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diff --git a/gcc-4.9/gcc/libfuncs.h b/gcc-4.9/gcc/libfuncs.h
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+++ b/gcc-4.9/gcc/libfuncs.h
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+/* Definitions for code generation pass of GNU compiler.
+   Copyright (C) 2001-2014 Free Software Foundation, Inc.
+
+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/>.  */
+
+#ifndef GCC_LIBFUNCS_H
+#define GCC_LIBFUNCS_H
+
+#include "hashtab.h"
+
+/* Enumeration of indexes into libfunc_table.  */
+enum libfunc_index
+{
+  LTI_abort,
+  LTI_memcpy,
+  LTI_memmove,
+  LTI_memcmp,
+  LTI_memset,
+  LTI_setbits,
+
+  LTI_setjmp,
+  LTI_longjmp,
+  LTI_unwind_sjlj_register,
+  LTI_unwind_sjlj_unregister,
+
+  LTI_profile_function_entry,
+  LTI_profile_function_exit,
+
+  LTI_synchronize,
+
+  LTI_gcov_flush,
+
+  LTI_MAX
+};
+
+/* Information about an optab-related libfunc.  The op field is logically
+   an enum optab_d, and the mode fields are logically enum machine_mode.
+   However, in the absence of forward-declared enums, there's no practical
+   benefit of pulling in the defining headers.
+
+   We use the same hashtable for normal optabs and conversion optabs.  In
+   the first case mode2 is forced to VOIDmode.  */
+
+struct GTY(()) libfunc_entry {
+  int op, mode1, mode2;
+  rtx libfunc;
+};
+
+/* Target-dependent globals.  */
+struct GTY(()) target_libfuncs {
+  /* SYMBOL_REF rtx's for the library functions that are called
+     implicitly and not via optabs.  */
+  rtx x_libfunc_table[LTI_MAX];
+
+  /* Hash table used to convert declarations into nodes.  */
+  htab_t GTY((param_is (struct libfunc_entry))) x_libfunc_hash;
+};
+
+extern GTY(()) struct target_libfuncs default_target_libfuncs;
+#if SWITCHABLE_TARGET
+extern struct target_libfuncs *this_target_libfuncs;
+#else
+#define this_target_libfuncs (&default_target_libfuncs)
+#endif
+
+#define libfunc_table \
+  (this_target_libfuncs->x_libfunc_table)
+
+/* Accessor macros for libfunc_table.  */
+
+#define abort_libfunc	(libfunc_table[LTI_abort])
+#define memcpy_libfunc	(libfunc_table[LTI_memcpy])
+#define memmove_libfunc	(libfunc_table[LTI_memmove])
+#define memcmp_libfunc	(libfunc_table[LTI_memcmp])
+#define memset_libfunc	(libfunc_table[LTI_memset])
+#define setbits_libfunc	(libfunc_table[LTI_setbits])
+
+#define setjmp_libfunc	(libfunc_table[LTI_setjmp])
+#define longjmp_libfunc	(libfunc_table[LTI_longjmp])
+#define unwind_sjlj_register_libfunc (libfunc_table[LTI_unwind_sjlj_register])
+#define unwind_sjlj_unregister_libfunc \
+  (libfunc_table[LTI_unwind_sjlj_unregister])
+
+#define profile_function_entry_libfunc	(libfunc_table[LTI_profile_function_entry])
+#define profile_function_exit_libfunc	(libfunc_table[LTI_profile_function_exit])
+
+#define synchronize_libfunc	(libfunc_table[LTI_synchronize])
+
+#define gcov_flush_libfunc	(libfunc_table[LTI_gcov_flush])
+
+/* In explow.c */
+extern void set_stack_check_libfunc (const char *);
+
+#endif /* GCC_LIBFUNCS_H */