[Bug target/102868] Missed optimization with __builtin_shuffle and zero vector on ppc

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102868

--- Comment #1 from luoxhu at gcc dot gnu.org ---
Patch submitted: 
https://gcc.gnu.org/pipermail/gcc-patches/2021-October/582452.html