[Bug target/100310] [AVX512] Missing support for v{,p}expand* instructions that w/o mask operands

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100310

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
a patch is posted at
https://gcc.gnu.org/pipermail/gcc-patches/2021-April/569248.html