https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66142
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 35596 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35596&action=edit gcc6-pr66142.patch Fix for the ifcvt issue. With this the modified testcase is vectorized.