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1 /* Loop manipulation header.
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2 Copyright (C) 2014-2018 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #ifndef GCC_CFGLOOPMANIP_H
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21 #define GCC_CFGLOOPMANIP_H
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22
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23 enum
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24 {
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25 CP_SIMPLE_PREHEADERS = 1,
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26 CP_FALLTHRU_PREHEADERS = 2
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27 };
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28
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29 #define DLTHE_FLAG_UPDATE_FREQ 1 /* Update frequencies in
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30 duplicate_loop_to_header_edge. */
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31 #define DLTHE_RECORD_COPY_NUMBER 2 /* Record copy number in the aux
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32 field of newly create BB. */
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33 #define DLTHE_FLAG_COMPLETTE_PEEL 4 /* Update frequencies expecting
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34 a complete peeling. */
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35 extern edge mfb_kj_edge;
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36
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37 extern bool remove_path (edge, bool * = NULL, bitmap = NULL);
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38 extern void place_new_loop (struct function *, struct loop *);
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39 extern void add_loop (struct loop *, struct loop *);
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40 extern void scale_loop_frequencies (struct loop *, profile_probability);
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41 extern void scale_loop_profile (struct loop *, profile_probability, gcov_type);
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42 extern edge create_empty_if_region_on_edge (edge, tree);
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43 extern struct loop *create_empty_loop_on_edge (edge, tree, tree, tree, tree,
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44 tree *, tree *, struct loop *);
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45 extern struct loop *loopify (edge, edge,
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46 basic_block, edge, edge, bool,
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47 profile_probability, profile_probability);
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48 extern void unloop (struct loop *, bool *, bitmap);
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49 extern void copy_loop_info (struct loop *loop, struct loop *target);
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50 extern struct loop * duplicate_loop (struct loop *, struct loop *,
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51 struct loop * = NULL);
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52 extern void duplicate_subloops (struct loop *, struct loop *);
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53 extern bool can_duplicate_loop_p (const struct loop *loop);
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54 extern bool duplicate_loop_to_header_edge (struct loop *, edge,
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55 unsigned, sbitmap, edge,
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56 vec<edge> *, int);
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57 extern bool mfb_keep_just (edge);
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58 basic_block create_preheader (struct loop *, int);
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59 extern void create_preheaders (int);
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60 extern void force_single_succ_latches (void);
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61 struct loop * loop_version (struct loop *, void *,
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62 basic_block *,
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63 profile_probability, profile_probability,
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64 profile_probability, profile_probability, bool);
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65
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66 #endif /* GCC_CFGLOOPMANIP_H */
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