2020-02-12  Jason Merrill  <jason@redhat.com>

	PR c++/92583
	PR c++/92654
	* tree.c (cp_walk_subtrees): Walk CONSTRUCTOR types here.
	* pt.c (find_parameter_packs_r): Not here.

2020-02-12 Iain Sandoe <iain@sandoe.co.uk>

	* coroutines.cc (build_actor_fn): Implement deallocation function
	selection per n4849, dcl.fct.def.coroutine bullet 12.
	(morph_fn_to_coro): Implement allocation function selection per
	n4849, dcl.fct.def.coroutine bullets 9 and 10.

2020-02-12  Marek Polacek  <polacek@redhat.com>

	PR c++/93684 - ICE-on-invalid with broken attribute.
	* parser.c (cp_parser_std_attribute): Peek a token first before
	consuming it.

2020-02-11  Jason Merrill  <jason@redhat.com>

	PR c++/93675
	* class.c (add_implicitly_declared_members): Use do_friend.
	* method.c (implicitly_declare_fn): Fix friend handling.
	(decl_remember_implicit_trigger_p): New.
	(synthesize_method): Use it.
	* decl2.c (mark_used): Use it.

2020-02-11  Jason Merrill  <jason@redhat.com>

	PR c++/93650
	PR c++/90691
	* constexpr.c (maybe_constant_value): Correct earlier change.
	(cxx_eval_binary_expression) [SPACESHIP_EXPR]: Pass lval through.
	* method.c (genericize_spaceship): Wrap result in TARGET_EXPR.

2020-02-12  Patrick Palka  <ppalka@redhat.com>

	PR c++/69448
	PR c++/80471
	* type-utils.h (find_type_usage): Refactor to take a tree * and to
	return a tree *, and update documentation accordingly.
	* pt.c (make_auto_1): Set AUTO_IS_DECLTYPE when building a
	decltype(auto) node.
	(make_constrained_decltype_auto): No need to explicitly set
	AUTO_IS_DECLTYPE anymore.
	(splice_late_return_type): Use find_type_usage to find and
	replace a possibly nested auto node instead of using is_auto.
	Check test for is_auto into an assert when deciding whether
	to late_return_type.
	(type_uses_auto): Adjust the call to find_type_usage.
	* parser.c (cp_parser_decltype): No need to explicitly set
	AUTO_IS_DECLTYPE anymore.

	* error.c (dump_decl) [CONCEPT_DECL]: Use dump_simple_decl.
	(dump_simple_decl): Handle standard concept definitions as well as
	variable concept definitions.

2020-02-10  Jakub Jelinek  <jakub@redhat.com>

	PR other/93641
	* error.c (dump_decl_name): Fix up last argument to strncmp.

2020-02-10  Jason Merrill  <jason@redhat.com>

	PR c++/93618
	* tree.c (array_of_unknown_bound_p): New.
	* init.c (perform_member_init): Do nothing for flexible arrays.

2020-02-09  Jakub Jelinek  <jakub@redhat.com>

	PR c++/93633
	* constexpr.c (cxx_eval_constant_expression): If obj is heap var with
	ARRAY_TYPE, use the element type.  Punt if objtype after that is not
	a class type.

2020-02-08  Jason Merrill  <jason@redhat.com>

	PR c++/90691
	* expr.c (fold_for_warn): Call maybe_constant_value.
	* constexpr.c (struct constexpr_ctx): Add uid_sensitive bit-field.
	(maybe_constant_value): Add uid_sensitive parm.
	(get_fundef_copy): Don't copy if it's true.
	(cxx_eval_call_expression): Don't instantiate if it's true.
	(cxx_eval_outermost_constant_expr): Likewise.

	PR c++/92852
	* constexpr.c (maybe_constant_value): Don't unshare if the cached
	value is the same as the argument.

	* typeck.c (maybe_warn_about_returning_address_of_local): Add
	location parameter.

	* typeck2.c (process_init_constructor): Also clear TREE_SIDE_EFFECTS
	if appropriate.

