tree-ssa.h revision 1.4 
1/* Header file for any pass which requires SSA routines.
2   Copyright (C) 2013-2018 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 for more details.
15
16You should have received a copy of the GNU General Public License
17along 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.  */
24struct edge_var_map {
25  tree result;			/* PHI result.  */
26  tree def;			/* PHI arg definition.  */
27  source_location locus;        /* PHI arg location.  */
28};
29
30/* A vector of var maps.  */
31typedef vec<edge_var_map, va_heap, vl_embed> edge_var_map_vector;
32
33
34extern void redirect_edge_var_map_add (edge, tree, tree, source_location);
35extern void redirect_edge_var_map_clear (edge);
36extern void redirect_edge_var_map_dup (edge, edge);
37extern vec<edge_var_map> *redirect_edge_var_map_vector (edge);
38extern void redirect_edge_var_map_empty (void);
39extern edge ssa_redirect_edge (edge, basic_block);
40extern void flush_pending_stmts (edge);
41extern void gimple_replace_ssa_lhs (gimple *, tree);
42extern tree target_for_debug_bind (tree);
43extern void insert_debug_temp_for_var_def (gimple_stmt_iterator *, tree);
44extern void insert_debug_temps_for_defs (gimple_stmt_iterator *);
45extern void reset_debug_uses (gimple *);
46extern void release_defs_bitset (bitmap toremove);
47extern void verify_ssa (bool, bool);
48extern void init_tree_ssa (function *);
49extern void delete_tree_ssa (function *);
50extern bool tree_ssa_useless_type_conversion (tree);
51extern tree tree_ssa_strip_useless_type_conversions (tree);
52
53
54extern bool ssa_defined_default_def_p (tree t);
55extern bool ssa_undefined_value_p (tree, bool = true);
56extern bool gimple_uses_undefined_value_p (gimple *);
57extern void execute_update_addresses_taken (void);
58
59/* Given an edge_var_map V, return the PHI arg definition.  */
60
61static inline tree
62redirect_edge_var_map_def (edge_var_map *v)
63{
64  return v->def;
65}
66
67/* Given an edge_var_map V, return the PHI result.  */
68
69static inline tree
70redirect_edge_var_map_result (edge_var_map *v)
71{
72  return v->result;
73}
74
75/* Given an edge_var_map V, return the PHI arg location.  */
76
77static inline source_location
78redirect_edge_var_map_location (edge_var_map *v)
79{
80  return v->locus;
81}
82
83/* Verify SSA invariants, if internal consistency checks are enabled.  */
84
85static inline void
86checking_verify_ssa (bool check_modified_stmt, bool check_ssa_operands)
87{
88  if (flag_checking)
89    verify_ssa (check_modified_stmt, check_ssa_operands);
90}
91
92#endif /* GCC_TREE_SSA_H */
93