re PR tree-optimization/69467 (Pattern X * C1 CMP 0 to X CMP 0 causes performance drop on 32-bit x86.)

2016-01-26  Richard Biener  <rguenther@suse.de>

	PR middle-end/69467
	* match.pd: Guard X * CST CMP 0 pattern with single_use.

From-SVN: r232821