2020-02-08  Jakub Jelinek  <jakub@redhat.com>

	PR c++/93549
	* constexpr.c (find_array_ctor_elt): If last element has no index,
	for flag_checking verify all elts have no index.  If i is within the
	elts, return it directly, if it is right after the last elt, append
	if NULL index, otherwise force indexes on all elts.
	(cxx_eval_store_expression): Allow cep->index to be NULL.

2020-02-07  Marek Polacek  <polacek@redhat.com>

	PR c++/92947 - Paren init of aggregates in unevaluated context.
	* call.c (build_new_method_call_1): Don't check
	cp_unevaluated_operand.  Check the return value of digest_init.

2020-02-06  Jason Merrill  <jason@redhat.com>

	PR c++/92654
	* tree.c (cp_walk_subtrees): Walk into type template arguments.
	* cp-tree.h (TYPE_TEMPLATE_INFO_MAYBE_ALIAS): Use typedef_variant_p
	instead of TYPE_ALIAS_P.
	* pt.c (push_template_decl_real): Likewise.
	(find_parameter_packs_r): Likewise.  Remove dead code.
	* error.c (find_typenames_r): Remove dead code.

2020-02-06  Jason Merrill  <jason@redhat.com>

	PR c++/92517
	* parser.c (cp_parser_constraint_primary_expression): Do the main
	parse non-tentatively.

2020-02-06  Marek Polacek  <polacek@redhat.com>

	PR c++/93597 - ICE with lambda in operator function.
	* name-lookup.c (maybe_save_operator_binding): Check is_overloaded_fn.

2020-02-05  Jason Merrill  <jason@redhat.com>

	PR c++/93140
	* pt.c (tsubst_decl) [PARM_DECL]: Check cp_unevaluated_operand in
	handling of TREE_CHAIN for empty pack.

2020-02-05  Jakub Jelinek  <jakub@redhat.com>

	PR c++/93557
	* semantics.c (cp_build_vec_convert): Call decay_conversion on arg
	prior to passing it to c_build_vec_convert.

2020-02-05  Marek Polacek  <polacek@redhat.com>

	PR c++/93559 - ICE with CONSTRUCTOR flags verification.
	* decl.c (reshape_init_array_1): Don't reuse a CONSTRUCTOR with
	TREE_SIDE_EFFECTS.

2020-02-05  Jason Merrill  <jason@redhat.com>

	PR c++/92593
	* decl.c (grokdeclarator): Reject field of current class type even
	in a template.

2020-02-05  Bin Cheng  <bin.cheng@linux.alibaba.com>

	* coroutines.cc (maybe_promote_captured_temps): Increase the index
	number for temporary variables' name.

2020-02-05  Jun Ma <JunMa@linux.alibaba.com>

	* coroutines.cc (build_co_await): Call convert_from_reference
	to wrap co_await_expr with indirect_ref which avoid
	reference/non-reference type confusion.

	(co_await_expander):  Sink to call_expr if await_resume
	is wrapped by indirect_ref.

2020-02-04  Jason Merrill  <jason@redhat.com>

	PR c++/93551
	* constraint.cc (satisfy_declaration_constraints): Check return
	value of push_tinst_level.

	PR c++/90951
	* constexpr.c (cxx_eval_array_reference): {}-initialize missing
	elements instead of value-initializing them.

	PR c++/86917
	* init.c (perform_member_init): Simplify.
	* constexpr.c (cx_check_missing_mem_inits): Allow uninitialized
	flexarray.
	(cxx_eval_vec_init_1): Handle CONSTRUCTOR.

2020-02-04  Iain Sandoe  <iain@sandoe.co.uk>

	* coroutines.cc (find_promise_type): Delete unused forward
	declaration.
	(struct coroutine_info): Add a bool for no promise type error.
	(coro_promise_type_found_p): Only emit the error for a missing
	promise once in each affected coroutine.

