83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
/* Tree based points-to analysis
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Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc.
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Contributed by Daniel Berlin <dberlin@dberlin.org>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef TREE_SSA_STRUCTALIAS_H
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#define TREE_SSA_STRUCTALIAS_H
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/* True if the data pointed to by PTR can alias anything. */
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#define PTR_IS_REF_ALL(PTR) TYPE_REF_CAN_ALIAS_ALL (TREE_TYPE (PTR))
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struct constraint;
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typedef struct constraint *constraint_t;
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/* Alias information used by compute_may_aliases and its helpers. */
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struct alias_info
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{
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/* SSA names visited while collecting points-to information. If bit I
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is set, it means that SSA variable with version I has already been
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visited. */
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sbitmap ssa_names_visited;
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/* Array of SSA_NAME pointers processed by the points-to collector. */
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VEC(tree,heap) *processed_ptrs;
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/* ADDRESSABLE_VARS contains all the global variables and locals that
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have had their address taken. */
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struct alias_map_d **addressable_vars;
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size_t num_addressable_vars;
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/* POINTERS contains all the _DECL pointers with unique memory tags
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that have been referenced in the program. */
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struct alias_map_d **pointers;
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size_t num_pointers;
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/* Variables that have been written to directly (i.e., not through a
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pointer dereference). */
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struct pointer_set_t *written_vars;
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/* Pointers that have been used in an indirect store operation. */
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struct pointer_set_t *dereferenced_ptrs_store;
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/* Pointers that have been used in an indirect load operation. */
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struct pointer_set_t *dereferenced_ptrs_load;
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/* Memory tag for all the PTR_IS_REF_ALL pointers. */
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tree ref_all_symbol_mem_tag;
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};
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/* In tree-ssa-alias.c. */
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enum escape_type is_escape_site (tree);
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void update_mem_sym_stats_from_stmt (tree, tree, long, long);
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/* In tree-ssa-structalias.c. */
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extern void compute_points_to_sets (struct alias_info *);
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extern void delete_points_to_sets (void);
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extern void dump_constraint (FILE *, constraint_t);
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extern void dump_constraints (FILE *);
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extern void debug_constraint (constraint_t);
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extern void debug_constraints (void);
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extern void dump_solution_for_var (FILE *, unsigned int);
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extern void debug_solution_for_var (unsigned int);
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extern void dump_sa_points_to_info (FILE *);
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extern void debug_sa_points_to_info (void);
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extern void set_used_smts (void);
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#endif /* TREE_SSA_STRUCTALIAS_H */
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