1/* Loop manipulation header.
2 Copyright (C) 2014-2017 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, bool * = NULL, bitmap = NULL);
38extern void place_new_loop (struct function *, struct loop *);
39extern void add_loop (struct loop *, struct loop *);
40extern void scale_loop_frequencies (struct loop *, profile_probability);
41extern void scale_loop_profile (struct loop *, profile_probability, 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 profile_probability, profile_probability);
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 *,
51 struct loop * = NULL);
52extern void duplicate_subloops (struct loop *, struct loop *);
53extern bool can_duplicate_loop_p (const struct loop *loop);
54extern bool duplicate_loop_to_header_edge (struct loop *, edge,
55 unsigned, sbitmap, edge,
56 vec<edge> *, int);
57extern bool mfb_keep_just (edge);
58basic_block create_preheader (struct loop *, int);
59extern void create_preheaders (int);
60extern void force_single_succ_latches (void);
61struct loop * loop_version (struct loop *, void *,
62 basic_block *,
63 profile_probability, profile_probability,
64 profile_probability, profile_probability, bool);
65
66#endif /* GCC_CFGLOOPMANIP_H */
67