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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [tree-ssa-structalias.h] - Rev 847
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/* Tree based points-to analysis Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. Contributed by Daniel Berlin <dberlin@dberlin.org> 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_STRUCTALIAS_H #define TREE_SSA_STRUCTALIAS_H /* True if the data pointed to by PTR can alias anything. */ #define PTR_IS_REF_ALL(PTR) TYPE_REF_CAN_ALIAS_ALL (TREE_TYPE (PTR)) struct constraint; typedef struct constraint *constraint_t; /* Alias information used by compute_may_aliases and its helpers. */ struct alias_info { /* SSA names visited while collecting points-to information. If bit I is set, it means that SSA variable with version I has already been visited. */ sbitmap ssa_names_visited; /* Array of SSA_NAME pointers processed by the points-to collector. */ VEC(tree,heap) *processed_ptrs; /* ADDRESSABLE_VARS contains all the global variables and locals that have had their address taken. */ struct alias_map_d **addressable_vars; size_t num_addressable_vars; /* POINTERS contains all the _DECL pointers with unique memory tags that have been referenced in the program. */ struct alias_map_d **pointers; size_t num_pointers; /* Number of function calls found in the program. */ size_t num_calls_found; /* Number of const/pure function calls found in the program. */ size_t num_pure_const_calls_found; /* Total number of virtual operands that will be needed to represent all the aliases of all the pointers found in the program. */ long total_alias_vops; /* Variables that have been written to. */ bitmap written_vars; /* Pointers that have been used in an indirect store operation. */ bitmap dereferenced_ptrs_store; /* Pointers that have been used in an indirect load operation. */ bitmap dereferenced_ptrs_load; /* Memory tag for all the PTR_IS_REF_ALL pointers. */ tree ref_all_symbol_mem_tag; }; /* Keep track of how many times each pointer has been dereferenced in the program using the aux variable. This is used by the alias grouping heuristic in compute_flow_insensitive_aliasing. */ #define NUM_REFERENCES(ANN) ((size_t)((ANN)->common.aux)) #define NUM_REFERENCES_CLEAR(ANN) ((ANN)->common.aux) = 0 #define NUM_REFERENCES_INC(ANN) (ANN)->common.aux = (void*) (((size_t)((ANN)->common.aux)) + 1) #define NUM_REFERENCES_SET(ANN, VAL) (ANN)->common.aux = (void*) ((void *)(VAL)) /* In tree-ssa-alias.c. */ enum escape_type is_escape_site (tree); /* In tree-ssa-structalias.c. */ extern void compute_points_to_sets (struct alias_info *); extern void delete_points_to_sets (void); extern void dump_constraint (FILE *, constraint_t); extern void dump_constraints (FILE *); extern void debug_constraint (constraint_t); extern void debug_constraints (void); extern void dump_solution_for_var (FILE *, unsigned int); extern void debug_solution_for_var (unsigned int); extern void dump_sa_points_to_info (FILE *); extern void debug_sa_points_to_info (void); #endif /* TREE_SSA_STRUCTALIAS_H */
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