
	(clear_dom_children): XFREE the bitmap.

2003-10-22  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-live.c (new_tree_live_info, (delete_tree_live_info,
	live_worklist, set_if_valid, add_livein_if_notdef,
	calculate_live_on_entry, calculate_live_on_exit,
	add_conflicts_if_valid, dump_live_info): Use bitmap instead of sbitmap.
	(build_tree_conflict_graph): Use bitmap, Change mechanism for
	adding conflicts between live-on-entry partitions.
	* tree-ssa-live.h (struct tree_live_info_d): Switch to bitmaps.
	(partition_is_global, live_entry_blocks, live_on_exit,
	live_merge_and_clear, make_live_on_entry): Switch to bitmaps.
	* tree-ssa.c (struct _elim_graph): Remove bitmaps, use varrays.
	(new_elim_graph, clear_elim_graph, delete_elim_graph): Switch from
	old bitmap implementation.
	(elim_graph_size): New. Number of elements in elimination graph.
	(elim_graph_add_node): New. Add an element to the elim-graph.
	(elim_graph_add_edge): New. Add an edge to the elim-graph.
	(elim_graph_remove_succ_edge): New. Remove an edge for which a node
	has a successor.
	(FOR_EACH_ELIM_GRAPH_SUCC): Find all successor nodes.
	(FOR_EACH_ELIM_GRAPH_PRED): Find all predeccesor nodes.
	(eliminate_name, eliminate_build, elim_forward,
	elim_unvisited_predecessor, elim_backward, elim_create, eliminate_phi):
	Use new elim-graph routines.
	(rewrite_out_of_ssa): Enable single-definition compaction when not
	combining temporaries.

2003-10-21  Richard Henderson  <rth@redhat.com>

	* gimplify.c: Sort functions into use order, and all gimplification
	functions to the end.

2003-10-22  Jeff Law  <law@redhat.com>

	* tree-cfg.c (thread_unconditional_jumps): New function.
	(tree_block_forwards_to): Likewise.
	(cleanup_tree_cfg): Call thread_unconditional_jumps.
	* tree-flow.h (bb_ann_t): Add forwardable status bit.

	* tree-dump.c (dump_files): Add entry for TDI_none.
	(dump_begin): Do nothing for TDI_none.
	(dump_enable_all, dump_switch_p): Start our scan at TDI_none + 1.
	* tree.h (tree_dump_index): Add.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): If we have altered the
	CFG and we have variables to [re]rename, go ahead and rename them before
	starting the next iteration of the dominator optimizer.

2003-10-21  Jason Merrill  <jason@redhat.com>

	* gimplify.c (gimplify_modify_expr): Require a regvar on either
	the lhs or rhs if we're dealing with a renameable type.
	(canonicalize_component_ref): New fn.
	(gimplify_compound_lval): Use it.
	(gimplify_conversion): Use it.
	(gimplify_expr): Lose redundant STRIP_MAIN_TYPE_NOPS.
	Discard conversions in void context.

2003-10-21  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (pre_expression): Free and allocate the
	ephi_pindex_htab and phi_pred_cache in this function only.
	(phi_pred_cache): New array to store cached phi preds, to avoid
	recomputation and unnecessary copying.
	(subst_phis): Use it.
	(added_phis): array of added phis that is marked for GC.

	* Makefile.in: Add tree-ssa-pre.c to the gtype files, and
	gt-tree-ssa-pre.h to the list of generated files.

2003-10-21  Jason Merrill  <jason@redhat.com>

	PR optimization/12661
	* tree-dfa.c (get_expr_operands): Handle TRUTH_NOT_EXPR.
	* tree-simple.c (is_gimple_rhs): Allow TRUTH_NOT_EXPR.
	* gimplify.c (gimplify_expr) <TRUTH_NOT_EXPR>: Don't rewrite to an
	EQ_EXPR.

2003-10-21  Jan Hubicka  <jh@suse.cz>

	* haifa-sched.c (choose_ready): Initialize index.
	* tree-tailcall.c (bb_optimize_tail_calls): Initialize has_return.
	* f/lex.c (ffelex_cfelex_): Initialize d.

2003-10-20  Diego Novillo  <dnovillo@redhat.com>

	Fix PR optimization/12688
	* tree-dfa.c (get_stmt_operands): Don't return early when dealing
	with an empty statement.
	* tree-ssa-ccp.c (set_rhs): If the expression has no side effects,
	replace the statement with an empty statement.

2003-10-20  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-dce.c (processed): Change to an sbitmap.
	(mark_necessary): Test bits in 'processed'.
	(tree_ssa_dce): Initialize/free processed as an sbitmap.

2003-10-20  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (bsi_prev): Also copy the context from the previous
	iterator.

2003-10-18  Richard Henderson  <rth@redhat.com>

	* builtins.c (simplify_builtin): Handle BUILT_IN_CONSTANT_P.

2003-10-18  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-tailcall.c: New.
	* Makefile.in (tree-tailcall.o): Add.
	* function.c (assign_parms): Setting of current_function_stdarg
	moved ...
	(allocate_struct_function): ... here.
	* tree-dump.c (dump_files): Add .tail dump.
	* tree-flow.h (tree_optimize_tail_calls): Declare.
	* tree-optimize.c (optimize_function_tree): Call
	tree_optimize_tail_calls.
	* tree.h (enum tree_dump_index): Add TDI_tail.

2003-10-18  Jan Hubicka  <jh@suse.cz>

	* tree-ssa-copyprop.c (move_var_to_scope):  Do not clear abstract
	origin for static variables.

2003-10-18  Jan Hubicka  <jh@suse.cz>

	* integrate.c (copy_decl_for_inlinig): Fix copying of copies.

2003-10-18  Jan Hubicka  <jh@suse.cz>

	* cgraphunit.c (cgraph_analyze_function):  Fix call of estimate_num_insns.

2003-10-17  Kazu Hirata  <kazu@cs.umass.edu>

	* ChangeLog.tree-ssa: Fix typos.
	* tree-alias-common.c: Fix comment typos.
	* tree-cfg.c: Likewise.
	* tree-dfa.c: Likewise.
	* tree-eh.c: Likewise.
	* tree-flow.h: Likewise.
	* tree-iterator.h: Likewise.
	* tree-mudflap.c: Likewise.
	* tree-ssa-ccp.c: Likewise.
	* tree-ssa-dce.c: Likewise.
	* tree-ssa-dom.c: Likewise.
	* tree-ssa-live.c: Likewise.
	* tree-ssa-live.h: Likewise.
	* tree-ssa-pre.c: Likewise.
	* tree-ssa.c: Likewise.

2003-10-17  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-dce.c (processed): New Global vector.
	(mark_necessary): Check if SSA_NAME has already been processed first.
	(find_useful_stmts, process_worklist): Change call to mark_necessary().
	(tree_ssa_dce): Initialize and free processed vector.
	* tree-cfg.c (handle_switch_fallthru): A new basic block can result
	from splitting edges of nested switch stmts.
	(handle_switch_split): If a new block is created, restart the loop for
	inserting GOTO's to handle the new block.

2003-10-17  Jan Hubicka  <jh@suse.cz>

	* tree-cfg.c (remove_useless_stmts_and_vars_bind): Fix handling of
	static variables.

2003-10-16  Richard Henderson  <rth@redhat.com>

	* common.opt (fdisable-gimple): Remove.
	* flags.h (flag_disable_gimple): Remove.
	* toplev.c (flag_disable_gimple): Remove.
	(process_options): Don't check it.
	(lang_independent_options): Don't set it.
	* opts.c (common_handle_option): Likewise.
	* gimplify.c (keep_function_tree_in_gimple_form): Don't check it.
	* c-semantics.c (expand_stmt_toplev): Likewise.
	* tree-optimize.c (tree_rest_of_compilation): Likewise.
	* doc/invoke.texi: Don't document it.

2003-10-16  Roger Sayle  <roger@eyesopen.com>

	* fold-const.c: Merge from mainline.
	* tree.c (associate_tree_code, commutative_tree_code): Use a
	switch statement instead of a sequence of comparisons.

2003-10-16  Richard Henderson  <rth@redhat.com>

	* gimplify.c (maybe_protect_cleanup): Remove.
	* tree-simple.h (maybe_protect_cleanup): Remove.
	* c-simplify.c (gimplify_cleanup): Don't call it.

2003-10-16  Jeff Law  <law@redhat.com>

	* tree-cfg.c (found_computed_goto): New global for computed goto
	factoring/unfactoring.
	(factored_computed_goto_label, factored_computed_goto): Likewise.
	(factor_computed_gotos): New function.
	(build_tree_cfg): Use it.
	(make_blocks): Record whether or not we find a computed goto.
	(remove_useless_stmts_and_vars): Un-factor computed gotos.
	(remove_useless_stmts_and_vars): Reset factored_computed_goto_label
	and factored_computed_goto.

	* tree-ssa-dom.c (get_value_for, set_value_for): Move to the start
	of the file.  Delete pointless sanity checking.

	* tree-ssa.c (currdefs): Now a varray instead of a hash table.
	(get_value_for, set_value_for): Corresponding changes.  Move to
	the start of the file and delete pointless sanity checking.
	(rewrite_into_ssa, dump_tree_ssa_stats): Corresponding changes.
	(var_value_hash, var_value_eq): Kill.

	* tree-ssa.c (rewrite_add_phi_arguments): Once we encounter a
	rewritten PHI break the inner loop.

	* tree-ssa.c (insert_phi_nodes_for): Use EXECUTE_IF_AND_COMPL_IN_BITMAP.

	* tree-dfa.c (create_phi_node):  Clear PHI_REWRITTEN on all new PHIs
	(remove_all_phi_nodes_for): Set PHI_REWRITTEN on any PHIs which are
	not removed.
	* tree-ssa.c (rewrite_add_phi_arguments): Check the PHI node itself
	to see if it has already been rewritten.
	* tree.h (PHI_REWRITTEN): New accessor macro.
	(struct phi_node): New field rewritten.

	* tree-flow.h (struct bb_ann_d): New field num_preds.
	* tree-dfa.c (create_phi_node): Get the number of predecessors from
	the block's annotation.
	* tree-ssa.c (rewrite_into_ssa): Compute number of preds for each
	block and store it into the block's annotation.
	(insert_phi_nodes_for): Get the number of preds for each block
	from the block's annotation.

	* tree-ssa.c: Remove parallel lifetime analysis code from April 2003.
	(def_blocks_d): Remove PHI_INSERTION_POINTS field.
	(compute_global_livein): Accept livein/def bitmaps to use for
	life analyis rather than a varray of variables.  Callers updated.
	Rewritten to compute life information for one variable at a
	time instead of several variables at once.
	(insert_phis_for_deferred_variables): Remove.
	(insert_phi_nodes_for): Lose varray argument.  Callers updated.
	No longer mess with deferring PHI insertions for variables.
	(insert_phi_nodes): No longer need to deal with deferred variables.
	Kill everything related to them.

2003-10-15  Jeff Law  <law@redhat.com>

	* domwalk.c, domwalk.h: New files.
	* Makefile.in (OBJS-common): Add domwalk.c.
	(tree-ssa-dom.o): Add dependency on $(BASIC_BLOCK_H) and domwalk.h.
	(tree-ssa.o): Add dependency on domwalk.h.
	(domwalk.o): Add dependencies.
	* tree-ssa-dom.c: Include domwalk.h.
	(cfg_altered, vars_to_rename): Now globals.
	(dom_walk_block_data): New structure for block data used by dominator
	walker.
	(optimize_block, record_equivalences_from_block_entry): Kill.
	(optimize_stmt): Lose "cfg_altered" argument.  Update callers.
	Initialize may_have_exposed_new_symbols.
	(get_value_for, set_value_for): Lose "table" argument.  Update
	callers.  Use const_and_copies table directly.
	(lookup_avail_expr): Lose "const_and_copies" argument.  Callers
	updated.
	(get_eq_expr_value): Similarly.  Also accept a pointer to the
	vrp_variables. Callers updated.
	(update_rhs_and_lookup_avail_expr): Similarly.
	(record_cond_is_true, record_cond_is_false): Similarly.
	(simplify_rhs_and_lookup_avail_expr): Similarly.
	(simplify_cond_and_lookup_avail_expr): Similarly.
	(record_equivalences_from_phis): Similarly.
	(record_equivalences_from_incoming_edge): Similarly.  Also accept
	a pointer to the block const_and_copies table and vrp_variables.
	Callers updated.
	(eliminate_redundant_computations): Similarly
	(record_equivalences_from_stmt, thread_through_successor): Similarly.
	(dom_opt_initialize_block): New function.  Perform block local
	initialization for the dominator optimizer.
	(dom_opt_finalize_block): Renamed from finalize_block.  Get
	block local varrays from walk_data.  Pop entry off block local
	data stack when complete.
	(dom_opt_walk_stmts): New function.
	(cprop_into_phis): Get block local varrays from walk_data.
	(record_range): Get vrp varray by reference than by value.
	(tree_ssa_dominator_optimize): Store incoming "vars" variable into
	global "vars_to_rename".  Initialize walk_data.  Use
	walk_dominator_tree.
	(cprop_into_stmt): Initialize may_have_exposed_new_symbols.
	* tree-ssa.c: Include domwalk.h
	(rewrite_finalize_block, rewrite_initialize_block): New functions
	extracted from rewrite_block.
	(rewrite_walk_stmts, rewrite_add_phi_arguments): Similarly.
	(rewrite_block): Kill.
	(rewrite_into_ssa): Initialize walk_data.  Use walk_dominator_tree.

2003-10-14  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_expr): Return bool.  Bail gracefully if
	fb_mayfail is set.
	(gimplify_asm_expr): Take pointer-to-expr.  Allow gimplify_expr
	to fail for lvalues, and issue appropriate error messages.  Zap
	the entire asm statement on failure.
	* tree-simple.h (enum fallback_t): Add fb_mayfail.

2003-10-14  Richard Henderson  <rth@redhat.com>

	* c-tree.h (C_LANG_TREE_NODE_CHAIN_NEXT): New.
	(union lang_tree_node): Use it for chain_next annotation.

2003-10-14  Richard Henderson  <rth@redhat.com>

	* c-common.c: Include tree-iterator.h.
	(c_expand_expr): Kill warn_unused_result checks.
	(c_warn_unused_result): New.
	* c-common.h (STMT_EXPR_WARN_UNUSED_RESULT): Remove.
	(c_warn_unused_result): Declare.
	* c-decl.c (finish_function): Always gimplify.  Call
	c_warn_unused_result.
	* calls.c (expand_call): Kill warn_unused_result checks.
	* Makefile.in (c-common.o): Update.

2003-10-15  Steven Bosscher  <steven@gcc.gnu.org>

	* cfghooks.c (dump_bb): Take extra `int indent' argument.
	* cfg.c (dump_bb): Take extra argument to match cfg hook.
	Write out all information about bb that is shared between the tree
	and rtl representations.
	* basic-block.c (dump_bb): Adjust prototype.
	* cfgrtl.c (rtl_dump_bb): Update prototype to match cfg hook.
	Use indent.
	* flow.c (verify_wide_reg, verify_local_live_at_start):
	Fixup dump_bb calls.
	* tree-cfg.c (dump_tree_bb): Rename to tree_dump_bb.  Remove unused
	 `prefix' argument.  Put in tree_cfg_hooks as cfg hook for dump_bb.
	(remove_bb, debug_tree_bb, dump_tree_cfg): Call dump_bb.
	* tree-ssa (dump_tree_ssa): Likewise.
	* tree-flow.h (dump_tree_bb): Replace with new tree_dump_bb
	prototype.
	* tree-pretty-print (dump_block_info): Match case of BLOCK, SUCC,
	PRED with dump_bb.

2003-10-14  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-ander.c (throwaway_global): Delete.
	(andersen_same_ponts_to_set): We handle all globals individually
	now.
	* tree-alias-common.c:  Remove doxygen markers.
	(get_alias_var_decl): Always create an alias var for globals now.
	Assign the global alias vars to GLOBAL_VAR, too.
	(intra_function_call): Fix logic, do a bit of pre-filtering to
	avoid useless global aliasing.
	(get_values_from_constructor): It's the same for field based and
	not field based.
	(create_alias_vars): Remove special global var handling.
	(same_points_to_set): Ditto.
	(ptr_may_alias_var): Ditto.

2003-10-14  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (cprop_into_phis): Avoid doing useless work if the
	edge we care about is abnormal.
	* tree-ssa-copyprop (cprop_phi): Avoid doing useless work if the
	destination of the PHI node occurs in an abnormal PHI.

	* tree-ssa-dom.c (record_equivalences_from_stmt): Renamed from
	record_equivalances.  Caller updated.
	(record_equivalences_from_phis): New function extracted from
	optimize_block.
	(record_equivalences_from_incoming_edge): Likewise.
	(record_equivalances_from_block_entry): Likewise.
	(cprop_into_phis): Likewise.
	(optimize_stmt): Lots of code moved into new functions.  Call
	record_equivlances_from_block_entry.

	* tree-ssa-dom.c (optimize_block): Simplify interface slightly.
	Use finalize_block.  Extract edge_flags from our block's
	incoming edge as necessary.  Simplify recursive call.
	(thread_through_successor): Extracted from optimize_block.
	(finalize_block): Similarly.

	* tree-ssa-dom.c (eliminate_redundant_computations): New function
	extracted from optimize_stmt.
	(record_equivalences): Similarly.
	(optimize_stmt): Use eliminate_redundant_computations and
	record_equivalences.  If fold_stmt changes stmt, then make sure
	to get a new annotation as well.

	* tree-cfg.c (cleanup_control_flow): Pass last statement down to
	cleanup_cond_expr_graph and cleanup_switch_expr_graph.
	(cleanup_cond_expr_graph): Accept statement from caller and
	use it.  Return nonzero if the predicate was constant.  No longer
	static.
	(cleanup_switch_expr_graph): Similarly.
	(disconnect_unreachable_case_labels): Similarly, except that it
	is still static.
	* tree-flow.h (cleanup_cond_expr_graph): Prototype.
	(cleanup_switch_expr_graph): Similarly.
	* tree-ssa-dom.c (optimize_stmt): Also optimize the condition
	in a SWITCH_EXPR.  Use COND_EXPR_COND and SWITCH_COND to get
	conditions instead of relying upon known operand positions.
	Use cleanup_cond_expr_graph and cleanup_switch_expr_graph rather
	than open coding equivalents.
	(lookup_avail_expr): Handle SWITCH_EXPRs.  Use COND_EXPR_COND and
	SWITCH_COND to get conditions instead of relying upon known
	operand positions.
	(avail_expr_hash, avail_expr_eq): Similarly.

2003-10-14  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_body): Save and restore input_location;
	initialize input_location to DECL_SOURCE_LOCATION.
	(gimplify_expr): Always save and restore input_location.

2003-10-14  Richard Henderson  <rth@redhat.com>

	* expr.c (expand_expr): Break out EXPR_LOCUS code from ...
	(expand_expr_1): ... here, renamed from expand_expr.

2003-10-13  Richard Henderson  <rth@redhat.com>

	* c-simplify.c (c_gimplify_stmt): Upreate on location_t and not
	fine and line individually.
	(gimplify_c_loop, gimplify_switch_stmt): Likewise.
	* gimplify.c (wfl_locus): Merge wfl_filename+wfl_lineno.
	(annotate_all_with_locus_1): Rename from annotate_stmt_with_file_line.
	(annotate_all_with_locus): Replace annotate_all_with_file_line;
	update all callers.
	* tree-simple.h: Update.
	* tree.c, tree.h (annotate_with_locus): New.

2003-10-13  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-flow-inline.h (def_ops): Take a stmt_ann_t as argument
	instead of a tree.
	(use_ops): Likewise.
	(vdef_ops): Likewise.
	(vuse_ops): Likewise.
	* tree-flow.h: Update prototypes.
	* tree-cfg.c (remove_stmt): Load the statement annotation.
	Adjust *_ops calls.
	* tree-dfa.c (compute_immediate_uses_for_stmt,
	mark_new_vars_to_rename): Likewise.
	* tree-pretty-print.c (dump_vops): Likewise.
	* tree-ssa-ccp.c (tree_ssa_ccp): Likewise.  Also remove now
	superfluous stmt_ann() calls.
	(visit_stmt, cpp_fold, add_var_to_ssa_edges_worklist,
	initialize, replace_uses_in, likely_value): Likewise.
	* tree-ssa-copyprop.c (copyprop_stmt): Likewise.
	* tree-ssa-dce.c (stmt_useful_p, process_worklist): Likewise.
	* tree-ssa-dom.c (cprop_into_stmt, optimize_stmt,
	avail_expr_hash, avail_expr_eq):
	Likewise.
	* tree-ssa-live.c (create_ssa_var_map, calculate_live_on_entry,
	build_tree_conflict_graph): Likewise.
	* tree-ssa-pre.c (maybe_find_rhs_use_for_var,
	expr_phi_insertion, same_e_version_real_occ_real_occ,
	generate_expr_as_of_bb, bool load_modified_real_occ_real_occ,
	bool same_e_version_phi_result, get_default_def,reaching_def,
	tree_perform_ssapre): Likewise.
	* tree-ssa.c (mark_def_sites, rewrite_out_of_ssa, rewrite_stmt):
	Likewise.

2003-10-12  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_array_ref_to_plus): Be prepared for
	null TYPE_DOMAIN or TYPE_MIN_VALUE for the array.
	* tree-ssa-ccp.c (fold_indirect_refs_r): Likewise.

2003-10-12  Richard Henderson  <rth@redhat.com>

	* tree.h (struct tree_common): Rename unused_1 to invariant_flag.
	(TREE_INVARIANT): New.
	* builtins.c (build_string_literal): Set TREE_INVARIANT.
	* c-common.c (fix_string_type): Likewise.
	* c-typeck.c (build_external_ref): Likewise.
	(build_c_cast, pop_init_level): Likewise.
	* fold-const.c (fold_convert, fold): Likewise.
	* tree.c (make_node, build_constructor): Likewise.
	(build, build1): Likewise.
	(staticp): Pass unknown component references to the language.
	(save_expr): Check TREE_INVARIANT instead of TREE_CONSTANT.
	(skip_simple_arithmetic): Likewise.
	(stabilize_reference_1): Likewise.
	* print-tree.c (print_node): Print TREE_INVARIANT.

	* c-common.c (pointer_int_sum): Rely on build to set TREE_CONSTANT.
	(finish_label_address_expr): Likewise.
	* c-typeck.c (default_function_array_conversion): Likewise.
	(parser_build_binary_op, pointer_diff): Likewise.
	(build_unary_op, build_binary_op): Likewise.
	* fold-const.c (non_lvalue): Likewise.

	* tree-pretty-print.c (dump_generic_node): Handle VIEW_CONVERT_EXPR.

2003-10-12  Richard Henderson  <rth@redhat.com>
	    Diego Novillo  <dnovillo@redhat.com>

	* gimplify.c (gimplify_array_ref_to_plus): Subtract the array
	domain minimum index.
	(gimplify_addr_expr): Expand ARRAY_REFs.  Cope with Fortran
	missing cast wierdnesses.
	* tree-dfa.c (get_expr_operands): Handle (&v + c); abort on
	other address invariants that should have been folded.
	(vdefs_disappeared_p): New.
	(mark_new_vars_to_rename): Use it.  Move from ...
	* tree-ssa-dom.c: ... here.
	* tree-flow-inline.h (is_unchanging_value): Remove; use
	is_gimple_min_invariant everywhere instead.
	(phi_ssa_name_p): New.
	* tree-must-alias.c (find_addressable_vars): Process PHIs.
	* tree-simple.c (is_gimple_min_invariant): Rename from
	is_gimple_const; allow non-static variable addresses; update callers.
	(is_gimple_val): Remove ADDR_EXPR checks.
	* tree-simple.h: Update.
	* tree-ssa-ccp.c (replace_uses_in): Add replaced_address argument.
	(substitute_and_fold): Use that to mark_new_vars_to_rename.
	(fold_indirect_refs_r): New.
	(fold_stmt): Use it.
	* tree-ssa-copyprop.c (copyprop_stmt): Call fold_stmt.
	* tree-ssa-dce.c (NECESSARY): Use asm_written_flag.
	(mark_necessary): Reject DECLs.
	* tree-ssa-live.c (register_ssa_partition): Use phi_ssa_name_p.
	* tree-ssa-pre.c (generate_expr_as_of_bb): Call fold_stmt if we
	replaced with constants.
	* tree-ssa.c (insert_copy_on_edge): Unwrap ADDR_EXPRs to set_is_used.
	(eliminate_build, coalesce_abnormal_edges, coalesce_vars): Use
	phi_ssa_name_p.

2003-10-09  Frank Ch. Eigler  <fche@redhat.com>

	java/12211
	* gimplify.c (gimplify_save_expr): Tolerate void-typed saved
	expressions.

2003-10-09  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (add_call_clobber_ops): If a variable is read-only,
	add a VUSE operand instead of VDEF.

2003-10-08  Jason Merrill  <jason@redhat.com>

	PR optimization/12525
	* tree-dfa.c (note_addressable): New fn, split out from...
	(add_stmt_operands): Here.
	(get_stmt_operands) <ASM_EXPR>: Call it for mem ops.
	* gimplify.c (gimplify_asm_expr): Call parse_input_constraint
	directly.  It's only a mem op if allows_mem is set.

2003-10-08  Diego Novillo  <dnovillo@redhat.com>

	PR/12187
	* tree-dfa.c (add_stmt_operand): Test against current_function_decl
	when checking for global variables.
	(may_access_global_mem_p): Likewise.
	(add_referenced_var): Likewise.
	Consider DECL_NONLOCAL variables call clobbered and used.
	(find_hidden_use_vars): Do not test for DECL_NONLOCAL variables.
	* tree-optimize.c (tree_rest_of_compilation): Test against
	current_function_decl when checking for global variables.
	* tree-ssa-ccp.c (get_default_value): Likewise.
	* tree-ssa-dce.c (need_to_preserve_store): Likewise.

2003-10-07  Jason Merrill  <jason@redhat.com>

	PR optimization/12525
	* gimplify.c (gimplify_asm_expr): If the constraint doesn't allow
	a register, call mark_addressable.  Split an in/out operand that
	does allow a register into separate input and output operands.

2003-10-06  Richard Henderson  <rth@redhat.com>

	* fold-const.c (fold): Fold (T1)((T2)X op Y) into (T1)X op Y,
	for suitable values of T1 & T2.

2003-10-06  Andrew Macleod  <amacleod@redhat.com>

	* tree-dfa.c (compute_immediate_uses): Add optional callback.
	(compute_immediate_uses_for_phi): Remove unused parameter. Add optional
	callback to determine if usage info should be calculated for variable.
	(compute_immediate_uses_for_stmt): Add optional callback to determine
	if usage info should be calculated for variable.
	* tree-flow.h (compute_immediate_uses): Update prototype.
	* tree-ssa-ccp.c (need_imm_uses_for): New. Callback function passed to
	compute_immediate_uses.
	(initialize): Calculate defaults initially, then build reduced
	immediate use information.
	(get_default_value): Non empty stmt's which are not a PHI_NODE or
	a MODIFY_EXPR default to VARYING.

2003-10-06  Andrew Macleod  <amacleod@redhat.com>

	* tree-cfg.c (tree_split_edge): Mark edge as FALLTHRU when splitting.

2003-10-03  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa.c (rewrite_block): Test vars_to_rename instead of
	PHI_ARG_CAPACITY.
	* tree-dfa.c (remove_phi_arg_num): Don't update
	PHI_ARG_CAPACITY.

2003-10-01  Richard Henderson  <rth@redhat.com>

	* c-decl.c (set_decl_nonlocal): New.
	(store_parm_decls): Use it via walk_tree.

2003-10-01  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (cprop_into_stmt): New function extracted from
	optimize_stmt.
	(optimize_stmt): Use cprop_into_stmt.

2003-09-30  Richard Henderson  <rth@redhat.com>

	* function.h (struct function): Add function_end_locus.
	* c-decl.c (finish_function): Set it.
	* tree-optimize.c (tree_rest_of_compilation): Set input_location
	to function_end_locus before expand_function_end.

	* tree-optimize.c (optimize_function_tree): Move calls to
	remove_useless_stmts_and_vars and lower_eh_constructs ...
	(tree_rest_of_compilation): ... here.

	* c-simplify.c (gimplify_expr_stmt): Don't warn for any statement
	with void result type.

2003-09-30  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (simplify_cond_and_lookup_avail_expr): Fix thinko
	in test for swapping ranges.

	* tree-ssa-dom.c (record_range): New function.
	(extract_range_from_cond): Likewise.
	(tree_ssa_dominator_optimize): Initialize the vrp_data varray.
	(optimize_block): Initialize the vrp_variables varray.  Wipe
	appropriate entries from the VRP varrays when done processing a block.
	(get_eq_expr_value): Accept new argument "bb".  Call record_range
	appropriately.  Refactor code to avoid useless work.
	(simplify_cond_and_lookup_avail_expr): Use value range records to
	simplify conditions.
	(simplify_rhs_and_lookup_avail_expr): When simplifying ABS_EXPR,
	DIV_EXPR and MOD_EXPR, use simplify_cond_and_lookup_avail_expr
	to determine the range of the given variable.

	* tree-ssa-dom.c (find_equivalent_equality_comparison): Do not
	look through a typecast which narrows a value.

2003-09-30  Paul Brook  <paul@nowt.org>

	* Makefile.in: Add rules for check-gfortran.

2003-09-29  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_cond_expr): Fix both arms dead return value.

2003-09-29  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (simplify_cond_and_lookup_avail_expr): New function.
	(find_equivalent_equality_comparison): Likewise.
	(optimize_block): Remove code to build a == c equivalence after
	seeing a == b and b == c.  Remove code to walk backwards
	though typecasts to record equivalences and move relevant parts
	into find_equivalent_equality_comparison.
	(optimize_stmt): Call simplify_cond_and_lookup_avail_expr.

