1 /* Loop manipulation header.
2 Copyright (C) 2014-2017 Free Software Foundation, Inc.
4 This file is part of GCC.
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
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
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/>. */
20 #ifndef GCC_CFGLOOPMANIP_H
21 #define GCC_CFGLOOPMANIP_H
25 CP_SIMPLE_PREHEADERS
= 1,
26 CP_FALLTHRU_PREHEADERS
= 2
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 extern edge mfb_kj_edge
;
37 extern bool remove_path (edge
, bool * = NULL
, bitmap
= NULL
);
38 extern void place_new_loop (struct function
*, struct loop
*);
39 extern void add_loop (struct loop
*, struct loop
*);
40 extern void scale_loop_frequencies (struct loop
*, int, int);
41 extern void scale_loop_profile (struct loop
*, int, gcov_type
);
42 extern edge
create_empty_if_region_on_edge (edge
, tree
);
43 extern struct loop
*create_empty_loop_on_edge (edge
, tree
, tree
, tree
, tree
,
44 tree
*, tree
*, struct loop
*);
45 extern struct loop
*loopify (edge
, edge
,
46 basic_block
, edge
, edge
, bool,
48 extern void unloop (struct loop
*, bool *, bitmap
);
49 extern void copy_loop_info (struct loop
*loop
, struct loop
*target
);
50 extern struct loop
* duplicate_loop (struct loop
*, struct loop
*);
51 extern void duplicate_subloops (struct loop
*, struct loop
*);
52 extern bool can_duplicate_loop_p (const struct loop
*loop
);
53 extern bool duplicate_loop_to_header_edge (struct loop
*, edge
,
54 unsigned, sbitmap
, edge
,
56 extern bool mfb_keep_just (edge
);
57 basic_block
create_preheader (struct loop
*, int);
58 extern void create_preheaders (int);
59 extern void force_single_succ_latches (void);
60 struct loop
* loop_version (struct loop
*, void *,
62 profile_probability
, profile_probability
,
63 unsigned, unsigned, bool);
65 #endif /* GCC_CFGLOOPMANIP_H */