r132899 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Mar  5 16:13:04 2008
New Revision: 132899

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=132899
Log:
2008-03-05  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:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr35472.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-dse.c