2003-09-28  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_call_expr): Annotate all call_exprs.
	* tree-inline.c (expand_call_inline): Set input_location based
	on EXPR_LOCUS; save and restore input_location around that.
	(walk_tree): Do not set input_location.

2003-09-27  Graham Stott  <graham.stott@btinternet.com>

	* expr.c (expand_expr)[CATCH_EXPR]: Fix bogus return value.

2003-09-26  Andrew MacLeod  <amacloeod@redhat.com>

	* tree-ssa-dom.c (struct var_value_d): Remove.
	(const_and_copies): Change to a varray_type.
	(tree_ssa_dominator_optimize): Initialize const_and_copies as a varray.
	(optimize_block): Simply set the value in const_and_copies.
	(dump_dominator_optimization_stats): No hash stats for const_and_copies.
	(record_cond_is_true, record_cond_is_false,
	simplify_rhs_and_lookup_avail_expr, update_rhs_and_lookup_avail_expr):
	Parameter const_and_copies is now a varray_type.
	(var_value_hash, var_value_eq): Remove.
	(get_value_for, set_value_for): Access varray elements.
	(get_eq_expr_value): Parameter const_and_copies is now a varray_type.

	* tree-cfg.c (handle_switch_split): Update container of previous stmt.

2003-09-25  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (split_critical_edges): New function, temporarily
	disabled until some edge splitting/insertion problems are fixed.
	(opnum_of_ephi): Take an edge argument, constify. Use hash table lookup.
	Update all callers.
	(ephi_pindex_eq): New function.
	(ephi_pindex_hash): New function.
	(ephi_pindex_htab): New variable.
	(add_ephi_pred): Update hash table.
	(expr_phi_insertion): Don't free the bitmap returned by compute_idfs
	anymore.
	(idfs_cache): New variable.
	(compute_idfs): Rewrite to use cache as much as possible, and not
	recompute when we can avoid it.

2003-09-25  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-ander.c:  Fixup comment spacing.
	(andersen_op_assign):  Handle >2 operands case.

2003-09-24  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-dfa.c (compute_immediate_uses_for): Split up in two
	separate functions, one for PHIs and one for normal statements.
	(compute_immediate_uses_for_phi): New.
	(compute_immediate_uses_for_stmt): New.

2003-09-25  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_block): When EQ_EXPR_VALUE has the
	form DEST = SRC where both DEST and SRC are SSA_NAMEs also
	record SRC = DEST into the const and copies table.

	* tree-ssa-dom.c (optimize_block): Change tests which checked
	for SSA_VAR_P to only allow SSA_NAMEs.
	(get_value_for, set_value_for): Likewise.
	(lookup_avail_expr, get_eq_expr_value): Likewise.

2003-09-25  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-dce.c (pdom_info, needed_stmts): Remove.
	(NECESSARY): Define.
	(necessary_p): Check bit instead of hash table lookup.
	(clear_necessary): New. Clear necessary bit.
	(mark_necessary): Use bit instead of hash table. No control lookup.
	(mark_tree_necessary): Remove.
	(find_useful_stmts): Clear necessary bit before checking it.
	(stmt_useful_p): Remove GOTO_EXPR case. Check arms of COND_EXPR for
	GOTO. All other control flow stmts are necessary.
	(process_worklist): Dont look for control parents.
	(remove_dead_stmts): No dominattor info is necessary.
	(remove_dead_stmt): Don't need BB any more. Remove COND_EXPR by changing
	the condition to 'if (0)'. Abort on other control flow.
	(tree_ssa_dce): No longer need the hash table.
	(remove_conditional): Remove.

2003-09-25  Andreas Schwab  <schwab@suse.de>

	* tree-flow.h: Declare next_ssa_version.
	* tree-ssa-ccp.c: Remove conflicting declaration.
	* tree-ssa-live.c: Likewise.
	* tree.c (make_ssa_name): Likewise.

2003-09-24  Jason Merrill  <jason@redhat.com>

	* tree.h (DECL_SOURCE_LOCATION): Resurrect.
	(DECL_SOURCE_FILE, DECL_SOURCE_LINE): Likewise.
	(EXPR_LOCUS): Renamed from TREE_LOCUS.  Null for non-exprs.
	(SET_EXPR_LOCUS): New macro.
	(EXPR_FILENAME): Renamed from TREE_FILENAME.
	(EXPR_LINENO): Renamed from TREE_LINENO.
	(struct tree_common): Remove locus field.
	(struct tree_decl): Re-add locus field.
	(struct tree_expr): Add locus field.
	* c-aux-info.c, c-decl.c, coverage.c, c-parse.in, dbxout.c,
	diagnostic.c, dwarf2out.c, expr.c, function.c, gimplify.c,
	integrate.c, print-tree.c, stmt.c, tree.c, tree-cfg.c,
	tree-dump.c, tree-flow-inline.h, config/alpha/alpha.c,
	config/mips/mips.c: Adjust.

2003-09-24  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-ccp.c (enum latticevalue): Add UNINITIALIZED.
	(const_values, struct value_map_d): Remove hash table structures.
	(value_vector): New array of values.
	(get_value): Use value_vector instead of hash table. Mark inline.
	(visit_phi_node): Ignore arguments if the PHI result is already VARYING.
	(initialize): Initialize value vector instead of hash table.
	(finalize): Free value vector instead of hash table.
	(add_var_to_ssa_edges_worklist): Don't add to worklist if
	DONT_SIMULATE_AGAIN flag is set.
	(value_map_hash, value_map_eq): Delete.

2003-09-24  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_block): Create infrastructure for
	tracking const_and_copies equivalences which disappear when
	we leave the current block.  Use it for equivalences created
	by EQ_EXPR_VALUE.  Follow use-def chains for EQ_EXPR_VALUE
	equivalences and see if certain NOP_EXPRs can be ignored
	to create a block-local equivalence for const_and_copies.
	(optimize_stmt): Do not get confused by a cast of the return
	value from alloca or the address of a non-weak decl.

	* fold-const.c (fold_read_from_constant_string): New function.
	* tree.h (fold_read_from_constant_string): Prototype.
	* expr.c (expand_expr, case INDIRECT_REF):  Use it.
	(expand_expr, case ARRAY_REF): Likewise.  Put checking code
	inside an ENABLE_CHECKING.
	* tree-ssa-ccp.c (fold_stmt): Use fold_read_from_constant_string.
	* tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Likewise.

2003-09-23  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_block): Ignore "useless" type
	conversions in SWITCH_COND when creating equivalenecs at
	case labels.

2003-09-22  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_stmt): Addresses of non-weak symbols
	as well as dynamically allocated stack space are always nonzero.

	* tree-cfg.c (handle_switch_split): Properly mark the fallthru
	edge from SRC to DEST with EDGE_FALLTHRU.

2003-09-22  Daniel Berlin  <dberlin@dberlin.org>

	* tree-flow.h (struct bb_ann_d): Add erefs array.
	* tree-ssa-pre.c (handle_bb_creation): Remove ei parameter.
	Update caller.
	(struct expr_info): Remove erefs array.
	(append_eref_to_block): New function.
	(clear_all_eref_arrays): Ditto.
	(expr_phi_insertion): Use append_eref_to_block.
	(insert_occ_in_preorder_dt_order_1): Ditto.
	(subst_phis): Only copy expression, not the containing EUSE/EPHI.
	Update all callers to reflect this.
	(compute_will_be_avail): Update for per-block eref array.
	(handle_bb_creation): Ditto.
	(pre_expression): Ditto.
	(tree_perform_ssapre): Clear eref arrays when done with expression.

2003-09-22  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (dump_tree_bb): Remove superlfuous newlines.

2003-09-21  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (compute_alias_sets): Use TDI_alias instead of
	TDI_ssa.
	* tree-dump.c (dump_files): Add enties for TDI_alias, TDI_ssa1,
	TDI_dom1, TDI_ssa2, TDI_dce1, TDI_ssa3, TDI_dom2, TDI_ssa4,
	TDI_ssa5 and TDI_dce2.
	Remove entries for TDI_ssa, TDI_dom and TDI_dce.
	* tree.h (enum tree_dump_index): Similarly.
	(TDF_ALIAS): Remove.
	(TDF_VOPS): Change value.
	* doc/invoke.texi (-fdump-tree-alias): Document.
	* tree-flow.h (tree_warn_uninitialized): Remove unused variable.
	(rewrite_into_ssa): Add enum tree_dump_index argument.  Update all
	callers.
	(rewrite_out_of_ssa): Likewise.
	(tree_perform_ssa_pre): Likewise.
	(tree_ssa_dominator_optimize): Likewise.
	(tree_ssa_dce): Likewise.
	(tree_ssa_copyprop): Likewise.
	(tree_ssa_ccp): Likewise.
	Add sbitmap argument.
	(tree_compute_must_alias): Likewise.
	(mark_new_vars_to_rename): Declare.
	* tree-must-alias.c (tree_compute_must_alias): Do not call
	rewrite_into_ssa.
	Remove local vars_to_rename.  Use new argument instead.
	* tree-optimize.c (optimize_function_tree): Re-write optimization
	ordering to support passes that need the SSA form updated.
	Call tree_ssa_dominator_optimize.
	Re-arrange optimization ordering.
	* tree-ssa-ccp.c (substitute_and_fold): Take new argument
	vars_to_rename.
	Call mark_new_vars_to_rename.
	(visit_phi_node): Move variable 'val' into the right scope.
	(initialize): Move call dump_begin ...
	(tree_ssa_ccp): ... here.
	* tree-ssa-dom.c (mark_new_vars_to_rename): Declare extern.
	Make sure that variables in virtual operands aren't marked
	unnecessarily.
	* tree-ssa.c (rewrite_into_ssa): Do not call
	tree_ssa_dominator_optimize.

2003-09-21  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-dce.c (dom_info): Remove unused variable.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): If the CFG has been
	altered, call cleanup_tree_cfg.
	Call cleanup_tree_cfg before returning.
	* tree-ssa-pre.c (tree_perform_ssapre): Call get_stmt_operands
	before processing the statement.
	* tree-ssa-dom.c (thread_edge): Remove attribute EDGE_FALLTHRU from
	edge.

2003-09-21  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Break out of
	optimize_stmt.  Follow the def-use chains back for certain expressions
	to see if we can simplify the RHS of the current expression based
	on earlier expressions.

	* tree-ssa-dom.c (optimize_block): Rework code to propagate values
	into PHI nodes to be more efficient.

2003-09-20  Andrew MacLeod  <amacleod@redhat.com>

	* tree-flow.h (struct dataflow_d): Remove reaching fields, add 2 element
	vector of trees.
	* tree-flow-inline.h (immediate_uses): Rename to get_immediate_uses,
	return a dataflow object.
	(reaching_defs): Remove until needed.
	(num_immediate_uses): New. Return number of immediate uses.
	(immediate_use): New. Return a specified immediate use.
	* tree-dfa.c (add_immediate_use): Use new fields.
	(dump_immediate_uses_for): Use new interface.
	(create_phi_node): Chain to start of list.
	* tree-ssa-ccp.c (add_var_to_ssa_edges_worklist): Use new interface.
	* tree-ssa.c (compute_global_livein): Loop interchange.

2003-09-18  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_stmt): Allow optimizing the RHS of a
	MODIFY_EXPR even if we can't record any equivalences created by
	the MODIFY_EXPR.  Move code to simplify ABS_EXPR, TRUNC_DIV_EXPR
	and TRUNC_MOD_EXPR to an earlier position.

2003-09-19  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-ccp.c (cfg_edges): Rename to cfg_blocks.
	(cfg_blocks_num, cfg_blocks_head, cfg_blocks_tail): New. Queue markers.
	(bb_in_list): New. Vector indicating if a BB is in the cfg_blocks list.
	(tree_ssa_ccp): Use new routines.
	(add_control_edge): Add to cfg_blocks list.
	(initialize): Initialize new variables.
	(finalize): Free allocations.
	(cfg_blocks_empty): New. Is cfg_blocks queue list.
	(cfg_blocks_add): New. Add a basic block to cfg_blocks list.
	(cfg_blocks_pop): New. Get a basic_block from the list.

2003-09-18  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (struct rusv_data): Add may_throw, may_branch.
	(remove_useless_stmts_and_vars_1): Set them.
	(remove_useless_stmts_and_vars_goto): Likewise.
	(remove_useless_stmts_and_vars_tf): Transform to compound_expr
	if only fallthrough.
	(remove_useless_stmts_and_vars_tc): Kill region if nothrow.
	Detect catch regions that don't propagate exceptions.
	(remove_useless_stmts_and_vars): Zero entire data struct.

2003-09-18  Richard Henderson  <rth@redhat.com>

	* tree-eh.c (lower_try_finally_dup_block): New.
	(honor_protect_cleanup_actions, lower_try_finally_copy): Use it.

2003-09-18  Richard Henderson  <rth@redhat.com>

	* tree-cfg (remove_useless_stmts_and_vars_cond,
	remove_useless_stmts_and_vars_tf,
	remove_useless_stmts_and_vars_tc,
	remove_useless_stmts_and_vars_bind,
	remove_useless_stmts_and_vars_goto): Break out of ...
	(remove_useless_stmts_and_vars_1): ... here.  Rename to _1;
	take and use struct rusv_data.
	(remove_useless_stmts_and_vars): New.  Loop until no change.
	* tree-flow.h (remove_useless_stmts_and_vars): Update decl.
	* tree-ssa.c (rewrite_out_of_ssa): Don't loop here.

2003-09-18  Richard Henderson  <rth@redhat.com>

	* tree-pretty-print.c (dump_generic_node): Don't double indent asms.

2003-09-18  Richard Henderson  <rth@redhat.com>

	* tree-eh.c: Include langhooks.h, remove errors.h.
	(decide_copy_try_finally): Use estimate_num_insns to choose
	between copy and switch implementations.

	* c-common.c (c_estimate_num_insns): Take an expr, not a decl.
	* tree-inline.c (limits_allow_inlining): Pass it the body of the decl.

2003-09-18  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (lookup_avail_expr): New argument which indicates
	if the expression should be entered into the hash table.  All
	callers updated.
	(update_rhs_and_lookup_avail_expr): New function factored out
	of optimize_stmt.

	* tree.h (commutative_tree_code, associative_tree_code): Declare
	* tree.c (commutative_tree_code, associative_tree_code): New
	functions.
	(iterative_hash_expr): Use commutative_tree_code.
	* fold-const.c (operand_equal_p): Use commutative_tree_code
	rather than inlining the communitivy check.
	(fold, nondestructive_fold_binary_to_constant): Similarly.

2003-09-18  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (tree-eh.o): Add dependency on errors.h
	* tree-eh.c: Include errors.h

2003-09-17  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (remove_useless_stmts_and_vars): Revert last change.
	* tree-flow.h, tree-ssa.c: Likewise.

2003-09-17  Richard Henderson  <rth@redhat.com>

	* tree-eh.c (decide_copy_try_finally): Remove forgotten debug code.

2003-09-17  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (pick_ssa_name): New function.
	(code_motion): Use it.

2003-09-17  Richard Henderson  <rth@redhat.com>

	* tree-eh.c: New file.
	* Makefile.in (OBJS-common): Add it.
	(tree-eh.o): New.
	* calls.c (emit_call_1): New argument for full call expr.
	Check with lookup_stmt_eh_region to set REG_EH_REGION.
	(expand_call): Likewise for tail-calls.
	* except.c (struct eh_region): Add tree_label.
	(gen_eh_region, gen_eh_region_cleanup, gen_eh_region_try,
	gen_eh_region_catch, gen_eh_region_allowed,
	gen_eh_region_must_not_throw, get_eh_region_number,
	get_eh_region_may_contain_throw, get_eh_region_tree_label,
	set_eh_region_tree_label, expand_resx_expr): New.
	(expand_eh_region_start, expand_start_catch): Use them.
	(expand_end_catch): Tidy.
	(note_eh_region_may_contain_throw): Take region argument.
	(note_current_region_may_contain_throw): New.
	(get_exception_filter): Export.
	(collect_eh_region_array): Export.
	(remove_unreachable_regions): Check ERT_TRY based on reachability
	of catches, not reachability of continue_label.  Never remove
	ERT_MUST_NOT_THROW regions.
	(collect_rtl_labels_from_trees): New.
	(convert_from_eh_region_ranges): Use it.
	(connect_post_landing_pads): Handle dying cleanups.
	(struct reachable_info): Add callback data.
	(add_reachable_handler): Invoke the callback.
	(foreach_reachable_handler): New.
	(reachable_handlers): Use it.
	(arh_to_landing_pad, arh_to_label): New.
	(can_throw_internal_1): Split out from can_throw_internal.
	(can_throw_external_1): Similarly.
	* except.h: Update.
	* expr.c (expand_expr): Handle RESX_EXPR, FILTER_EXPR.
	* gimplify.c (gimplify_modify_expr): Use tree_could_trap_p.
	* stmt.c (using_eh_for_cleanups_p): Export.
	(expand_return): Allow any typed rhs.
	* timevar.def (TV_TREE_EH): New.
	* tree-cfg.c (eh_stack): Kill.
	(build_tree_cfg): Don't set it.  Kill code to handle EH.
	(could_trap_p): Move to tree-eh.c as tree_could_trap_p.
	(get_eh_region_type, make_try_expr_blocks, make_catch_expr_blocks,
	make_eh_filter_expr_blocks, try_finallys): Kill.
	(make_edges): Kill code to handle EH.
	(make_ctrl_stmt_edges): Kill TRY_FINALLY_EXPR, CATCH_EXPR,
	EH_FILTER_EXPR.  Handle RESX_EXPR.
	(make_call_expr_edges): Kill.
	(make_exit_edges): Use make_eh_edges.
	(label_to_block): New.
	(make_goto_expr_edges): Use it.
	(is_ctrl_stmt): Add RESX_EXPR.
	(is_ctrl_altering_stmt): Restructure.  Use tree_can_throw_internal.
	(last_exec_block, compute_reachable_eh): Kill.
	* tree-dfa.c (get_stmt_operands): Add RESX_EXPR.
	(get_expr_operands): Add FILTER_EXPR.
	* tree-dump.c (dump_files): Add tree-eh.
	* tree-flow.h (struct stmt_ann_d): Kill reachable_exception_handlers.
	(label_to_block, lower_eh_constructs, make_eh_edges,
	tree_could_trap_p, tree_could_throw_p, tree_can_throw_internal,
	tree_can_throw_external): Declare.
	* tree-optimize.c (optimize_function_tree): Call lower_eh_constructs.
	(tree_rest_of_compilation): Save tree for inlining.
	* tree-pretty-print.c (dump_generic_node): Handle FILTER_EXPR,
	RESX_EXPR.
	* tree-simple.c (is_gimple_stmt): Add RESX_EXPR.
	(is_gimple_val): Add FILTER_EXPR.
	* tree-ssa-dce.c (stmt_useful_p): Restructure.  Add lhs of
	EXC_PTR_EXPR or FILTER_EXPR.
	* tree.def (FILTER_EXPR, RESX_EXPR): New.
	* tree.h (enum tree_dump_index): Add TDI_eh.

2003-09-17  Richard Henderson  <rth@redhat.com>

	* tree.c (tsi_link_before): Remove unnecessary parens.
	(tsi_link_chain_before, tsi_delink): Likewise.
	(tsi_link_after): Accept the case if the iterator points
	to a NULL node; treat it as an empty list.
	(tsi_link_chain_after): Likewise.  Update iterator properly
	for TSI_CHAIN_END.

2003-09-17  Richard Henderson  <rth@redhat.com>

	* tree-inline.c (debug_find_tree_1, debug_find_tree): New.

2003-09-17  Richard Henderson  <rth@redhat.com>

	* tree-cfg.c (struct rusv_data): New.
	(remove_useless_stmts_and_vars_1): Rename from
	remove_useless_stmts_and_vars.  Use rusv_data.  Handle goto-next
	via remembering the last goto seen, and zapping it when appropriate.
	(remove_useless_stmts_and_vars): New.  Loop until done.
	* tree-flow.h (remove_useless_stmts_and_vars): Update decl.
	* tree-optimize.c (optimize_function_tree): Don't cache fnbody.
	Dump data after remove_useless_stmts_and_vars.
	* tree-ssa.c (rewrite_out_of_ssa): Kill loop around
	remove_useless_stmts_and_vars.
	* tree-dump.c (dump_files): Add .useless.
	* tree.h (enum tree_dump_index): Add TDI_useless.

2003-09-17  Diego Novillo  <dnovillo@redhat.com>

	* pretty-print.c (pp_write_text_to_stream): Export.
	* pretty-print.h (pp_write_text_to_stream): Declare.
	* tree-pretty-print.c (print_generic_stmt): Flush to file.
	(dump_generic_node): Call pp_write_text_to_stream.
	(maybe_init_pretty_print): Take file argument; associate the
	stream with the buffer.

2003-09-17  Jeff Law  <law@redhat.com>

	* tree-ssa-ccp.c (ccp_fold): If the return value has the wrong
	type, try to convert it to the proper type rather than failing.

	* tree-ssa-dom.c (optimize_stmt): Note that the statement is
	modified, even if we just change the virtual operands.  If
	the statement was modified by const/copy propagation, then
	set may_have_exposed_new_symbols.

2003-09-17  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (find_vars_r): Do not consider 'void *' pointers as
	dereferenced when scanning function call arguments.
	* tree-flow-inline.h (may_propagate_copy): Block propagation of
	pointers when they have different memory tags.
	* tree-ssa-copyprop.c (propagate_copy): When copy propagating
	pointers, abort if the two pointers don't have identical memory
	tags.

2003-09-16  Jeff Law  <law@redhat.com>

	* tree-ssa-ccp.c (visit_stmt): Do not set DONT_SIMULATE_AGAIN
	just because a statement as virtual definitions.
	(likely_value): A CALL_EXPR is assumed to return a VARYING
	result, regardless of its operands.

2003-09-15  Jason Merrill  <jason@redhat.com>

	* tree-simple.c (is_gimple_val): Allow addresses of all decls.
	(is_gimple_const): Allow addresses of all non-weak statics.
	* tree-ssa-ccp.c (fold_stmt): Return bool.
	* tree-flow.h: Adjust prototype.
	* tree-ssa-dom.c (optimize_stmt): If folding changed stuff, we
	need to recalculate the vops.

2003-09-13  Diego Novillo  <dnovillo@redhat.com>

	Fix PR optimization/12268
	* tree-dfa.c (add_referenced_var): Call-clobbered pointers may
	point to global memory.

2003-09-13  Jason Merrill  <jason@redhat.com>

	* c-common.c (c_apply_type_quals_to_decl): Unset TREE_READONLY for
	types with constructors.
	Remove superfluous references to TREE_TYPE (decl).

2003-09-13  Diego Novillo  <dnovillo@redhat.com>

	* opts.c (decode_options): Enable must-alias optimization by default.
	* tree-dfa.c (get_expr_operands): Always call add_stmt_operand when
	dealing with ADDR_EXPR nodes.
	(add_stmt_operand): If the variable has an alias set
	of size zero, abort.
	Call get_base_symbol() to retrieve the variable from an ADDR_EXPR
	node.
	(compute_alias_sets): Deep copy the aliases array when triggering
	the alias grouping heuristic.
	Don't group aliases if -ftree-must-alias is given.
	* tree-must-alias.c (tree_compute_must_alias): Call
	dump_referenced_vars when doing detailed dumps.
	Rename promoted_vars to vars_to_rename.  Update all users.
	(find_addressable_vars): Always mark statements modified.
	(promote_var): Also mark aliases of promoted variable to be
	renamed.
	Call find_variable_in and remove_element_from to update varrays for
	call-clobbered variables and alias sets.
	(find_variable_in): New local function.
	(remove_element_from): New local function.
	* varray.c (varray_copy): New function.
	* varray.h (varray_copy): Declare.

2003-09-13  Diego Novillo  <dnovillo@redhat.com>

	* tree-flow-inline.h (is_optimizable_addr_expr): Remove.  Update
	all users.
	* tree-ssa-dom.c (optimize_stmt): Do not propagate SSA names from
	redundant expressions across abnormal edges.

2003-09-13  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (remove_unreachable_blocks): Clean up.
	(debug_tree_bb_n): New.
	(is_ctrl_structure): Remove LOOP_EXPR.
	* tree-flow.h (debug_tree_bb_n): Declare.

2003-09-12  Andrew Macleod  <amacleod@redhat.com>

	* tree-ssa-live.c (calculate_live_on_entry): Use default_def to add
	addition checks to live on entry calculations.
	* tree-ssa.c (print_exprs_edge): New debug output function.
	(coalesce_abnormal_edges): Add basic block information to output.
	(coalesce_ssa_name): Use default_def instead of trying to compute live
	on entry variables.

2003-09-12  Diego Novillo  <dnovillo@redhat.com>

	* tree-optimize.c (tree_rest_of_compilation): Set TREE_ASM_WRITTEN
	for functions that have errors.

2003-09-12  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-pre.c (graph_dump_file, graph_dump_flags): Remove
	unused variables.

2003-09-11  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (reset_down_safe): Make test less conservative.
	(cba_search_start_from): Start from abnormal edge arguments, too.
	(cba_search_continue_from_to): Ditto here.

2003-09-11  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c: s/#if ENABLE_CHECKING/#ifdef ENABLE_CHECKING/g.
	Add more comments to DFS searching functions.
	(cba_search_reach_from_to): Remove empty function.
	(code_motion): Remove #if 0'd code.
	(pre_expression): Ditto.
	* tree.h (tree_dump_index): Remove TDI_predot.
	* tree-dump.c (dump_files): Ditto.

2003-09-11  Jason Merrill  <jason@redhat.com>

	Make EDGE_FALLTHRU meaningful for tree-cfg.
	* tree-cfg.c (make_edges): Set EDGE_FALLTHRU on fallthrough edge.
	(make_exit_edges): Likewise.
	(make_ctrl_stmt_edges): Don't set EDGE_FALLTHRU on edges into a
	control structure.
	(handle_switch_fallthru): Clear EDGE_FALLTHRU after inserting a goto.
	(find_insert_location): Only insert after a CALL_EXPR or MODIFY_EXPR.
	(bsi_insert_on_edge_immediate): Count outgoing abnormal edges.
	Insert before all control stmts.
	(bsi_link_after): Handle a block with nops after the last stmt.

	Rename some things to clarify difference between "control structures"
	(i.e. COND_EXPR) and "control statements" (also GOTO_EXPR).
	* basic-block.h (BB_CONTROL_STRUCTURE): Rename from BB_CONTROL_EXPR.
	* tree-cfg.c (REMOVE_NON_CONTROL_STRUCTS): Rename from
	REMOVE_NON_CONTROL_STMTS.
	(REMOVE_CONTROL_STRUCTS): Rename from REMOVE_CONTROL_STMTS.
	(make_ctrl_stmt_edges): Move GOTO_EXPR/RETURN_EXPR handling here...
	(make_exit_edges): ...from here.
	(is_ctrl_altering_stmt): Don't accept GOTO_EXPR/RETURN_EXPR.
	(is_ctrl_structure): Renamed from old is_ctrl_stmt.
	(is_ctrl_stmt): New fn.
	(bsi_move_to_bb_end): Use it.
	(stmt_starts_bb_p): Use is_ctrl_stmt and is_ctrl_altering_stmt.
	* tree-flow.h: Add prototype.
	* tree-ssa-ccp.c, tree-ssa-dom.c: Update for name changes.

2003-09-10  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (ephi_has_bottom): Remove dead function.
	(ephi_has_unsafe_arg): New function.
	(compute_down_safety): Use it.
	(reset_down_safe): Continue search on abnormal edges, too.

2003-09-10  Jason Merrill  <jason@redhat.com>

	* gimplify.c (gimplify_asm_expr): Add post_p parm.
	(get_initialized_tmp_var): Add post_p parm.
	(internal_get_tmp_var): Likewise.
	(gimplify_expr, get_formal_tmp_var): Pass it.
	* c-simplify.c (gimplify_decl_stmt): Pass it.
	* tree-simple.h: Adjust prototype.

	* tree-cfg.c (make_call_expr_edges): Break out from...
	(make_exit_edges): ...here.  Check TREE_NOTHROW.
	(is_ctrl_altering_stmt): Check TREE_NOTHROW.

2003-09-10  Paul Brook  <paul@nowt.org>

	* gimplify.c (gimplify_compound_lval): Treat REALPART_EXPR and
	IMAGPART_EXPR the same as COMPONENT_REF.
	* tree-simple.c (is_gimple_addr_expr_arg): Ditto.
	(is_gimple_lvalue): Remove REALPART_EXPR and IMAGPART_EXPR.

2003-09-10  Diego Novillo  <dnovillo@redhat.com>

	* c-pretty-print.c (decl_name_str): New local function.
	(pp_c_direct_declarator): Call it.
	(pp_c_primary_expression): Call it.
	(pp_c_id_expression): Call it.
	(pp_c_statement): Call it.

2003-09-10  Diego Novillo  <dnovillo@redhat.com>

	* tree-pretty-print.c (dump_generic_node): Change string used to
	display _DECL nodes with no DECL_NAME.

2003-09-10  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (add_referenced_var): Handle cases when argument
	walk_state is NULL.
	(add_referenced_tmp_var): New function.
	* tree-flow.h (add_referenced_tmp_var): Declare it.
	* tree-ssa-pre.c (pre_expression): Call it.
	* tree-ssa-live.c (create_ssa_var_map): Add checking for variables
	being in real and virtual operands.

2003-09-01  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
	    Jeff Law  <law@redhat.com>

	* tree-flow.h (remove_unreachable_blocks): Declare.
	* tree-cfg.c (remove_unreachable_blocks): Export. Return true
	if blocks were removed.
	* tree-ssa-dom.c (optimize_block, optimize_stmt): Record whether
	the cfg has changed.  Schedule jump threading.  If a block
	has more than one pred, then do not record equivalences created
	by a controlling COND_EXPR.
	(edges_to_redirect, redirection_targets): New variables.
	(thread_edge): Split out of optimize_block.
	(tree_ssa_dominator_optimize); Remove unreachable blocks and
	recompute dominator tree when the cfg changes.

