[Bug target/120456] __builtin_shuffle produces unnecessary vperm2i128

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120456

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Options: `-Ofast -mavx2 -std=c++23`.


Next time please attach the compilable testcase (or place it inline) and not
just a code snip. Also add the options you are using.