2020-02-03  Jason Merrill  <jason@redhat.com>

	PR c++/66477
	* constexpr.c (cxx_eval_constant_expression) [PARM_DECL]: Don't
	defer loading the value of a reference.

2020-02-03  Jason Merrill  <jason@redhat.com>

	PR c++/91953
	* constexpr.c (potential_constant_expression_1) [PARM_DECL]: Allow
	empty class type.
	[COMPONENT_REF]: A member function reference doesn't use the object
	as an rvalue.

2020-02-03  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/93458
	* coroutines.cc (struct coroutine_info): Add a bool flag to note
	that we emitted an error for a bad function return type.
	(get_coroutine_info): Tolerate an unset info table in case of
	missing traits.
	(find_coro_traits_template_decl): In case of error or if we didn't
	find a type template, note we emitted the error and suppress
	duplicates.
	(find_coro_handle_template_decl): Likewise.
	(instantiate_coro_traits): Only check for error_mark_node in the
	return from lookup_qualified_name. 
	(coro_promise_type_found_p): Reorder initialization so that we check
	for the traits and their usability before allocation of the info
	table.  Check for a suitable return type and emit a diagnostic for
	here instead of relying on the lookup machinery.  This allows the
	error to have a better location, and means we can suppress multiple
	copies.
	(coro_function_valid_p): Re-check for a valid promise (and thus the
	traits) before proceeding.  Tolerate missing info as a fatal error.

2020-02-03  Jason Merrill  <jason@redhat.com>

	PR c++/88256
	* cp-gimplify.c (predeclare_vla): New.
	(cp_genericize_r) [NOP_EXPR]: Call it.

2020-02-03  Jun Ma <JunMa@linux.alibaba.com>

	* coroutines.cc (transform_await_wrapper): Set actor funcion as
	new context of label_decl.
	(build_actor_fn): Fill new field of await_xform_data.

2020-02-02  Marek Polacek  <polacek@redhat.com>

	PR c++/93530 - ICE on invalid alignas in a template.
	* decl.c (grokdeclarator): Call cplus_decl_attributes instead of
	decl_attributes.

2020-01-31  Jason Merrill  <jason@redhat.com>

	PR c++/86216
	* semantics.c (process_outer_var_ref): Capture VLAs even in
	unevaluated context.

	PR c++/14179
	* decl.c (reshape_init_array_1): Reuse a single CONSTRUCTOR with
	non-aggregate elements.
	(reshape_init_array): Add first_initializer_p parm.
	(reshape_init_r): Change first_initializer_p from bool to tree.
	(reshape_init): Pass init to it.

	PR c++/14179
	* parser.c (cp_parser_initializer_list): Suppress location wrappers
	after 256 elements.

2020-01-29  Jason Merrill  <jason@redhat.com>

	PR c++/82521
	* pt.c (tsubst_copy_and_build) [EQ_EXPR]: Only suppress warnings if
	the expression was dependent before substitution.

2020-01-30  Bin Cheng  <bin.cheng@linux.alibaba.com>

	* coroutines.cc (act_des_fn): New.
	(morph_fn_to_coro): Call act_des_fn to build actor/destroy decls.
	Access promise via actor function's frame pointer argument.
	(build_actor_fn, build_destroy_fn): Use frame pointer argument.

2020-01-30  Bin Cheng  <bin.cheng@linux.alibaba.com>

	* coroutines.cc (co_await_expander): Handle type conversion case.

2020-01-29  Jason Merrill  <jason@redhat.com>

	PR c++/90333
	PR c++/89640
	PR c++/60503
	* parser.c (cp_parser_type_specifier_seq): Don't parse attributes in
	a trailing return type.
	(cp_parser_lambda_declarator_opt): Parse C++11 attributes before
	parens.

2020-01-29  Marek Polacek  <polacek@redhat.com>

	PR c++/91754 - Fix template arguments comparison with class NTTP.
	* pt.c (class_nttp_const_wrapper_p): New.
	(template_args_equal): See through class_nttp_const_wrapper_p
	arguments.

