https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66917
--- Comment #14 from rguenther at suse dot de <rguenther at suse dot de> --- On Thu, 30 Jul 2015, rearnsha at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66917 > > Richard Earnshaw <rearnsha at gcc dot gnu.org> changed: > > What |Removed |Added > ---------------------------------------------------------------------------- > Component|target |tree-optimization > > --- Comment #12 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- > > but the arm hook seems to say "yes, I can vectorize with V2DImode > > for a vector with element type unsigned long long > > __attribute__((aligned(1)))" > > which it obviously cannot. > > It can vectorize for this case, but the loads must not be marked as aligned > loads. That is, the mid-end must use the misaligned code hooks. > > So I don't think this is a target bug. Hmm, indeed. It's a vectorizer bug that always communicates at least element alignment (thus doesn't properly code-gen for the packed_p case)
