[Bug target/101611] AVX2 vector arithmetic shift lowered to scalar unnecessarily

[glisse at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101611

--- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> for arithmetic V[24]DImode >> V[24]DImode
> logical ((x >> y) ^ (0x8000000000000000ULL >> y)) - (0x8000000000000000ULL
> >> y)
> can be used.

I guess it would be complicated to try and implement this fallback strategy in
a generic way so other modes/targets could benefit.