1/* Loop manipulation header.
2 Copyright (C) 2014-2023 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. */
35#define DLTHE_FLAG_FLAT_PROFILE 8 /* Profile is flat; do not reduce
36 count by unroll factor. */
37extern edge mfb_kj_edge;
38
39extern bool remove_path (edge, bool * = NULL, bitmap = NULL);
40extern void place_new_loop (struct function *, class loop *);
41extern void add_loop (class loop *, class loop *);
42extern void scale_loop_frequencies (class loop *, profile_probability);
43extern void scale_loop_profile (class loop *, profile_probability, gcov_type);
44extern edge create_empty_if_region_on_edge (edge, tree);
45extern class loop *create_empty_loop_on_edge (edge, tree, tree, tree, tree,
46 tree *, tree *, class loop *);
47extern void unloop (class loop *, bool *, bitmap);
48extern void unloop_loops (vec<class loop *> &loops_to_unloop,
49 vec<int> &loops_to_unloop_nunroll,
50 bitmap loop_closed_ssa_invalidated,
51 bool *irred_invalidated);
52extern void copy_loop_info (class loop *loop, class loop *target);
53extern class loop * duplicate_loop (class loop *, class loop *,
54 class loop * = NULL);
55extern void duplicate_subloops (class loop *, class loop *);
56extern bool can_duplicate_loop_p (const class loop *loop);
57extern bool
58duplicate_loop_body_to_header_edge (class loop *, edge, unsigned, sbitmap, edge,
59 vec<edge> *, int);
60extern bool mfb_keep_just (edge);
61basic_block create_preheader (class loop *, int);
62extern void create_preheaders (int);
63extern void force_single_succ_latches (void);
64class loop * loop_version (class loop *, void *,
65 basic_block *,
66 profile_probability, profile_probability,
67 profile_probability, profile_probability, bool);
68void adjust_loop_info_after_peeling (class loop *loop, int npeel, bool precise);
69void scale_dominated_blocks_in_loop (class loop *loop, basic_block bb,
70 profile_count num, profile_count den);
71edge update_loop_exit_probability_scale_dom_bbs
72 (class loop *loop, edge exit_edge = NULL,
73 profile_count desired_count = profile_count::uninitialized ());
74void update_exit_probability_after_unrolling (class loop *loop, edge new_exit);
75
76#endif /* GCC_CFGLOOPMANIP_H */
77

source code of gcc/cfgloopmanip.h