99 lines
3.6 KiB
C
99 lines
3.6 KiB
C
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/* Tree based points-to analysis
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Copyright (C) 2002, 2003 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 2 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; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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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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/* Number of function calls found in the program. */
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size_t num_calls_found;
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/* Number of const/pure function calls found in the program. */
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size_t num_pure_const_calls_found;
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/* Total number of virtual operands that will be needed to represent
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all the aliases of all the pointers found in the program. */
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long total_alias_vops;
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/* Variables that have been written to. */
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bitmap written_vars;
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/* Pointers that have been used in an indirect store operation. */
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bitmap dereferenced_ptrs_store;
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/* Pointers that have been used in an indirect load operation. */
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bitmap 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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/* Keep track of how many times each pointer has been dereferenced in
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the program using the aux variable. This is used by the alias
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grouping heuristic in compute_flow_insensitive_aliasing. */
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#define NUM_REFERENCES(ANN) ((size_t)((ANN)->common.aux))
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#define NUM_REFERENCES_CLEAR(ANN) ((ANN)->common.aux) = 0
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#define NUM_REFERENCES_INC(ANN) (ANN)->common.aux = (void*) (((size_t)((ANN)->common.aux)) + 1)
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#define NUM_REFERENCES_SET(ANN, VAL) (ANN)->common.aux = (void*) ((void *)(VAL))
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/* In tree-ssa-alias.c. */
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enum escape_type is_escape_site (tree);
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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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#endif /* TREE_SSA_STRUCTALIAS_H */
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