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/* Shrink-wrapping related functions.
Copyright (C) 1989-2014 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_SHRINK_WRAP_H
#define GCC_SHRINK_WRAP_H
#include "hashtab.h"
#include "vec.h"
#include "machmode.h"
#ifdef HAVE_simple_return
/* In function.c. */
extern void emit_return_into_block (bool simple_p, basic_block bb);
extern bool active_insn_between (rtx_insn *head, rtx_insn *tail);
extern vec<edge> convert_jumps_to_returns (basic_block last_bb, bool simple_p,
vec<edge> unconverted);
extern basic_block emit_return_for_exit (edge exit_fallthru_edge,
bool simple_p);
/* In shrink-wrap.c. */
extern bool requires_stack_frame_p (rtx_insn *, HARD_REG_SET, HARD_REG_SET);
extern void prepare_shrink_wrap (basic_block entry_block);
extern void dup_block_and_redirect (basic_block bb, basic_block copy_bb,
rtx_insn *before,
bitmap_head *need_prologue);
extern void try_shrink_wrapping (edge *entry_edge, edge orig_entry_edge,
bitmap_head *bb_flags, rtx_insn *prologue_seq);
extern edge get_unconverted_simple_return (edge, bitmap_head,
vec<edge> *, rtx_insn **);
extern void convert_to_simple_return (edge entry_edge, edge orig_entry_edge,
bitmap_head bb_flags,
rtx_insn *returnjump,
vec<edge> unconverted_simple_returns);
#define SHRINK_WRAPPING_ENABLED (flag_shrink_wrap && HAVE_simple_return)
#else
#define SHRINK_WRAPPING_ENABLED false
#endif
#endif /* GCC_SHRINK_WRAP_H */
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