[Bug target/86735] [8/9 Regression] Bad wrong-code bug with "-march=skylake-avx512 -Ofast"

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86735
--- Comment #15 from H.J. Lu <hjl.tools at gmail dot com> ---
I can no longer reproduce it under kernel 4.17.11.