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From: "dberlin at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/29156] [4.2 Regression] Misscompilation with structs due to new struct alias Date: Thu, 19 Oct 2006 23:06:00 -0000 [thread overview] Message-ID: <20061019230613.11199.qmail@sourceware.org> (raw) In-Reply-To: <bug-29156-5077@http.gcc.gnu.org/bugzilla/> ------- Comment #8 from dberlin at gcc dot gnu dot org 2006-10-19 23:06 ------- Subject: Bug 29156 Author: dberlin Date: Thu Oct 19 23:05:53 2006 New Revision: 117891 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=117891 Log: 2006-10-19 Daniel Berlin <dberlin@dberlin.org> Fix PR tree-optimization/28778 Fix PR tree-optimization/29156 Fix PR tree-optimization/29415 * tree.h (DECL_PTA_ARTIFICIAL): New macro. (tree_decl_with_vis): Add artificial_pta_var flag. * tree-ssa-alias.c (is_escape_site): Remove alias info argument, pushed into callers. * tree-ssa-structalias.c (nonlocal_for_type): New variable. (nonlocal_all): Ditto. (struct variable_info): Add directly_dereferenced member. (var_escaped_vars): New variable. (escaped_vars_tree): Ditto. (escaped_vars_id): Ditto. (nonlocal_vars_id): Ditto. (new_var_info): Set directly_dereferenced. (graph_size): New variable (build_constraint_graph): Use graph_size. (solve_graph): Don't process constraints that cannot change the solution, don't try to propagate an empty solution to our successors. (process_constraint): Set directly_dereferenced. (could_have_pointers): New function. (get_constraint_for_component_ref): Don't process STRING_CST. (nonlocal_lookup): New function. (nonlocal_insert): Ditto. (create_nonlocal_var): Ditto. (get_nonlocal_id_for_type): Ditto. (get_constraint_for): Allow results vector to be empty in the case of string constants. Handle results of calls properly. (update_alias_info): Update alias info stats on number and type of calls. (find_func_aliases): Use could_have_pointers. (make_constraint_from_escaped): Renamed from make_constraint_to_anything, and changed to make constraints from escape variable. (make_constraint_to_escaped): New function. (find_global_initializers): Ditto. (create_variable_info_for): Make constraint from escaped to any global variable, and from any global variable to the set of escaped vars. (intra_create_variable_infos): Deal with escaped instead of pointing to anything. (set_uids_in_ptset): Do type pruning on directly dereferenced variables. (find_what_p_points_to): Adjust call to set_uids_with_ptset. (init_base_vars): Fix comment, and initialize escaped_vars. (need_to_solve): Removed. (find_escape_constraints): New function. (expand_nonlocal_solutions): Ditto. (compute_points_to_sets): Call find_escape_constraints and expand_nonlocal_solutions. (delete_points_to_sets): Don't fall off the end of the graph. (init_alias_heapvars): Initialize nonlocal_for_type and nonlocal_all. (delete_alias_heapvars): Free nonlocal_for_type and null out nonlocal_all. Added: trunk/gcc/testsuite/gcc.c-torture/execute/pr28778.c trunk/gcc/testsuite/gcc.c-torture/execute/pr29156.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/gcc.dg/tree-ssa/pta-fp.c trunk/gcc/tree-ssa-alias.c trunk/gcc/tree-ssa-operands.c trunk/gcc/tree-ssa-structalias.c trunk/gcc/tree-ssa-structalias.h trunk/gcc/tree.h -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29156
next prev parent reply other threads:[~2006-10-19 23:06 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2006-09-20 22:21 [Bug tree-optimization/29156] New: Misscompilation due to alias analysis rakdver at gcc dot gnu dot org 2006-09-20 22:26 ` [Bug tree-optimization/29156] [4.2 Regression] Misscompilation due to struct alias pinskia at gcc dot gnu dot org 2006-09-20 22:26 ` pinskia at gcc dot gnu dot org 2006-09-21 2:32 ` dberlin at gcc dot gnu dot org 2006-09-21 2:36 ` mmitchel at gcc dot gnu dot org 2006-09-21 4:06 ` pinskia at gcc dot gnu dot org 2006-09-21 4:23 ` [Bug tree-optimization/29156] [4.2 Regression] Misscompilation with structs due to new " pinskia at gcc dot gnu dot org 2006-09-21 12:15 ` dberlin at dberlin dot org 2006-09-21 12:22 ` rakdver at atrey dot karlin dot mff dot cuni dot cz 2006-10-13 17:51 ` dberlin at gcc dot gnu dot org 2006-10-19 23:06 ` dberlin at gcc dot gnu dot org [this message] 2006-10-19 23:07 ` dberlin at gcc dot gnu dot org
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