[Bug target/98167] [x86] Failure to optimize operation on indentically shuffled operands into a shuffle of the result of the operation

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98167

--- Comment #8 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #4)
> We already handle IX86_BUILTIN_SHUFPD there but not IX86_BUILTIN_SHUFPS for
> some reason.

https://gcc.gnu.org/pipermail/gcc-patches/2019-May/521983.html
I was checking with just one builtin if this was the right approach, and never
got to extend it to others, sorry. Handling shufps in a similar way seems good
to me, if anyone has time to do it.