/* Header file for any pass which requires SSA routines.
   Copyright (C) 2013 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

#include "tree-flow.h"
#include "tree-ssanames.h"

/* Mapping for redirected edges.  */
struct _edge_var_map {
  tree result;			/* PHI result.  */
  tree def;			/* PHI arg definition.  */
  source_location locus;        /* PHI arg location.  */
};
typedef struct _edge_var_map edge_var_map;

/* 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, source_location);
extern void redirect_edge_var_map_clear (edge);
extern void redirect_edge_var_map_dup (edge, edge);
extern edge_var_map_vector *redirect_edge_var_map_vector (edge);
extern void redirect_edge_var_map_destroy (void);
extern edge ssa_redirect_edge (edge, basic_block);
extern void flush_pending_stmts (edge);
extern void count_uses_and_derefs (tree, gimple, unsigned *, unsigned *,
				   unsigned *);
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);
extern void init_tree_ssa (struct function *);
extern void delete_tree_ssa (void);
extern bool tree_ssa_useless_type_conversion (tree);
extern tree tree_ssa_strip_useless_type_conversions (tree);

extern bool ssa_undefined_value_p (tree);
extern void execute_update_addresses_taken (void);

/* Given an edge_var_map V, return the PHI arg definition.  */

static inline tree
redirect_edge_var_map_def (edge_var_map *v)
{
  return v->def;
}

/* Given an edge_var_map V, return the PHI result.  */

static 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.  */

static inline source_location
redirect_edge_var_map_location (edge_var_map *v)
{
  return v->locus;
}


#endif /* GCC_TREE_SSA_H */