https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69671
--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> --- Given the relevance of AVX512 for the GCC 6 lifetime I'd rather not revert the CSE change and penaltize ARM. If we can come up with a good fix for the x86 backend now or in GCC 7 time we can backport that to GCC 6 later as well. So ... XFAIL?