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[Bug tree-optimization/39299] wrong PTA for structure copies
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 26 Feb 2009 10:11:07 -0000
- Subject: [Bug tree-optimization/39299] wrong PTA for structure copies
- References: <bug-39299-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from rguenth at gcc dot gnu dot org 2009-02-26 10:11 -------
Subject: Bug 39299
Author: rguenth
Date: Thu Feb 26 10:10:52 2009
New Revision: 144446
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=144446
Log:
2009-02-26 Richard Guenther <rguenther@suse.de>
PR tree-optimization/39299
* tree-ssa-structalias.c (struct variable_info): Remove collapsed_to
member.
(get_varinfo_fc): Remove.
(new_var_info): Do not set collapsed_to.
(dump_constraint): Do not follow cycles.
(dump_constraint_graph): Likewise.
(build_pred_graph): Likewise.
(build_succ_graph): Likewise.
(rewrite_constraints): Likewise.
(do_simple_structure_copy): Remove.
(do_rhs_deref_structure_copy): Remove.
(do_lhs_deref_structure_copy): Remove.
(collapse_rest_of_var): Remove.
(do_structure_copy): Re-implement.
* gcc.dg/torture/pta-structcopy-1.c: New testcase.
Added:
branches/alias-improvements/gcc/testsuite/gcc.dg/torture/pta-structcopy-1.c
Modified:
branches/alias-improvements/gcc/ChangeLog.alias
branches/alias-improvements/gcc/tree-ssa-structalias.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39299