[Bug target/98461] Suboptimal codegen for negating a movemask

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98461

--- Comment #9 from Hongtao.liu <crazylht at gmail dot com> ---
> 128: https://godbolt.org/z/Exo3d9

zero_extend should be redudant, add another combine splitter for the bellow?

Failed to match this instruction:
(set (reg:SI 91 [ _6 ])
    (zero_extend:SI (subreg:HI (unspec:SI [
                    (subreg:V16QI (reg:V2DI 92) 0)
                ] UNSPEC_MOVMSK) 0)))