https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67221
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> --- Author: rguenth Date: Mon Aug 17 14:17:33 2015 New Revision: 226938 URL: https://gcc.gnu.org/viewcvs?rev=226938&root=gcc&view=rev Log: 2015-08-17 Richard Biener <rguent...@suse.de> PR tree-optimization/67221 * tree-ssa-sccvn.c (visit_phi): Keep all-TOP args TOP. (sccvn_dom_walker::before_dom_children): Mark backedges of non-executable blocks as not executable. * gcc.dg/torture/pr67221.c: New testcase. Added: trunk/gcc/testsuite/gcc.dg/torture/pr67221.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-sccvn.c