1/* Loop manipulation header. 2 Copyright (C) 2014-2015 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_CFGLOOPMANIP_H 21#define GCC_CFGLOOPMANIP_H 22 23enum 24{ 25 CP_SIMPLE_PREHEADERS = 1, 26 CP_FALLTHRU_PREHEADERS = 2 27}; 28 29#define DLTHE_FLAG_UPDATE_FREQ 1 /* Update frequencies in 30 duplicate_loop_to_header_edge. */ 31#define DLTHE_RECORD_COPY_NUMBER 2 /* Record copy number in the aux 32 field of newly create BB. */ 33#define DLTHE_FLAG_COMPLETTE_PEEL 4 /* Update frequencies expecting 34 a complete peeling. */ 35extern edge mfb_kj_edge; 36 37extern bool remove_path (edge); 38extern void place_new_loop (struct function *, struct loop *); 39extern void add_loop (struct loop *, struct loop *); 40extern void scale_loop_frequencies (struct loop *, int, int); 41extern void scale_loop_profile (struct loop *, int, gcov_type); 42extern edge create_empty_if_region_on_edge (edge, tree); 43extern struct loop *create_empty_loop_on_edge (edge, tree, tree, tree, tree, 44 tree *, tree *, struct loop *); 45extern struct loop *loopify (edge, edge, 46 basic_block, edge, edge, bool, 47 unsigned, unsigned); 48extern void unloop (struct loop *, bool *, bitmap); 49extern void copy_loop_info (struct loop *loop, struct loop *target); 50extern struct loop * duplicate_loop (struct loop *, struct loop *); 51extern void duplicate_subloops (struct loop *, struct loop *); 52extern bool can_duplicate_loop_p (const struct loop *loop); 53extern bool duplicate_loop_to_header_edge (struct loop *, edge, 54 unsigned, sbitmap, edge, 55 vec<edge> *, int); 56extern bool mfb_keep_just (edge); 57basic_block create_preheader (struct loop *, int); 58extern void create_preheaders (int); 59extern void force_single_succ_latches (void); 60struct loop * loop_version (struct loop *, void *, 61 basic_block *, unsigned, unsigned, unsigned, bool); 62 63#endif /* GCC_CFGLOOPMANIP_H */ 64