2020-01-29  Marek Polacek  <polacek@redhat.com>

	PR c++/92948 - Fix class NTTP with template arguments.
	* pt.c (convert_nontype_argument): Use IMPLICIT_CONV_EXPR when
	converting a value-dependent expression to a class type.
	(tsubst_copy) <case VIEW_CONVERT_EXPR>: Allow IMPLICIT_CONV_EXPR
	as the result of the tsubst_copy call.

2020-01-29  Jakub Jelinek  <jakub@redhat.com>

	PR c++/91118
	* cp-gimplify.c (cxx_omp_predetermined_sharing): Return
	OMP_CLAUSE_DEFAULT_SHARED for typeinfo decls.

2020-01-28  Jason Merrill  <jason@redhat.com>

	PR c++/93442
	* parser.c (cp_parser_lambda_expression): Clear in_discarded_stmt.

	PR c++/93477
	PR c++/91476
	* decl2.c (copy_linkage): Do copy DECL_ONE_ONLY and DECL_WEAK.

	PR c++/90546
	* call.c (build_user_type_conversion_1): Allow a template conversion
	returning an rvalue reference to bind directly to an lvalue.

	PR c++/90731
	* decl.c (grokdeclarator): Propagate eh spec from typedef.

2020-01-28  Martin Liska  <mliska@suse.cz>

	PR c++/92440
	* pt.c (redeclare_class_template): Group couple of
	errors and inform messages with auto_diagnostic_group.

2020-01-28  Martin Liska  <mliska@suse.cz>

	PR c++/92440
	* pt.c (redeclare_class_template): Use inform
	for the second location.

2020-01-27  Jason Merrill  <jason@redhat.com>

	PR c++/90966
	* pt.c (tsubst_copy) [STRING_CST]: Don't use fold_convert.

2020-01-27  Iain Sandoe  <iain@sandoe.co.uk>

	PR c++/93443
	* coroutines.cc (morph_fn_to_coro): Check the ramp return
	value when it is constructed from the 'get return object'.

2020-01-27  Nathan Sidwell  <nathan@acm.org>

	PR c++/91826
	* name-lookup.c (is_ancestor): Allow CHILD to be a namespace alias.

2020-01-26  Jason Merrill  <jason@redhat.com>

	PR c++/90992
	* except.c (maybe_noexcept_warning): Check DECL_IN_SYSTEM_HEADER and
	temporarily enable -Wsystem-headers.  Change second warning to
	conditional inform.

	PR c++/90997
	* semantics.c (finish_call_expr): Don't call
	instantiate_non_dependent_expr before warn_for_memset.

2020-01-25  Marek Polacek  <polacek@redhat.com>

	PR c++/93414 - poor diagnostic for dynamic_cast in constexpr context.
	* constexpr.c (cxx_eval_dynamic_cast_fn): Add a reference
	dynamic_cast diagnostic.

2020-01-24  Jason Merrill  <jason@redhat.com>

	PR c++/93400 - ICE with constrained friend.
	* constraint.cc (maybe_substitute_reqs_for): New.
	* decl.c (function_requirements_equivalent_p): Call it.
	* pt.c (tsubst_friend_function): Only substitute
	TEMPLATE_PARMS_CONSTRAINTS.
	(tsubst_template_parms): Copy constraints.

2020-01-24  Jason Merrill  <jason@redhat.com>

	PR c++/93279 - ICE with lambda in member operator.
	* name-lookup.c (maybe_save_operator_binding): Don't remember
	class-scope bindings.

2020-01-24  Jason Merrill  <jason@redhat.com>

	PR c++/93377 - ICE with member alias in constraint.
	* pt.c (any_template_parm_r): Look at template arguments for all
	aliases, not only alias templates.

2020-01-24  Marek Polacek  <polacek@redhat.com>

	PR c++/93299 - ICE in tsubst_copy with parenthesized expression.
	* pt.c (tsubst_copy): Handle a REF_PARENTHESIZED_P VIEW_CONVERT_EXPR.

