--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/except.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,176 @@
+/* Exception Handling interface routines.
+   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+   2007, 2008  Free Software Foundation, Inc.
+   Contributed by Mike Stump <mrs@cygnus.com>.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+
+struct function;
+
+/* Per-function EH data.  Used only in except.c, but GC and others
+   manipulate pointers to the opaque type.  */
+struct eh_status;
+
+/* Internal structure describing a region.  */
+struct eh_region;
+
+/* Test: is exception handling turned on?  */
+extern int doing_eh (int);
+
+/* Note that the current EH region (if any) may contain a throw, or a
+   call to a function which itself may contain a throw.  */
+extern void note_eh_region_may_contain_throw (struct eh_region *);
+
+/* Invokes CALLBACK for every exception handler label.  Only used by old
+   loop hackery; should not be used by new code.  */
+extern void for_each_eh_label (void (*) (rtx));
+
+/* Invokes CALLBACK for every exception region in the current function.  */
+extern void for_each_eh_region (void (*) (struct eh_region *));
+
+/* Determine if the given INSN can throw an exception.  */
+extern bool can_throw_internal_1 (int, bool);
+extern bool can_throw_internal (const_rtx);
+extern bool can_throw_external_1 (int, bool);
+extern bool can_throw_external (const_rtx);
+
+/* Set TREE_NOTHROW and cfun->all_throwers_are_sibcalls.  */
+extern unsigned int set_nothrow_function_flags (void);
+
+/* After initial rtl generation, call back to finish generating
+   exception support code.  */
+extern void finish_eh_generation (void);
+
+extern void init_eh (void);
+extern void init_eh_for_function (void);
+
+extern rtx reachable_handlers (rtx);
+extern void maybe_remove_eh_handler (rtx);
+
+extern void convert_from_eh_region_ranges (void);
+extern unsigned int convert_to_eh_region_ranges (void);
+extern void find_exception_handler_labels (void);
+extern bool current_function_has_exception_handlers (void);
+extern void output_function_exception_table (const char *);
+
+extern void expand_builtin_unwind_init (void);
+extern rtx expand_builtin_eh_return_data_regno (tree);
+extern rtx expand_builtin_extract_return_addr (tree);
+extern void expand_builtin_init_dwarf_reg_sizes (tree);
+extern rtx expand_builtin_frob_return_addr (tree);
+extern rtx expand_builtin_dwarf_sp_column (void);
+extern void expand_builtin_eh_return (tree, tree);
+extern void expand_eh_return (void);
+extern rtx expand_builtin_extend_pointer (tree);
+extern rtx get_exception_pointer (void);
+extern rtx get_exception_filter (void);
+typedef tree (*duplicate_eh_regions_map) (tree, void *);
+extern int duplicate_eh_regions (struct function *, duplicate_eh_regions_map,
+				 void *, int, int);
+
+extern void sjlj_emit_function_exit_after (rtx);
+extern void default_init_unwind_resume_libfunc (void);
+
+extern struct eh_region *gen_eh_region_cleanup (struct eh_region *,
+						struct eh_region *);
+extern struct eh_region *gen_eh_region_try (struct eh_region *);
+extern struct eh_region *gen_eh_region_catch (struct eh_region *, tree);
+extern struct eh_region *gen_eh_region_allowed (struct eh_region *, tree);
+extern struct eh_region *gen_eh_region_must_not_throw (struct eh_region *);
+extern int get_eh_region_number (struct eh_region *);
+extern bool get_eh_region_may_contain_throw (struct eh_region *);
+extern tree get_eh_region_tree_label (struct eh_region *);
+extern void set_eh_region_tree_label (struct eh_region *, tree);
+
+extern void foreach_reachable_handler (int, bool,
+				       void (*) (struct eh_region *, void *),
+				       void *);
+
+extern void collect_eh_region_array (void);
+extern void expand_resx_expr (tree);
+extern void verify_eh_tree (struct function *);
+extern void dump_eh_tree (FILE *, struct function *);
+extern bool eh_region_outer_p (struct function *, int, int);
+extern int eh_region_outermost (struct function *, int, int);
+
+/* If non-NULL, this is a function that returns an expression to be
+   executed if an unhandled exception is propagated out of a cleanup
+   region.  For example, in C++, an exception thrown by a destructor
+   during stack unwinding is required to result in a call to
+   `std::terminate', so the C++ version of this function returns a
+   CALL_EXPR for `std::terminate'.  */
+extern gimple (*lang_protect_cleanup_actions) (void);
+
+/* Return true if type A catches type B.  */
+extern int (*lang_eh_type_covers) (tree a, tree b);
+
+/* Map a type to a runtime object to match type.  */
+extern tree (*lang_eh_runtime_type) (tree);
+
+
+/* Just because the user configured --with-sjlj-exceptions=no doesn't
+   mean that we can use call frame exceptions.  Detect that the target
+   has appropriate support.  */
+
+#ifndef MUST_USE_SJLJ_EXCEPTIONS
+# if defined (EH_RETURN_DATA_REGNO)			\
+       && (defined (TARGET_UNWIND_INFO)			\
+	   || (DWARF2_UNWIND_INFO			\
+	       && (defined (EH_RETURN_HANDLER_RTX)	\
+		   || defined (HAVE_eh_return))))
+#  define MUST_USE_SJLJ_EXCEPTIONS	0
+# else
+#  define MUST_USE_SJLJ_EXCEPTIONS	1
+# endif
+#endif
+
+#ifdef CONFIG_SJLJ_EXCEPTIONS
+# if CONFIG_SJLJ_EXCEPTIONS == 1
+#  define USING_SJLJ_EXCEPTIONS		1
+# endif
+# if CONFIG_SJLJ_EXCEPTIONS == 0
+#  define USING_SJLJ_EXCEPTIONS		0
+#  if !defined(EH_RETURN_DATA_REGNO)
+    #error "EH_RETURN_DATA_REGNO required"
+#  endif
+#  if ! (defined(TARGET_UNWIND_INFO) || DWARF2_UNWIND_INFO)
+    #error "{DWARF2,TARGET}_UNWIND_INFO required"
+#  endif
+#  if !defined(TARGET_UNWIND_INFO) \
+	&& !(defined(EH_RETURN_HANDLER_RTX) || defined(HAVE_eh_return))
+    #error "EH_RETURN_HANDLER_RTX or eh_return required"
+#  endif
+/* Usually the above error checks will have already triggered an
+   error, but backends may set MUST_USE_SJLJ_EXCEPTIONS for their own
+   reasons.  */
+#  if MUST_USE_SJLJ_EXCEPTIONS
+    #error "Must use SJLJ exceptions but configured not to"
+#  endif
+# endif
+#else
+# define USING_SJLJ_EXCEPTIONS		MUST_USE_SJLJ_EXCEPTIONS
+#endif
+
+struct throw_stmt_node GTY(())
+{
+  gimple stmt;
+  int region_nr;
+};
+
+extern struct htab *get_eh_throw_stmt_table (struct function *);
+extern void set_eh_throw_stmt_table (struct function *, struct htab *);