gcc/dominance.h

   1 /* Calculate (post)dominators header file.
   2    Copyright (C) 2014-2021 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
   7    under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    GCC is distributed in the hope that it will be useful, but WITHOUT
  12    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  14    License 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_DOMINANCE_H
  21 #define GCC_DOMINANCE_H
  22
  23 enum cdi_direction
  24 {
  25   CDI_DOMINATORS = 1,
  26   CDI_POST_DOMINATORS = 2
  27 };
  28
  29 /* State of dominance information.  */
  30
  31 enum dom_state
  32 {
  33   DOM_NONE,             /* Not computed at all.  */
  34   DOM_NO_FAST_QUERY,    /* The data is OK, but the fast query data are not usable.  */
  35   DOM_OK                /* Everything is ok.  */
  36 };
  37
  38 extern void calculate_dominance_info (enum cdi_direction);
  39 extern void calculate_dominance_info_for_region (enum cdi_direction,
  40                                                  vec<basic_block>);
  41 extern void free_dominance_info (function *, enum cdi_direction);
  42 extern void free_dominance_info (enum cdi_direction);
  43 extern void free_dominance_info_for_region (function *,
  44                                             enum cdi_direction,
  45                                             vec<basic_block>);
  46 extern basic_block get_immediate_dominator (enum cdi_direction, basic_block);
  47 extern void set_immediate_dominator (enum cdi_direction, basic_block,
  48                                      basic_block);
  49 extern auto_vec<basic_block> get_dominated_by (enum cdi_direction, basic_block);
  50 extern auto_vec<basic_block> get_dominated_by_region (enum cdi_direction,
  51                                                          basic_block *,
  52                                                          unsigned);
  53 extern auto_vec<basic_block> get_dominated_to_depth (enum cdi_direction,
  54                                                      basic_block, int);
  55 extern auto_vec<basic_block> get_all_dominated_blocks (enum cdi_direction,
  56                                                        basic_block);
  57 extern void redirect_immediate_dominators (enum cdi_direction, basic_block,
  58                                            basic_block);
  59 extern basic_block nearest_common_dominator (enum cdi_direction,
  60                                              basic_block, basic_block);
  61 extern basic_block nearest_common_dominator_for_set (enum cdi_direction,
  62                                                      bitmap);
  63 extern bool dominated_by_p (enum cdi_direction, const_basic_block,
  64                             const_basic_block);
  65 unsigned bb_dom_dfs_in (enum cdi_direction, basic_block);
  66 unsigned bb_dom_dfs_out (enum cdi_direction, basic_block);
  67 extern void verify_dominators (enum cdi_direction);
  68
  69 /* Verify invariants of computed dominance information, if internal consistency
  70    checks are enabled.  */
  71
  72 static inline void
  73 checking_verify_dominators (cdi_direction dir)
  74 {
  75   if (flag_checking)
  76     verify_dominators (dir);
  77 }
  78
  79 basic_block recompute_dominator (enum cdi_direction, basic_block);
  80 extern void iterate_fix_dominators (enum cdi_direction,
  81                                     vec<basic_block> &, bool);
  82 extern void add_to_dominance_info (enum cdi_direction, basic_block);
  83 extern void delete_from_dominance_info (enum cdi_direction, basic_block);
  84 extern basic_block first_dom_son (enum cdi_direction, basic_block);
  85 extern basic_block next_dom_son (enum cdi_direction, basic_block);
  86 extern enum dom_state dom_info_state (function *, enum cdi_direction);
  87 extern enum dom_state dom_info_state (enum cdi_direction);
  88 extern void set_dom_info_availability (enum cdi_direction, enum dom_state);
  89 extern bool dom_info_available_p (function *, enum cdi_direction);
  90 extern bool dom_info_available_p (enum cdi_direction);
  91
  92
  93
  94 #endif /* GCC_DOMINANCE_H */