[Bug target/82942] Generate vzeroupper with -mavx512f -mno-avx512er -O2

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82942

--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Uroš Bizjak from comment #1)
>       return TARGET_AVX && !TARGET_AVX512F

Should !TARGET_AVX512F be changed to !TARGET_AVX152ER in gate function?