https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80815
--- Comment #2 from rguenther at suse dot de <rguenther at suse dot de> --- On Fri, 19 May 2017, amker at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80815 > > --- Comment #1 from amker at gcc dot gnu.org --- > GCC uses vect_factor as minimal segment length for dr_b when merging alias > pairs, I think it could be relaxed to vect_factor * abs (DR_STEP (dr_b)). > Below test shows this change can merge additional alias checks: But it would make cases aliasing that are not (that's always a trade off between more precise result and less runtime checking).