2020-01-24  Jason Merrill  <jason@redhat.com>

	PR c++/92852 - ICE with generic lambda and reference var.
	* constexpr.c (maybe_constant_value): Likewise.

2020-01-23  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/92804
	* parser.c (cp_parser_nested_name_specifier_opt): Properly
	diagnose concept-ids.

2020-01-23  Jason Merrill  <jason@redhat.com>

	PR c++/93331 - ICE with __builtin_strchr.
	* constexpr.c (cxx_eval_builtin_function_call): Use the original
	argument if we didn't manage to extract a STRING_CST.

	PR c++/93345 - ICE with defaulted dtor and template.
	PR c++/33799
	* decl.c (cxx_maybe_build_cleanup): Don't try to set
	throwing_cleanup in a template.

2020-01-22  Marek Polacek  <polacek@redhat.com>

	PR c++/92907 - noexcept does not consider "const" in member functions.
	* g++.dg/cpp0x/noexcept56.C: New test.

2020-01-22  Marek Polacek  <polacek@redhat.com>

	PR c++/93324 - ICE with -Wall on constexpr if.
	* semantics.c (is_std_constant_evaluated_p): Check fndecl.

2020-01-22  Patrick Palka  <ppalka@redhat.com>

	* constraint.cc (get_mapped_args): Avoid using auto_vec
	as a vector element.  Release the vectors inside the lists
	vector.
	* parser.c (cp_literal_operator_id): Free the buffer.

2020-01-22  Jun Ma  <JunMa@linux.alibaba.com>

	* coroutines.cc (finish_co_await_expr): Add error check on return
	value of build_co_await.
	(finish_co_yield_expr,): Ditto.

2020-01-22  Jun Ma  <JunMa@linux.alibaba.com>

	* coroutines.cc (lookup_awaitable_member): Lookup an awaitable member.
	(lookup_promise_method): Emit diagnostic when get NULL_TREE back only.
	(build_co_await): Use lookup_awaitable_member instead of lookup_member.

2020-01-21  Jason Merrill  <jason@redhat.com>

	PR c++/60855 - ICE with sizeof VLA capture.
	* lambda.c (is_lambda_ignored_entity): Don't look past VLA capture.

	PR c++/90732 - ICE with VLA capture and generic lambda.
	* pt.c (tsubst_lambda_expr): Repeat add_capture for VLAs.

2020-01-21  Iain Sandoe  <iain@sandoe.co.uk>
	    Bin Cheng  <bin.cheng@linux.alibaba.com>

	* coroutines.cc (coro_promise_type_found_p): Check for NULL return
	from complete_type_or_else.
	(register_param_uses): Likewise.
	(build_co_await): Do not try to use complete_type_or_else for void
	types, otherwise for incomplete types, check for NULL return from
	complete_type_or_else.

2020-01-21  Jason Merrill  <jason@redhat.com>

	PR c++/91476 - anon-namespace reference temp clash between TUs.
	* decl2.c (copy_linkage): Factor out of get_guard.
	* call.c (make_temporary_var_for_ref_to_temp): Use it.
	* decl.c (cp_finish_decomp): Use it.
	(cp_finish_decl): determine_visibility sooner.

2020-01-21  Bin Cheng  <bin.cheng@linux.alibaba.com>

	* coroutines.cc (finish_co_await_expr): Set return value flag.
	(finish_co_yield_expr, morph_fn_to_coro): Ditto.

2020-01-19  Jason Merrill  <jason@redhat.com>

	PR c++/33799 - destroy return value, take 2.
	* cp-tree.h (current_retval_sentinel): New macro.
	(struct language_function): Add throwing_cleanup bitfield.
	* decl.c (cxx_maybe_build_cleanup): Set it.
	* except.c (maybe_set_retval_sentinel)
	(maybe_splice_retval_cleanup): New functions.
	* parser.c (cp_parser_compound_statement): Call
	maybe_splice_retval_cleanup.
	* typeck.c (check_return_expr): Call maybe_set_retval_sentinel.

