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.