gcc/cfgloopmanip.h

   1 /* Loop manipulation header.
   2    Copyright (C) 2014-2023 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   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
   9 version.
  10
  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
  14 for more details.
  15
  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/>.  */
  19
  20 #ifndef GCC_CFGLOOPMANIP_H
  21 #define GCC_CFGLOOPMANIP_H
  22
  23 enum
  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.  */
  37 extern edge mfb_kj_edge;
  38
  39 extern bool remove_path (edge, bool * = NULL, bitmap = NULL);
  40 extern void place_new_loop (struct function *, class loop *);
  41 extern void add_loop (class loop *, class loop *);
  42 extern void scale_loop_frequencies (class loop *, profile_probability);
  43 extern void scale_loop_profile (class loop *, profile_probability, gcov_type);
  44 extern edge create_empty_if_region_on_edge (edge, tree);
  45 extern class loop *create_empty_loop_on_edge (edge, tree, tree, tree, tree,
  46                                                tree *, tree *, class loop *);
  47 extern void unloop (class loop *, bool *, bitmap);
  48 extern 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);
  52 extern void copy_loop_info (class loop *loop, class loop *target);
  53 extern class loop * duplicate_loop (class loop *, class loop *,
  54                                      class loop * = NULL);
  55 extern void duplicate_subloops (class loop *, class loop *);
  56 extern bool can_duplicate_loop_p (const class loop *loop);
  57 extern bool
  58 duplicate_loop_body_to_header_edge (class loop *, edge, unsigned, sbitmap, edge,
  59                                     vec<edge> *, int);
  60 extern bool mfb_keep_just (edge);
  61 basic_block create_preheader (class loop *, int);
  62 extern void create_preheaders (int);
  63 extern void force_single_succ_latches (void);
  64 class loop * loop_version (class loop *, void *,
  65                             basic_block *,
  66                             profile_probability, profile_probability,
  67                             profile_probability, profile_probability, bool);
  68 void adjust_loop_info_after_peeling (class loop *loop, int npeel, bool precise);
  69 void scale_dominated_blocks_in_loop (class loop *loop, basic_block bb,
  70                                      profile_count num, profile_count den);
  71 edge update_loop_exit_probability_scale_dom_bbs
  72                 (class loop *loop, edge exit_edge = NULL,
  73                  profile_count desired_count = profile_count::uninitialized ());
  74 void update_exit_probability_after_unrolling (class loop *loop, edge new_exit);
  75
  76 #endif /* GCC_CFGLOOPMANIP_H */