2003-09-07  Steven Bosscher  <steven@gcc.gnu.org>

	* c-tree.h: Don't declare c_genericize, it's already
	declared in c-common.h.

2003-09-07  Steven Bosscher  <steven@gcc.gnu.org>

	Fix PR optimization/12198
	* tree-cfg.c (value_matches_some_label): Handle integer
	case ranges.

2003-09-06  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-iterator.h (tsi_iterator_update): Added TSI_CHAIN_START,
	TSI_CHAIN_END, TSI_CONTINUE_LINKING and comments.
	(tsi_link_chain_before, tsi_link_chain_after): Declare.
	* tree.c (tsi_link_chain_before, tsi_link_chain_after): New.
	(tsi_link_before, tsi_link_after): Handle new TSI_...
	positions.

2003-09-06  Diego Novillo  <dnovillo@redhat.com>

	* varray.c (element): Add entry for 'tree *'.
	* varray.h (enum varray_data_enum): Add VARRAY_DATA_TREE_PTR.
	(union varray_data_tag): Add entry for 'tree *'.
	(VARRAY_TREE_PTR_INIT): Define.
	(VARRAY_TREE_PTR): Define.
	(VARRAY_PUSH_TREE_PTR): Define.
	(VARRAY_TOP_TREE_PTR): Define.
	* tree-cfg.c: Replace uses of VARRAY_GENERIC_PTR with
	VARRAY_TREE_PTR when accessing operand arrays.
	* tree-ssa-ccp.c: Likewise.
	* tree-ssa-copyprop.c: Likewise.
	* tree-ssa-dce.c: Likewise.
	* tree-ssa-dom.c: Likewise.
	* tree-ssa-live.c: Likewise.
	* tree-ssa-pre.c: Likewise.
	* tree-dfa.c: Likewise.
	* tree-ssa.c: Likewise.
	* tree-flow.h (struct operands_d): Remove 'skip' GC markers from
	all fields.
	(struct dataflow_d): Likewise.

2003-09-05  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (find_referenced_vars): Re-enable .GLOBAL_VAR
	optimization.

2003-09-05  Daniel Berlin  <dberlin@dberlin.org>

	* tree.h (tree_eref_common): Make stmt a tree, not a tree *.
	* tree-ssa-pre.c: Transform all tree *'s to tree.

2003-09-05  Paul Brook  <paul@nowt.org>

	* tree.h (enum tree_index): Delete TI_SIGNED_SIZE_TYPE here.
	(signed_size_type_node): No longer a member of global_trees.
	* c-common.h (enum c_tree_index): New member CTI_SIGNED_SIZE_TYPE.
	(signed_size_type_node): Moved, now a member of c_global_trees.

2003-09-05  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (find_referenced_vars): Temporarily disable
	.GLOBAL_VAR optimization.

2003-09-04  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c:  Add overview.
	* tree-alias-ander.c: Add overview and more specific comments on what
	each function does.

2003-09-04  Diego Novillo  <dnovillo@redhat.com>

	* tree-optimize.c (tree_rest_of_compilation): Return if errorcount
	or sorrycount are non-zero.

2003-09-04  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (cleanup_tree_cfg): Traverse basic blocks
	with FOR_EACH_BB.
	(remove_useless_stmts_and_vars): Likewise.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Likewise.
	* tree-ssa.c (rewrite_into_ssa): Likewise.
	* tree-dfa.c (remove_all_phi_nodes_for): Make sure that the new
	list of PHI nodes is NULL-terminated.
	Add sanity checks to make sure all the PHI nodes for variables to
	rename are gone.

2003-09-04  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (struct walk_state): Add field 'num_calls'.
	(add_call_clobber_ops): New local function.
	(add_call_read_ops): New local function.
	(get_expr_operands): Call them.
	(add_stmt_operand): Call-clobbered variables are always added to
	virtual operands.
	(find_referenced_vars): If the number of call-clobbered variables
	and number of call sites is larger than a certain threshold, group
	all call-clobbered variables under .GLOBAL_VAR.
	(find_vars_r): Count the number of call sites.
	Don't add .GLOBAL_VAR to the list of referenced variables.
	(add_referenced_var): If the addressable variable is an array,
	register alias set of the type of the elements, not the type of the
	array.
	* tree-ssa-dom.c (mark_new_vars_to_rename): Rename from
	find_new_vars_to_rename.  Update all users.
	Before scanning the statement for new operands, mark the existing
	virtual operands to be renamed again.
	(optimize_stmt): Also check for newly exposed variables when doing
	redundancy elimination.
	* tree-ssa.c (rewrite_into_ssa): Don't abort when rename_count is
	greater than 2.  Simply stop trying at 3.
	(prepare_operand_for_rename): New function.
	(mark_def_sites): Call it.
	(rewrite_stmt): Don't check if the operand is an SSA_NAME before
	calling rewrite_operand.
	(rewrite_operand): Don't abort if the operand was already an
	SSA_NAME.  Ignore it.

2003-09-03  Richard Henderson  <rth@redhat.com>

	* tree-optimize.c (set_save_expr_context, clear_decl_rtl,
	tree_rest_of_compilation): Merge from mainline new file.
	* Makefile.in (tree-optimize.o): Update.
	* c-semantics.c (expand_stmt_toplev): New.
	* c-common.h (expand_stmt_toplev): Declare.
	* c-lang.c, objc/objc-lang.c (LANG_HOOKS_RTL_EXPAND_STMT): Use it.

2003-09-03  Richard Henderson  <rth@redhat.com>

	* gimplify.c (gimplify_switch_expr): Leave the outermost cast
	as part of the switch condition.

2003-09-02  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (tree.o): Add dependency on $(BASIC_BLOCK_H) and
	$(TREE_FLOW_H)
	* tree.c: Include basic-block.h and tree-flow.h
	(tsi_link_after): Adjust basic block tree pointers when inserting a
	new COMPOUND_EXPR.

2003-09-02  Richard Henderson  <rth@redhat.com>

	* c-decl.c (finish_function): Fix misapplied patch.  Don't
	free_after_parsing or free_after_compilation.  For real this time.

2003-09-01  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (finalize_1):  Remove unnecessary call to
	insert_euse_in_preorder_dt_order.
	(code_motion): Ditto.
	(pre_expression): Ditto.

2003-09-01  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>
	    Jeff Law  <law@redhat.com>

	* basic-block.h (BB_LOOP_CONTROL_EXPR): Remove.
	* c-simplify.c (gimplify_c_loop): Create loops in a better shape.
	* cfgloop.h (create_loop_notes): Declare.
	* cfgloopmanip.c (create_loop_notes): New.
	* explow.c (probe_stack_range): Don't produce loop notes when we
	recreate them.
	* expr.c (emit_block_move_via_loop): Ditto.
	* gimplify.c (build_and_jump): Export.
	(gimplify_loop_expr): Don't produce LOOP_EXPRs.
	* toplev.c (rest_of_compilation): Recreate loop notes if needed.
	* tree-cfg.c (make_loop_expr_edges, make_loop_expr_blocks): Removed.
	(find_contained_blocks, make_ctrl_stmt_edges,
	remove_useless_stmts_and_vars, stmt_ends_bb_p, bsi_insert_before,
	find_insert_location, bsi_insert_on_edge_immediate,
	merge_tree_blocks): Remove handling of LOOP_EXPRs.
	(remove_stmt): Remove handling of BB_LOOP_CONTROL_EXPR.
	(find_taken_edge): Remove comment on LOOP_EXPRs.
	(dump_tree_bb): Don't dump loop-related information.
	(is_loop_stmt, is_latch_block_for): Removed.
	(find_insert_location): Handle TRY_CATCH and TRY_FINALLY.
	* tree-flow.h (is_loop_stmt, loop_body, set_loop_body,
	is_latch_block_for): Removed.
	* tree-dfa.c (get_stmt_operands): Don't handle LOOP_EXPRs.
	* tree-simple.c (is_gimple_stmt): Remove handling of LOOP_EXPRs.
	* tree-simple.h: Remove LOOP_EXPRs from gimple grammar comment.
	(build_and_jump): Declare.
	* tree-ssa.c (remove_annotations_r): Don't handle LOOP_EXPRs.

2003-08-29  Daniel Berlin  <dberlin@dberlin.org>

	* opts.c (decode_options): Turn on SSAPRE by default.

2003-08-29  Jason Merrill  <jason@redhat.com>

	* builtins.c (simplify_builtin): Make sure that the replacement
	has the same type as the original expression.
	(simplify_builtin_strpbrk): Fix type of COMPOUND_EXPR.
	(simplify_builtin_strncpy, simplify_builtin_memcmp): Likewise.
	(simplify_builtin_strncmp, simplify_builtin_strncat): Likewise.
	(simplify_builtin_strspn, simplify_builtin_strcspn): Likewise.
	(simplify_builtin_fputs, simplify_builtin_sprintf): Likewise.

2003-08-28  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* builtins.c (expand_builtin): Expand BUILT_IN_STACK_SAVE and
	BUILT_IN_STACK_RESTORE.
	* builtins.def (BUILT_IN_STACK_SAVE, BUILT_IN_STACK_RESTORE): New.
	* gimplify.c (build_stack_save_restore): New functions.
	(struct gimplify_ctx): New field save_stack.
	(gimplify_bind_expr, gimplify_call_expr): Arrange save of stack on
	BIND_EXPR entry and restore on exits.
	* stmt.c (expand_stack_alloc): Saving of stack removed.
	(expand_stack_save, expand_stack_restore): New.
	* tree.h (expand_stack_save, expand_stack_restore): Declare.

2003-08-28  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (add_vdef): Check for duplicate voperands first.
	Handle SSA_NAME in voperands.
	(add_vuse): Likewise.

2003-08-27  Diego Novillo  <dnovillo@redhat.com>

	* tree-flow.h (var_ann_d): Convert is_in_va_arg_expr into a
	bitfield.

2003-08-27  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c: Update comments to reflect reality.
	(insert_one_operand): Remove #if'0d code.

2003-08-27  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* gcov.c (typedef struct arc_info): New field cs_count.
	(accumulate_line_counts): Find cycles correctly.

2003-08-27  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (compute_du_info): Move #if ENABLE_CHECKING up one
	line.

2003-08-27  Daniel Berlin  <dberlin@dberlin.org>

	* tree.h (struct ephi_arg_d): New structure.
	(struct eref_common): Remove non-used members, move some members
	elsewhere.
	(struct ephi_node): Ditto.

	* tree-optimize.c (optimize_function_tree): Move PRE before DCE.

	* tree.c (tree_size): use sizeof (struct ephi_arg_d) for ephi's.

	* tree-pretty-print.c (dump_generic_node): Re-teach to pretty
	print euses/ephis/etc given new structures, members, and
	relationships.

	* tree-ssa-pre.c (fixup_domchildren): Removed.
	(a_dom_b): Ditto.
	(calculate_preorder): Ditto.
	(defs_match_p): Ditto.
	(defs_y_dom_x): Ditto.
	(compute_can_be_avail): Ditto.
	(reset_can_be_avail): Ditto.
	(reset_later): Ditto.
	(compute_later): Ditto.
	(repair_*): Ditto.
	(set_replacement): Ditto.
	(remove_ephi): Ditto.
	(set_expruse_def): Ditto.
	(occ_compare): Ditto.
	(defs_hash_expr): Ditto.
	(compute_dt_preorder): Ditto
	(search_dt_preorder): Ditto.
	(ephi_operand_for_pred): Ditto.
	(injured_ephi_operand): Ditto.
	(compute_stops): New function.
	(occ_identical_to): Ditto.
	(require_phi): Ditto.
	(do_ephi_df_search_1): Ditto.
	(do_ephi_df_search): Ditto.
	(any_operand_injured): Ditto.
	(compute_du_info): Ditto.
	(add_ephi_use): Ditto.
	(insert_one_operand): Ditto.
	(add_ephi_pred): Ditto.
	(created_phi_preds): New bitmap.
	(dfn) Removed static variable.
	(idom_of_ephi): Ditto.
	(avdefs): Move into expr_info).
	(struct ephi_use_entry): New structure for EPHI uses.
	(struct ephi_df_search): New structure for depth first searchs.
	(cant_be_avail_search): Implementation of structure for
	cant_be_avail search.
	(stops_search): Ditto for stops.
	(replacing_search): Ditto for replacing_search.
	(do_proper_save): Arguments changed, callers updated.
	(create_ephi_node): Use sizeof (struct ephi_arg_d).
	(ephi_has_bottom): Rewrite for updated ephi-pred handling.
	(ephi_will_be_avail): Rewrite in terms of CANT_BE_AVAIL and STOPS.
	(expr_phi_insertion): Remove dead code.
	Update for new flags.
	(insert_occ_in_preorder_dt_order_1): Only insert one ephi-pred per
	block.
	Fix exit occurence handling.
	(rename_1): Remove occs stuff.
	Update for new ephi-pred handling.
	(reset_down_safe): Update for new ephi-pred handling.
	(compute_down_safe): Ditto.
	(can_insert): Ditto.
	(insert_one_operand): Split out from finalize_1.
	(finalize_1): Update for new ephi-pred handling.
	Only insert non-pointless, will-be-avail phis, rather than *all*
	ephis.
	(get_temp): New function. Hand us the right temporary for a given
	EPHI/EUSE.
	(code_motion): Use EREF_TEMP again, now that we can do it
	properly.

2003-08-26  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* builtins.c (expand_builtin): Handle STACK_ALLOC.
	* builtins.def (BUILT_IN_STACK_ALLOC): New.
	* c-simplify.c (gimplify_decl_stmt, c_gimplify_stmt,
	gimplify_compound_literal_expr): Arrange explicit stack allocation.
	* expr.c (expand_expr): Handle deferred variables.
	* stmt.c (expand_stack_alloc): New.
	* tree-simple.c (is_gimple_val): Prevent ADDR_EXPRs of vla's from
	being reduced.
	* tree.h (expand_stack_alloc): Declare.

2003-08-26  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa.c (build_dominator_tree): Use FOR_EACH_BB.

2003-08-26  Jason Merrill  <jason@redhat.com>

	* tree-simple.c (is_gimple_val): Also disallow memory vars.

2003-08-25  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* integrate.c (copy_decl_for_inlining): Reset DECL_TOO_LATE.

2003-08-25  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa-dom.c (optimize_block): Handle empty source block.

	* tree-ssa-dom.c (optimize_block):  Handle case when dominance
	tree children have also other sucessors.  Add dump to jump
	threading.

2003-08-25  Jason Merrill  <jason@redhat.com>

	* c-simplify.c (mark_labels_r): New fn.
	(gimplify_decl_stmt): Use it to mark labels in static initializers.
	* tree-simple.c (is_gimple_initializer): Remove.
	(is_gimple_reg_type): New fn.
	(is_gimple_reg): Use it.  Handle SSA_NAMEs properly.
	* tree-simple.h: Adjust.
	* gimplify.c (gimplify_expr) <CONSTRUCTOR>: Do nothing here.

	* gimplify.c (create_tmp_var): Set DECL_IGNORED_P.

	* tree-inline.c (initialize_inlined_parameters): Improve error
	recovery.

	* gimplify.c (gimplify_boolean_expr): Just replace with a COND_EXPR.

2003-08-25  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (get_expr_operands): Don't create shared operands when
	folding *&VAR expressions.

2003-08-24  Diego Novillo  <dnovillo@redhat.com>

	* tree-flow.h (struct var_ann_d): Add field default_def.
	(widen_bitfield): Declare.
	(set_default_def): Declare.
	(default_def): Declare.
	* tree-flow-inline.h (set_default_def): New inline function.
	(default_def): New inline function.
	* tree-dfa.c (dump_variable): Display default_def, if set.
	* tree-simple.c (is_gimple_reg): Check for DECL_P before checking
	for DECL_EXTERNAL.
	* tree-ssa-dom.c (add_expr_propagated_p): Remove.  Update all
	users.
	(find_new_vars_to_rename): New local function.
	(tree_ssa_dominator_optimize): Add new argument vars_to_rename.
	Change return type to void.  Update all users.
	(optimize_block): Add new argument vars_to_rename.  Update all
	users.
	If the call to optimize_stmt returns true, add the statement to the
	list of statements to re-scan for operands.
	After optimizing the block and its dominator children, call
	find_new_vars_to_rename for every statement that may have had new
	symbols exposed.
	(optimize_stmt): Change return type to bool.  Return true if the
	statement may have had new symbols exposed by optimization.
	Add a sanity check for the value returned by lookup_avail_expr.
	Create equivalences for more memory stores, not just the ones done
	via INDIRECT_REF expressions.
	Call widen_bitfield when optimizing stores to bitfields.
	(lookup_avail_expr): Reformat comment.
	* tree-ssa.c (rewrite_into_ssa): Remove local variable
	addr_expr_propagated_p.
	Clear out vars_to_rename before running dominator optimizations.
	(check_for_new_variables): Remove.
	(rewrite_stmt): Always register new definitions and virtual
	definitions.
	(register_new_def): Update comment.
	(get_reaching_def): Update the default_def field for the variable
	if it didn't have a reaching definition.
	* tree-ssa-ccp.c (widen_bitfield): Declare it extern.

2003-08-23  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (bsi_next_in_bb): Work correctly when the block ends
	with start of BIND_EXPR.

2003-08-23  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-ander.c (andersen_op_assign): Fix to join the operands,
	the assign to the lhs.

2003-08-23  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c (get_alias_var): Remove REFERENCE_EXPR.
	(find_func_aliases): Fix some not quite right predicates, add ARRAY_REF
	handling.

2003-08-22  Jeff Law  <law@redhat.com>

	* tree-dfa.c (compute_alias_sets): A memory tag used for stores can
	not conflict with objects marked TREE_READONLY.

	* tree-ssa-ccp.c (fold_stmt): Optimize reads from constant strings.

2003-08-22  Jason Merrill  <jason@redhat.com>

	* tree-simple.c: Total overhaul to only check forms and remove
	unnecessary predicates.
	(is_gimple_const): Accept function addresses here.
	Don't accept LABEL_DECL or RESULT_DECL.
	(is_gimple_val): Accept EXC_PTR_EXPR here.
	(is_gimple_lvalue): Rename from is_gimple_modify_expr_lhs.
	Accept BIT_FIELD_REF, REALPART_EXPR and IMAGPART_EXPR here.
	(is_gimple_addr_expr_arg): Replace with former is_gimple_varname.
	(is_gimple_constructor_elt): Just check for CONSTRUCTOR.
	(is_gimple_initializer): Just hand off to is_gimple_rhs.
	(is_gimple_rhs): Recognize most expressions here.
	(is_gimple_variable): New fn.
	(is_gimple_id): Use it.  Now static.
	(is_gimple_reg): New fn.
	(is_gimple_cast): Replace with former is_gimple_cast_op.
	(is_gimple_constructor, is_gimple_expr): Remove.
	(is_gimple_modify_expr, is_gimple_relop): Remove.
	(is_gimple_binary_expr, is_gimple_unary_expr): Remove.
	(is_gimple_call_expr, is_gimple_arglist): Remove.
	(is_gimple_compound_lval, is_gimple_arrayref): Remove.
	(is_gimple_compref, is_gimple_exprseq): Remove.
	(is_gimplifiable_builtin): Remove.
	* tree-simple.h: Adjust.
	* gimplify.c (gimplify_conversion): Break out from gimplify_expr.
	(gimplify_expr): Use is_gimple_reg predicate to force a temp.
	<COMPONENT_REF>: Use gimplify_compound_lval.
	<REALPART_EXPR, IMAGPART_EXPR>: Likewise.
	<INDIRECT_REF>: Use is_gimple_reg predicate.
	<MIN_EXPR, MAX_EXPR>: Use new gimplify_minimax_expr.
	<TREE_LIST>: Reject.
	(gimplify_tree_list, gimplify_component_ref): Remove.
	(gimplify_compound_lval): Include REALPART_EXPR and IMAGPART_EXPR.
	(gimplify_component_ref): Remove.
	(gimplify_call_expr): Handle non-gimplifiable builtins and walking
	the argument list here.
	(gimplify_tree_list): Remove.
	(gimplify_addr_expr): Use fb_either.
	* tree-simple.h: Adjust.
	* tree-alias-common.c (find_func_aliases): Update use of predicates.

2003-08-21  Andrew Pinski  <pinskia@physics.uc.edu>

	* tree-ssa.c (tree_ssa_useless_type_conversion): Check also the
	precision of the type to make sure they are really useless type
	conversions.

2003-08-21  Diego Novillo  <dnovillo@redhat.com>

	* tree-dump.c (dequeue_and_dump): Handle 'r' and 's' code classes.

2003-08-21  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* c-pretty-print.c (print_c_tree): Create new pp object.

2003-08-21  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Don't free hash tables
	before statistics are made from them.
	* tree-ssa.c (rewrite_into_ssa): Ditto.

2003-08-21  Jason Merrill  <jason@redhat.com>

	* tree-inline.c (copy_body_r): Don't convert when stripping &*.
	Fix thinko in stripping *&.

2003-08-21  Diego Novillo  <dnovillo@redhat.com>
	    Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-cfg.c (stmt_starts_bb_p): Nonlocal and computed GOTO targets
	always start a new block.

2003-08-20  Jason Merrill  <jason@redhat.com>

	* tree-pretty-print.c (dump_generic_node): Just print "<retval>"
	for the RESULT_DECL.

	* c-simplify.c (make_type_writable, mostly_copy_tree_r): Remove.
	(deep_copy_list, deep_copy_node): Remove.

	* expr.c (expand_expr): Don't check for 'r' or 's' if we're
	checking IS_EXPR_CODE_CLASS.
	* tree-dfa.c (may_access_global_mem_p): Likewise.
	* tree-browser.c (browse_tree): Likewise.
	* tree-ssa-pre.c (defs_hash_expr): Likewise.
	* gimplify.c (gimplify_expr): Likewise.
	(internal_get_tmp_var): Only copy TREE_LOCUS from an expr.
	(mostly_copy_tree_r): Ignore decls here.

2003-08-20  Diego Novillo  <dnovillo@redhat.com>

	* c-pretty-print.c: Discard.  Replace with same file from
	mainline.  Update all users.
	(print_c_tree): New function.
	* c-pretty-print.h (print_c_tree): Declare.
	* tree-pretty-print.c: Update to use new pp_* primitives.
	* c-simplify.c: Include c-pretty-print.h.
	* Makefile.in (c-simplify.o): Add dependency on $(C_PRETTY_PRINT_H).

2003-08-20  Roger Sayle  <roger@eyesopen.com>

	* c-common.h (enum c_tree_index): Delete CTI_SIGNED_SIZE_TYPE.
	(signed_size_type_node): No longer a member of c_global_trees.
	* tree.h (enum tree_index): New member TI_SIGNED_SIZE_TYPE here.
	(signed_size_type_node): Moved, now a member of global_trees.

2003-08-20  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa-dom.c (optimize_block): Thread jump into empty
	block correctly.

	* tree-cfg.c (linearize_cond_expr): Don't merge blocks if the
	later has other predecessors.

2003-08-19  Jason Merrill  <jason@redhat.com>

	* c-typeck.c (build_array_ref): Also build ARRAY_REFs from
	INDIRECT_REFs of ARRAY_TYPE.

	* tree-ssa.c (tree_ssa_useless_type_conversion): Also strip
	conversions between pointer and reference types.

	* tree-dfa.c (get_stmt_operands): Just mark non-GIMPLE statements
	as unmodified.
	(find_referenced_vars): So we don't need to mark them here.

	* tree-inline.c (inline_data): Add retvar field.
	(declare_return_variable): Set it.
	(remap_decls): Use it.
	(expand_call_inline): Tweak.

2003-08-19  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* cfg.c (dump_edge_info): Add name for EDGE_LOOP_EXIT flag.

2003-08-19  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-flow.h (struct var_ann_d): New field scope.
	(struct stmt_ann_d): New field scope.
	(propagate_copy): Declaration changed.
	(fixup_var_scope): Declare.
	* tree-cfg.c (make_blocks, make_cond_expr_blocks,
	make_catch_expr_blocks, make_eh_filter_expr_blocks,
	make_try_expr_blocks, make_loop_expr_blocks, make_switch_expr_blocks,
	make_bind_expr_blocks, build_tree_cfg): Assign variables and statements
	to scopes.
	(assign_vars_to_scope): New.
	* tree-ssa-copyprop.c (move_var_to_scope): New.
	(copyprop_stmt): Pass scope of statement to propagate_copy.
	(propagate_copy): Assign variable to the right bind_expr.
	(fixup_var_scope): New.
	* tree-ssa-dom.c (optimize_stmt): Pass scope of statement to
	propagate_copy.

2003-08-19  Daniel Berlin <dberlin@dberlin.org>

	* tree-cfg (bsi_move_after): New function.
	(bsi_move_before): New function.
	(bsi_move_to_bb_end): New function.
	* tree-flow.h: Prototype new functions.

2003-08-18  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-ander.c: Remove doxygen markers.
	(eq_to_var): remove.
	(simple_cmp): Add.
	(throwaway_global): Add.
	(andersen_same_points_to_set): Handle ignoring global var aliasing the
	right way here.
	(andersen_may_alias): Use list_member to avoid stupid hack.
	* tree-alias-common.c: Remove hacks for disabling global var aliasing.

2003-08-17  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree.c (resize_phi_node): Initialize new entries.

2003-08-17  Jeff Law  <law@redhat.com>

	* tree-pretty-print.c (last_bb): Actually record the basic block,
	not just its index.
	(maybe_init_pretty_print): Corresponding changes.
	(dump_generic_node, dump_vops): Test the actual block pointers, not
	their indices.

	* tree-ssa-dom.c (optimize_block): Use equivalences from the
	dominator tree walk to thread through conditional jumps at leafs in
	the dominator tree.

	* tree-cfg.c (blocks_unreachable_p, remove_blocks): Use a bitmap
	rather than a varray.
	(REMOVE_ALL_STMTS, REMOVE_NO_STMTS): New defines for remove_bb.
	(REMOVE_NON_CONTROL_STMTS, REMOVE_CONTROL_STMTS): Likewise.
	(remove_unreachable_block): Use find_contained_blocks rather
	than find_subblocks.  If we have a COND_EXPR or SWITCH_EXPR which
	is unreachable, but which has reachable children clear out the
	condition and request all non-control statements be removed
	from the block.
	(remove_bb): Allow better control over what (if any) statements
	are removed.  All callers updated.
	(find_subblocks): Remove.
	(find_contained_blocks): Handle statements with no associated
	basic block.

2003-08-15  Andrew Pinski <pinskia@physics.uc.edu>

	* objc/objc-lang.c (LANG_HOOKS_GIMPLIFY_EXPR): Define
	as the c gimplifier.

2003-08-15  Jeff Law  <law@redhat.com>

	* tree-cfg.c (cleanup_tree_cfg): Wipe out the dominator tree
	if the number of basic blocks changes as a result of cfg cleanups.
	* tree-flow.h (build_dominator_tree): Prototype.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Build the dominator
	tree if it is not already available.
	* tree-ssa.c (build_dominator_tree): New function.
	(rewrite_into_ssa): Use it.

	* gimplify.c (gimplify_expr, cases NOP_EXPR, CONVERT_EXPR): If a
	COMPONENT_REF is wrapped with a NOP_EXPR, then force the type of
	the COMPONENT_REF to match the accessed field.  Strip away
	unnecessary type conversions and handle the case where all type
	conversions were removed.
	(case ARRAY_REF, COMPONENT_REF): Indicate to gimplify_array_ref
	and gimplify_component_ref if we want an lvalue or not.
	(gimplify_array_ref, gimplify_component_ref): Pass new argument
	WANT_LVALUE through to gimplify_compound_lval.
	(gimplify_compound_lval): If we do not want an lvalue and the
	toplevel COMPONENT_REF's type does not match its field's type,
	then wrap the COMPONENT_REF in a NOP_EXPR and force the
	COMPONENT_REF's type to match its field's type.
	(gimplify_modify_expr): If the RHS is a CALL_EXPR and the LHS
	is not a gimple temporary, then force the RHS through a gimple
	temporary, even if the call can not throw.
	(create_tmp_var): Make sure not to lose the type's attributes
	for the new variable.
	* tree-ssa.c (tree_ssa_useless_type_conversion): New function.
	* tree-flow.h (tree_ssa_useless_type_conversion): Prototype.
	* tree-ssa-dom.c (optimize_stmt): Use tree_ssa_useless_type_conversion.

	* tree-cfg.c (remove_useless_stmts_and_vars): Catch more
	useless statements created during the out-of-ssa pass.

2003-08-14  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_block): Record equivalences created by
	SWITCH_EXPRs.

	* tree-ssa-dom.c (optimize_stmt): Allow optimizing the RHS of
	a RETURN_EXPR which contains an optimizable MODIFY_EXPR.
	(lookup_avail_expr): Corresponding changes.
	(avail_expr_hash, avail_expr_eq): Likewise.

	* tree-ssa-dom.c (optimize_stmt): Fix typo which prevented
	stores with more than one VDEF from creating useful equivalences.

	* tree-dfa.c (get_expr_operands): Do not special case *0;

	* fold-const.c (fold, case INDIRECT_REF): Revert last change.

2003-08-14  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (bsi_insert_on_edge_immediate): Only update the
	container for the head tree of the next block if the new statement
	needs to be linked to it.

2003-08-13  Jeff Law  <law@redhat.com>

	* fold-const.c (fold, case INDIRECT_REF): Optimize reads from
	constant strings.

	* tree-cfg.c (remove_useless_stmts_and_vars): For a COND_EXPR
	where the condition is a variable and the ELSE clause merely
	sets that variable to zero, remove the ELSE clause.

	* tree-ssa-dom.c (optimize_stmt): Do not check the type of the
	value returned by lookup_avail_expr.

2003-08-13  Daniel Berlin  <dberlin@dberlin.org>

	* tree-cfg.c (remove_stmt):  Add new argument saying whether to remove
	annotations and invalidate defs.  Update all callers
	(remove_bsi_from_block): Moved from bsi_remove, argument added.
	(bsi_remove): Made into wrapper for remove_bsi_from_block.

