r133004 - in /branches/gcc-4_3-branch/gcc: Chan...

[rguenth@gcc.gnu.org]

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