2011-08-03  Richard Guenther  <rguenther@suse.de>

	PR middle-end/49958
	* fold-const.c (fold_binary_loc): Only associate
	(+ (+ (* a b) c) (* d e)) as (+ (+ (* a b) (* d e)) c) if
	overflow wraps.

        * gcc.dg/torture/pr49958.c: New testcase.

From-SVN: r177270