2003-08-13  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* tree-ssa-dom.c (optimize_stmt): Call get_stmt_operands.

2003-08-12  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_stmt): Record equivalences created
	by memory stores.

2003-08-12  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (find_insert_location): Handle other control
	statements that may be at the end of the block.

2003-08-12  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* Makefile.in (tree-pretty-print.o): Add tree-iterator.h dependency.
	* tree-pretty-print.c: Include tree-iterator.h.
	(dump_generic_node): Avoid recursing into COMPOUND_EXPRs.

2003-08-12  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_stmt): Optimize ABS_EXPR when we know
	the sign of the source operand.

	* tree-ssa-dom.c (optimize_stmt): Rewrite TRUNC_DIV_EXPR and
	TRUNC_MOD_EXPR even if the LHS is not an SSA variable.  Do not
	enter the new expression in the hash tables if !may_optimize_p.
	Also try GE_EXPR to see if this transformation is safe.

	* tree-ssa-dom.c (optimize_stmt): Fix typo in last change which
	prevented recording equivalences created by IOR_EXPR.

	* tree-ssa-dom.c (optimize_stmt): Record that the destination of
	a MODIFY_EXPR nonzero if the RHS contains an IOR with a nonzero
	constant.  Turn DIV/MOD by a power of 2 into SHIFT/AND if we know
	dividend is positive.

2003-08-11  Jeff Law  <law@redhat.com>

	* fold-const.c (fold, cases NE_EXPR and EQ_EXPR): Fold equality
	comparisons of non-weak symbol addresses against zero.

	* tree-ssa-ccp.c (fold_stmt): Strip unnecessary NOP_EXPRs from
	the folded result.

	* gimplify.c (gimplify_expr, case INDIRECT_REF): Copy the base
	object into a temporary if it's in static memory or is addressable.

2003-08-11  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-alias-common.h (struct tree_alias_ops): Add a semicolon, fix
	bootstrap.

2003-08-10  Daniel Berlin  <dberlin@dberlin.org>

	* tree-dfa.c (compute_may_aliases): Move points-to initialization from
	here.
	(find_referenced_vars): To here.
	(get_memory_tag_for): Use new same_points_to_set function.

	* tree-alias-common.h (struct tree_alias_ops): Remove doxygen markers.
	Add same_points_to_set function to struct.
	(same_points_to_set): New function.

	* tree-alias-common.c (we_created_global_var): A bit of magic to ignore
	global var aliasing when we didn't create global var.  This will go
	away soon
	(same_points_to_set): New function.

	* tree-alias-andersen.c (struct andersen_alias_ops): Add
	andersen_same_points_to_set.
	(andersen_same_points_to_set): New function. Return true if the two
	variables have the same points-to set.

	* opts.c (common_handle_option): Add "none" as a points-to option.

2003-08-10  Paul Brook  <paul@nowt.org>

	* doc/install.texi: Mention --enable-languages=f95.

2003-08-09  Daniel Berlin  <dberlin@dberlin.org>

	* tree-pretty-print.c (dump_vops): check bb->tree_annotations, not
	bb->aux.

2003-08-08  Daniel Berlin  <dberlin@dberlin.org>

	* tree-cfg.c (bsi_insert_on_edge_immediate): If there's only
	one statement in the block, and it's an empty statement, replace it.

2003-08-08  Jason Merrill  <jason@redhat.com>

	* c-decl.c (c_expand_body_1): Restore support for
	!keep_function_tree_in_gimple_form.
	(finish_function, c_expand_deferred_function): Do TDI_inlined dump.

	* gimplify.c (voidify_wrapper_expr): Set TREE_SIDE_EFFECTS on the
	wrapper if we insert a MODIFY_EXPR.

2003-08-07  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (GTFILES): Add tree-ssa.c, tree-dfa.c and
	tree-ssa-ccp.c.
	(gt-tree-ssa.h, gt-tree-dfa.h, gt-tree-ssa-ccp.h): Depend on
	s-gtype.
	* tree-dfa.c (struct clobber_data_d): Remove.  Update all users.
	(struct alias_map_d): Mark for garbage collection.
	(struct walk_state): Add fields 'is_not_gimple' and
	'is_va_arg_expr'.
	(clobber_vars_r): Remove.  Update all users.
	(get_stmt_operands): Abort if attempting to get operands from a
	non-GIMPLE statement.
	(get_expr_operands): Likewise.
	Do not force a virtual operand when scanning VA_ARG_EXPR.
	(add_stmt_operand): If the variable has hidden uses, mark the
	statement as having volatile operands and return.
	If the variable occurs inside a VA_ARG_EXPR, add it as a virtual
	operand.
	(add_immediate_use): Call VARRAY_TREE_INIT instead of
	VARRAY_GENERIC_PTR_INIT.
	(dump_variable): Check is_in_va_arg_expr flag.
	(compute_may_aliases): Move code to find variables ...
	(find_referenced_vars): ... here.
	(find_vars_r): Abort if we find a non-GIMPLE expression
	unexpectedly.
	Mark variables found inside a VA_ARG_EXPR.
	Do not scan arguments for non-GIMPLE CALL_EXPRs.
	Remove local variable saved_is_store.
	Reformat some code for readability.
	(add_referenced_var): If the variable is already marked as having
	hidden uses, ignore it.
	If the variable is found inside a non-GIMPLE expression, mark it.
	If the variable is found inside a VA_ARG_EXPR, mark it.

	* tree-flow.h (struct var_ann_d): Add field is_in_va_arg_expr.
	(find_referenced_vars): Declare.
	* tree-optimize.c (optimize_function_tree): Call
	find_referenced_vars before computing may aliases.

	* tree-ssa-dce.c (need_to_preserve_store): Do not check if the
	variable has hidden uses.
	* tree-ssa-live.c (type_var_init): Likewise.

	* tree-ssa-ccp.c (ssa_edges): Mark for garbage collection.
	(tree_ssa_ccp): Use VARRAY_.*_EDGE calls to manipulate the varray
	of CFG edges.
	(add_control_edge): Likewise.
	(initialize): Likewise.
	* tree-ssa.c (struct def_blocks_d): Mark for garbage collection.
	(struct var_value_d): Likewise.
	(def_blocks_free): Remove.  Update all users.
	(rewrite_into_ssa): Do not specify free function when creating
	def_blocks and currdefs.
	Call sbitmap_free instead of free.
	(mark_def_sites): Call sbitmap_free instead of free.
	(set_def_block): Use GC allocation.
	(set_livein_block): Likewise.
	(insert_phi_nodes): Adjust name of varray def_maps when creating it.
	(insert_phis_for_deferred_variables): Remove call to BITMAP_XFREE.
	(insert_phi_nodes_for): Use GC allocation for phi_insertion_points.
	(init_tree_ssa): Remove typecast in call to memset.
	(set_value_for): Use GC allocation.
	(get_def_blocks_for): Remove typecast in call to htab_find.
	* varray.c (element): Add entry for struct edge_def *.
	* varray.h (enum varray_data_enum): Add VARRAY_DATA_EDGE.
	(union varray_data_tag): Add field of type struct edge_def *.
	(VARRAY_EDGE_INIT): Define.
	(VARRAY_EDGE): Define.
	(VARRAY_PUSH_EDGE): Define.
	(VARRAY_TOP_EDGE): Define.

2003-08-06  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (handle_switch_fallthru): Do not abort when the last
	statement of the case block needs to be the last statement of the
	block.
	(find_insert_location): Fix typo.

2003-08-06  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-dfa.c (remove_phi_arg):  When the PHI no longer has
	arguments, don't remove it here, but do so...
	(remove_phi_arg_num): ...from here.

2003-08-05  Jason Merrill  <jason@redhat.com>

	* gimplify.c (gimplify_cond_expr): Gimplify shortcut expansion in
	a conditional context.

	* tree-cfg.c (make_catch_expr_blocks): Don't change next_block_link.
	(make_eh_filter_expr_blocks): Likewise.

	* tree-dfa.c (add_referenced_var): Static locals are call
	clobbered.

2003-08-05  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-dfa.c (add_phi_arg): Allow PHI capacity to grow.
	* tree-flow.h  (add_phi_arg): Adjust prototype.
	* tree-ssa-pre.c (code_motion): Adjust call.
	* tree-ssa.c (rewrite_block): Likewise.
	* tree.c (resize_phi_node): New function.
	* tree.h (resize_phi_node): Add prototype.

2003-08-05  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_block): Be more aggressive about
	creating equivalences from PHI nodes.

	* tree-ssa-dom.c (optimize_stmt): Strip away certain NOP_EXPRs
	before determining if we have an equivalence to enter into
	the const_and_copies table.

	* tree-ssa-dce.c (remove_dead_stmts): Iterate backwards through the
	basic blocks removing dead statements.  Within each block iterate
	backwards through the statements removing those which are dead.

	* tree-ssa-optimize.c (optimize_function_tree): Call
	remove_useless_stmts_and_vars before building the flow graph.
	* tree-cfg.c (remove_useless_stmts_and_vars): Rename argument from
	first_iteration to remove_unused_vars.

	* tree-cfg.c (remove_unreachable_blocks): Remove blocks in reverse
	order.
	(remove_bb): Remove unwanted call to bsi_next.
	(bsi_remove): Refine code which removes useless COMPOUND_EXPRs to allow
	removal if one of the arms is not associated with a basic block.
	(remove_stmt): Improve check for testing when a basic block head/end
	pointer needs to be updated when removing a COMPOUND_EXPR.

	* tree-cfg.c (phi_alternatives_equal): New function.
	(linearize_cond_expr): Allow linearization if the PHI nodes at the
	target have equivalent arguments for the incoming edges from the THEN
	and ELSE clauses.

	* tree-ssa-dce.c (mark_tree_necessary): Empty statements may be
	necessary.
	(process_worklist): Handle any incoming abnormal edges the first
	time a statement in each block becomes executable.

	* tree-ssa-ccp.c (substitute_and_fold): Substitute known
	constants into PHI nodes.

2003-08-04  Sebastian Pop  <s.pop@laposte.net>

	* basic-block.h: Declare bb_ann_d.
	(basic_block_def): Add a field tree_annotations.
	* cfg.c (entry_exit_blocks): Initialize tree_annotations to NULL.
	* cfghooks.c: Remove the definition of cfg_level.
	(rtl_register_cfg_hooks): Remove the initiallization of cfg_level.
	* cfghooks.h (cfg_hooks): Add cfgh_loop_optimizer_init, and
	cfgh_loop_optimizer_finalize.
	(loop_optimizer_init, loop_optimizer_finalize): New macros.
	(cfg_level): Remove.
	* cfgloop.h (loop_optimizer_init, loop_optimizer_finalize): Rename
	to rtl_loop_optimizer_init and rtl_loop_optimizer_finalize.
	* cfgrtl.c (rtl_loop_optimizer_init, rtl_loop_optimizer_finalize):
	Declare, and register them in rtl_cfg_hooks and cfg_layout_rtl_cfg_hook.
	* loop-init.c (loop_optimizer_init, loop_optimizer_finalize): Rename
	to rtl_loop_optimizer_init and rtl_loop_optimizer_finalize.  Remove
	the checks to cfg_level.
	* tree-cfg.c (block_tree_ann_obstack, first_block_tree_ann_obj): New.
	(create_blocks_annotations, create_block_annotation,
	free_blocks_annotations, clear_blocks_annotations): New functions.
	(tree_loop_optimizer_init, tree_loop_optimizer_finalize): New
	functions.  Register them in tree_cfg_hooks.
	(build_tree_cfg, dump_tree_bb, delete_tree_cfg, tree_split_edge): Use
	create_blocks_annotations instead of alloc_aux_for_blocks,
	create_block_annotation instead of alloc_aux_for_block,
	.tree_annotations instead of .aux,
	free_blocks_annotations instead of free_aux_for_blocks.
	(tree_register_cfg_hooks): Remove initialization of cfg_level.
	* tree-flow-inline.h (bb_ann): Use .tree_annotations.
	* tree-flow.h: Update comment.

2003-08-04  Zdenek Dvorak  <rakdver@atrey.karlin.mff.cuni.cz>

	* Makefile.in (c-pretty-print.o): Add TREE_H and C_TREE_H dependencies.

2003-08-01  Paul Brook  <paul@nowt.org>

	* Makefile.in (GMPINC): Set and use.
	(GMPLIBS): Set it.
	* configure.in: Add test and switches for the GMP library.
	(all_need_gmp): Set from config-lang.in.
	* sourcebuild.texi: Document need_gmp.
	* configure: regen

2003-08-01  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-inline.c (expand_calls_inline): Fix comments.

2003-07-31  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (tree-ssa-ccp.o): Depend on $(EXPR_H).
	* builtins.c (c_strlen): Remove static declaration.
	(simplify_builtin_fputs): Remove static declaration.
	(simplify_builtin_sprintf): New local function.
	(expand_builtin_sprintf): Remove by surrounding with #if 0.
	(expand_builtin): Add BUILT_IN_SPRINTF to the list of built-ins
	handed over to simplify_builtin.
	(validate_arglist): Do not allow arguments with TREE_SIDE_EFFECTS.
	(simplify_builtin_fputs): Add new argument KNOWN_LEN.  If it's set,
	use it instead of trying to compute the length of the string.
	Update all callers.
	* expr.h (simplify_builtin_fputs): Declare.
	* tree-flow.h (fold_stmt): Change argument type to tree *.  Update
	all users.
	* tree-ssa-ccp.c: Include expr.h.
	(replace_uses_in): If the statement makes a call to some selected
	built-ins, mark it for folding.
	(get_strlen): New local function.
	(ccp_fold_builtin): New local function.
	(fold_stmt): Call it.
	(set_rhs): Fix if-else-if chaining.  Handle cases where the whole
	statement needs to be replaced.
	* tree.h (c_strlen): Declare.

2003-07-31  Diego Novillo  <dnovillo@redhat.com>

	Fix PR optimization/11373
	* tree-ssa-dce.c (stmt_useful_p): Get statement operands before
	checking for volatile operands.
	* tree-dfa.c (get_expr_operands): If a constant is dereferenced as a
	pointer, mark the statement as having volatile operands.
	(may_access_global_mem_p): If a non-NULL constant is used as a
	pointer, consider it as pointing to global memory.
	* tree-ssa-dom.c (optimize_stmt): Set addr_expr_propagated_p when
	propagating pointers that are integer constants.

2003-07-31  Andrew MacLeod  <amacleod@redhat.com>

	* tree-dfa.c (add_stmt_operand): Don't treat complex types as scalars.
	* tree-ssa-live.c (var_union):  Change comment.
	(coalesce_tpa_members): Don't proceed if var_union fails.
	* tree-ssa.c (insert_copy_on_edge): Change comment.
	(coalesce_abnormal_edges): Handle var_union failing.
	(coalesce_vars): Skip constant PHI arguments.

2003-07-30  Jeff Law  <law@redhat.com>

	* tree-cfg.c (bsi_remove): Don't remove a COMPOUND_EXPR with empty
	arms if the arms are in different basic blocks.

	* tree-ssa-dom.c (record_cond_is_false): New function.
	(record_cond_is_true): Similarly.
	(get_eq_expr_value): Use record_cond_expr_is_{true,false}.
	(optimize_stmt): Fix minor formatting issue.  If we encounter an
	INDIRECT_REF, record that the dereferenced pointer can not be
	null.

2003-07-30  Daniel Berlin  <dberlin@dberlin.org>

	* tree-dump.c (dump_option_value_in): "all" is now everything but
	TDF_RAW and TDF_SLIM.

2003-07-30  Diego Novillo  <dnovillo@redhat.com>

	* tree-simple.c (is_gimple_const): Accept CONST + CONST expressions
	as GIMPLE constants.

2003-07-30  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c: #include real.h
	(defs_match_p): Change arguments to something normal now that we use
	the new renaming algorithm. Update all callers.
	Use defs_hash_expr.
	(defs_y_dom_x): Ditto.
	(defs_hash_expr): New. Based on iterative_hash_expr.
	(generate_exr_as_of_bb): If there aren't any uses, return.
	(subst_phis): Call modify_stmt on the actually modified statement. :)
	(get_default_def): Only walk SSA_NAME arguments in PHI's.

2003-07-30  Jason Merrill  <jason@redhat.com>

	Don't modify code that is already GIMPLE.
	* gimplify.c (gimplify_expr): Don't return early if the predicate
	matches.
	Use a variable temp if the caller wants an lvalue.
	Don't call gimplify_constructor if we're on the rhs of a MODIFY_EXPR.
	(add_tree, add_stmt_to_compound): Do add an empty stmt if we
	previously had nothing at all.
	(gimplify_return_expr): Don't mess with iterators if it was already
	gimple.
	(gimplify_cond_expr): Remove a COND_EXPR with two empty arms.
	(gimplify_call_expr): Try to simplify a builtin again after
	gimplifying the args.
	(internal_get_tmp_var): Gimplify the new MODIFY_EXPR.
	(gimplify_expr, gimple_push_cleanup): Use boolean_false_node.
	(gimplify_init_constructor): New fn, broken out from...
	(gimplify_modify_expr): ...here.  Be smarter about zero-initialization.
	* tree-simple.c (is_gimple_rhs): Accept any CONSTRUCTOR.
	* tree-simple.h: Adjust add_tree prototype.

2003-07-29  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c (create_alias_vars):  If we created global_var,
	delete it when we are done.
	(ptr_may_alias_var): Handle case that global_var is now NULL_TREE.

2003-07-29  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_stmt): Propagate copies into VUSEs and
	the RHS of VDEFs.

2003-07-29  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa.c (insert_copy_on_edge): Only set used bit on DECL nodes.

2003-07-29  Andrew MacLeod  <amacleod@redhat.com>

	* common.opt (ftree-combine-temps): Add new option.
	* flags.h (flag_tree_combine_temps): New flag.
	* opts.c (decode_options): Initialize flag_tree_combine_temps.
	(common_handle_option): Handle new flag.
	* toplev.c (flag_tree_combine_temps): Declare.
	(lang_independent_options f): Add tree-combine-temp.
	* tree-ssa-live.c (var_union): When combining 2 root variables, choose
	the user variable over a temporary as the new variable.
	(compact_var_map): Use renamed root_var routines.
	(calculate_live_on_exit): Reformatting.
	(tpa_init): Initialize a tpa object.
	(tpa_remove_partition): Remove a partition from a tpa list.
	(tpa_delete): Delete a tpa object.
	(tpa_compact): Hide single elemenet lists.
	(root_var_init): Split common part into tpa_init and rename.
	(remove_root_var_partition, delete_root_va, dump_root_var): Delete.
	(type_var_init): New. Initialize a type_var object.
	(create_coalesce_list): New. Create a coalesce_list object.
	(delete_coalesce_list): New. Free a coalesce list's memory.
	(find_partition_pair): New. Find a coalesce pair in a coalesce list.
	(add_coalesce): New. Add a coalesce between 2 partitions.
	(sort_coalesce_list): New. Sort coalesce pairs by importance.
	(pop_best_coalesce): New. Get best remaining pair to coalesce.
	(add_conflicts_if_valid): Move from tree-ssa.c.
	(build_tree_conflict_graph): Move from coalesce_ssa_name in tree-ssa.c.
	Genericize to use tpa_p instead of root_var object. Don't add
	interferences between copies. Update coalesce list.
	(coalesce_tpa_members): Move from coalesce_ssa_name in tree-ssa.c. Use
	tpa_p instead of root_var. Use coalesce list if provided.
	(dump_coalesce_list): New. Show debug info for a coalesce list.
	(tpa_dump): Rename from dump_root_var and genericize to use tpa_p.
	* tree-ssa-live.h (root_var_p): Rename structure type to tpa_p
	(tpa_num_trees, tpa_tree, tpa_first_partition, tpa_next_partition,
	tpa_find_tree): New. Generic versions of existing root_var routines.
	(tpa_decompact): New. Include single version lists.
	(root_var_p): Declare as type tpa_p.
	(root_var_num, root_var, root_var_first_partition,
	root_var_next_partition, root_var_dump, root_var_delete,
	root_var_remove_partition, root_var_find , root_var_compac,
	root_var_decompac): Rename and call generic versions.
	(type_var_p): New. Use tpa_p structure for a type based association.
	(type_var_num, type_var, type_var_first_partition,
	type_var_next_partition, type_var_dump, type_var_delete,
	type_var_remove_partition, type_var_find, type_var_compact,
	type_var_decompact): New. Call generic versions of the routine.
	(struct partition_pair_d): New. Represent a desired coalesce.
	(struct coalesce_list_d): New. Organize lists of desired coalesces.
	(NO_BEST_COALESCE): Define value.
	* tree-ssa.c (set_if_valid): Remove.
	(insert_copy_on_edge): Set variable as used when inserting a copy.
	(add_conflicts_if_valid): Remove. Move to tree-ssa-live.c.
	(print_exprs): New. Routine for commonly used output format.
	(coalesce_abnormal_edges): New. Split from coalece_ssa_name. Force
	partition coalesces across abnormal edges.
	(coalesce_ssa_name): Split out build_tree_conflict_graph,
	coalesce_abnormal_edges, and coalesce_tpa_members. Return live
	range info if required. Use renamed root_var routines.
	(assign_vars): Use renamed root_var routines.
	(replace_variable): Mark as inline.
	(coalesce_vars): Coalesce variable memory storage.
	(rewrite_out_of_ssa): Don't compact varmap anymore. Free live range
	info if required. Call coalesce_vars if combining temps.

2003-07-29  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (handle_switch_fallthru): Use bsi_link_after if stmt is
	in a basic block.

2003-07-28  Diego Novillo  <dnovillo@redhat.com>

	* opts.c (decode_options): Disable must-alias optimization.

2003-07-28  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa.c (struct _elim_graph): Add varray for constant copies.
	(new_elim_graph): Initialize constant copy array..
	(eliminate_build): Push constant copies onto stack instead of emitting.
	(eliminate_phi): Emit any pending constant copies.

2003-07-28  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_block): If a PHI has a single argument
	that is a constant, then that creates a useful equivalence.
	Propagate constant values into PHI nodes.

	* tree-flow-inline.h (may_propagate_copy): Allow RHS to be a
	constant.

	* tree-dfa.c (compute_immediate_uses_for): Do not assume that
	PHI arguments are SSA_NAMEs.
	* tree-ssa-dce.c (process_worklist): Likewise.
	* tree-ssa-copyprop.c (copyprop_phi): Likewise.  Use may_propagate_copy.
	* tree-ssa-ccp.c (visit_phi_node): Do not assume that PHI arguments
	are SSA_NAMEs.  Create a suitable value if a PHI argument is a
	constant.

	* tree-cfg.c (move_outgoing_edges): Correctly handle case where
	an edge already exists from BB1 to BB2's successor.

2003-07-27  Daniel Berlin  <dberlin@dberlin.org>

	* tree.h (EREF_TEMP): Rename to EPHI_TEMP.
	(tree_eref_common): Move temp to tree_ephi_node.
	* tree-ssa-pre.c: Remove #if 0'd code.
	Use EPHI_TEMP rather than EREF_TEMP, remove EREF_TEMP on EUSE nodes.
    (finalize_1): Handle empty blocks properly.

2003-07-27  Andreas Jaeger  <aj@suse.de>

	* tree.c: Convert remaining K&R prototypes to ISO C90.
	* tree-dump.c: Likewise.
	* tree-inline.c: Likewise.
	* stmt.c (expand_asm_expr): Likewise.

	* diagnostic.h: Remove PARAMS.

2003-07-26  Paul Brook  <paul@nowt.org>

	* Makefile.in: Rename check-g95 to check-gfortran.
	* gcc.c (default_compilers): Add entries for .f90 and .f95.
	* doc/frontends.texi: Document new F95 front end.
	* doc/install.texi: Ditto.
	* doc/invoke.texi: Ditto.
	* doc/sourcebuild.texi: Ditto.
	* fortran: New front end.

2003-07-25  Jeff law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_block): Use may_propagate_copy.

2003-07-25  Diego Novillo  <dnovillo@redhat.com>

	* opts.c (decode_options): Re-enable must-alias optimizations.

2003-07-25  Daniel Berlin  <dberlin@dberlin.org>

	* configure.in:  Update BANSHEEREBUILD for PWD change.
	* configure: regen

2003-07-25  Andreas Jaeger  <aj@suse.de>

	* c-call-graph.c: Convert to ISO C90.
	* c-common.c: Likewise.
	* c-mudflap.c: Likewise.
	* c-pretty-print.c: Likewise.
	* cfganal.c (find_edge): Likewise.
	* dependence.c: Likewise.
	* diagnostic.c (debug_output_buffer): Likewise.
	* except.c (expand_eh_handler): Likewise.
	* fold-const.c: Likewise.
	* langhooks.c: Likewise.
	* tree-cfg.c (last_exec_block): Likewise.
	* tree-ssa-pre.c: Likewise.
	* builtins.c: Likewise.

	* tree.h: Remove remaining PARAMS.
	* c-common.h: Likewise.
	* c-pretty-print.h: Likewise
	* c-tree.h: Likewise.
	* except.h: Likewise.
	* langhooks-def.h: Likewise.
	* langhooks.h: Likewise.

2003-07-24  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (cleanup_operand_arrays): New local function.  Remove
	superfluous VUSE operands.
	(get_stmt_operands): Call it.

2003-07-24  Jason Merrill  <jason@redhat.com>

	* gimplify.c (gimple_boolify): New fn.
	(gimplify_expr) <TRUTH_NOT_EXPR>: Boolify arg.
	(gimplify_cond_expr): Boolify condition.
	(gimplify_boolean_expr): Boolify args.
	(gimple_push_cleanup): Make flag boolean.

	* tree-simple.c (is_gimple_relop): TRUTH_{AND,OR,XOR}_EXPR
	are not comparisons.
	(is_gimple_binary_expr): They are binary ops.

	* tree-mudflap.c (mf_build_check_statement_for): Use TRUTH_OR_EXPR
	rather than BIT_IOR_EXPR.

2003-07-23  Jason Merrill  <jason@redhat.com>
	    Diego Novillo  <dnovillo@redhat.com>

	* c-common.h (DECL_C_HARD_REGISTER): Replace ...
	* tree.h (DECL_HARD_REGISTER): ... with this.  Update all users.

2003-07-23  Diego Novillo  <dnovillo@redhat.com>

	* tree-flow-inline.h (may_propagate_copy): New function.
	* tree-flow.h (may_propagate_copy): Declare.
	* tree-ssa-copyprop.c (copyprop_stmt): Call it.
	(get_original): Likewise.
	* tree-ssa-dom.c (optimize_stmt): Likewise.

2003-07-23  Frank Ch. Eigler  <fche@redhat.com>

	* gcc.c (MFWRAP_SPEC): Also wrap pthread_join and pthread_exit.

2003-07-23  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-flow-inline.h (remove_dom_child): New function.
	(clear_dom_children): New function.
	* tree-cfg.c (bsi_insert_on_edge_immediate): Do not clear
	the annotation for the new bb, it is already memset to zero
	in alloc_aux_for_block().
	(move_outgoing_edges): Use dom_children() instead of looking
	at the dom_children field in the basic block annotation.
	* tree-ssa.c (rewrite_into_ssa): Use clear_dom_children().

	* tree-cfg.c (dump_tree_cfg): Dump to `file', not `dump_file'.

2003-07-23  Diego Novillo  <dnovillo@redhat.com>

	* tree.h (DECL_ESTIMATED_INSNS): Move from c-common.h.

2003-07-23  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Make
	found_unreachable a bool.  Create/delete hash tables for
	copies and available exprs outside the main loop.  Use
	htab_clean to wipe them after each iteration.

2003-07-22  Diego Novillo  <dnovillo@redhat.com>

	* opts.c (decode_options): Add temporary test for environment
	variable TREE_SSA_DO_PRE.
	Do not disable dominator optimizations when PRE is enabled.

2003-07-22  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (finalize_1): Change to not use bsi_last.

2003-07-22  Daniel Berlin  <dberlin@dberlin.org>

	* tree-cfg.c (remove_stmt): Revert 07-15 change. Turns out the bug is in
	the reverse iterator.

2003-07-22  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-ccp.c (visit_phi_node): Assume default value of CONSTANT
	if the PHI value was already constant.

2003-07-22  Andrew MacLeod  <amacleod@redhat.com>

	* c-pretty-print.c (print_call_name): Handle COND_EXPR correctly.
	* tree-pretty-print.c (print_call_name): Handle COND_EXPR correctly and
	handle SSA_NAME.
	* tree-dfa.c (add_phi_arg, remove_phi_arg_num): Remove references to
	SSA_NAME_HAS_REAL_REFS.
	* tree-ssa-ccp.c (visit_phi_node): Remove SSA_NAME_HAS_REAL_REFS.
	* tree-ssa-copyprop.c (copyprop_phi): Remove SSA_NAME_HAS_REAL_REFS.
	* tree-ssa-live.c (register_ssa_partition): Register the PHI and it's
	arguments if this variable is defined by a PHI.
	(create_ssa_var_map): Only register real uses and defs, and virtual
	operands of ASM_EXPR's. Remove SSA_NAME_HAS_REAL_REFS. Don't set
	used flag on variables here.
	(calculate_live_on_entry): Ignore constants in PHI arguments.
	(calculate_live_on_exit): Ignore constants in PHI arguments.
	(dump_live_info): New. Dump live range information.
	* tree-ssa-live.h (dump_live_info): New prototype and flags.
	* tree-ssa-pre.c (create_expr_ref, finalize_1, repair_use_injury,
	code_motion): Remove SSA_NAME_HAS_REAL_REFS.
	* tree-ssa.c (rewrite_operand, register_new_def): Remove real_ref
	parameter and SSA_NAME_HAS_REAL_REFS.
	(rewrite_block): Remove real_ref parameter from register_new_def call.
	(eliminate_build): Remove SSA_NAME_HAS_REAL_REFS. Insert copy if PHI
	argument is a constant. Handle irregular PHI argument ordering.
	(elim_create): Remove dead code to count PHI nodes.
	(assign_vars): Set used flag on variables when assigned.
	(replace_variable): Eliminate dead code.
	(coalesce_ssa_name): Remove SSA_NAME_HAS_REAL_REFS. Print error for
	constant argument across an abnormal edge.
	(eliminate_extraneous_phis): New. Remove PHI nodes which are not in
	the partition.
	(rewrite_out_of_ssa): Call eliminate_extraneous_phis.
	(rewrite_stmt): Remove real_ref parameter from rewrite_operand and
	register_new_def.
	* tree.h (SSA_NAME_HAS_REAL_REFS): Remove.
	(struct tree_ssa_name): Remove 'has_real_refs' field.

