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/* Header file for any pass which requires SSA routines.
Copyright (C) 2013-2023 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_TREE_SSA_H
#define GCC_TREE_SSA_H
/* Mapping for redirected edges. */
struct edge_var_map {
tree result; /* PHI result. */
tree def; /* PHI arg definition. */
location_t locus; /* PHI arg location. */
};
/* A vector of var maps. */
typedef vec<edge_var_map, va_heap, vl_embed> edge_var_map_vector;
extern void redirect_edge_var_map_add (edge, tree, tree, location_t);
extern void redirect_edge_var_map_clear (edge);
extern void redirect_edge_var_map_dup (edge, edge);
extern vec<edge_var_map> *redirect_edge_var_map_vector (edge);
extern void redirect_edge_var_map_empty (void);
extern edge ssa_redirect_edge (edge, basic_block);
extern void flush_pending_stmts (edge);
extern void gimple_replace_ssa_lhs (gimple *, tree);
extern tree target_for_debug_bind (tree);
extern void insert_debug_temp_for_var_def (gimple_stmt_iterator *, tree);
extern void insert_debug_temps_for_defs (gimple_stmt_iterator *);
extern void reset_debug_uses (gimple *);
extern void release_defs_bitset (bitmap toremove);
extern void verify_ssa (bool, bool);
extern void init_tree_ssa (function *, int size = 0);
extern void delete_tree_ssa (function *);
extern bool tree_ssa_useless_type_conversion (tree);
extern tree tree_ssa_strip_useless_type_conversions (tree);
extern tree find_released_ssa_name (tree *, int *, void *);
extern bool ssa_defined_default_def_p (tree t);
extern bool ssa_undefined_value_p (tree, bool = true);
bool ssa_name_any_use_dominates_bb_p (tree var, basic_block bb);
extern void mark_ssa_maybe_undefs (void);
/* Return TRUE iff VAR is marked as maybe-undefined. See
mark_ssa_maybe_undefs. */
inline bool
ssa_name_maybe_undef_p (tree var)
{
gcc_checking_assert (TREE_CODE (var) == SSA_NAME);
return TREE_VISITED (var);
}
/* Set (or clear, depending on VALUE) VAR's maybe-undefined mark. */
inline void
ssa_name_set_maybe_undef (tree var, bool value = true)
{
gcc_checking_assert (TREE_CODE (var) == SSA_NAME);
TREE_VISITED (var) = value;
}
extern void execute_update_addresses_taken (void);
/* Given an edge_var_map V, return the PHI arg definition. */
inline tree
redirect_edge_var_map_def (edge_var_map *v)
{
return v->def;
}
/* Given an edge_var_map V, return the PHI result. */
inline tree
redirect_edge_var_map_result (edge_var_map *v)
{
return v->result;
}
/* Given an edge_var_map V, return the PHI arg location. */
inline location_t
redirect_edge_var_map_location (edge_var_map *v)
{
return v->locus;
}
/* Verify SSA invariants, if internal consistency checks are enabled. */
inline void
checking_verify_ssa (bool check_modified_stmt, bool check_ssa_operands)
{
if (flag_checking)
verify_ssa (check_modified_stmt, check_ssa_operands);
}
#endif /* GCC_TREE_SSA_H */
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