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/* Loop manipulation header.
Copyright (C) 2014-2020 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_CFGLOOPMANIP_H
#define GCC_CFGLOOPMANIP_H
enum
{
CP_SIMPLE_PREHEADERS = 1,
CP_FALLTHRU_PREHEADERS = 2
};
#define DLTHE_FLAG_UPDATE_FREQ 1 /* Update frequencies in
duplicate_loop_to_header_edge. */
#define DLTHE_RECORD_COPY_NUMBER 2 /* Record copy number in the aux
field of newly create BB. */
#define DLTHE_FLAG_COMPLETTE_PEEL 4 /* Update frequencies expecting
a complete peeling. */
extern edge mfb_kj_edge;
extern bool remove_path (edge, bool * = NULL, bitmap = NULL);
extern void place_new_loop (struct function *, class loop *);
extern void add_loop (class loop *, class loop *);
extern void scale_loop_frequencies (class loop *, profile_probability);
extern void scale_loop_profile (class loop *, profile_probability, gcov_type);
extern edge create_empty_if_region_on_edge (edge, tree);
extern class loop *create_empty_loop_on_edge (edge, tree, tree, tree, tree,
tree *, tree *, class loop *);
extern class loop *loopify (edge, edge,
basic_block, edge, edge, bool,
profile_probability, profile_probability);
extern void unloop (class loop *, bool *, bitmap);
extern void copy_loop_info (class loop *loop, class loop *target);
extern class loop * duplicate_loop (class loop *, class loop *,
class loop * = NULL);
extern void duplicate_subloops (class loop *, class loop *);
extern bool can_duplicate_loop_p (const class loop *loop);
extern bool duplicate_loop_to_header_edge (class loop *, edge,
unsigned, sbitmap, edge,
vec<edge> *, int);
extern bool mfb_keep_just (edge);
basic_block create_preheader (class loop *, int);
extern void create_preheaders (int);
extern void force_single_succ_latches (void);
class loop * loop_version (class loop *, void *,
basic_block *,
profile_probability, profile_probability,
profile_probability, profile_probability, bool);
#endif /* GCC_CFGLOOPMANIP_H */
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