2003-07-22  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (factor_through_injuries): Take new argument specifying
	whether use was injured or not (needed for SR).   Update all callers.
	(maybe_find_rhs_use_for_var): Take new argument specifying which
	operand to start search with.   Update all callers.
	(phi_opnd_from_res): #if 0 out.
	(rename_2): Ditto.
	(rename_1): Ditto.
	(defs_match_p): Take new arguments specifying which defs were injured.
	Update all callers.
	(defs_y_dom_x): Ditto.
	(generate_expr_as_of_bb): Fix small memory overwrite.
	(process_delayed_rename): Propagate injured flag around.
	(new_rename_1): Ditto.
	(finalize_1): Get correct variable names for newly created statement if
	necessary due to PHI.
	(repair_use_injury): Note the repair in the stats. Insert repair
	in right place.
	(repair_euse_injury): Fix handling of PHI_NODE.
	(code_motion): Fix algorithm so it can handle using reaching_def all the
	time (needed for SR).
	Use reaching_def rather than EREF_TEMP.

2003-07-21  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (get_stmt_operands): Remove FIXME note
	regarding virtual operands for ASM_EXPRs.

2003-07-21  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (add_def): Renamed from set_def.  Update all users.
	(get_stmt_operands): Don't force ASM_EXPR operands to be virtual.
	(add_stmt_operand): Allow non-assignments to create new defs.
	* tree-dump.c (dump_function): Move header dump...
	(dump_function_to_file): ... here.
	* tree-flow-inline.h (def_ops): Renamed from def_op.  Return a
	varray with all the definitions made by the statement.
	Update all users.
	* tree-flow.h (struct operands_d): Rename field 'def_op' to
	'def_ops'.  Convert it into a varray.
	* tree-must-alias.c (tree_compute_must_alias): Call
	dump_function_to_file instead of dump_function.
	* tree-ssa-ccp.c (tree_ssa_ccp): Likewise.
	(visit_stmt): Only visit statements that make new definitions using
	MODIFY_EXPR.
	Definitions coming from other statements are considered VARYING.
	* tree-ssa-copyprop.c (tree_ssa_copyprop): Call
	dump_function_to_file instead of dump_function.
	* tree-ssa-dce.c (tree_ssa_dce): Likewise.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Likewise.
	(optimize_stmt): Don't abort if a statement makes more than one
	definition.
	Check for MODIFY_EXPR statements directly, instead of relying on
	the presence of a single definition.
	* tree-ssa-pre.c (tree_perform_ssapre): Call dump_function_to_file
	instead of dump_function.
	* tree-ssa.c (rewrite_into_ssa): Likewise.
	Dump the function before dominator optimizations if TDF_DETAILS is
	set.
	(rewrite_stmt): Don't abort if the statement makes more than one
	definition.

2003-07-21  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (tree_ssa_dominator_optimize): If we made any
	blocks unreachable, repeat the dominator optimizations.
	(optimize_block): Enter PHIs with a single source argument into
	the const_and_copies table.  When propagating into a PHI node,
	break the loop over the PHI arguments when a propagation is performed.
	If the PHI agument is not an SSA_VAR, then no propagation is possible.
	(optimize_stmt): If an operand is not an SSA_VAR, then no propagation
	is possible/needed.

2003-07-21  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (tree-ssa-dom.o): Add dependency on $(TREE_DUMP_H).
	* fold-const.c (fold): Remove unusued local variable 'invert'.
	* tree-dump.c (dump_files): Add entry for -fdump-tree-dom.
	* tree-flow.h (tree_ssa_dominator_optimize): Change declaration to
	accept a function decl.
	* tree-ssa-dom.c: Include timevar.h and tree-dump.h.
	(tree_ssa_dominator_optimize): Change to receive the function decl
	for the function to optimize.  Update callers.
	Use own dump file instead of dumping on the .ssa dump file.
	Dump function at the end.
	Push and pop TV_TREE_SSA_DOMINATOR_OPTS.
	* tree-ssa.c (rewrite_into_ssa): Restore check for number of times
	that the rename loop has been executed.  Abort if the loop executes
	more than twice.
	* tree.h (enum tree_dump_index): Add TDI_dom.
	* doc/invoke.texi: Document -fdump-tree-dom.

2003-07-21  Steven Bosscher  <steven@gcc.gnu.org>
	    Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (install-po): Check if $CATALOGS is empty to avoid
	buggy shells.
	* basic-block.h (rtl_verify_flow_info): Remove.
	(tree_verify_flow_info): Remove.
	(verify_flow_info): Declare.
	* builtins.c: Rearrange to simplify merges.  Add #if 0 around
	expand_ functions that are not used in the branch and move new code
	to the end of the file.
	* c-opts.c (c_common_handle_option): Move handling of -fdump- to
	opts.c.
	* cfgloopmanip.c (loop_split_edge_with_NULL): Remove.  Update all
	users.
	* common.opt: Add all the tree-ssa switches.
	* opts.c: Handle them.
	* flags.h (flag_tree_cp): Remove unused variable.
	(enum pta_type): Move from tree-must-alias.h
	(flag_tree_points_to): Likewise.
	* toplev.c (flag_tree_cp): Remove unused variable.
	* tree-cfg.c: Move cfg_hooks structures and functions for
	trees from cfghooks.c.
	* tree-mudflap.c (mudflap_enqueue_decl): Don't use %D to
	avoid warning about format specifiers.

2003-07-21  Diego Novillo  <dnovillo@redhat.com>

	* gimplify.c (gimplify_function_tree): Move gimplification of the
	function body ...
	(gimplify_body): ... here.
	* tree-simple.h (gimplify_body): Declare.
	* tree-inline.c (initialize_inlined_parameters): If the
	emitted assignment is not in GIMPLE form, gimplify the
	body of assignments emitted.

2003-07-17  Jeff Law  <law@redhat.com>

	* tree-dfa.c (remove_phi_arg): Update PHI_ARG_CAPACITY.

	* tree-ssa.c (mark_def_sites): Do not build the dominator tree here.
	(rewrite_into_ssa): Do not depend on mark_def_sites to build the
	dominator tree.   Move computation of dominance frontiers out
	of main loop (even though it was only done once).  Free immediate
	dominator information as soon as we're done with it.

	* tree-flow.h (remove_phi_nodes_and_edges_for_unreachable_block):
	Prototype.
	* tree-cfg.c (remove_phi_nodes_and_edges_for_unreachable_block): New
	function extracted from remove_bb.
	(remove_bb): Call remove_phi_nodes_and_edges_for_unreachable_block.

	* tree-ssa-dom.c (optimize_block): Propagate values into PHI nodes.
	Do not optimize a block which has become unreachable.
	If a COND_EXPR has a compile-time constant condition, then remove
	outgoing from the COND_EXPR which can not execute.

2003-07-16  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mx_xfn_indirect_ref): Correct source locations
	for tracked expressions by ignoring incidental decl source loci.

2003-07-16  Jeff Law  <law@redhat.com>

	* tree-cfg.c (remove_bb): Remove statements in reverse order.
	Simplify code to issue warnings for unreachable code.

	* tree-ssa-dom.c (get_eq_expr_value): Also enter expressions
	into the available expression hash table.  Callers changed to
	pass in the block_avail_exprs varray and const_and_copies hash
	table.
	(optimize_stmt): Allow optimization of the condition in
	a COND_EXPR statement.
	(lookup_avail_expr): For COND_EXPRs, just see if their condition
	has been recorded into the hash table, do not enter them into
	the hash table.  Only do a lookup of the result in the
	const_and_copies table if it is an SSA_VAR.
	(avail_expr_hash): Handle COND_EXPRs, specifically we only care
	about their condition and virtual operands.
	(avail_expr_eq): Likewise.  If one statement has virtual operands
	and the other does not, then the expressions are not equal.

	* tree-ssa.c (rewrite_into_ssa): If we have done dominator
	optimizations, then call cleanup_tree_cfg after rewriting is
	complete.
	* tree-ssa-dom.c (optimize_block): Get eq_expr_value for the
	current block rather than having it passed in by the caller.
	Propagate eq_expr_value into the false arm of a COND_EXPR.
	(get_eq_expr_value): Return equivalences for the false
	arm of a COND_EXPR if requested.

2003-07-16  Daniel Berlin  <dberlin@dberlin.org>

	* c-decl.c (store_parm_decls): Also strip NON_LVALUE_EXPRs and
	CONVERT_EXPRs when setting DECL_NONLOCAL.

2003-07-15  Daniel Berlin  <dberlin@dberlin.org>

	* tree-cfg.c (remove_stmt): Update bb->end_tree_p properly when
	stmt_p is the end of the bb.

2003-07-15  Jeff Law  <law@redhat.com>

	* tree-ssa-dom.c (optimize_stmt): Consider two types equivalent if
	their TYPE_MAIN_VARIANT is equivalent.
	(avail_expr_eq): Likewise.

	* Makefile.in (OBJS): Add tree-ssa-dom.o
	(tree-ssa-dom.o): Add dependencies.
	(ssa.o, cfghooks.o): Use $(TREE_FLOW_H), not tree-flow.h.
	* timevar.def: Add new timevar for dominator optimizer.  Reorder
	slightly.
	* tree-dfa.c (add_stmt_operand): Do not consider references to
	static storage as volatile operands.
	(add_referenced_var): Static storage items reference global memory.
	* tree-ssa.c: Simplify by moving everything specific to the
	dominator optimizer into tree-ssa-dom.c.  Call into the dominator
	optimizer after rewriting all the basic blocks.
	* tree-ssa-dom.c: New file.  Mostly extracted from tree-ssa.c
	* tree-flow.h (tree_ssa_dominator_optimize): Prototype.
	(dump_dominator_optimization_stats): Likewise.
	(debug_dominator_optimization_stats): Likewise.

2003-07-15  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (add_stmt_operand): Move volatile handling...
	(find_vars_r): ... here.
	Mark when the walker is inside an ASM_EXPR.
	(struct walk_state): Add field 'is_asm_expr'.
	Change flag fields to bitfields.
	(add_referenced_var): If the variable is a pointer being stored by
	an ASM_EXPR, mark it as a global memory pointer.
	* tree-flow-inline.h (is_optimizable_addr_expr): New function.
	* tree-flow.h (is_optimizable_addr_expr): Declare it.
	* tree-ssa.c (rewrite_and_optimize_stmt): Use it.
	(lookup_avail_expr): Likewise.
	(get_eq_expr_value): Likewise.
	(avail_expr_eq): Return 'true' when comparing a statement against
	itself.
	* tree-ssa-dce.c (need_to_preserve_store): Move volatile checking...
	(stmt_useful_p): ...here.

2003-07-15  Andreas Jaeger  <aj@suse.de>

	* c-simplify.c: Convert prototypes to ISO C90.
	* gimplify.c: Likewise.
	* simple-break-elim.c: Likewise.
	* simple-goto-elim.c: Likewise.

	* tree-alias-ander.c: Convert prototypes to ISO C90.
	* tree-alias-common.c: Likewise.
	* tree-alias-type.c: Likewise.
	* tree-browser.c: Likewise.
	* tree-dchain.c: Likewise.
	* tree-mudflap.c: Likewise.
	* tree-nomudflap.c: Likewise.
	* tree-optimize.c: Likewise.
	* tree-pretty-print.c: Likewise.
	* tree-simple.c: Likewise.

	* tree-alias-common.h: Convert prototypes to ISO C90, remove extra
	whitespace.
	* tree-alias-type.h: Convert prototypes to ISO C90.
	* tree-dchain.h: Likewise.
	* tree-flow-inline.h: Likewise.
	* tree-flow.h: Likewise.
	* tree-iterator.h: Likewise.
	* tree-mudflap.h: Likewise.
	* tree-simple.h: Likewise.

2003-07-14  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (tree_perform_ssapre): Fix dom_children after DCE
	breaks them.

2003-07-14  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (add_vdef): Initialize variable 'vdef'.
	(add_vuse): Initialize variable 'vuse'.

2003-07-14  Diego Novillo  <dnovillo@redhat.com>

	Must alias analysis.  Allow the SSA rename pass to be done on a set
	of variables.

	* Makefile.in (OBJS): Add tree-must-alias.o.
	* flags.h (flag_tree_must_alias): Declare.
	* timevar.def (TV_TREE_MUST_ALIAS): Define.
	* toplev.c (flag_tree_must_alias): Declare.
	(f_options): Add entry for -ftree-must-alias.
	(parse_options_and_default_flags): Enable must-alias analysis at -O1.

	* tree-cfg.c (remove_useless_stmts_and_vars): Do not remove
	addressable variables.

	* tree-dfa.c (dump_file, dump_flags): New local variables to
	replace tree_ssa_dump_file and tree_ssa_dump_flags.  Update every
	user.
	(get_stmt_operands): Clear the array of virtual operands before
	scanning the statement.
	(get_expr_operands): Do not add an operand for ADDR_EXPR if the
	expression takes the address of a VAR_DECL or a PARM_DECL.  Instead
	add the variable to the list of variables whose address has been
	taken by the statement.
	Allow INDIRECT_REF expressions of the form *&VAR.  Convert them
	into an operand for VAR.
	When processing function calls, add a VUSE for .GLOBAL_VAR if the
	function is pure but not const.
	(add_stmt_operand): If the operand is an ADDR_EXPR, add the
	variable to the list of variables whose address has been taken by
	the statement.
	(add_vdef): If the statement had virtual definitions, try to find
	an existing VDEF for the variable, to preserve SSA information.  If
	none is found, create a new one.
	(add_vuse): Likewise.
	(remove_all_phi_nodes_for): New function.
	(get_call_flags): New function to replace call_may_clobber.  Update
	all callers.

	* tree-dump.c (dump_files): Add entry for -fdump-tree-mustalias.
	* tree-flow-inline.h (addresses_taken): New function.
	(is_unchanging_value): New function.

	* tree-flow.h (addresses_taken): Declare.
	(remove_all_phi_nodes): Declare.
	(init_tree_ssa): Declare.
	(propagate_copy): Declare.
	(is_unchanging_value): Declare.
	(tree_compute_must_alias): Declare.

	* tree-inline.c (copy_body_r): Fold instances of *&VAR.

	* tree-must-alias.c: New file.

	* tree-optimize.c (optimize_function_tree): Call init_tree_ssa and
	compute_may_aliases before calling rewrite_into_ssa.
	After the SSA pass, run dead code elimination and compute
	must-aliases.

	* tree-simple.c (is_gimple_call_expr): Add comment that
	is_gimple_* predicates should not have side effects.

	* tree-ssa-ccp.c: Replace calls to really_constant_p with
	is_unchanging_value everywhere.
	(fold_stmt): Don't fold if the RHS is already a constant.

	* tree-ssa-copyprop.c (copyprop_stmt): Remove unnecessary
	variable 'vuse'.
	Call propagate_copy to replace the operand with its new value.
	(copyprop_phi): Remove unnecessary variable 'vuse'.
	(get_original): Remove unused parameter 'vuse_p'.
	(propagate_copy): New function.

	* tree-ssa-dce.c (need_to_preserve_store): Update comments.

	* tree-ssa.c (dump_file, dump_flags): New local variables to
	replace globals tree_ssa_dump_file and tree_ssa_dump_flags.  Update
	all users.
	(addr_expr_propagated_p): New local variable.
	(vars_to_rename): New local variable.
	(check_for_new_variables): New local function.
	(rewrite_into_ssa): Add new argument VARS which is a bitmap
	representing all the variables that should be renamed into SSA.  If
	VARS is NULL, all the variables in the program are renamed.
	Don't call init_tree_ssa nor compute_may_aliases.
	Initialize all the local hash tables and bitmaps.
	Add support for repeating the SSA rename process more than once.
	If the dominator optimizations produced new symbols, repeat the
	process.
	(mark_def_sites): Ignore operands that are in SSA form already.
	(insert_phi_nodes): Only add PHI nodes for variables in the
	VARS_TO_RENAME bitmap.
	(rewrite_block): Ignore PHI nodes that have been renamed already.
	(rewrite_and_optimize_stmt): Ignore operands that are already in
	SSA form.
	When propagating ADDR_EXPR set addr_expr_propagated_p to 'true'.
	Call propagate_copy when doing copy propagation.
	Call is_unchanging_value to decide if the RHS of an assignment is a
	constant.
	(rewrite_stmt): Ignore operands that are already in SSA form.
	(init_tree_ssa): Make external.
	Move initialization of local hash tables and bitmaps to
	rewrite_into_ssa.
	(remove_annotations_r): Don't special case MODIFY_EXPR nodes.
	(lookup_avail_expr): Call is_unchanging_value.
	(get_eq_expr_value): Likewise.

	* tree.h (enum tree_dump_index): Add TDI_must_alias.

	* cp/optimize.c (optimize_function): Don't call the tree optimizers
	  if -fdisable-tree-ssa is given.

	* doc/invoke.texi: Add documentation for -ftree-must-alias.

2003-07-07  Jeff Law  <law@redhat.com>

	* fold-const.c (nondestructive_fold_unary_to_constant: For BIT_NOT_EXPR
	make sure OP0 is a suitable constant before trying to fold it.

	* tree-cfg.c (handle_switch_fallthru): Set DECL_CONTEXT for
	newly created labels.

	* tree-cfg.c (move_outgoing_edges): New function.
	(merge_tree_blocks): Use it.
	(remove_bb): Remove the block from the pdom_info structures
	as well if they exist.
	(linearize_cond_expr): Move important edges from the then and
	else arms to BB as appropriately

	* tree-cfg.c (remove_stmt): When removing a COMPOUND_EXPR, make
	sure that any basic block pointers to the arms of the COMPOUND_EXPR
	are updated.

	* tree-cfg.c (make_goto_expr_edges): Computed gotos create
	abnormal edges.

2003-07-05  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (defs_match_p): Check for copies of the same version.

2003-07-03  Frank Ch. Eigler  <fche@redhat.com>

	* tree-nomudflap.c (mf_marked_p, mf_mark): New dummy functions.

2003-07-03  Jeff Law  <law@redhat.com>

	* tree-ssa.c (lookup_avail_expr): Accept new argument containing the
	const_and_copies table.  All callers changed.  If we find the
	given expression in the availe expression hash table, then lookup
	the LHS of the hash table's entry in the const_and_copies_table.
	Do record type casts into the available expression table.

	* tree-nomudflap.c (mf_marked_p): Mark arguments as being unused.
	(mf_mark): Likewise.

	* c-decl.c (store_parm_decls): Strip away NOP_EXPRs when looking
	for hidden use variables.

2003-07-02  Frank Ch. Eigler  <fche@redhat.com>

	* varasm.c (build_constant_desc): Propagate mudflap marked-ness
	across constant copying.

2003-07-02  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (tree_perform_ssapre): Don't optimize things with
	volatile ops or making aliased loads right now.
	(create_expr_ref): Mark the phi result of the new phi as having
	real refs.
	(finalize_1): Mark the new temp as having real refs.
	(repair_use_injury): Ditto.
	(code_motion): Ditto.

2003-07-01  Daniel Berlin  <dberlin@dberlin.org>

	* tree.h (struct tree_eref_common): Add injured flag.
	Add EREF_INJURED macro.

2003-07-01  Daniel Berlin  <dberlin@dberlin.org>

	* tree-flow-inline.h (stmt_ann): We have stmt_ann on E*_NODE's as well,
	so use is_essa_node as well.
	* tree-dfa.c (create_stmt_ann): Ditto.
	* tree.h (is_essa_node): Declare.
	* tree.c (is_essa_node): Define.

2003-07-01  Jason Merrill  <jason@redhat.com>

	* tree-cfg.c (prepend_stmt_to_bb): New fn.
	(bsi_insert_after): Add to the beginning of an empty block.

2003-07-01  Jeff Law  <law@redhat.com>

	* expr.c (expand_expr, case COND_EXPR): Correctly (?) handle
	cases where a containing block has a stack level.  Handle
	cases where one arm is a GOTO_EXPR and the other arm has
	side effects.

	* stmt.c (containing_blocks_have_cleanups_or_stack_level): New
	function.
	(any_pending_cleanups): Further simplification.
	* tree.h (containing_blocks_have_cleanups_or_stack_level): Prototype.

2003-06-30  Diego Novillo  <dnovillo@redhat.com>

	* tree-flow.h (struct tree_ann_common_d): Remove 'stmt' field.
	Update all users.
	(struct var_ann_d): Remove field 'has_real_refs'.  Update all callers
	with calls to SSA_NAME_HAS_REAL_REFS.
	Remove field 'occurs_in_abnormal_phi'.  Update all callers with
	calls to SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
	* tree-flow-inline.h (var_ann): Only accept _DECL nodes.
	(stmt_ann): Only accept GIMPLE statements.
	(tree_stmt): Remove.  Update all users.

	* tree-cfg.c (linearize_cond_expr): Handle cases where BB doesn't
	have a postdominator.
	(find_contained_blocks): Do not look inside COND_EXPR_COND nor
	SWITCH_COND expressions.

	* tree-dfa.c (get_stmt_operands): Force virtual operands on
	ASM_EXPRs.
	(get_expr_operands): Handle SSA names when adding operands for
	memory tags.
	(add_stmt_operand): Handle SSA names.
	Move checks for volatile operands earlier in the code.
	(add_vdef): Re-format for readability.
	(create_var_ann): Only allow _DECL nodes.
	(create_stmt_ann): Only allow GIMPLE statements.
	(dump_variable): Handle SSA names.
	(dump_may_aliases_for): Likewise.
	(may_access_global_mem_p): Handle SSA names.
	(remove_phi_arg): If the argument removed was the last one with
	real references, update the LHS of the PHI node.
	(add_phi_arg): If the argument added has real references, propagate
	the attribute into the LHS of the PHI node.

	* tree-pretty-print.c (dump_generic_node): Only retrieve basic
	block information from GIMPLE statements.
	Always output the THEN and ELSE clauses of COND_EXPR nodes.

	* tree-simple.c (is_gimple_stmt): Accept PHI_NODEs.
	(is_gimple_id): Accept SSA_NAMEs.

	* tree-ssa-copyprop.c (copyprop_phi): If an argument is used as a
	real operand, propagate the attribute into the LHS of the PHI.

	* tree-ssa-live.c (create_ssa_var_map): Don't set 'used' flag on
	both the operand and the result of VDEFs.
	Only register PHI results and arguments that have been used as real
	operands.
	(calculate_live_on_entry): Fix formatting in debugging message.

	* tree-ssa.c (register_new_def): Add new argument
	'is_real_operand'.  If it's set, set SSA_NAME_HAS_REAL_REFS for the
	new name.  Update all callers.
	(rewrite_operand): Add new argument 'is_real_operand'.  If it's
	set, set SSA_NAME_HAS_REAL_REFS to the operand.
	(eliminate_build): Ignore PHI arguments and PHI results that have
	not been used in real operands.
	(rewrite_vdefs): Remove.  Update all users.
	(set_is_used): Don't handle SSA names.
	(coalesce_ssa_name): Ignore PHI arguments that have not had real
	references in the program.

	* tree.c (make_ssa_name): Update documentation.
	* tree.h (IS_EMPTY_STMT): Call integer_zerop instead of comparing
	against size_zero_node.
	(SSA_NAME_HAS_REAL_REFS): Define.
	(SSA_NAME_OCCURS_IN_ABNORMAL_PHI): Define.
	(struct tree_ssa_name): Add bitfields 'has_real_refs' and
	'occurs_in_abnormal_phi'.

2003-06-30  Jeff Law  <law@redhat.com>

	* c-simplify.c (gimplify_c_loop): Don't return a LOOP_EXPR for
	a do ... while (0) loop.

	* expr.c (expand_expr, case COND_EXPR): Be smarter about expanding
	a COND_EXPR with only one useful arm, which happens to be a GOTO_EXPR.

	* tree-cfg.c (remove_useless_stmts_and_vars): Don't remove user
	variables unless we're at -O2 or higher.

2003-06-30  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (expr_phi_insertion): Stop optimizing the expression
	if we have > some very large number of ephi operands, as it will
	take an ungodly amount of memory and time.
	(pre_expression): Push/pop gc context so we can do gc collection
	in between expressions.
	Throw away expression info right after done optimizing it.

2003-06-30  Jason Merrill  <jason@redhat.com>

	* gimplify.c (gimplify_call_expr): Check PUSH_ARGS_REVERSED.

	* gimplify.c (gimplify_modify_expr): Also force a call with a
	possible nonlocal goto into a temporary.
	(gimplify_return_expr): Don't duplicate the MODIFY_EXPR.
	* tree-iterator.h (tsi_one_before_end_p): New fn.

2003-06-29  Jeff Sturm   <jsturm@one-point.com>

	* fold-const.c (fold): Don't save_expr unless TREE_SIDE_EFFECTS.

2003-06-26  Diego Novillo  <dnovillo@redhat.com>

	* c-simplify.c (gimplify_stmt_expr): Handle statement-expressions
	that don't end in a non-void expression.  Emit a warning in that
	case.

2003-06-26  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (fixup_domchildren): Rename from
	compute_domchildren, change to not use our own array.
	(domchildren): Remove variable.
	(insert_occ_in_preorder_dt_order_1): Use dom_children now.
	(insert_euse_in_preorder_dt_order_1): Ditto.
	(search_dt_preorder): Ditto.
	(handle_bb_creation): Fix to work properly.
	(tree_perform_ssapre): Remove remnants of domchildren.
	Redo dominator info if we have to due to a new block.

2003-06-26  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (handle_switch_split): Use a tree iterator to find the
	real split point rather than a block iterator.

2003-06-26  Jason Merrill  <jason@redhat.com>

	* tree-simple.c (is_gimple_stmt): Complete.

2003-06-24  Jeff Law  <law@redhat.com>

	* tree-cfg.c (remove_useless_stmts_and_vars): On the first
	iteration, remove unused variables from BIND_EXPRs.
	* tree-flow.h (var_ann_d): Add new field USED.
	(set_is_used): Prototype.
	(remove_useless_stmts_and_vars): Update prototype.
	* tree-ssa-live.c (create_ssa_var_map): Note which variables
	are used so that we can delete those which are not used.
	* tree-ssa.c (create_temp): Mark the new temporary as being used.
	(rewrite_out_of_ssa): Note if the call to remove_useless_stmts_and_vars
	is the first iteration or not.
	(set_is_used): New function.

	* c-decl.c (store_parm_decls): Variables and parameters on the
	pending_sizes chain have nonlocal uses.

2003-06-25  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c: Convert to ISO C.
	(handle_bb_creation): New function.
	(ephi_will_be_avail): Remove dead code.
	(finalize_1): Use handle_bb_creation, start to fix edge insertion
	related fun.
	(maybe_find_rhs_use_for_var): Stop using tree_stmt.
	(code_motion): Always get the temporary from the right place.

2003-06-24  Jason Merrill  <jason@redhat.com>

	* gimplify.c (gimplify_self_mod_expr): Add want_value parm.
	For postfix ops, make sure it returns an rvalue.
	(gimplify_expr): Copy a volatile reference into a temp.
	(create_tmp_var): Require a complete type.
	(create_tmp_alias_var): Use TYPE_VOLATILE on types.
	* tree-simple.c (is_gimple_stmt): Flesh out a bit.
	(is_gimple_val): Don't allow volatiles.

	* c-simplify.c (gimplify_expr_stmt): Don't insert a null pointer.

	* gimplify.c (gimplify_return_expr): Search through the gimple
	form for the interesting MODIFY_EXPR.
	(gimplify_modify_expr): Don't suppress posteffects if want_value.

2003-06-24  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (struct dfa_stats_d): Remove obsolete fields
	num_tree_refs and size_tree_refs.  Update all users.
	(dump_dfa_stats): Also dump information about VUSE and VDEF
	operands.
	* tree-ssa.c (rewrite_vdefs): Dump information about VDEF operators
	promoted to real copies if -fdump-tree-optimized-details is given.

2003-06-23  Jeff Law  <law@redhat.com>

	* tree-ssa.c (avail_expr_eq): Verify types are the same before
	handing expressions to operand_equal_p.

	* tree-cfg.c (make_edges): Remove fake edges before building
	extra edges for TRY_FINALLY_EXPRs.  Delete unnecessary edges
	leaving the TRY block in a TRY_FINALLY_EXPR.
	(find_contained_blocks): Don't consider statements in the CATCH
	clause of a TRY_CATCH_EXPR when noting the last statement in
	the block.
	* tree-dfa.c (remove_phi_arg): If we removed the last PHI argument,
	then remove the entire PHI node.
	* tree-ssa-dce.c (stmt_useful_p): Consider the other EH related
	nodes useful as well (TRY_FINALLY_EXPR, TRY_CATCH_EXPR, and
	EH_FILTER_EXPR).

	* tree-cfg.c (remove_useless_stmts_and_vars): If the body of a
	TRY_CATCH_EXPR is empty, then the entire TRY_CATCH_EXPR can
	be safely removed.

	* tree-cfg.c (find_contained_blocks): Renamed from
	find_contained_blocks_and_edge_targets.  Remove targets
	bitmap argument and no longer record targets of edges.
	All callers changed.
	(make_edges): No longer need TRY_TARGETS bitmap.  Kill it.
	Simplify code which creates additional edges out of the TRY
	block and the FINALLY block in a TRY_FINALLY_EXPR.

