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[Bug c++/34459] [4.1/4.3 Regression] incorrect code when compiled with optimization (-O1)
- From: "jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 20 Dec 2007 14:40:59 -0000
- Subject: [Bug c++/34459] [4.1/4.3 Regression] incorrect code when compiled with optimization (-O1)
- References: <bug-34459-15519@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from jakub at gcc dot gnu dot org 2007-12-20 14:40 -------
Subject: Bug 34459
Author: jakub
Date: Thu Dec 20 14:40:33 2007
New Revision: 131101
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=131101
Log:
PR c++/34459
* tree-ssa-dse.c (dse_optimize_stmt): Don't eliminate store if
USE_STMT not only stores into the same object as STMT, but might
read it too.
* gcc.c-torture/execute/20071219-1.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/20071219-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-dse.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34459