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.

From-SVN: r132899