2003-06-23  Diego Novillo  <dnovillo@redhat.com>

	* tree-alias-common.c (ptr_may_alias_var): Don't handle memory
	tags.
	* tree-dfa.c (struct alias_set_d): Remove.  Update all users.
	(alias_sets): Remove.  Update all users.
	(struct walk_state): Remove field aliased_objects_found.
	(struct alias_map_d): New.
	(addressable_vars): New local variable.
	(pointers): New local variable.
	(add_stmt_operand): Do not force aliased variables to be in virtual
	operands.
	(register_alias_set): Remove.  Update all users.
	(find_alias_for): Remove.  Update all users.
	(get_memory_tag_for): New local function.
	(num_referenced_vars): Remove.
	(num_aliased_objects): Remove.  Update all users.
	(aliased_objects): Remove.  Update all users.
	(aliased_objects_alias_set): Remove.  Update all users.
	(num_call_clobbered_vars): Remove.  Update all users.
	(dump_variable): Move code to dump aliases ...
	(dump_may_aliases_for): ... here.
	(debug_may_aliases_for): New function.
	(compute_may_aliases): Initialize 'addressable_vars' and 'pointers'
	arrays.
	(compute_alias_sets): Re-implement matching pointers with
	addressable variables.  Limit the size of may-alias sets.
	(may_alias_p): Re-implement to compare pointers against variables,
	instead of memory tags.
	(dump_alias_info): Re-implement to display pointers and addresable
	variables arrays.
	(add_referenced_var): Collect addressable variables and pointers.
	Share memory tags among pointers that may alias each other.
	* tree-flow.h (num_referenced_vars): Change to macro.
	(referenced_var): Likewise.
	(num_call_clobbered_vars): Likewise.
	(call_clobbered_var): Likewise.
	(dump_may_aliases_for): Declare.
	(debug_may_aliases_for): Declare.
	* tree-ssa.c (rewrite_vdefs): New local function.
	(rewrite_out_of_ssa): Call it.

2003-06-23  Jeff Law  <law@redhat.com>

	* tree-cfg.c (make_edges): Walk TRY_FINALLYs inner to outer and
	simplify creation of special edges related to the TRY_FINALLY_EXPR.

	* tree-cfg.c (remove_useless_stmts_and_vars): More aggressively
	remove TRY_CATCH_EXPRs and TRY_FINALLY_EXPRs.

	* tree-cfg.c (make_edges): Remove fake edges.
	(make_exit_edges): Mark edges from nonreturning functions to the
	exit block as being fake edges.

	* gimplify.c (gimplify_modify_expr): Don't create a new MODIFY_EXPR,
	reuse the existing one.

2003-06-23  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (find_insert_location): Default case should insert after
	the last stmt in the block.

2003-06-22  Jeff Sturm  <jsturm@one-point.com>

	* Makefile.in (old-tree-inline.o): Remove rule.
	* old-tree-inline.c: Remove.

2003-06-19  Jeff Law  <law@redhat.com>

	* tree-cfg.c (make_ctrl_stmt_edges): Do not create bogus edges
	to the successor block of TRY_CATCH_EXPR, TRY_FINALLY_EXPR,
	CATCH_EXPR or EH_FILTER_EXPR nodes.

	* gimplify.c (gimplify_modify_expr): If the RHS of an MODIFY_EXPR
	might throw, then make sure its result goes into a temporary.

	* tree-cfg.c (handle_switch_split): Handle case where target
	block has only one statement (the case label itself).

2003-06-19  Diego Novillo  <dnovillo@redhat.com>

	* doc/invoke.texi: Add documentation for -ftree-dominator-opts
	that was missing from an earlier patch.

2003-06-19  Jeff Sturm  <jsturm@one-point.com>

	* gimplify.c (gimplify_expr): Handle LABELED_BLOCK_EXPR
	and EXIT_BLOCK_EXPR.
	(gimplify_labeled_block_expr): New function.
	(gimplify_exit_block_expr): New function.

2003-06-18  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (EDGE_INSERT_LOCATION_BSI_AFTER): New location code.
	(cleanup_switch_expr_graph): Find default case correctly.
	(bsi_insert_after): Get BB from stmt when its avialble.
	(bsi_insert_before): Get BB from stmt when its avialble.
	(handle_switch_fallthru): New. Handle edge from switch to the fallthru.
	(handle_switch_split): Re-implement using new scheme.
	(find_insert_location): Use handle_switch_fallthru ().
	(bsi_insert_on_edge_immediate): Handle EDGE_INSERT_LOCATION_BSI_AFTER.
	* tree-iterator.h (tsi_last): New. Find last stmt in a chain.

2003-06-17  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c (find_func_aliases): Guard cast op
	properly.
	(ptr_may_alias_var): Small optimization to avoid calling
	decl_function_context so often.
	* tree-alias-ander.c (ander_simple_assign): Ignore if lhs == rhs.

2003-06-17  Steven Bosscher  <steven@gcc.gnu.org>

	* timevar.def (TV_TREE_BUILD_FUD_CHAINS): Remove.

2003-06-16  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-ccp.c (DONT_SIMULATE_AGAIN): Define.
	(visit_phi_node): Don't do anything if the PHI node doesn't need to
	be simulated.
	If the PHI variable does not have real references, consider it
	VARYING.
	If the PHI node has a lattice value of VARYING, set
	DONT_SIMULATE_AGAIN.
	(visit_stmt): Don't do anything if the statement doesn't need to be
	simulated.
	Only visit conditional branches COND_EXPR and SWITCH_EXPR.
	If the statement doesn't produce a result mark it with
	DONT_SIMULATE_AGAIN.
	(visit_assignment): Remove unnecessary def_op() check.
	If the value is VARYING, mark the statement with
	DONT_SIMULATE_AGAIN.
	(visit_cond_stmt): Remove unnecessary is_ctrl_stmt() check.
	If the predicate is VARYING, mark the statement with
	DONT_SIMULATE_AGAIN.
	(initialize): Clear DONT_SIMULATE_AGAIN flag for every statement
	and PHI node.
	(likely_value): Get statement operands after checking if it makes
	aliased loads or has volatile operands.

2003-06-16  Jeff Law  <law@redhat.com>
	    Jason Merrill  <jason@redhat.com>

	* except.c (enum eh_region_type): Don't declare the enumeration
	members here.  Instead do it in except.h.
	(expand_eh_hander): Use expr_first instead of open-coding it.
	* except.h (enum eh_region_type): Define the enumeration memebers
	here.
	* tree-cfg.c (last_exec_block): Break out from make_edges.
	(could_trap_p): No longer static.
	(get_eh_region_type): New function.
	(make_try_expr_blocks): Keep the whole TRY_CATCH_EXPR or
	TRY_FINALLY_EXPR instead of just the handler part in the
	EH_STACK varray.  For a cleanup, record which cleanup higher
	in the EH_STACK it can reach.
	(make_edges): Use last_exec_block.
	(make_ctrl_stmt_edges): Thread cleanups as needed.
	(compute_reachable_eh):  Use get_eh_region_type.  Properly
	track when we can skip cleanups.  Skip cleanups when possible.
	* tree-flow.h (could_trap_p): Prototype.

2003-06-16  Andrew Macleod  <amacleod@redhat.com>

	* tree-cfg.c (find_insert_location): Check for control_altering stmts,
	and abort if its an unrecognized BB ending stmt.
	(bsi_commit_first_edge_insert): Rename to bsi_insert_on_edge_immediate,
	externalize, and change the interface to an on-demand inserter.
	(bsi_commit_edge_inserts): Call bsi_insert_on_edge_immediate().
	* tree-flow.h (bsi_insert_on_edge_immediate): Prototype.
	* tree-pretty-print.c (dump_block_info): Add 'ab' for abnormal edges.
	* tree-ssa-dce.c (process_worklist): Use sparse bitmaps.
	* tree-ssa-live.c (calculate_live_on_entry): Abort if ssa_name has a
	definition, but is also live on entry.
	* tree-ssa.c (coalesce_ssa_name): Call abort() instead of error(), and
	provide more detailed info.
	(rewrite_out_of_ssa): Provide CFG dumps before and after rewritting.

2003-06-16  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mf_mark): Use GC-compatible htab_create_ggc.

2003-06-15  Jeff Law  <law@redhat.com>

	* tree-ssa-ccp.c (visit_phi_node): If the PHI is already known
	to be varying, don't recompute its value.

2003-06-14  Jeff Law  <law@redhat.com>
	    Jason Merrill <jason@redhat.com>

	* tree-cfg.c (make_blocks): Do not return early if presented
	with an empty statement.
	(make_ctrl_stmt_edges):  Do not try to optimize an empty TRY
	block in a TRY_FINALLY_EXPR.  Simplify TRY_FINALLY_EXPR,
	TRY_CATCH_EXPR, CATCH_EXPR, and EH_FILTER_EXPR now that empty
	statements are no longer shared.

2003-06-14  Kazu Hirata  <kazu@cs.umass.edu>

	* tree-ssa-pre.c: Fix a comment typo.

2003-06-13  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (get_stmt_operands): Abort if the statement is a
	variable.
	(create_var_ann): Abort if the variable is not a _DECL node.

2003-06-13  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mudflap_c_function): Change calling conventions so
	as to return the instrumented function body rather than changing the
	given fndecl in place.  Gimplify at the very end, for cosmetic
	reasons.
	* tree-mudflap.h, tree-nomudflap.c: Corresponding changes.
	* c-decl.c (c_expand_body_1): Call mudflap_c_function just before
	rtl expansion of function body; don't interfere with inlining.

2003-06-13  Diego Novillo  <dnovillo@redhat.com>

	* c-simplify.c: Fix typo in previous change.

2003-06-13  Diego Novillo  <dnovillo@redhat.com>

	* c-common.c, c-common.h, c-decl.c, c-lang.c, c-simplify.c,
	flags.h, gimplify.c, langhooks-def.h, langhooks.c, langhooks.h,
	simple-break-elim.c, simple-goto-elim.c, toplev.c,
	tree-alias-common.c, tree-cfg.c, tree-dfa.c, tree-dump.c,
	tree-inline.c, tree-mudflap.c, tree-simple.c, tree-simple.h,
	tree-ssa-ccp.c, tree-ssa-pre.c, tree-ssa.c, tree.h, doc/invoke.texi:
	Rename SIMPLE to GIMPLE everywhere.

2003-06-13  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (bsi_commit_first_edge_insert): Only consider non-abnormal
	edges when determining whether an edge needs to be split.

	* tree-ssa-dce.c (process_worklist): When checking for GOTO and
	COND_EXPR's that are necessary, check each BB's predecessors only once.

2003-06-12  Jeff Law  <law@redhat.com>

	* tree-ssa.c (avail_expr_eq): Add some checking code to
	detect when equal expressions have different hash values.

	* tree.c (iterative_hash_expr): Don't hash types associated
	with conversions.  Instead hash on the signedness of the
	toplevel object and the operand of the conversion.

	* Makefile.in (gimplify.o): Depend on $(RTL_H).  Ugh.
	* gimplify.c: Include "rtl.h".
	(simplify_call_expr): Use call_expr_flags and check for ECF_CONST
	rather than checking bits in the tree node directly.

	* fold-const.c (operand_equal_p): CALL_EXPRs with side effects
	are never equal.

2003-06-11  Frank Ch. Eigler  <fche@redhat.com>

	* gcc.c (MFWRAP_SPEC): Always wrap main().
	* tree-mudflap.c (mudflap_enqueue_decl): Mark enqueued decls
	to prevent their repeated processing.

2003-06-11  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c: add graph_dump_file, graph_dump_flags.
	(finalize_1): Modify to use temporary in expr_info structure,
	remove temporary from arguments.
	Use bsi_insert_on_edge for ephi insertions.
	Set EREF_TEMP on inserted euses.
	(repair_phi_injury): Note (to dump file)  injuries we have
	repaired already.
	(repair_use_injury): Ditto.
	(repair_euse_injury): Ditto.
	(count_stmts_in_bb): Count both forwards and backwards, and make
	sure the numbers agree. This makes sure both the head and end are
	updated properly.
	(code_motion): Use the EREF_TEMP, rather than calculating the
	reaching def, when possible, because it's faster.
	Add the phi we created when we insert the ephi.  We should always
	be able to get the reaching def of the ephi from EREF_TEMP (since
	the args should have already been inserted, or in the case of
	phi's, have a phi already allocated), so abort if we can't.
	(create_expr_ref): Take expr_info parameter.  Make a phi for the
	ephi's, but don't add to the bb yet. Update all callers.
	(get_default_def): New function.
	(get_reaching_def): Use it to find the default def when we hit the
	top of the dom tree.
	(struct expr_info): Add temp.
	(new_rename_1): Dump out occurrences after rename 1, but before
	rename 2.
	(requires_edge_placement): Now that we can insert on edges, we
	shouldn't need this, so make it always return false.
	Will remove unless something bad comes up.
	(pre_expression): Start working on dumping the redundancy graph.

	* tree.h (struct treeeref_common): Add the temp member.
	Add EREF_TEMP macro.
	(tree_dump_index): Reorder to match actual optimization order.
	Add TDI_predot.

	* tree-dump.c: Ditto.

2003-06-11  Jeff Law  <law@redhat.com>

	* gimplify.c (simplify_call_expr): Clear TREE_SIDE_EFFECTS for
	calls to "const" functions.

	* tree-inline.c (expand_call_inline): Recalculate TREE_SIDE_EFFECTS
	properly when inlining gimplified functions.

	* fold-const.c (operand_equal_p): Handle CALL_EXPRs.

	* tree-cfg.c (first_exec_block): Kill.
	(make_edges): Use bb_for_stmt rather than first_exec_block.
	(make_ctrl_stmt_edges, make_exit_edges): Likewise.
	(make_loop_expr_edges, make_cond_expr_edges): Likewise.
	(successor_block): Don't skip empty statements.

	* tree-ssa.c (rewrite_and_optimize_stmt): Do not special case
	CALL_EXPRs they're caught by the TREE_SIDE_EFFECTS test.

	* tree-ssa.c (rewrite_and_optimize_stmt): Improve/correct setting of
	may_optimize_p.  Simplify later code knowing may_optimize_p is
	correctly set.
	(avail_expr_hash): Do not use iterative_hash_object or deal with
	SSA names for real operands.  Instead use iterative_hash_expr
	which handles both.
	(avail_expr_eq): Use operand_equal_p to test for equality.

2003-06-11  Steven Bosscher  <steven@gcc.gnu.org>

	* tree-flow.h, tree-ssa-ccp.c, tree-ssa-copyprop.c,
	tree-ssa-dce.c, tree-ssa-live.c, tree-ssa-live.h:
	Convert function prototypes to ISO C.

2003-06-10  Jeff Law  <law@redhat.com>

	* toplev.c (parse_options_and_default_flags): Fix typo in last change.

	* gimplify.c (simplify_expr, case BIT_FIELD_REF): Make sure
	to call recalculate_side_effects after gimplifying the
	operands.

2003-06-10  Diego Novillo  <dnovillo@redhat.com>

	* toplev.c (flag_tree_dom): New variable.
	(f_options): Add new entry for -ftree-dominator-opts.
	(parse_options_and_default_flags): Enable flag_tree_dom for
	-O1 and higher.  At -O2 and higher, disable flag_tree_dom is
	SSA-PRE is also specified.
	* flags.h (flag_tree_dom): Declare.
	* doc/invoke.texi: Document -ftree-dominator-opts.
	* tree-ssa.c (rewrite_block): Disable tracking of available
	expressions when not doing dominator optimizations.
	Call rewrite_stmt when not doing dominator optimizations.
	Otherwise, call rewrite_and_optimize_stmt.
	(rewrite_stmt): Don't optimize the statement.  Just rename.
	(rewrite_and_optimize_stmt): Optimize the statement while rewriting
	its operands.
	(lookup_avail_expr): Update comments.

2003-06-10  Andrew Haley  <aph@redhat.com>

	* c-simplify.c (c_simplify_stmt): case ASM_STMT: Ensure qualifiers
	come from input statement.

2003-06-09  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (handle_switch_split): Update PHI nodes when splitting.
	(tree_split_edge): Update PHI nodes in destination block.

2003-06-09  Steven Bosscher  <steven@gcc.gnu.org>

	* basic-block.h, tree-dfa.c, tree-ssa.c, tree-cfg.c,
	tree-flow.h: Convert function prototypes to ISO C.

2003-06-09  Daniel Berlin  <dberlin@dberlin.org>

	* tree-cfg.c (bsi_commit_edge_inserts): Fix computation of
	new_blocks.

2003-06-08  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (handle_switch_split): Don't allocate basic block
	annotations more than once.
	(bsi_commit_first_edge_insert): Likewise.

2003-06-07  Jeff Sturm  <jsturm@one-point.com>

	* tree-cfg.c (could_trap_p): New function.
	(stmt_ends_bb_p): Handle flag_non_call_exceptions.
	(make_exit_edges): Handle flag_non_call_exceptions.
	(is_ctrl_altering_stmt): Handle flag_non_call_exceptions.
	* tree-inline.c (walk_tree): Add case for CHAR_TYPE.
	* tree-ssa-dce.c (stmt_useful_p): Keep all CATCH_EXPRs.

2003-06-05  Jason Merrill  <jason@redhat.com>

	* stmt.c (asm_op_is_mem_input): New fn.
	* tree.h: Declare it.
	* gimplify.c (simplify_asm_expr): Call resolve_asm_operand_names.
	Use is_simple_modify_expr_lhs for mem input ops.

2003-06-05  Frank Ch. Eigler  <fche@redhat.com>

	* c-mudflap.c (mflang_register_call): Give the synthetic decl
	undefined (not zero) size.

2003-06-05  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mx_flag): Remove.  Update callers to use mf_mark.
	(TREE_MUDFLAPPED_P): Remove.  Update callers to use mf_marked_p.
	(mf_mark, mf_marked_p): Replacement functions to replace old node
	marking based on tree flag-bits.
	(mf_mostly_copy_tree_r): Preserve markedness across copies.
	* tree-mudflap.h: Add new decls
	* c-mudflap.c (mx_flag): Remove.  Update callers to use mf_mark.

2003-06-04  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (add_stmt_operand): Always consider non-scalar types
	virtual operands.

2003-06-04  Andrew MacLeod  <amacleod@redhat.com>

	* toplev.c (parse_options_and_default_flags): Turn tree_copyprop on by
	default.
	* tree-cfg.c (linearize_control_structures, linearize_cond_expr,
	replace_stmt, merge_tree_blocks, remap_stmts): Fix PROTOS.
	(find_insert_location): Add additional basic block parameter. Handle
	switch stmts.
	(handle_switch_split): New. Split edges to switch labels.
	(bsi_commit_first_edge_insert): Add extra parameter to
	find_insert_location call. Fix split block chaining in THEN & ELSE.
	* tree-ssa-live.c (calculate_live_on_entry): Process all PHI def's
	after all the arguments have been processed.
	* tree-ssa.c (struct ssa_stats_d, struct loops *loops, var_is_live,
	rewrite_into_ssa): Remove old UNSSA code.
	(rewrite_block): Remove stmt is rewrite_stmt returns 1.
	(assign_vars): Remove abort and enable overlapping live ranges.
	(replace_variable): New. Replace SSA name with the partition variable.
	(rewrite_out_of_ssa): Use replace_variable().
	(dump_tree_ssa_stats): Remove old UNSSA code.
	(rewrite_stmt): Return 1 if stmt should be deleted. Remove old
	UNSSA code.

2003-06-03  Diego Novillo  <dnovillo@redhat.com>

	* gimplify.c (simplify_call_expr): Move code to mark MD builtins
	non-simplifiable...
	* tree-simple.c (is_simple_call_expr): ... here.

2003-06-03  Diego Novillo  <dnovillo@redhat.com>

	* c-parse.in: Fix botched merge.

2003-06-03  Diego Novillo  <dnovillo@redhat.com>

	* tree-mudflap.c (MARK_TREE_MUDFLAPPED, TREE_MUDFLAPPED):
	Use TREE_VISITED instead of TREE_BOUNDED.
	* c-mudflap.c (TREE_MUDFLAPPED): Likewise.
	* tree-pretty-print.c (dump_generic_node): Remove
	references to TYPE_QUAL_BOUNDED.

2003-06-03  Jason Merrill  <jason@redhat.com>

	* gimplify.c (simplify_cond_expr): Call truthvalue_conversion
	before invert_truthvalue.

2003-06-02  Daniel Berlin  <dberlin@dberlin.org>

	* tree-dfa.c (compute_may_aliases): Call delete_alias_vars whenever we
	call create_alias_vars.

	* tree-alias-common (ptr_may_alias_var): Cleanup determination of
	global vars and whatnot.

2003-06-02  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (tree-ssa.o, tree-cfg.o): Add dependency on cfgloop.h
	(tree-optimize.o): Remove dependency on cfgloop.h.
	* basic-block.h (struct basic_block_def): Fix documentation for
	field 'loop_father'.
	* tree-dfa.c (add_referenced_var): Fix type of element
	pushed into aliased_objects_alias_set.
	* tree-optimize.c: Don't include cfgloop.h
	(optimize_function_tree): Move code to initialize loop optimizer...
	* tree-cfg.c (build_tree_cfg): ... here.
	* tree-ssa.c: Include cfgloop.h.
	(loops): New file local variable.
	(rewrite_into_ssa): Initialize/finalize loop optimizer.
	(rewrite_stmt): Call var_is_live when processing redundant
	assignments to the same LHS.
	(var_is_live): Add heuristic to discover overlapping definitions in
	loops that do not have PHI nodes for VAR at the loop header.

2003-06-02  Jason Merrill  <jason@redhat.com>

	* gimplify.c (simplify_expr): Only allow a cast from a 'val'.
	* tree-simple.c (is_simple_cast): Likewise.

2003-06-02  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (bsi_insert_before): Update end of block pointer if we
	inserted before the last stmt in a block. (The container changed).
	* tree-ssa.c (elim_backward): Inserting copy should be within
	conditional check.
	(elim_create): Only select one bit instead of the all.

2003-06-01  Jason Merrill  <jason@redhat.com>

	* Makefile.in: Remove lots of -Wno-error targets.

	* tree-simple.c (recalculate_side_effects): Check TREE_THIS_VOLATILE.

	* gimplify.c (simplify_compound_lval): Call
	recalculate_side_effects on each of the subexpressions.

	* expr.c (expand_expr) <COND_EXPR>: Use the if-statement code if
	it's void.

2003-06-01  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c: Remove setting of DECL_CONTEXT in temp vars,
	it's done in create_tmp_alias_var for us.
	(ptr_may_alias_var): Check if the variables are memory tags, and get
	the associated pointers if they are.

2003-05-30  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mudflap_c_function, enqueue_constant, enqueue_decl):
	Rework dumping logic.

2003-05-27  Jason Merrill  <jason@redhat.com>

	* tree-ssa.c (avail_expr_hash): Simplify by using iterative_hash_expr
	in more places.
	* tree.c (iterative_hash_expr): Handle SSA_NAME.

2003-05-29  Jeff Law  <law@redhat.com>

	* tree-ssa.c (rewrite_stmt): Detect and remove redundant
	memory loads.
	(avail_expr_hash): Use iterative_hash_expr, not iterative_hash_object
	as needed.

2003-05-27  Jason Merrill  <jason@redhat.com>

	* gimplify.c (shortcut_cond_expr): Avoid jumps to jumps.

2003-05-26  Jason Merrill  <jason@redhat.com>

	* c-simplify.c (simplify_switch_stmt): A SWITCH_EXPR also gets the
	source location of its first line.

2003-05-24  Diego Novillo  <dnovillo@redhat.com>

	Do not consider INDIRECT_REF nodes to be variables.

	* gimplify.c (create_tmp_alias_var): Allow temporaries of
	ARRAY_TYPE to be created.
	Create new temporaries with function scope.
	Don't call build_type_variant.
	Mark the temporary volatile if its type is volatile.

	* tree-dfa.c: Change every function that received a variable and
	its base symbol to just receive the variable.  Update all callers.
	(struct alias_set_d): Remove field 'tag_sym'.
	Add documentation for fields.
	(struct walk_state): Add field 'is_indirect_ref'.
	Add documentation for fields.
	(opf_ignore_bp): Remove.  Update all users.
	(aliased_objects_base): Remove.  Update all users.
	(get_stmt_operands): If the statement had virtual operands, do not
	scan them again.
	(get_expr_operands): Handle INDIRECT_REF nodes by adding an operand
	for the memory tag represented and a use for the base pointer.
	Don't add VUSE operands for pointer arguments to functions.
	Force a virtual operand when processing ADDR_EXPR nodes.
	(add_stmt_operand): If the variable is an alias tag, always add it
	as a virtual operand.
	Remove code to handle INDIRECT_REF nodes.
	Move code to determine if a pointer may point to global memory to
	find_vars_r.
	Set has_volatile_ops flag in the statement when adding operands for
	globals and local statics.
	If the variable is an alias tag, mark the statement as making
	aliased loads or stores.
	(set_def): Mark the variable as having real references.
	(add_use): Likewise.
	(add_vdef): Remove code to re-add previous virtual operands.
	If PREV_VOPS is set, don't add a new virtual operand.
	(add_vuse): Likewise.
	(dump_variable): Show annotation bitfields 'mem_tag',
	'occurs_in_abnormal_phi', 'is_alias_tag' and 'is_stored'.
	(compute_may_aliases): Initialize walk_state.is_indirect_ref to 0.
	(compute_alias_sets): Don't remove alias sets with exactly one
	entry.
	(register_alias_set): Re-implement to support memory tags instead
	of INDIRECT_REF nodes.  Document algorithm.
	(find_alias_for): Likewise.
	(may_alias_p): Likewise.
	(add_may_alias): Likewise.
	(find_vars_r): If a pointer assignment is found and the RHS of the
	assignment may access global memory, mark the pointer as pointing
	to global memory.
	Handle INDIRECT_REF nodes by marking the base pointer as
	dereferenced.
	Do not share INDIRECT_REF nodes.
	(add_referenced_var): Don't handle INDIRECT_REF nodes.
	If called from a store operation, mark the variable as stored.
	By default mark the variable as not having real references.
	When processing a pointer that has been dereferenced, create a
	memory tag for the pointer.
	(add_indirect_ref_var): Remove.  Update all callers.
	(get_virtual_var): Don't handle INDIRECT_REF nodes.
	(find_hidden_use_vars_r):

	* tree-flow-inline.h (get_var_ann): New function.  Change all
	functions that called var_ann and create_var_ann to call
	get_var_ann.
	(get_stmt_ann): Likewise.
	(set_indirect_ref): Remove.  Update all callers.
	(indirect_ref): Remove.  Update all callers.
	(create_indirect_ref): Remove.  Update all callers.

	* tree-flow.h (struct var_ann_d): Remove fields 'is_loaded',
	'unused' and 'indirect_ref'.
	Add fields 'mem_tag', 'is_mem_tag', 'is_alias_tag' and
	'has_real_refs'.
	(get_var_ann, get_stmt_ann): Declare.
	(create_indirect_ref, set_indirect_ref, indirect_ref): Remove.

	* tree-pretty-print.c (dump_generic_node): Don't handle
	INDIRECT_REF nodes inside SSA_NAME nodes.

	* tree-simple.c (get_base_symbol): Don't handle INDIRECT_REF nodes.
	(is_simple_unary_expr): Don't call STRIP_NOPS.

	* tree-ssa-copyprop.c (get_original): Don't handle INDIRECT_REF
	nodes.  Allow pointers to be copy propagated.

	* tree-ssa-dce.c (need_to_preserve_store): Don't handle
	INDIRECT_REF nodes.

	* tree-ssa-live.c (create_ssa_var_map): Only process variables that
	have real references.

	* tree-ssa.c: Update documentation regarding INDIRECT_REF nodes.
	(update_indirect_ref_vuses): Remove.  Update all users.
	(update_pointer_vuses): Remove.  Update all users.
	(MAY_COPYPROP_P): Remove.  Update all users.
	(create_temp): Don't handle INDIRECT_REF nodes.
	(coalesce_ssa_name): Ignore variables that have no real references.
	(rewrite_stmt): Mark the statement modified if a new copy or
	constant was propagated into it.
	Don't special-case pointers.
	(rewrite_operand): Don't handle INDIRECT_REF nodes.
	* tree.h (SSA_VAR_P): Remove.  Update all users.
	(SSA_DECL_P): Rename to SSA_VAR_P.

2003-05-22  Jeff Law  <law@redhat.com>

	* gimplify.c (simplify_expr): Avoid gimplifying expressions which
	are already in gimple form.
	* tree-simple.c (is_simple_constructor): No longer treat TREE_STATIC
	constructors specially.
	(is_simple_addr_expr_arg): If we're taking the address of a label
	for the first time, then the ADDR_EXPR is not in gimple form.

2003-05-22  Jason Merrill  <jason@redhat.com>

	* tree-cfg.c (compute_reachable_eh): Don't skip cleanups.

	* tree-dfa.c (add_referenced_var): Read-only INDIRECT_REFs can
	also be clobbered by function calls.

2003-05-22  Jeff Law  <law@redhat.com>

	* expr.c (convert_move): Avoid making silly copies.
	(expand_expr, case BIND_EXPR): Correctly determine when the
	result of the BIND_EXPR will not be used.

2003-05-21  Jason Merrill  <jason@redhat.com>

	* tree-cfg.c (compute_reachable_eh): Handle multiple CATCH_EXPRs.

	* builtins.c (simplify_builtin_next_arg): Split out from...
	(expand_builtin_next_arg): ...here.
	(simplify_builtin_va_start): Split out from...
	(expand_builtin_va_start): ...here.
	(simplify_builtin): Call it.
	* gimplify.c (simplify_call_expr): If simplify_builtin worked,
	just return.

2003-05-20  Jason Merrill  <jason@redhat.com>

	* gimplify.c (shortcut_cond_expr, shortcut_cond_r): Rewrite.
	(simplify_cond_expr): Also invert ifs with no 'then'.
	(build_and_jump): New fn, split out from...
	(gimplify_exit_expr): ...here.  Don't bother gimplifying the
	condition.

	* gimplify.c (simplify_save_expr): Add post-effects to the
	postqueue.

	* gimplify.c (mostly_copy_tree_r): Don't unshare constants.

