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1 /* Header file for any pass which requires SSA routines.
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2 Copyright (C) 2013-2020 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_TREE_SSA_H
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21 #define GCC_TREE_SSA_H
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22
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23 /* Mapping for redirected edges. */
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24 struct edge_var_map {
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25 tree result; /* PHI result. */
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26 tree def; /* PHI arg definition. */
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27 location_t locus; /* PHI arg location. */
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28 };
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29
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30 /* A vector of var maps. */
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31 typedef vec<edge_var_map, va_heap, vl_embed> edge_var_map_vector;
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32
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33
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34 extern void redirect_edge_var_map_add (edge, tree, tree, location_t);
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35 extern void redirect_edge_var_map_clear (edge);
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36 extern void redirect_edge_var_map_dup (edge, edge);
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37 extern vec<edge_var_map> *redirect_edge_var_map_vector (edge);
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38 extern void redirect_edge_var_map_empty (void);
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39 extern edge ssa_redirect_edge (edge, basic_block);
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40 extern void flush_pending_stmts (edge);
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41 extern void gimple_replace_ssa_lhs (gimple *, tree);
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42 extern tree target_for_debug_bind (tree);
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43 extern void insert_debug_temp_for_var_def (gimple_stmt_iterator *, tree);
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44 extern void insert_debug_temps_for_defs (gimple_stmt_iterator *);
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45 extern void reset_debug_uses (gimple *);
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46 extern void release_defs_bitset (bitmap toremove);
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47 extern void verify_ssa (bool, bool);
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48 extern void init_tree_ssa (function *);
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49 extern void delete_tree_ssa (function *);
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50 extern bool tree_ssa_useless_type_conversion (tree);
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51 extern tree tree_ssa_strip_useless_type_conversions (tree);
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52
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53
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54 extern bool ssa_defined_default_def_p (tree t);
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55 extern bool ssa_undefined_value_p (tree, bool = true);
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56 extern bool gimple_uses_undefined_value_p (gimple *);
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57 extern void execute_update_addresses_taken (void);
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58
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59 /* Given an edge_var_map V, return the PHI arg definition. */
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60
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61 static inline tree
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62 redirect_edge_var_map_def (edge_var_map *v)
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63 {
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64 return v->def;
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65 }
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66
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67 /* Given an edge_var_map V, return the PHI result. */
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68
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69 static inline tree
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70 redirect_edge_var_map_result (edge_var_map *v)
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71 {
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72 return v->result;
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73 }
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74
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75 /* Given an edge_var_map V, return the PHI arg location. */
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76
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77 static inline location_t
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78 redirect_edge_var_map_location (edge_var_map *v)
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79 {
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80 return v->locus;
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81 }
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82
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83 /* Verify SSA invariants, if internal consistency checks are enabled. */
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84
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85 static inline void
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86 checking_verify_ssa (bool check_modified_stmt, bool check_ssa_operands)
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87 {
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88 if (flag_checking)
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89 verify_ssa (check_modified_stmt, check_ssa_operands);
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90 }
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91
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92 #endif /* GCC_TREE_SSA_H */
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