tree-ssa-operands.c (add_virtual_operand): Only mark stores as has_volatile_ops if alias information is not available.

2007-09-09  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-operands.c (add_virtual_operand): Only mark
	stores as has_volatile_ops if alias information is not available.

	* gcc.c-torture/compile/20070906-1.c: New testcase.

From-SVN: r128300