	* parser.c (cp_parser_lambda_body): Use cp_parser_function_body.

2020-01-18  Jakub Jelinek  <jakub@redhat.com>

	* coroutines.cc (get_fn_local_identifier): Fix NO_DOT_IN_LABEL
	but non-NO_DOLLAR_IN_LABEL case build.

2020-01-18  Iain Sandoe  <iain@sandoe.co.uk>

	* Make-lang.in: Add coroutines.o.
	* cp-tree.h (lang_decl-fn): coroutine_p, new bit.
	(DECL_COROUTINE_P): New.
	* lex.c (init_reswords): Enable keywords when the coroutine flag
	is set,
	* operators.def (co_await): New operator.
	* call.c (add_builtin_candidates): Handle CO_AWAIT_EXPR.
	(op_error): Likewise.
	(build_new_op_1): Likewise.
	(build_new_function_call): Validate coroutine builtin arguments.
	* constexpr.c (potential_constant_expression_1): Handle
	CO_AWAIT_EXPR, CO_YIELD_EXPR, CO_RETURN_EXPR.
	* coroutines.cc: New file.
	* cp-objcp-common.c (cp_common_init_ts): Add CO_AWAIT_EXPR,
	CO_YIELD_EXPR, CO_RETRN_EXPR as TS expressions.
	* cp-tree.def (CO_AWAIT_EXPR, CO_YIELD_EXPR, (CO_RETURN_EXPR): New.
	* cp-tree.h (coro_validate_builtin_call): New.
	* decl.c (emit_coro_helper): New.
	(finish_function): Handle the case when a function is found to
	be a coroutine, perform the outlining and emit the outlined
	functions. Set a bit to signal that this is a coroutine component.
	* parser.c (enum required_token): New enumeration RT_CO_YIELD.
	(cp_parser_unary_expression): Handle co_await.
	(cp_parser_assignment_expression): Handle co_yield.
	(cp_parser_statement): Handle RID_CO_RETURN.
	(cp_parser_jump_statement): Handle co_return.
	(cp_parser_operator): Handle co_await operator.
	(cp_parser_yield_expression): New.
	(cp_parser_required_error): Handle RT_CO_YIELD.
	* pt.c (tsubst_copy): Handle CO_AWAIT_EXPR.
	(tsubst_expr): Handle CO_AWAIT_EXPR, CO_YIELD_EXPR and
	CO_RETURN_EXPRs.
	* tree.c (cp_walk_subtrees): Likewise.

2020-01-17  Jason Merrill  <jason@redhat.com>

	PR c++/92531 - ICE with noexcept(lambda).
	* pt.c (uses_template_parms): Don't try to enumerate all the
	expression cases.

2020-01-17  Jakub Jelinek  <jakub@redhat.com>

	PR c++/93228
	* parser.c (cp_parser_template_name): Look up deprecated attribute
	in DECL_TEMPLATE_RESULT or its type's attributes.

2020-01-16  Jason Merrill  <jason@redhat.com>

	PR c++/93286 - ICE with __is_constructible and variadic template.
	* pt.c (tsubst) [TREE_LIST]: Handle pack expansion.
	(tsubst_copy_and_build) [TRAIT_EXPR]: Always use tsubst for type2.

	PR c++/93280 - ICE with aggregate assignment and DMI.
	* init.c (get_nsdmi): Set TARGET_EXPR_DIRECT_INIT_P here.
	* typeck2.c (digest_nsdmi_init): Not here.

2020-01-15  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/91073
	* cp-tree.h (is_constrained_auto): New.
	* parser.c (cp_parser_maybe_commit_to_declaration): Correctly
	handle concept-check expressions; take a cp_decl_specifier_seq*
	instead of a bool.
	(cp_parser_condition): Update call.
	(cp_parser_simple_declaration): Likewise.
	(cp_parser_placeholder_type_specifier): Correctly handle
	concept-check expressions.

