https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46590
--- Comment #46 from Jeffrey A. Law <law at gcc dot gnu.org> --- Author: law Date: Thu Dec 10 19:40:23 2015 New Revision: 231542 URL: https://gcc.gnu.org/viewcvs?rev=231542&root=gcc&view=rev Log: PR tree-optimization/61515 PR tree-optimization/46590 Backport from mainline. * tree-ssa-threadedge.c (invalidate_equivalences): Walk the unwinding stack rather than looking at every SSA_NAME's value. Modified: branches/gcc-4_9-branch/gcc/ChangeLog branches/gcc-4_9-branch/gcc/tree-ssa-threadedge.c