[Bug target/87767] Missing AVX512 memory broadcast for constant vector

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87767

--- Comment #7 from Hongtao.liu <crazylht at gmail dot com> ---
a patch is posted at
https://gcc.gnu.org/pipermail/gcc-patches/2020-July/549713.html