2020-01-15  Jason Merrill  <jason@redhat.com>

	Revert
	PR c++/33799 - destroy return value if local cleanup throws.
	* cp-tree.h (current_retval_sentinel): New macro.
	* decl.c (start_preparsed_function): Set up cleanup for retval.
	* typeck.c (check_return_expr): Set current_retval_sentinel.

	PR c++/93257 - consteval void function.
	* constexpr.c (verify_constant): Allow void_node.

	PR c++/92871 - bad code with xvalue and GNU ?: extension.
	* call.c (prevent_lifetime_extension): New.
	(build_conditional_expr_1): Use it.

2020-01-14  Nathan Sidwell  <nathan@acm.org>

	PR c++/90916
	* pt.c (retrieve_specialization): Use get_template_info, not open
	coding access.

	PR c++/90916
	* pt.c (retrieve_specialization): Get the TI from the decl or the
	classtype as appropriate.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* cp-gimplify.c (source_location_table_entry_hash::empty_zero_p):
	New static constant.
	* cp-tree.h (named_decl_hash::empty_zero_p): Likewise.
	(struct named_label_hash::empty_zero_p): Likewise.
	* decl2.c (mangled_decl_hash::empty_zero_p): Likewise.

2020-01-14  Jason Merrill  <jason@redhat.com>

	PR c++/92590 - wrong handling of inherited default ctor.
	* class.c (add_method): A constrained inherited ctor doesn't hide an
	implicit derived ctor.
	Revert:
	PR c++/92552 - ICE with inherited constrained default ctor.
	* pt.c (instantiate_class_template_1): Copy
	TYPE_HAS_USER_CONSTRUCTOR.
	PR c++/91930 - ICE with constrained inherited default ctor.
	* name-lookup.c (do_class_using_decl): Set TYPE_HAS_USER_CONSTRUCTOR
	for inherited constructor.
	PR c++/92594 - ICE with inherited trivial default ctor.
	* method.c (trivial_fn_p): Treat an inherited default constructor
	like a normal default constructor.

	PR c++/92594 - ICE with inherited trivial default ctor.
	* method.c (trivial_fn_p): Treat an inherited default constructor
	like a normal default constructor.

	PR c++/92009 - ICE with punning of typeid.
	* rtti.c (get_tinfo_desc): Call xref_basetypes.
	* constexpr.c (cxx_fold_indirect_ref): Don't strip
	REINTERPRET_CAST_P.

2020-01-13  Jason Merrill  <jason@redhat.com>

	PR c++/92746 - ICE with noexcept of function concept check.
	* except.c (check_noexcept_r): Handle concept-check.

	PR c++/92582 - ICE with member template as requirement.
	* pt.c (struct find_template_parameter_info): Add ctx_parms.
	(any_template_parm_r): Handle TEMPLATE_DECL.
	(find_template_parameters): Take parms instead of their depth.
	* constraint.cc (build_parameter_mapping): Pass them.

	PR c++/33799 - destroy return value if local cleanup throws.
	* cp-tree.h (current_retval_sentinel): New macro.
	* decl.c (start_preparsed_function): Set up cleanup for retval.
	* typeck.c (check_return_expr): Set current_retval_sentinel.

	PR c++/93238 - short right-shift with enum.
	* typeck.c (cp_build_binary_op): Use folded op1 for short_shift.

2020-01-10  Jason Merrill  <jason@redhat.com>

	* typeck.c (cp_build_binary_op): Restore short_shift code.

	PR c++/93143 - incorrect tree sharing with constexpr.
	* constexpr.c (cxx_eval_outermost_constant_expr): Don't assume
	CONSTRUCTORs are already unshared.

	PR c++/93173 - incorrect tree sharing.
	PR c++/93033
	* cp-gimplify.c (cp_gimplify_init_expr, cp_gimplify_expr): Use
	copy_if_shared after cp_genericize_tree.
	* typeck2.c (split_nonconstant_init): Don't unshare here.

