https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71661
--- Comment #8 from Jeffrey A. Law <law at gcc dot gnu.org> --- Author: law Date: Thu Oct 6 16:23:22 2016 New Revision: 240836 URL: https://gcc.gnu.org/viewcvs?rev=240836&root=gcc&view=rev Log: PR tree-optimization/71661 * tree-cfgcleanup.c (remove_forwarder_block_with_phi): Handle case when removal of a forwarder exposes a new natural loop. PR tree-optimization/71661 * gcc.dg/tree-ssa/pr71661.c: New test. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/pr71661.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-cfgcleanup.c