8sa1-gcc/gcc/tree-ssa-alias.h
Richard Guenther 7d6e252187 Makefile.in (tree-ssa-structalias.o): Remove gt-tree-ssa-structalias.h dependency.
2011-04-27  Richard Guenther  <rguenther@suse.de>

	* Makefile.in (tree-ssa-structalias.o): Remove
	gt-tree-ssa-structalias.h dependency.
	(GTFILES): Remove tree-ssa-structalias.c.
	* tree.c (allocate_decl_uid): New function.
	(make_node_stat): Use it.
	(copy_node_stat): Likewise.
	* tree.h (allocate_decl_uid): Declare.
	* tree-ssa-alias.h (delete_alias_heapvars): Remove.
	* tree-ssa.c (delete_tree_ssa): Do not call delete_alias_heapvars.
	* tree-flow.h (struct var_ann_d): Remove is_heapvar flag.
	* tree-ssa-live.c (remove_unused_locals): Do not check is_heapvar
	flag.
	* tree-ssa-structalias.c (heapvar_for_stmt): Remove.
	(struct heapvar_map): Likewise.
	(heapvar_map_eq, heapvar_map_hash, heapvar_lookup,
	heapvar_insert): Likewise.
	(make_heapvar_for): Rename to ...
	(make_heapvar): ... this.  Simplify.
	(fake_var_decl_obstack): New global var.
	(build_fake_var_decl): New function.
	(make_constraint_from_heapvar): Adjust.
	(handle_lhs_call): Likewise.
	(create_function_info_for): Likewise.
	(intra_create_variable_infos): Likewise.
	(init_alias_vars): Allocate fake_var_decl_obstack.
	(init_alias_heapvars, delete_alias_heapvars): Remove.
	(compute_points_to_sets): Do not call init_alias_heapvars.
	(ipa_pta_execute): Likewise.
	(delete_points_to_sets): Free fake_var_decl_obstack.

	* gcc.dg/tree-ssa/pr23382.c: Remove.

From-SVN: r173030
2011-04-27 14:16:49 +00:00

144 lines
5.1 KiB
C

/* Tree based alias analysis and alias oracle.
Copyright (C) 2008, 2010 Free Software Foundation, Inc.
Contributed by Richard Guenther <rguenther@suse.de>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, 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 TREE_SSA_ALIAS_H
#define TREE_SSA_ALIAS_H
#include "coretypes.h"
/* The points-to solution.
The points-to solution is a union of pt_vars and the abstract
sets specified by the flags. */
struct GTY(()) pt_solution
{
/* Nonzero if points-to analysis couldn't determine where this pointer
is pointing to. */
unsigned int anything : 1;
/* Nonzero if the points-to set includes any global memory. Note that
even if this is zero pt_vars can still include global variables. */
unsigned int nonlocal : 1;
/* Nonzero if the points-to set includes the local escaped solution by
reference. */
unsigned int escaped : 1;
/* Nonzero if the points-to set includes the IPA escaped solution by
reference. */
unsigned int ipa_escaped : 1;
/* Nonzero if the points-to set includes 'nothing', the points-to set
includes memory at address NULL. */
unsigned int null : 1;
/* Nonzero if the pt_vars bitmap includes a global variable. */
unsigned int vars_contains_global : 1;
/* Nonzero if the pt_vars bitmap includes a restrict tag variable. */
unsigned int vars_contains_restrict : 1;
/* Set of variables that this pointer may point to. */
bitmap vars;
};
/* Simplified and cached information about a memory reference tree.
Used by the alias-oracle internally and externally in alternate
interfaces. */
typedef struct ao_ref_s
{
/* The original full memory reference tree or NULL_TREE if that is
not available. */
tree ref;
/* The following fields are the decomposed reference as returned
by get_ref_base_and_extent. */
/* The base object of the memory reference or NULL_TREE if all of
the following fields are not yet computed. */
tree base;
/* The offset relative to the base. */
HOST_WIDE_INT offset;
/* The size of the access. */
HOST_WIDE_INT size;
/* The maximum possible extent of the access or -1 if unconstrained. */
HOST_WIDE_INT max_size;
/* The alias set of the access or -1 if not yet computed. */
alias_set_type ref_alias_set;
/* The alias set of the base object or -1 if not yet computed. */
alias_set_type base_alias_set;
} ao_ref;
/* In tree-ssa-alias.c */
extern void ao_ref_init (ao_ref *, tree);
extern void ao_ref_init_from_ptr_and_size (ao_ref *, tree, tree);
extern tree ao_ref_base (ao_ref *);
extern alias_set_type ao_ref_alias_set (ao_ref *);
extern bool ptr_deref_may_alias_global_p (tree);
extern bool ptr_derefs_may_alias_p (tree, tree);
extern bool refs_may_alias_p (tree, tree);
extern bool refs_may_alias_p_1 (ao_ref *, ao_ref *, bool);
extern bool refs_anti_dependent_p (tree, tree);
extern bool refs_output_dependent_p (tree, tree);
extern bool ref_maybe_used_by_stmt_p (gimple, tree);
extern bool stmt_may_clobber_ref_p (gimple, tree);
extern bool stmt_may_clobber_ref_p_1 (gimple, ao_ref *);
extern bool call_may_clobber_ref_p (gimple, tree);
extern bool stmt_kills_ref_p (gimple, tree);
extern tree get_continuation_for_phi (gimple, ao_ref *, bitmap *);
extern void *walk_non_aliased_vuses (ao_ref *, tree,
void *(*)(ao_ref *, tree, void *),
void *(*)(ao_ref *, tree, void *), void *);
extern unsigned int walk_aliased_vdefs (ao_ref *, tree,
bool (*)(ao_ref *, tree, void *),
void *, bitmap *);
extern struct ptr_info_def *get_ptr_info (tree);
extern void dump_alias_info (FILE *);
extern void debug_alias_info (void);
extern void dump_points_to_solution (FILE *, struct pt_solution *);
extern void dump_points_to_info_for (FILE *, tree);
extern void debug_points_to_info_for (tree);
extern void dump_alias_stats (FILE *);
/* In tree-ssa-structalias.c */
extern unsigned int compute_may_aliases (void);
extern bool pt_solution_empty_p (struct pt_solution *);
extern bool pt_solution_includes_global (struct pt_solution *);
extern bool pt_solution_includes (struct pt_solution *, const_tree);
extern bool pt_solutions_intersect (struct pt_solution *, struct pt_solution *);
extern bool pt_solutions_same_restrict_base (struct pt_solution *,
struct pt_solution *);
extern void pt_solution_reset (struct pt_solution *);
extern void pt_solution_set (struct pt_solution *, bitmap, bool, bool);
extern void pt_solution_set_var (struct pt_solution *, tree);
extern void dump_pta_stats (FILE *);
extern GTY(()) struct pt_solution ipa_escaped_pt;
#endif /* TREE_SSA_ALIAS_H */