https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66739
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> --- Author: rguenth Date: Tue Jul 7 07:46:57 2015 New Revision: 225502 URL: https://gcc.gnu.org/viewcvs?rev=225502&root=gcc&view=rev Log: 2015-07-07 Richard Biener <rguent...@suse.de> PR middle-end/66739 * match.pd: Condition A - B ==/!= 0 -> A ==/!= B on single-use A - B. Modified: trunk/gcc/ChangeLog trunk/gcc/match.pd