https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70157
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #2)
> (In reply to H.J. Lu from comment #1)
> > It is due to TARGET_SSE_TYPELESS_STORES.
>
> This is by design, movaps/movups is one byte shorter than movdqa/movdqu.
movdqu y(%rip), %xmm0 <<<< Shouldn't movups be used here?
movups %xmm0, x(%rip)
