[Bug tree-optimization/101621] gcc cannot optimize int8_t vector assign with subscription to shuffle

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101621

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Severity|normal                      |enhancement

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The cast issue is because in GCC 9, it was not producing PERM at the gimple
level which was fixed correctly in GCC 11.

clang_shuffle_with_zero can easy be added.