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