https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104413
--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #2)
> (In reply to Hongtao.liu from comment #1)
> > Just note pshufb needs SSE3, and it seems reasonable to define a SSE3
> > broadcast pattern which generates pxor + pshufb.
>
It's SSSE3 not SSE3. :(
So it looks optimal with -mssse3
movd %edi, %xmm0
pxor %xmm1, %xmm1;
pshufb %xmm1, %xmm0
