1/* Shrink-wrapping related functions.
2   Copyright (C) 1989-2015 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3.  If not see
18<http://www.gnu.org/licenses/>.  */
19
20#ifndef GCC_SHRINK_WRAP_H
21#define GCC_SHRINK_WRAP_H
22
23#include "hashtab.h"
24#include "vec.h"
25#include "machmode.h"
26
27#ifdef HAVE_simple_return
28
29#include "function.h"
30
31/* In shrink-wrap.c.  */
32extern bool requires_stack_frame_p (rtx_insn *, HARD_REG_SET, HARD_REG_SET);
33extern void prepare_shrink_wrap (basic_block entry_block);
34extern void dup_block_and_redirect (basic_block bb, basic_block copy_bb,
35				    rtx_insn *before,
36				    bitmap_head *need_prologue);
37extern void try_shrink_wrapping (edge *entry_edge, edge orig_entry_edge,
38				 bitmap_head *bb_flags, rtx_insn *prologue_seq);
39extern edge get_unconverted_simple_return (edge, bitmap_head,
40					   vec<edge> *, rtx_insn **);
41extern 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
49
50#endif  /* GCC_SHRINK_WRAP_H  */
51
52
53