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1 /* Calculate (post)dominators header file.
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145
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2 Copyright (C) 2014-2020 Free Software Foundation, Inc.
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111
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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
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7 under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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14 License 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_DOMINANCE_H
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21 #define GCC_DOMINANCE_H
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22
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23 enum cdi_direction
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24 {
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25 CDI_DOMINATORS = 1,
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26 CDI_POST_DOMINATORS = 2
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27 };
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28
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29 /* State of dominance information. */
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30
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31 enum dom_state
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32 {
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33 DOM_NONE, /* Not computed at all. */
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34 DOM_NO_FAST_QUERY, /* The data is OK, but the fast query data are not usable. */
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35 DOM_OK /* Everything is ok. */
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36 };
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37
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38 extern void calculate_dominance_info (enum cdi_direction);
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39 extern void calculate_dominance_info_for_region (enum cdi_direction,
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40 vec<basic_block>);
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41 extern void free_dominance_info (function *, enum cdi_direction);
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42 extern void free_dominance_info (enum cdi_direction);
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43 extern void free_dominance_info_for_region (function *,
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44 enum cdi_direction,
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45 vec<basic_block>);
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46 extern basic_block get_immediate_dominator (enum cdi_direction, basic_block);
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47 extern void set_immediate_dominator (enum cdi_direction, basic_block,
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48 basic_block);
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49 extern vec<basic_block> get_dominated_by (enum cdi_direction, basic_block);
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50 extern vec<basic_block> get_dominated_by_region (enum cdi_direction,
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51 basic_block *,
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52 unsigned);
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53 extern vec<basic_block> get_dominated_to_depth (enum cdi_direction,
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54 basic_block, int);
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55 extern vec<basic_block> get_all_dominated_blocks (enum cdi_direction,
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56 basic_block);
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57 extern void redirect_immediate_dominators (enum cdi_direction, basic_block,
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58 basic_block);
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59 extern basic_block nearest_common_dominator (enum cdi_direction,
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60 basic_block, basic_block);
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61 extern basic_block nearest_common_dominator_for_set (enum cdi_direction,
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62 bitmap);
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63 extern bool dominated_by_p (enum cdi_direction, const_basic_block,
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64 const_basic_block);
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65 unsigned bb_dom_dfs_in (enum cdi_direction, basic_block);
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66 unsigned bb_dom_dfs_out (enum cdi_direction, basic_block);
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67 extern void verify_dominators (enum cdi_direction);
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68
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69 /* Verify invariants of computed dominance information, if internal consistency
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70 checks are enabled. */
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71
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72 static inline void
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73 checking_verify_dominators (cdi_direction dir)
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74 {
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75 if (flag_checking)
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76 verify_dominators (dir);
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77 }
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78
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79 basic_block recompute_dominator (enum cdi_direction, basic_block);
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80 extern void iterate_fix_dominators (enum cdi_direction,
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81 vec<basic_block> , bool);
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82 extern void add_to_dominance_info (enum cdi_direction, basic_block);
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83 extern void delete_from_dominance_info (enum cdi_direction, basic_block);
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84 extern basic_block first_dom_son (enum cdi_direction, basic_block);
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85 extern basic_block next_dom_son (enum cdi_direction, basic_block);
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86 extern enum dom_state dom_info_state (function *, enum cdi_direction);
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87 extern enum dom_state dom_info_state (enum cdi_direction);
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88 extern void set_dom_info_availability (enum cdi_direction, enum dom_state);
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89 extern bool dom_info_available_p (function *, enum cdi_direction);
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90 extern bool dom_info_available_p (enum cdi_direction);
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91
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92
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93
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94 #endif /* GCC_DOMINANCE_H */
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