gcc/
[official-gcc.git] / gcc / shrink-wrap.h
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1 /* Shrink-wrapping related functions.
2 Copyright (C) 1989-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef GCC_SHRINK_WRAP_H
21 #define GCC_SHRINK_WRAP_H
23 #include "hashtab.h"
24 #include "vec.h"
25 #include "machmode.h"
27 #ifdef HAVE_simple_return
29 #include "function.h"
31 /* In shrink-wrap.c. */
32 extern bool requires_stack_frame_p (rtx_insn *, HARD_REG_SET, HARD_REG_SET);
33 extern void prepare_shrink_wrap (basic_block entry_block);
34 extern void dup_block_and_redirect (basic_block bb, basic_block copy_bb,
35 rtx_insn *before,
36 bitmap_head *need_prologue);
37 extern void try_shrink_wrapping (edge *entry_edge, edge orig_entry_edge,
38 bitmap_head *bb_flags, rtx_insn *prologue_seq);
39 extern edge get_unconverted_simple_return (edge, bitmap_head,
40 vec<edge> *, rtx_insn **);
41 extern void convert_to_simple_return (edge entry_edge, edge orig_entry_edge,
42 bitmap_head bb_flags,
43 rtx_insn *returnjump,
44 vec<edge> unconverted_simple_returns);
45 #define SHRINK_WRAPPING_ENABLED (flag_shrink_wrap && HAVE_simple_return)
46 #else
47 #define SHRINK_WRAPPING_ENABLED false
48 #endif
50 #endif /* GCC_SHRINK_WRAP_H */