https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71702
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Alexander Monakov from comment #3) > On 6/trunk, this issue is fixed or made latent by r230667 that added > > + STRIP_NOPS (t1); > + STRIP_NOPS (t2); > > to tree-vect-data-refs.c:compare_tree (patch submission here: > https://gcc.gnu.org/ml/gcc-patches/2015-11/msg02444.html ). > Should this change be backported to 4.9/5 now that an ICE is demonstrated? Yes, backporting this change is fine.