tree-ssa-operands.c (add_stmt_operand): Do not mark stmts volatile when processing operands of an ADDR_EXPR.

2011-12-08  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-operands.c (add_stmt_operand): Do not mark stmts
	volatile when processing operands of an ADDR_EXPR.
	(get_indirect_ref_operands): Likewise.
	(get_tmr_operands): Likewise.
	(get_expr_operands): Likewise.

	* gcc.dg/volatile3.c: New testcase.

From-SVN: r182117