2003-05-20  Jeff Law  <law@redhat.com>

	* expr.c (expand_expr, case COND_EXPR): Avoid useless RTL generation
	when the THEN or ELSE arm is empty.

	* tree-cfg.c (make_loop_expr_blocks): Do not accept next_block_link
	as an argument, make it a local variable.  Callers changed.

	* tree-cfg.c (remove_useless_stmts_and_empty_vars): Eliminate
	GOTO_EXPRs which jump to the next statement occuring in an
	outer control/block structure nest.

2003-05-20  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-ccp.c (set_rhs): Fix typo in handling of
	RETURN_EXPR nodes.

2003-05-19  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c (alias_get_name): Handle unnamed variables once
	and for all.

2003-05-19  Jeff Law <law@redhat.com>

	* tree-ssa-dce.c (remove_conditional): If the conditional's block
	has no post dominator in the CFG, then wire it to the exit node.
	Avoid unnecessary check of bb->succ.

2003-05-17  Daniel Berlin  <dberlin@dberlin.org>

	* tree-pretty-print.c (MASK_POINTER): Parameter is P, not node.

2003-05-17  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c (get_alias_var): Handle REFERENCE_EXPR.
	(find_func_aliases): Ditto.
	(get_alias_var): Use POINTER_TYPE_P.

2003-05-16  Frank Ch. Eigler  <fche@redhat.com>

	* gcc.c (cc1_options): Correct "-fmudflapth" handling.
	* tree-mudflap.c (mudflap_c_function, mf_build_check_statement_for):
	Use locally cached mask/shift values only in single-threaded mode.

2003-05-16  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c (ptr_may_alias_var): Fix DECL_CONTEXT
	checking.

2003-05-16  Andrew MacLeod  <amacleod@redhat.com>

	* tree-flow.h (ssa_make_edge): Remove prototype.
	* tree-ssa-dce.c (remove_dead_stmt): Change comment about removing
	conditionals.
	(remove_conditional): Don't update PHI nodes or call ssa_make_edge.
	* tree-ssa.c (ssa_make_edge): Remove.

2003-05-16  Jeff Law  <law@redhat.com>

	* tree-cfg.c (remove_useless_stmts_and_vars): Handle case where
	both arms of an if-then-else simply jump to the same location.

	* tree-ssa-ccp.c (get_rhs): Correctly handle MODIFY_EXPR embedded in
	a RETURN_EXPR.
	(set_rhs): Likewise.

2003-05-15  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>

	* Makefile.in (regmove.o-warn): Change to -Wno-error.

2003-05-15  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (enum find_location_action): Enum for find_insert_location.
	(bsi_insert_before): Handle insert at start of a BB and update pointers
	from parents if appropriate.
	(find_insert_location): Handle COND_EXPR properly. Return
	an enum type indicating what action to take on the returned value.
	(bsi_commit_first_edge_insert): Use new returned action.

2003-05-15  Jeff Law  <law@redhat.com>

	* tree-cfg.c (make_edges): Factor out loop invariants from
	code to insert edges from the TRY to the FINALLY block.
	Avoid creating unnecessary edges from the end of the
	FINALLY block back to the start of the FINALLY block.

2003-05-15  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa.c (rewrite_out_of_ssa): Undo previous patch.

2003-05-15  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa.c (rewrite_out_of_ssa): Don't dump the optimized
	function after the SSA->normal pass.

2003-05-14  Toon Moene  <toon@moene.indiv.nluug.nl>

	* Makefile.in: Add additional -Wno-error targets for Alpha.

2003-05-13  Jason Merrill  <jason@redhat.com>

	* gdbinit.in (pgs, pge): New macros.

	Implement expression temporary optimization.
	* gimplify.c (gimplify_ctx): Add temp_htab field.
	(push_gimplify_context): Initialize it.
	(pop_gimplify_context): Destroy it.
	(simplify_expr): If there's no internal postqueue, generate an
	expression temporary.
	(gimple_tree_hash, gimple_tree_eq): New fns.
	(create_tmp_from_val, lookup_tmp_var): New fns.
	(get_formal_tmp_var): New fn.
	(internal_get_tmp_var): New fn.
	(get_initialized_tmp_var): Use it.
	* tree-simple.h: Declare it.

	* gimplify.c (simplify_cond_expr): Reorganize.
	(shortcut_cond_expr, shortcut_cond_r): New fns.
	(build_and_jump): New fn.
	(gimplify_exit_expr): Use it.

	* gimplify.c (simplify_expr): Do better at stripping unnecessary
	NOPs.  Tidy GOTO_EXPR handling.  Don't allow NON_LVALUE_EXPR.
	* tree-simple.c (is_simple_modify_expr): Don't allow NON_LVALUE_EXPR.
	(is_simple_binary_expr, is_simple_condexpr): Likewise.
	(is_simple_unary_expr, is_simple_compound_lval): Likewise.
	(is_simple_id): Likewise.

	* tree-ssa.c (rewrite_stmt): Discard redundant assignments.
	(avail_expr_eq): Don't test ops1 == ops2.
	(avail_expr_hash): Use iterative_hash_object.

2003-05-13  Jeff Law  <law@redhat.com>

	* tree-cfg.c (cleanup_tree_cfg): Update comments.   Set repeat
	anytime we remove a control structure.

	* tree-flow.h (struct var_ann_d): New field occurs_in_abnormal_phi.
	* tree-ssa.c (MAY_COPYPROP_P): Do not allow copy propagations
	if either argument occurs in an abnormal phi.
	* tree-dfa.c (add_phi_arg): Set occurs_in_abrnomal_phi as needed.
	* tree-ssa-copyprop.c (copyprop_stmt): Do not allow copy
	propagations if either argument occurs in an abnormal phi.
	(copyprop_phi): Likewise.

2003-05-12  Diego Novillo  <dnovillo@redhat.com>

	* c-common.h (STATEMENT_CODE_P): Use size_t cast instead
	of int.
	(INIT_STATEMENT_CODES): Change type of local variable i to
	size_t.

2003-05-12  Diego Novillo  <dnovillo@redhat.com>

	* c-pretty-print.c (dump_c_node): Call CONSTRUCTOR_ELTS
	to access the operand of a CONSTRUCTOR node.
	* tree-pretty-print.c (dump_generic_node): Likewise.

2003-05-11  Diego Novillo  <dnovillo@redhat.com>

	* c-simplify.c (simplify_if_stmt): Replace calls to
	warning_with_file_and_line with warning.

2003-05-12  Frank Ch. Eigler  <fche@redhat.com>

	* toplev.c (lang_independent_options): Add "-fmudflapth".
	* flags.h (flag_mudflap): Document meaning of >1 value.
	* gcc.c (MFWRAP_SPEC, MFLIB_SPEC): Add -fmudflapth support.
	(cpp_unique_options, cc1_options): Ditto.

2003-05-10  Sebastian Pop  <s.pop@laposte.net>

	* gimplify.c (simplify_expr): Replace CONST_DECL with its DECL_INITIAL.

2003-05-09  Sebastian Pop  <s.pop@laposte.net>

	* tree-optimize.c (optimize_function_tree): Clarify the use of the
	loop analyzer.

2003-05-09  Jeff Law  <law@redhat.com>

	* c-simplify.c (simplify_cleanup): Remove code which optimizes
	TRY_FINALLY and TRY_CATCH.  It doesn't trigger.

	* tree-cfg.c (remove_useless_stmts_and_vars): Optimize away
	TRY_CATCH and TRY_FINALLY blocks when possible.

2003-05-09  Diego Novillo  <dnovillo@redhat.com>

	* tree-pretty-print.c (dump_generic_node): CONSTRUCTOR
	nodes have only one operand now.

2003-05-08  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (pdom_info): New file level static.
	(cleanup_tree_cfg): Free dominance info, if it was used.
	(bsi_replace): New. Replace a stmt with a new one.
	(linearize_cond_expr): Use post dominator info to determine is a
	conditional can be safely removed.
	(find_insert_location): New. Determine where to insert a new stmt that
	is placed on a split edge.
	(bsi_commit_first_edge_insert): Use find_insert_location to determine
	where to link a stmt when splitting an edge.
	(merge_tree_blocks): When deleting a basic block, remove it from the
	dominance structure if it exists.
	* tree-dfa.c (add_stmt_operand): Don't rename local statics. Treat
	them just like globals.
	* tree-flow.h (struct var_ann_d): Add root_var_processed bit and
	root_index fields.
	* tree-ssa-dce.c (process_worklist): Mark conditions feeding PHI's as
	necessary as well.
	(remove_dead_phis): Add missing debug information.
	* tree-ssa-live.c (var_union): Handle combining partitions when one
	has a root_variable as a representative.
	(compact_var_map): Add comments and use flags.
	(init_root_var): Use new root_var fields in struct var_ann_d.
	(dump_root_var): Send output to specified file, not stderr.
	(dump_var_map): Remove dump_flag parameter & some grotesque debug info.
	* tree-ssa-live.h (VAR_ANN_ROOT_INDEX): Define.
	(VARMAP_NORMAL, VARMAP_NO_SINGLE_DEFS): Define flags for compact_var_map.
	(var_to_partition_to_var): Return NULL if not in a partition.
	(find_root_var): Use VAR_ANN_ROOT_INDEX.
	* tree-ssa.c (insert_copy_on_edge): Add listing info.
	(coalesce_ssa_name): Coalesce live-on-entry variables to their root.
	Coalesce partitions across abnormal edges.
	(assign_vars): Remove redundant initialization code. Handle root_vars
	which have already been coalesced to a partition.
	(rewrite_out_of_ssa): Add debug info & remove PHI nodes when processed.
	(rewrite_stmt): Don't redefine redundant expressions.

2003-05-08  Jeff Law  <law@redhat.com>

	* c-simplify.c (simplify_expr_stmt): Make sure to
	simplify the body of the EXPR_STMT.

	* tree-dfa.c (remove_decl): Accept new argument for the block
	to start the search.
	* tree-flow.h (remove_decl): Update prototype.
	* tree-cfg.c (remove_stmt): Pass the toplevel block to
	remove_decl.

	* tree-dfa.c (find_hidden_use_vars): No longer returns a value.
	Callers and prototype updated.  No longer need to look for
	nested functions, instead just mark any variables and
	parameters with DECL_NONLOCAL set as having hidden uses.

2003-05-08  Diego Novillo  <dnovillo@redhat.com>

	* version.c (version_string): Change format to show daily
	datestamp and merged date.

2003-05-07  Jeff Law  <law@redhat.com>

	* tree-cfg.c (remove_useless_stmts_and_vars): Do not remove
	the toplevel BIND_EXPR for an inlined function.

	* tree-dfa.c (find_hidden_use_vars): Look at the size of
	VAR_DECLs, not the size of ARRAY_TYPES.  Also make sure
	to reset *inside_vla to its original value when done
	processing any particular VAR_DECL.

2003-05-06  Diego Novillo  <dnovillo@redhat.com>

	* c-simplify.c (simplify_if_stmt): Warn if
	-Wunreachable-code is given and the conditional is always
	true or always false.

	* expr.c (expand_expr): Don't try to expand FUNCTION_DECL
	nodes when processing BIND_EXPR_VARS.

	* varasm.c (output_constant_def_contents): Re-use the
	label when emitting a label for mudflap.

	Disable the following patch:

	2003-04-30  Steven Bosscher  <steven@gcc.gnu.org>

		* ggc-page.c (TREE_EXP_SIZE): Define.
		(extra_order_size_table): New entry for expr trees with
		two operands.

2003-05-06  Jeff Law  <law@redhat.com>

	* tree-cfg.c (make_exit_edges): Fix handling of blocks which
	end with calls.

	* tree-cfg.c (remove_useless_stmts_and_vars): Remove GOTO_EXPRs
	to the immediately following tree node.

	* tree-cfg.c (make_goto_expr_edges): Fix typo in comment.
	(remove_useless_stmts_and_vars): New function.
	* tree-flow.h (remove_useless_stmts_and_vars): Prototype.
	* tree-ssa.c (rewrite_out_of_ssa): After returning to normal
	form, call remove_useless_stmts_and_vars.

2003-05-02  Daniel Berlin  <dberlin@dberlin.org>

	* tree-alias-common.c (alias_get_name): Given unnamed result decls
	a name.
	(create_fun_alias_var): Use DECL_RESULT if available.

2003-05-02  Jeff Law  <law@redhat.com>

	* tree-inline.c (expand_call_inline): Avoid creating naked
	_DECL nodes for inlined functions which had NRV optimizations
	applied.

2003-05-02  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (build_tree_cfg): Update comment.
	(make_blocks): Don't skip over empty statements.
	Move exception handling code ...
	(compute_reachable_eh): ... here.
	(set_parent_stmt): Don't skip over empty statements.
	(bsi_remove): Don't return early on empty statements.
	Don't call STRIP_NOPS.
	(remove_stmt): Don't call STRIP_NOPS.
	Always compute the block holding the statement.
	After replacing the statement with an empty statement, add the
	empty statement to the block.
	(successor_block): Don't call STRIP_NOPS.
	(first_exec_stmt): Likewise.
	(first_exec_block): Don't return early for empty statements.
	(first_stmt): Don't test for NULL blocks.
	Reformat to improve legibility.
	(bsi_next_in_bb): Don't call STRIP_NOPS.
	Reformat to improve legibility.
	(set_bb_for_stmt): Don't ignore empty statements.

	* tree-dfa.c (get_stmt_operands): Don't call STRIP_NOPS.
	(create_stmt_ann): Don't abort on emtpy statements.
	Don't call STRIP_NOPS.
	(copy_stmt): Remove unused function.
	* tree-flow.h (copy_stmt): Remove prototype.

	* tree-flow-inline.h: Don't call STRIP_NOPS.
	Remove local variable 't'.
	(bsi_stmt): Don't return NULL_TREE for empty statements.
	Ignore error_mark_node.

	* tree-iterator.h (tsi_next): Don't call STRIP_NOPS.
	(tsi_stmt_ptr): Likewise.
	(tsi_stmt): Likewise.
	Don't return NULL_TREE for empty statements.

	* tree-pretty-print.c (dump_generic_node): Don't ignore empty
	statements.

	* tree-ssa-ccp.c (fold_stmt): Don't call STRIP_NOPS.
	* tree-ssa-dce.c (find_useful_stmts): Likewise.
	(remove_dead_stmt): Likewise.
	* tree-ssa.c (mark_def_sites): Likewise.
	(rewrite_out_of_ssa): Likewise.
	(rewrite_stmt): Likewise.

	* tree.c (make_ssa_name): Don't ignore empty statements.
	(body_is_empty): Fix comment.

2003-05-01  Jeff Law  <law@redhat.com>

	* tree-dfa.c (find_hidden_use_vars): Renamed from find_vla_decls.
	Now returns a value indicating if nested function was found.
	When nested functions are found, mark suitable variables as
	having hidden uses.
	(find_hidden_use_vars_r): Renamed from find_vla_decls_r.
	(compute_may_alias): Corresponding changes.  Handle
	multiple BLOCKs at the toplevel of a function.

2003-04-30  Diego Novillo  <dnovillo@redhat.com>

	* tree.c (build_empty_stmt): New function.
	* tree.h (IS_EMPTY_STMT): Define.
	(TI_EMPTY_STMT): Remove.
	(empty_stmt_node): Remove.
	Replace 'X = empty_stmt_node' with 'X = build_empty_stmt ()',
	and 'X == empty_stmt_node' with 'IS_EMPTY_STMT (X)' everywhere.
	(build_empty_stmt): Declare.

	* cp/cp-simplify.c (cp_simplify_stmt): Use IS_EMPTY_STMT.

	* java/java-tree.h (build_java_empty_stmt): Declare.
	* java/expr.c (build_java_empty_stmt): New function.
	* java/decl.c (java_init_decl_processing): Don't build empty_stmt_node.
	Replace 'X = empty_stmt_node' with 'X = build_java_empty_stmt ()',
	and 'X == empty_stmt_node' with 'IS_EMPTY_STMT (X)' everwhere.

2003-04-30  Jeff Law  <law@redhat.com>

	* tree-dfa.c (get_expr_operands): Do not ignore operands of an
	an ADDR_EXPR if it is a PARM_DECL or VAR_DECL.

	* tree-dfa.c (get_expr_operands): Look inside operands in
	a TREE_LIST.

2003-04-29  Diego Novillo  <dnovillo@redhat.com>

	* builtins.def (BUILTIN_CONSTANT_P): Mark as constant.

	* tree-dfa.c (get_expr_operands): Do not add VDEF operands for
	dereferenced pointers at call sites.
	* tree-ssa.c (assign_vars): Abort if we couldn't coalesce all the
	versions together.

2003-04-29  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (bsi_start): If there are no stmts in a block, use the
	context pointer to represent the basic block.
	(bsi_insert_after): Handle inserting into empty blocks better.
	(bsi_insert_before): Call bsi_insert_after to handle empty blocks.
	* tree-ssa.c (elim_create): Clear bitmap after its been processed
	instead of during loop.

2003-04-27  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (tree-mudflap.o): Add dependency on $(TREE_DUMP_H).
	* c-decl.c (c_expand_body_1): Don't call simplify_function_tree
	after mudflap_c_function.
	Move mudflap instrumentation after SSA optimizers.
	* tree-dump.c (dump_files): Add entry for -fdump-tree-mudflap.
	* tree.h (enum tree_dump_index): Add TDI_mudflap.
	* doc/invoke.texi: Document -fdump-tree-mudflap.
	* tree-mudflap.c: Include tree-dump.h.
	(dump_file): New local variable.
	(dump_flags): New local variable.
	(mudflap_c_function): Call dump_begin, dump_end and dump_function.
	(mf_decl_cache_locals): Set DECL_CONTEXT for __mf_lookup_shift_l
	and __mf_lookup_mask_l to current_function_decl.
	(mf_offset_expr_of_array_ref): Likewise for __mf_index_X.
	(mf_build_check_statement_for): Re-implement to emit a proper
	STMT_EXPR.
	(mx_xfn_indirect_ref): Emit detailed debugging info if
	-fdump-tree-mudflap-details is given.
	(mudflap_enqueue_decl): Likewise
	* tree-optimize.c (optimize_function_tree): Don't check for
	-fmudflap.

2003-04-26  Diego Novillo  <dnovillo@redhat.com>

	* c-simplify.c (build_bc_goto): If the target label couldn't be
	found, emit an error message.

2003-04-25  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa-live.c (compact_var_map): Add parameter to exclude variables
	with a single SSA version.
	(init_root_var): Allow that a var_map might not be compacted yet.
	* tree-ssa-live.h (compact_var_map): Change Prototype.
	* tree-ssa.c (rewrite_out_of_ssa): When coalescing, don't include single
	reference variables during the compaction.

2003-04-25  Jeff Law  <law@redhat.com>

	* tree-optimize.c (optimize_function_tree): Simplify slightly.

2003-04-25  Andrew MacLeod  <amacleod@redhat.com>

	* tree-ssa.c (struct _elim_graph): Change type of fields
	'pred' and 'succ' to be bitmaps instead of sbitmaps.
	Update all uses.

2003-04-25  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (linearize_cond_expr): Reformat.
	* tree-dfa.c (get_expr_operands): Check for read-only
	status the dereferenced argument pointer, not the pointer
	itself.
	(add_stmt_operand): Always consider global variables as
	virtual operands.

2003-04-24  Jason Merrill  <jason@redhat.com>

	* gimplify.c (simplify_cond_expr): Avoid redundant gimplification.

	Add TREE_VEC of case labels to the SWITCH_EXPR during gimplification.
	* tree.def (CASE_LABEL_EXPR): Add an operand for the LABEL_DECL.
	* tree.h (SWITCH_LABELS, CASE_LABEL): New macros.
	* c-simplify.c (c_simplify_stmt) <CASE_LABEL>: Create LABEL_DECL here.
	* expr.c (expand_expr) <CASE_LABEL_EXPR>: Not here.
	* gimplify.c (gimplify_ctx): Add case_labels field.
	(gimplify_switch_expr, gimple_add_case_label): New fns.
	(simplify_expr): Use them.

2003-04-24  Andrew MacLeod  <amacleod@redhat.com>

	* tree-flow.h (processed_out_of_ssa): Rename to out_of_ssa_tag.
	* tree-ssa-live.c (register_ssa_partition): Add variable to partition.
	(change_partition_var): Use out_of_ssa_tag.
	(create_ssa_var_map): Add all uses, defs and PHI elements to partition.
	(new_tree_live_info): Create a live range info structure.
	(delete_tree_live_info): Free storage.
	(live_worklist): Fill in the live range info for a variable for the
	blocks between the def and all the blocks containing uses.
	(set_if_valid): Set partition bit if variable is in a partition.
	(add_livein_if_notdef): Set live on entry bit for a var's partition
	if a definition has not been seen.
	(calculate_live_on_entry): Create partition live on entry bitmaps for
	all basic blocks .
	(calculate_live_on_exit): Calculate live on exit information for each
	basic block.
	(init_root_var): Initialize and fill in a root_var structure.
	(remove_root_var_partition): remove a partition from a root_var list.
	(delete_root_var): Free storage.
	(dump_root_var): Display root_var summary.
	(dump_var_map): Show extra info for ssa name versions.
	* tree-ssa-live.h (NO_PARTITION): Define.
	(register_ssa_partition): Remove.
	(partition_to_var): Use partition_find after decompressing.
	(var_to_partition): Return NO_PARTITION if var is not in a partition.
	(struct tree_live_info_d): Define live range info structure.
	(partition_is_global): Return 1 if used outside a basic block.
	(live_entry_blocks): Return bitmap over blocks that partition is live
	on entry to.
	(live_on_exit): Return bitmap of partitions live on exit from a block.
	(struct root_var_d): Define a root_var structure.
	(ROOT_VAR_NONE): Define.
	(num_root_vars): Number of variables in root_var object.
	(root_var): Return variable for a root_var index.
	(first_root_var_partition): Return first partition for a root_var.
	(next_root_var_partition): Get next partition for a root_var.
	(find_root_var): Find root_var index for a specific partition.
	* tree-ssa.c (eliminate_extraneous_phis): Remove.
	(set_if_valid): Set partition bit if variable is in a partition.
	(add_conflicts_if_valid): Add conflict between variable and all
	related partitions set in a bitvector.
	(coalesce_ssa_name): Create a conflict graph and coalesce all
	partitions which don't conflict and are related by the same root_var.
	(assign_vars): Use a root_var object, and assign different real
	variables to all partitions.
	(rewrite_out_of_ssa): Call compact_var_map() once, and don't call
	eliminate_extraneous_phis.

2003-04-23  Daniel Berlin  <dberlin@dberlin.org>

	* tree-flow.h (create_global_var): Add prototype.

	* tree-dfa.c (create_global_var): Externalize.

	* tree-alias-common.c: Set DECL_CONTEXT on our temp alias vars.
	(call_may_clobber): Make a copy of this function, since our version
	will be slightly different soon.
	(create_alias_vars): We need global_var, so create it if necessary.

2003-04-23  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (do_proper_save): Remove old code, since the new
	insertion code works okay.
	(pre_expression): Use new_rename_1, it removes a *lot* of useless
	saves.

2003-04-23  Jeff Law  <law@redhat.com>

	* gimplify.c (simplify_target_expr): Make sure to simplify
	the cleanup too.

	* tree-ssa.c (struct def_blocks_d): Add new field phi_insertion_points.
	(compute_global_livein): Accept varray rather than bitmaps.  Callers
	updated.  Rewrite to compute global life information for all the
	objects in the varray in parallel.
	(insert_phis_for_deferred_variables): New function.
	(insert_phi_nodes_for): New argument DEF_MAPs.  When an object
	crosses the threshold for using fully pruned PHI insertions,
	push it on the def_maps varray for deferred processing.
	(insert_phi_nodes): Initialize def_maps.  Pass it to
	insert_phi_nodes_for.  Drain the def_maps varray as it grows.
	Also drain any residual objects in def_maps.  Zero def_maps
	when complete.

2003-04-21  Jeff Law  <law@redhat.com>

	* tree-cfg.c (find_contained_blocks_and_edge_targets): New function.
	(try_finallys): New varray used during edge creation.
	(make_edges): Initialize try_finallys varray.  After creating
	all the "normal" edges, go back and create the special edges
	for the try-finally blocks.
	(make_ctrl_stmt_edges): Create edges for the EH nodes.  Also
	make sure to build the try-finally stack.
	(make_exit_edges): Create edges from calls which may throw
	to any directly reachable exception handlers.
	(is_ctrl_altering_stmt): Statements which may throw alter
	flow control.

	* tree-cfg.c: Include except.h.
	(eh_stack): New file-scoped varray.
	(build_tree_cfg): Initialize eh_stack.
	(make_catch_expr_blocks): New function.
	(make_try_expr_blocks, make_eh_filter_expr_blocks): Likewise.
	(make_blocks): Call new functions as needed.  When ending a block
	due to a statement that may throw, compute the reachable exception
	handlers and store it in the statement's annotation.
	(is_ctrl_stmt): Handle EH nodes.
	(stmt_ends_bb_p): Likewise.
	* tree-flow.h (stmt_ann_d): Add new field reachable_exception_handlers.

	* except.c (check_handled): No longer static.
	* except.h (check_handled): Prototype.

	* c-simplify.c (c_build_bind_expr): Revert change from earlier today.

	* c-common.h (find_reachable_label): Prototype.
	* c-semantics.c (find_reachable_label): No longer static.
	* c-simplify.c (c_build_bind_expr): Avoid creating unnecessary
	BIND_EXPRs.
	(simplify_cleanup): Avoid creating unnecessary TRY_CATCH_EXPRs
	or TRY_FINALLY_EXPRs.
	(simplify_if_stmt): If the condition is constant and the
	unexecuted arm has no reachable code, then just emit
	the executed arm.

2003-04-18  Sebastian Pop  <s.pop@laposte.net>

	* cfghooks.h, cfghooks.c: New files.
	* Makefile.in (BASIC_BLOCK_H): Depends on cfghooks.h.
	(OBJS): Add cfghooks.o.
	(tree-optimize.o): Depends on cfgloop.h.
	(cfghooks.o): New rule.
	* basic-block.h (split_edge): Rename to rtl_split_edge.
	(tree_split_edge): Declare.
	(create_bb): Declare extern here.
	(verify_flow_info): Rename to rtl_verify_flow_info.
	(tree_verify_flow_info): Declare.
	(cfghooks.h): Included here.
	* cfgloop.c (tree.h, tree-flow.h): Included.
	(make_forwarder_block): Renamed to rtl_make_forwarder_block.
	(tree_make_forwarder_block): New static function.
	(blocks_headers): Declared static.
	(HEADER_BLOCK): Use blocks_headers instead of bb's .aux field.
	(redirect_edge_with_latch_update, make_forwarder_block,
	canonicalize_loop_headers): Don't allocate .aux, but makes grow
	the blocks_headers array.
	(canonicalize_loop_headers): Register tree_make_forwarder_block
	into the tree_cfg_hooks and rtl_make_forwarder_block into the
	rtl_cfg_hooks structure.
	(canonicalize_loop_headers): Initialize/free the blocks_headers
	array rather than the bb's .aux field.
	* cfgloopmanip.c (loop_split_edge_with_NULL): New static function.
	(remove_path, force_single_succ_latches):
	Call loop_split_edge_with_NULL instead of loop_split_edge_with.
	* cfgrtl.c (split_block): Update the comment.
	(split_edge): Renamed rtl_split_edge.
	(verify_flow_info): Renamed rtl_verify_flow_info.
	* loop-init.c (loop_optimizer_init, loop_optimizer_finalize):
	Execute code following the value of cfg_level.
	* toplev.c (rest_of_compilation): Call rtl_register_cfg_hooks.
	* tree-cfg.c (create_bb): Declared extern.
	(build_tree_cfg): Call tree_register_cfg_hooks.
	(make_edges, make_exit_edges): Remove the use of EDGE_FALLTHRU.
	(bsi_commit_first_edge_insert): Use split_edge.
	(tree_split_edge, tree_verify_flow_info): New functions.
	* tree-optimize.c (cfgloop.h): Included.
	(optimize_function_tree): Add #if 0'ed calls to
	loop_optimizer_init and loop_optimizer_finalize.

2003-04-16  Jeff Law  <law@redhat.com>

	* Makefile.in (tree-ssa.o): Depend on langhooks.h.
	(tree-dfa.o, tree-cfg.o): Likewise.
	* tree-cfg.c: Include langhooks.h
	(dump_tree_cfg): Revamp how we get the current function's name
	to not rely on current_function_name (and implicitly cfun).
	(dump_cfg_stats, tree_cfg2dot): Likewise.
	* tree-dfa.c: Include langhooks.h
	(dump_immediate_uses): Revamp how we get the current function's name
	to not rely on current_function_name (and implicitly cfun).
	(dump_dfa_stats, dump_alias_info): Likewise.
	* tree-ssa.c: Include langhooks.h
	(dump_tree_ssa): Revamp how we get the current function's name
	to not rely on current_function_name (and implicitly cfun).

	* tree-cfg.c (make_loop_expr_blocks): When determining the value for
	NEXT_BLOCK_LINK, correctly handle empty statement nodes at the
	end of the tree.
	(make_cond_expr_blocks, make_switch_expr_blocks): Likewise.
	(make_bind_expr_blocks): Likewise.

	* gimplify.c (keep_function_tree_in_gimple_form): Move check of
	flag_disable_simple here.  Include flags.h.
	* Makefile.in (gimplify.o): Depends on flags.h
	* c-decl.c (c_expand_body_1): No longer check flag_disable_simple.
	* tree-inline.c (copy_body_r): Avoid creating non-gimple code
	when inlining a function where the RESULT_DECL's initialization
	is not on the RETURN_EXPR.