2020-01-08  Jason Merrill  <jason@redhat.com>

	* cp-gimplify.c (cp_gimplify_expr) [TARGET_EXPR]: Check
	TARGET_EXPR_DIRECT_INIT_P.
	* constexpr.c (cxx_eval_constant_expression): Likewise.

2020-01-08  Jason Merrill  <jason@redhat.com>

	PR c++/91369 - constexpr destructor and member initializer.
	* constexpr.c (cxx_eval_store_expression): Look through TARGET_EXPR
	when not preevaluating.

2020-01-08  Jason Merrill  <jason@redhat.com>

	* constexpr.c (cxx_eval_call_expression): Remove DECL_BY_REFERENCE
	support.

2020-01-07  Paolo Carlini  <paolo.carlini@oracle.com>

	* init.c (build_new): Add location_t parameter and use it throughout.
	(build_raw_new_expr): Likewise.
	* parser.c (cp_parser_new_expression): Pass the combined_loc.
	* pt.c (tsubst_copy_and_build): Adjust call.
	* cp-tree.h: Update declarations.

2020-01-07  Jason Merrill  <jason@redhat.com>

	PR c++/47877 - -fvisibility-inlines-hidden and member templates.
	* decl2.c (determine_visibility): -fvisibility-inlines-hidden beats
	explicit class visibility for a template.

2020-01-07  Richard Sandiford  <richard.sandiford@arm.com>

	* mangle.c (mangle_type_attribute_p): New function, split out from...
	(write_CV_qualifiers_for_type): ...here.  Don't mangle attributes
	that contain a space.

2020-01-07  Jakub Jelinek  <jakub@redhat.com>

	PR c++/91369
	* constexpr.c (struct constexpr_global_ctx): Add heap_alloc_count
	member, initialize it to zero in ctor.
	(cxx_eval_call_expression): Bump heap_dealloc_count when deleting
	a heap object.  Don't cache calls to functions which allocate some
	heap objects and don't deallocate them or deallocate some heap
	objects they didn't allocate.

2020-01-06  Jason Merrill  <jason@redhat.com>

	PR c++/92552 - ICE with inherited constrained default ctor.
	* pt.c (instantiate_class_template_1): Copy
	TYPE_HAS_USER_CONSTRUCTOR.
	* class.c (one_inherited_ctor): Don't set it here.

2020-01-06  Andrew Sutton  <asutton@lock3software.com>

	PR c++/92739 - parsing requires clause with attributes.
	* parser.c (cp_parser_constraint_requires_parens): Exclude
	attributes as postfix expressions.

2020-01-05  Jakub Jelinek  <jakub@redhat.com>

	PR c++/93138
	* parser.c (cp_parser_check_class_key): Disable access checks for the
	simple name lookup.
	(cp_parser_maybe_warn_enum_key): Likewise.  Return early if
	!warn_redundant_tags.

2010-01-05  Jakub Jelinek  <jakub@redhat.com>

	PR c++/93046
	* cp-gimplify.c (cp_gimplify_init_expr): Don't look through
	TARGET_EXPR if it has been gimplified already.

2020-01-03  Jason Merrill  <jason@redhat.com>

	PR c++/93033 - incorrect tree node sharing with array init.
	* typeck2.c (split_nonconstant_init): Unshare non-decl.
	* cp-gimplify.c (cp_gimplify_init_expr): Only split if -fexceptions.

2020-01-02  Jason Merrill  <jason@redhat.com>

	* pt.c (invalid_nontype_parm_type_p): Reject class placeholder in
	C++17.

2020-01-02  Jakub Jelinek  <jakub@redhat.com>

	PR c/90677
	* cp-objcp-common.c (identifier_global_tag): Return NULL_TREE if name
	has not been found, rather than error_mark_node.

2020-01-01  Jakub Jelinek  <jakub@redhat.com>

	Update copyright years.

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