1 | /* Header file for any pass which requires SSA routines. |
2 | Copyright (C) 2013-2023 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_TREE_SSA_H |
21 | #define GCC_TREE_SSA_H |
22 | |
23 | /* Mapping for redirected edges. */ |
24 | struct edge_var_map { |
25 | tree result; /* PHI result. */ |
26 | tree def; /* PHI arg definition. */ |
27 | location_t locus; /* PHI arg location. */ |
28 | }; |
29 | |
30 | /* A vector of var maps. */ |
31 | typedef vec<edge_var_map, va_heap, vl_embed> edge_var_map_vector; |
32 | |
33 | |
34 | extern void redirect_edge_var_map_add (edge, tree, tree, location_t); |
35 | extern void redirect_edge_var_map_clear (edge); |
36 | extern void redirect_edge_var_map_dup (edge, edge); |
37 | extern vec<edge_var_map> *redirect_edge_var_map_vector (edge); |
38 | extern void redirect_edge_var_map_empty (void); |
39 | extern edge ssa_redirect_edge (edge, basic_block); |
40 | extern void flush_pending_stmts (edge); |
41 | extern void gimple_replace_ssa_lhs (gimple *, tree); |
42 | extern tree target_for_debug_bind (tree); |
43 | extern void insert_debug_temp_for_var_def (gimple_stmt_iterator *, tree); |
44 | extern void insert_debug_temps_for_defs (gimple_stmt_iterator *); |
45 | extern void reset_debug_uses (gimple *); |
46 | extern void release_defs_bitset (bitmap toremove); |
47 | extern void verify_ssa (bool, bool); |
48 | extern void init_tree_ssa (function *, int size = 0); |
49 | extern void delete_tree_ssa (function *); |
50 | extern bool tree_ssa_useless_type_conversion (tree); |
51 | extern tree tree_ssa_strip_useless_type_conversions (tree); |
52 | extern tree find_released_ssa_name (tree *, int *, void *); |
53 | |
54 | |
55 | extern bool ssa_defined_default_def_p (tree t); |
56 | extern bool ssa_undefined_value_p (tree, bool = true); |
57 | |
58 | |
59 | bool ssa_name_any_use_dominates_bb_p (tree var, basic_block bb); |
60 | extern void mark_ssa_maybe_undefs (void); |
61 | |
62 | /* Return TRUE iff VAR is marked as maybe-undefined. See |
63 | mark_ssa_maybe_undefs. */ |
64 | |
65 | inline bool |
66 | ssa_name_maybe_undef_p (tree var) |
67 | { |
68 | gcc_checking_assert (TREE_CODE (var) == SSA_NAME); |
69 | return TREE_VISITED (var); |
70 | } |
71 | |
72 | /* Set (or clear, depending on VALUE) VAR's maybe-undefined mark. */ |
73 | |
74 | inline void |
75 | ssa_name_set_maybe_undef (tree var, bool value = true) |
76 | { |
77 | gcc_checking_assert (TREE_CODE (var) == SSA_NAME); |
78 | TREE_VISITED (var) = value; |
79 | } |
80 | |
81 | |
82 | extern void execute_update_addresses_taken (void); |
83 | |
84 | /* Given an edge_var_map V, return the PHI arg definition. */ |
85 | |
86 | inline tree |
87 | redirect_edge_var_map_def (edge_var_map *v) |
88 | { |
89 | return v->def; |
90 | } |
91 | |
92 | /* Given an edge_var_map V, return the PHI result. */ |
93 | |
94 | inline tree |
95 | redirect_edge_var_map_result (edge_var_map *v) |
96 | { |
97 | return v->result; |
98 | } |
99 | |
100 | /* Given an edge_var_map V, return the PHI arg location. */ |
101 | |
102 | inline location_t |
103 | redirect_edge_var_map_location (edge_var_map *v) |
104 | { |
105 | return v->locus; |
106 | } |
107 | |
108 | /* Verify SSA invariants, if internal consistency checks are enabled. */ |
109 | |
110 | inline void |
111 | checking_verify_ssa (bool check_modified_stmt, bool check_ssa_operands) |
112 | { |
113 | if (flag_checking) |
114 | verify_ssa (check_modified_stmt, check_ssa_operands); |
115 | } |
116 | |
117 | #endif /* GCC_TREE_SSA_H */ |
118 | |