2003-04-15  Jeff Law  <law@redhat.com>

	* tree-flow.h (struct var_ann_d): Renamed is_vla_decl field to
	has_hidden_use.
	(has_hidden_use, set_has_hidden_use): Renamed from is_vla_decl
	and set_vla_decl.
	* tree-flow-inline.h (has_hidden_use): Renamed from is_vla_decl.
	Updated to use "has_hidden_use" instead of "is_vla_decl" field.
	(set_has_hidden_use): Renamed from set_vla_decl.
	Updated to use "has_hidden_use" instead of "is_vla_decl" field.
	* tree-dfa.c (dump_variable): Corresponding changes.
	(find_vla_decls_r): Likewise.
	* c-simplify.c (simplify_decl_stmt): Likewise.
	* tree-ssa-dce.c: Likewise.

2003-04-09  Jeff Law  <law@redhat.com>

	* tree-dfa.c (struct alias_set_d, field tag_sym_set): Remove
	unused field.
	(register_alias_set): Rework to avoid incorrect coalescing of
	entries.  Fix memory leak.  No longer set field tag_sym_set.
	(get_expr_operands): ADDR_EXPR expressions may have interesting
	operands in some cases.

2003-04-09  Diego Novillo  <dnovillo@redhat.com>

	* gimplify.c (simplify_expr): Handle VECTOR_CST nodes.
	* tree-cfg.c (make_blocks): Ignore empty statement containers.
	Create a basic block before processing containers that only have
	empty statements.
	(make_loop_expr_blocks): Use the container instead of the statement
	when setting NEXT_BLOCK_LINK.
	(make_cond_expr_blocks): Likewise.
	(make_switch_expr_blocks): Likewise.
	(make_bind_expr_blocks): Likewise.
	(successor_block): If the last statement of the block is the empty
	statement, use its container to get NEXT_BLOCK_LINK.
	(stmt_starts_bb_p): Return false if the statement is NULL.
	* tree-pretty-print.c (dump_generic_node): Handle VECTOR_CST nodes.
	* tree-simple.c (is_simple_const): Accept VECTOR_CST as constants.
	* objc/objc-lang.c (LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P):
	Define.

2003-04-06  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (remove_bb): Call ssa_remove_edge.
	(cleanup_cond_expr_graph): Likewise.
	(cleanup_switch_expr_graph): Likewise.
	(disconnect_unreachable_case_labels): Likewise.
	(merge_tree_blocks): Likewise.
	Update PHI nodes at BB2's successor.
	(dump_tree_bb): Show PHI nodes in the block.
	* tree-dfa.c (add_phi_arg): Update comment.
	(remove_phi_arg_num): New function.
	(remove_phi_arg): Call it.
	Move from tree-ssa.c.
	(remove_phi_node): Move from tree-ssa.c.
	* tree-flow.h (ssa_make_edge): Declare.
	(ssa_remove_edge): Declare.
	* tree-pretty-print.c (dump_generic_node): Show block where PHI
	arguments are coming from.
	* tree-ssa-dce.c (pdom_info): New local variable.
	(remove_dead_stmts): Initialize it and free it at the end.
	(remove_conditional): New function.
	(remove_dead_stmt): Call it.
	* tree-ssa.c (eliminate_phi): If the edge index is -1, abort
	compilation.
	(ssa_remove_edge): New function.
	(ssa_make_edge): New function.

2003-04-06  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (push_bsi): New. Push a block_stmt_iterator onto a stack.
	(pop_bsi): New. Pop a block_stmt_iterator off a stack.
	* tree-flow-inline.h (struct bsi_list_d): Block iterator stack struct.
	(new_bsi_list): Start a new bsi stack.
	(empty_bsi_stack): Is stack empty.
	(FOR_EACH_BSI_IN_REVERSE): Macro for processing bsi's in reverse.
	(FOR_EACH_STMT_IN_REVERSE): Macro for processing stmt's in reverse.

2003-04-06  Andreas Jaeger  <aj@suse.de>

	* treelang/treetree.c (tree_code_create_function_initial): Replace
	calls to non-existent function annotate_with_file_line_column with
	calls to annotate_with_file_line.
	(tree_code_create_variable): Likewise.

2003-04-05  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (get_expr_operands): Do not clobber readonly operands
	in CALL_EXPRs.
	(find_vars_r): Likewise.
	(add_indirect_ref_var): When creating new INDIRECT_REF variables,
	copy the readonly attribute from the variable's type.

2003-04-05  Diego Novillo  <dnovillo@redhat.com>

	* tree.c (copy_node): Never copy tree annotations.

2003-04-05  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-ccp.c (visit_cond_stmt): Don't short circuit evaluation
	of UNDEFINED conditional expressions.

2003-04-04  Andrew MacLeod  <amacleod@redhat.com>

	* Makefile.in : Add tree-ssa-live.c and tree-ssa-live.h files.
	* tree-ssa.c (struct _var_map, create_var_map, delete_var_map,
	var_from_partition, get_var_partition, mapped_var_from_ref,
	compact_var_map, dump_tree_partition, set_partition_for_var,
	set_var_mapping, create_var_partition): Remove.
	(create_temp): Allow temps to be created from SSA_NAME vars as well.
	(eliminate_name, eliminate_build, elim_backward, elim_create,
	eliminate_phi): Use new var map interface.
	(coalesce_ssa_name): New. Coalesce ssa_name ranges together.
	(assign_vars): Assign real variables to ssa_name partitions.
	(rewrite_out_of_ssa): Use new varmap partition and routines.
	* tree-ssa-live.h: New file
	(var_map): Structure for variable map.
	(num_var_partitions): Number of partitions.
	(partition_to_var): Return variable for partition.
	(var_to_partition): Return partition variable is in.
	(var_to_partition_to_var): Return variable representing partition
	another variable is in.
	(register_ssa_partition): Initialize a partition element as used.
	* tree-ssa-live.c: New file.
	(init_var_map): Initialize a var_map.
	(delete_var_map): Free storage for a var_map.
	(var_union): Combine 2 partitions.
	(compact_var_map): Reduce the number of partitions in a var_map.
	(change_partition_var): Assign a specific var to a partition.
	(create_ssa_var_map): Initialize a var_map with referenced variables.
	(dump_var_map): Debug output for a var_map.

2003-04-03  Diego Novillo  <dnovillo@redhat.com>

	* fold-const.c (fold_relational_hi_lo): Add missing comparison when
	folding comparisons to signed_max+1.

2003-04-02  Jason Merrill  <jason@redhat.com>
	    Diego Novillo  <dnovillo@redhat.com>

	* tree-inline.c (initialize_inlined_parameters): Cast argument
	types appropriately when emitting initialization assignments.

2003-04-01  Andrew MacLeod  <amacleod@redhat.com>

	* tree-cfg.c (PENDING_STMT, SET_PENDING_STMT): New Macros.
	(bsi_insert_on_edge): Rename to bsi_commit_first_edge_insert. Add an
	empty annotation record to the new basic_block.
	(bsi_commit_edge_inserts): New. Commit all pending edge inserts.
	(bsi_insert_on_edge): New. Add stmt to edge's pending insert list.
	* tree-flow-inline.h (phi_arg_from_edge): Return PHI index for an edge.
	(phi_element_for_edge): Return PHI element for an edge.
	* tree-flow.h (struct var_ann_d): Add auxiallary field and new
	bit 'processed_out_of_ssa'.
	* tree-ssa.c (_var_map): Structure for variable parition map.
	(struct _elim_graph): Elimination graph for out-of-ssa pass.
	(create_var_map): Create a new var_map.
	(delete_var_map): Delete a var_map.
	(var_from_parition): Return var for a specified partition.
	(get_var_partition): Return partition a var belongs to.
	(mapped_var_from_ref): Get root var for a var's partition.
	(compact_var_map): Re-map the partitions to make the list dense.
	(dump_var_parition): Print var_map.
	(set_partition_for_var): Associate a real var with a partition.
	(set_var_mapping): Associate an SSA version var with a real var.
	(create_var_partition): Create a partition for processing.
	(create_temp): Create a new temp variable for a partition.
	(insert_copy_on_edge): Insert a copy between variables on an edge.
	(new_elim_graph): Create a new elimination graph.
	(clear_elim_graph): clear an elimination graph.
	(delete_elim_graph): Delete an elimination graph.
	(eliminate_name, eliminate_build, elim_forward,
	elim_unvisited_predecessor, elim_backward, elim_create,
	eliminate_phi): Routines to implement Morgans PHI elimination algorithm.
	(eliminate_extraneous_phis): Eliminate PHI nodes which will never
	generate code.
	(rewrite_out_of_ssa): Use partitions and PHI elimination algorithm.

2003-04-01  Jeff Law  <law@redhat.com>

	* tree-cfg.c (make_blocks): Make sure the BIND_EXPR's subgraph
	actually ended in a statement before seeing of the statement should
	end a basic block.

	* tree-cfg.c (dump_tree_cfg): Avoid crashing when cfun is NULL.
	(tree_cfg2dot): Likewise.
	* tree-dfa.c (dump_immediate_uses): Likewise.
	* tree-pretty-print.c (dump_generic_node): Dump the EH_FILTER_FAILURE
	nodes attached to an EH_FILTER_EXPR.

	* tree-dfa.c (get_stmt_operands): Add cases for TRY_FINALLY_EXPR,
	TRY_CATCH_EXPR, CATCH_EXPR and EH_FILTER_EXPR.
	(get_expr_operands): Add case for EXC_PTR_EXPR.

	* tree-dfa.c (compute_may_aliases): Accept FNDECL as an argument.
	Use FNDECL instead of relying on CURRENT_FUNCTION_DECL.
	* tree-flow.h (compute_may_aliases): Update prototype.
	* tree-ssa.c (rewrite_into_ssa): Corresponding changes.

	* tree-inline.c (expand_calls_inline): Correctly handle EH_FILTER_EXPR.

2003-03-31  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (STRICT_WARN, STRICT2_WARN): Remove -Wtraditional.
	* timevar.def (TV_TREE_CLEANUP_CFG): Define.
	* tree-cfg.c (set_parent_stmt): Add documentation.
	(replace_stmt): New function.
	(merge_tree_blocks): New function.
	(remap_stmts): New function.
	(linearize_cond_expr): New function.
	(linearize_control_structures): New function.
	(cleanup_tree_cfg): Call it.
	Use new timevar TV_TREE_CLEANUP_CFG.
	(remove_bb): Update debugging message.
	Make sure that bb->head_tree_p and bb->end_tree_p exist before
	resetting their basic blocks.
	(remove_stmt): When removing a control flow expression, update
	basic block flags.
	(cleanup_control_flow): Make sure that the block contains
	statements.
	(last_stmt): Reformat for readability.
	(last_stmt_ptr): Return NULL if the block has no statements.
	* tree-flow-inline.h (parent_block): Check that the block is not
	empty.
	* tree-flow.h (bb_empty_p): Remove.
	* tree-inline.c (copy_tree_r): Do not copy empty_stmt_node.
	* tree-ssa-dce.c (tree_ssa_dce): Call cleanup_tree_cfg.
	* tree.c (body_is_empty): New function.
	* tree.h (body_is_empty): Declare.

2003-03-31  Jeff Law  <law@redhat.com>

	* tree-ssa-ccp.c (simulate_block): Add abnormal edges out of a
	block to the edge worklist after simulating a block for the
	first time.  If the block has a single outgoing normal edge,
	add that edge to the worklist after simulating the block for
	the first time.

2003-03-31  Frank Ch. Eigler  <fche@redhat.com>

	* gcc.c (MFLIB_SPEC): Remove -ld.
	(MFWRAP_SPEC): Remove dlopen wrapping.

2003-03-28  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa.c (rewrite_block): Add new argument 'eq_expr_value'.
	Update all users.
	If 'eq_expr_value' is given, use it to register a new
	value for the variable given on the LHS.
	If the block ends in a conditional expression of the form 'X == Y',
	propagate 'X = Y' into the THEN_CLAUSE.
	(MAY_COPYPROP_P): Define.
	(rewrite_stmt): Call it.
	(register_new_def): Fix comment.
	(get_eq_expr_value): New function.

2003-03-28  Diego Novillo  <dnovillo@redhat.com>

	* basic-block.h (BB_COMPOUND_ENTRY): Remove.  Update all users
	everywhere.
	* tree-cfg.c: Minor fixes to various comments.
	* tree-optimize.c (optimize_function_tree): Dump optimized function
	after SSA->normal conversion.

2003-03-26  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c:  Implement open64 renaming algorithm.
	(subst_phis): New function.
	(generate_expr_as_of_bb): Ditto.
	(new_rename_1): Ditto.
	(process_delayed_rename): Ditto.
	(do_proper_save): Use bsi_* functions for insertion, don't remove
	old code quite yet, haven't fully tested.
	Also add argument that says whether to insert before use or after use.
	(defs_y_dom_x): Factor through injuries properly.
	(defs_match_p): Ditto.
	(phi_opnd_from_res): Attempt to fix, and remove useless argument.
	(reset_can_be_avail): Fix broken condition that would cause infinite
	loop.
	(update_old_new): #if 0 updating of bb heads.
	(finalize_1): We occasionally get 5 + a rather than a + 5, so we
	need to make sure 5 is a DECL before trying to get a reaching def.
	(repair_use_injury): If we couldn't find a reaching def, we don't need
	to repair it.
	(assign_new_class): Only push to stack2 if it exists (so we can
	share this function in both rename implementations).
	(create_ephi_node): Add argument that says whether to add ephi
	to block or not (we create them sometimes for validation only).
	(tree_perform_ssapre): Skip expressions without any uses.

	* tree.h: Add EREF_DELAYED_RENAME.
	(struct tree_eref_common): Add delayed_rename bit.

2003-03-25  Diego Novillo  <dnovillo@redhat.com>

	* tree-simple.c: Use tree codes to document grammar for relational
	operators &&, || and ^.

2003-03-25  Diego Novillo  <dnovillo@redhat.com>

	* cfg.c (dump_edge_info): Add labels for EDGE_TRUE_VALUE,
	EDGE_FALSE_VALUE and EDGE_EXECUTABLE.
	* tree-cfg.c (dump_tree_bb): Change formatting.  Show all
	statements in the block.
	* tree-simple.c: Update documentation for GIMPLE conditional
	expressions.

2003-03-24  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (get_expr_operands): If there are no call clobbered
	variables, don't create a VDEF for GLOBAL_VAR at clobbering
	CALL_EXPRS.
	* tree-flow.h (fold_stmt): Declare.
	* tree-ssa-ccp.c (fold_stmt): Change to extern declaration.
	* tree-ssa.c (rewrite_stmt): Call it.

2003-03-22  Diego Novillo  <dnovillo@redhat.com>

	* Makefile.in (gtype-desc.o): Add dependency on $(TREE_FLOW_H).

	* tree-dfa.c (struct alias_set_d): Add field 'num_elements'.
	(struct walk_state): Move declaration earlier in the file.
	(create_global_var): New local function.
	(num_referenced_vars, num_aliased_objects): Change type to
	'size_t'.  Update all users.
	(aliased_objects, aliased_objects_base, aliased_objects_aliase_set):
	Mark for garbage collection.
	(num_call_clobbered_vars, call_clobbered_vars): New global
	variable.
	(get_expr_operands): For CALL_EXPRs, add a VUSE or VDEF reference
	for every pointer argument.  If the call may clobber, add a VDEF,
	otherwise add a VUSE.
	If the call may clobber, add VDEF for GLOBAL_VAR.
	(dump_variable): Show whether the variable is call clobbered.
	(dump_dfa_stats): Show call clobbered variables.
	(compute_may_aliases): Minor formatting changes.
	(compute_alias_sets): If the function makes clobbering calls, add
	GLOBAL_VAR as an alias to every call-clobbered variable.
	Remove alias sets that have exactly one element.
	(register_alias_set): Set 'num_elements' to zero for every newly
	created alias set.
	(find_alias_for): Don't make a second call to add_may_alias to make
	alias tags alias themselves.  It's redundant.
	Increment 'num_elements' when adding a new alias to an alias set.
	(may_alias_p): Don't handle GLOBAL_VAR.
	Check for structure aliasing when either PTR or VAR are a
	structure.  Don't do it only when both are structures.
	(dump_alias_info): Show all aliases of each variable.
	(find_vars_r): When processing a CALL_EXPR node, set
	walk_state->is_store if the function may clobber and create a
	reference to GLOBAL_VAR.
	(add_indirect_ref_var): Change type of second argument from 'void *'
	to 'struct walk_state *'.  Update all users.
	(add_referenced_var): Likewise.  If a potentially aliased variabe
	is not declared 'const', add it to the list of call clobbered
	variables.

	* tree-flow.h (struct var_ann_d): Add field 'is_call_clobbered'.
	Change type of field 'uid' to size_t.  Update all users.
	(stmt_ann_d): Add field 'makes_clobbering_call'.
	(next_tree_ref_id): Remove unused variable.
	(call_clobbered_vars): Declare.
	(num_call_clobbered_vars): Declare.
	(call_clobbered_var): New inline function.

	* tree-ssa-ccp.c (visit_phi_node): If the LHS of a PHI node is
	volatile, mark the PHI node VARYING without checking its arguments.
	(visit_assignment): Likewise.
	(set_value): Remove.  Update all users.
	(likely_value): If the statement makes aliased loads or has
	volatile operands, consider it VARYING.
	(get_default_value): If a variable is volatile, consider it
	VARYING.

	* tree-ssa.c (init_tree_ssa): Initialize num_call_clobbered_vars
	and call_clobbered_vars.
	Do not create GLOBAL_VAR.  Set it to NULL_TREE.
	Increase initial size for various hash tables.
	(delete_tree_ssa): Reset num_call_clobbered_vars and
	call_clobbered_vars.
	(get_reaching_def): Rename from currdef_for.  Update all users.
	Always create default definitions for variables that need them.
	Callers that use to call currdef_for with the second argument set
	to false now call get_value_for.
	(htab_statistics): New function.
	(dump_tree_ssa): Call it.
	(avail_expr_eq): Also compare VUSE operands.

2003-03-21  Jeff Law  <law@redhat.com>

	* tree-dfa.c: Revert vla changes from yesterday.
	(find_vla_decls_r): Do not look inside TYPE_DECLs.

2003-03-20  Jeff Law  <law@redhat.com>

	* gimplify.c (simplify_return_expr): Tighten condition for
	converting the RHS of a MODIFY_EXPR in a RETURN_EXPR to a
	simple_val.  Allow returning a RESULT_DECL directly.
	* tree-dfa.c (get_expr_operands): A RESULT_DECL can have
	interesting operands.
	(clobber_vars_r): Handle RESULT_DECLs.
	(compute_may_aliases): Initialize and free vla_htab.
	(find_vla_decls): Pass vla_htab to walk_tree.
	(find_vla_decls_r): Likewise.
	* tree.h (SSA_DECL_P): Accept RESULT_DECLs.

2003-03-19  Jeff Law  <law@redhat.com>

	* gimplify.c (simplify_return_expr): Only allow simple values
	on the RHS of a MODIFY_EXPR appearing in a RETURN_EXPR.
	* tree-cfg.c (make_exit_edges): We no longer need to look for
	CALL_EXPRs on the RHS of a MODIFY_EXPR inside RETURN_EXPRs.

2003-03-18  Andrew Macleod  <amacleod@redhat.com>

	* tree-cfg.c (make_blocks): Use append_stmt_to_bb. Check for NULL
	tsi_stmt when deciding whether to start a new block.
	(add_stmt_to_bb): Don't update the basic block end pointer.
	(append_stmt_to_bb): New. Add stmt and update the BB end pointer.
	(first_stmt): Use only 1 return.
	(last_stmt): Modified to use bsi_last().
	(last_stmt_ptr): Modified to use bsi_last().
	(bsi_last): New. Return an iterator to the last stmt in a block.
	(bsi_from_tsi): Fix bug which wouldn't set the context properly when
	within a nested BIND_EXPR.
	(bsi_update_from_tsi): Insert helper which is more efficient than
	bsi_from_tsi().
	(bsi_link_after): link in a new stmt and update the basic block
	data structures.
	(bsi_insert_after): Insert a new stmt into a block.
	(bsi_insert_before): Insert a new stmt into a block.
	(bsi_insert_on_edge): Insert a new stmt on an edge.
	* tree-flow-inline.h (is_label_stmt): Return true if stmt can be a
	target of a control transfer.
	* tree-flow.h (is_label_stmt, bsi_last): New prototypes.

2003-03-12  Jeff Law  <law@redhat.com>

	* c-simplify.c (simplify_switch_stmt): Save the type of the original
	condition in TREE_TYPE (SWITCH_EXPR (...)).  Annotate the SWITCH_EXPR
	with file/line information.
	* expr.c (expand_expr, case SWITCH_EXPR): Use expand_end_case_type.
	* tree.def (SWITCH_EXPR): Document meaning of TREE_TYPE field of
	the SWITCH_EXPR.

	* c-simplify.c (simplify_block): Set the current line number to
	the line associated with the end of the block.

	* c-decl.c (finish_function): No longer save/restore the
	current filename or linenumber around simplification.  Instead
	save/restore it around inlining.
	(c_expand_body_1): Save/restore current filename and linenumber
	around expansion of trees into RTL.
	* gimplify.c (simplify_function_tree): Make the current file/line
	number match the non-gimple code at the end of a function.

	* tree-cfg.c: Include toplev.h.
	(remove_bb): Warn about unreachable code.

	* cfgrtl.c (verify_flow_info): Ignore EDGE_EXECUTABLE, it's for
	the CCP optimizer only.

	* ssa.c (convert_to_ssa): Use last_basic_block, not n_basic_blocks.

2003-03-11  Jeff Law  <law@redhat.com>

	* builtins.c: Fix minor comment typo.
	(expand_builtin_strcmp, expand_builtin_strncmp): Remove.
	(expand_builtin_strcat, expand_builtin_strncat): Likewise.
	(expand_builtin_strspn, expand_builtin_strcspn): Likewise.
	(expand_builtin_strcopy, expand_builtin_strstr): Likewise.
	(expand_builtin_strpbrk, expand_builtin_strchr): Likewise.
	(expand_builtin_strrchr, expand_builtin_fputs): Likewise.
	(simplify_builtin_memcmp, simplify_builtin_strcmp): New functions.
	(simplify_builtin_strpbrk, simplify_builtin_strstr): Likewise
	(simplify_builtin_strchr, simplify_builtin_strrchr): Likewise
	(simplify_builtin_strcpy, simplify_builtin_strncpy): Likewise
	(simplify_builtin_strncmp, simplify_builtin_strcat): Likewise
	(simplify_builtin_strncat, simplify_builtin_strspn): Likewise
	(simplify_builtin_strcspn, simplify_builtin_fputs): Likewise
	(expand_builtin_memcmp): Use simplify_builtin_memcmp.
	(simplify_builtin): New function
	(expand_builtin): Use simpify_builtin to collapse several common
	cases together.
	* gimplify.c (simplify_call_expr): Accept new argument.  All
	callers updated.  Call simplify_builtin to try and simplify builtin
	function calls before we simplify their arguments.
	* tree.h (simplify_builtin): Prototype.

2003-03-11  Jeff Law  <law@redhat.com>

	* timevar.def (TV_TREE_SSA_TO_NORMAL): New timevar.
	* tree-cfg.c (remove_stmt): Also remove special annotations
	on RHS of MODIFY_EXPR statements.
	* tree-dfa.c (create_stmt_ann): Update comments.  Fix formatting.
	(compute_may_aliases): Make sure timevar encloses entire routine.
	* tree-ssa.c (rewrite_out_of_ssa): Enclose with a timevar.
	(remove_annotations_r): Avoid walking into subtrees of anything
	except container nodes.  Remove the special annotation on the
	RHS of MODIFY_EXPRs.

2003-03-10  Frank Ch. Eigler  <fche@redhat.com>

	* tree-mudflap.c (mx_xfn_indirect_ref): Allow unfolded "& ptr->field"
	constructs to pass uninstrumented.  Remove TREE_ADDRESSABLE settings.
	Keep array accesses to non-ADDRESSABLE objects uninstrumented.  Update
	__MF_TYPE_* constants for __mf_register calls.

2003-03-10  Jeff Law  <law@redhat.com>

	* c-decl.c (c_expand_body_1): Update comments relating to
	re-simplification after mudflap instrumentation.  Avoid
	unnecessary simplification of the function tree.
	* gimplify.c (keep_function_tree_in_gimple_form): New function.
	* tree-inline.c: Include tree-iterator.h and tree-simple.h
	(struct inline_data): Add new TSI field.
	(copy_body_r): Keep tree in gimple form when transforming a
	RETURN_EXPR into a MODIFY_EXPR and GOTO_EXPR.
	(initialize_inlined_parameters): Use MODIFY_EXPR, not INIT_EXPR
	for initialization of inlined parameters.
	(expand_call_inline): Save and restore the TSI around the
	call to expand_calls_inline.  Keep the tree in gimple form
	when replacing a CALL_EXPR with a BIND_EXPR for the inlined
	body.
	(expand_calls_inline): Revamp to provide the current TSI to
	expand_call_inline when we're working with gimple form.
	* Makefile.in (tree-inline.o): Update dependencies.
	* tree.h (keep_function_tree_in_gimple_form): Prototype.

2003-03-10  Andrew MacLeod  <amacleod@redhat.com>

	* Makefile.in (tree.o): Add tree-iterator.h dependancy.
	* sbitmap.c (sbitmap_realloc): Grow a sbitmap structure.
	* sbitmap.h (sbitmap_realloc): New Prototype.
	* tree-cfg.c (remove_bb): Use new format for bsi_remove.
	(bsi_remove): Update iterator to refer to the next stmt.
	(bsi_prev): Implement previous stmt routine.
	(bsi_from_tsi): Create a block iterator from a tree iterator.
	* tree-flow-inline.h (bsi_prev): Remove.
	(tsi_from_bsi): Create a tree iterator from a block iterator.
	* tree-flow.h (bsi_prev,bsi_remove): Update prototypes.
	(bsi_from_tsi, tsi_from_bsi, bsi_insert_*): New prototypes.
	(bsi_iterator_update): New enum type.
	* tree-iterator.h (tree_stmt_anchor, tsi_iterator_update): New type.
	(tsi_link_before, tsi_link_after, tsi_delink, tsi_new_stmt_list,
	tsi_stmt_list_head): New prototypes.
	* tree-ssa-dce.c (remove_dead_stmts): Update removal loop to allow
	that remove_dead_stmt update's the iterator.
	(remove_dead_stmt): Use a pointer to the iterator since bsi_remove
	requires it.
	* tree.c (tsi_link_before): New function to link a stmt before an
	iterator.
	(tsi_link_after): New function links stmt after an iterator.
	(tsi_delink): Removes a stmt from a list.
	(tsi_new_stmt_list): New function to begin a new stmt list.
	(tsi_stmt_list_head): New function to get the first stmt in a list.

2003-03-07  Diego Novillo  <dnovillo@redhat.com>

	* tree-cfg.c (remove_stmt): Don't assume that the statement is in
	SSA form.

	* tree-flow.h (dump_tree_ssa_stats): Declare.
	(debug_tree_ssa_stats): Declare.
	(stmt_ann_d): Add new statement flags 'makes_aliased_loads',
	'makes_aliased_stores', and 'has_volatile_ops'.
	* tree-dfa.c (add_stmt_operand): Set new statement flags accordingly.

	* tree-pretty-print.c (dump_generic_node): Various cosmetic changes
	to the rendering of some expressions.

	* tree-ssa.c (struct var_value_d): Rename from struct currdef_d.
	Rename field 'currdef' to 'value'.  Update all users.
	(avail_exprs): New local hash table.
	(const_and_copies): New local hash table.
	(struct ssa_stats_d): Declare.
	(ssa_stats): New local variable.
	(rewrite_into_ssa): Deallocate avail_exprs and const_and_copies
	after renaming.
	Call dump_tree_ssa_stats() if -fdump-tree-ssa-stats is given.
	(rewrite_block): Document the renaming process.
	Add new local stack block_avail_exprs to keep track of expressions
	made available in this block and its children.
	(rewrite_stmts): Move body inside rewrite_block.
	(dump_tree_ssa_stats): New function.
	(debug_tree_ssa_stats): New function.
	(get_def_blocks): New function.
	(insert_phi_nodes_for): Call it.
	(rewrite_stmt): Add support for keeping track of copies, constants
	and globally redundant expressions.
	(rewrite_operand): If a pointer has been copy propagated into
	another one, rewrite INDIRECT_REF nodes of the original pointer to
	refer to the new one.
	(register_new_def): Add new argument 'var' indicating which
	variable is this new definition for.  Update all users.
	(update_indirect_ref_vuses): New function.
	(update_pointer_vuses): New function.
	(init_tree_ssa): Set variable 'ssa_stats' to zero.
	Allocate memory for 'avail_exprs' and 'const_and_copies'.
	(currdef_for): Don't mark inline.
	Call get_value_for and set_value_for.
	(set_currdef_for): Remove.  Update all users.
	(var_value_hash): Rename from currdef_hash.  Update all users.
	(var_value_eq): Rename from currdef_eq.  Update all users.
	(get_value_for): New function.
	(set_value_for): New function.
	(lookup_avail_expr): New function.
	(avail_expr_hash): New function.
	(avail_expr_eq): New function.
	(get_def_blocks_for): New function.
	(var_is_live): New function.

2003-03-06  Diego Novillo  <dnovillo@redhat.com>

	* tree-ssa-ccp.c (likely_value): Don't assume CONSTANT if the
	statement has virtual uses.

2003-03-05  Diego Novillo  <dnovillo@redhat.com>

	* tree-dfa.c (opf_none, opf_is_def, opf_force_vop, opf_ignore_bp):
	New flags to alter the behavior of add_stmt_operand.
	(get_expr_operands): Change operand IS_DEF with FLAGS.  Update all
	users.
	When adding a VUSE for pointer dereferences in function arguments,
	don't add a superfluous VUSE for the base pointer.
	(add_stmt_operand): Remove operands IS_DEF and FORCE_VOP.  Add
	operand FLAGS.  Update all users.

2003-03-05  Jason Merrill  <jason@redhat.com>

	* c-pretty-print.c (do_niy): Only print operands of expressions.
	* tree-pretty-print.c: Likewise.

	* c-simplify.c (simplify_decl_stmt): Only simplify DECL_SIZE_UNIT.