1 /* Shrink-wrapping related functions. 2 Copyright (C) 1989-2015 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 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. 10 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. 15 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/>. */ 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. */ 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 49 50 #endif /* GCC_SHRINK_WRAP_H */ 51 52 53