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[Bug tree-optimization/35472] [4.3 Regression] tree DSE is broken
- 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: 7 Mar 2008 09:47:52 -0000
- Subject: [Bug tree-optimization/35472] [4.3 Regression] tree DSE is broken
- References: <bug-35472-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #5 from rguenth at gcc dot gnu dot org 2008-03-07 09:47 -------
Subject: Bug 35472
Author: rguenth
Date: Fri Mar 7 09:47:06 2008
New Revision: 133004
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=133004
Log:
2008-03-07 Richard Guenther <rguenther@suse.de>
PR tree-optimization/35472
* tree-ssa-dse.c (dse_optimize_stmt): Do not delete a store
whose single use_stmt has a overlapping set of loaded and
stored symbols as that use_stmt might be a noop assignment then.
* gcc.c-torture/execute/pr35472.c: New testcase.
Added:
branches/gcc-4_3-branch/gcc/testsuite/gcc.c-torture/execute/pr35472.c
- copied unchanged from r132899,
trunk/gcc/testsuite/gcc.c-torture/execute/pr35472.c
Modified:
branches/gcc-4_3-branch/gcc/ChangeLog
branches/gcc-4_3-branch/gcc/testsuite/ChangeLog
branches/gcc-4_3-branch/gcc/tree-ssa-dse.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35472