https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104413
--- Comment #2 from Hongtao.liu <crazylht at gmail dot com> ---
(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.
w/ -msse4 gcc generates ideal instructions sequence
movd %edi, %xmm0
pxor %xmm1, %xmm1
pshufb %xmm1, %xmm0
