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

[hjl.tools at gmail dot com]

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

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #3)
> (In reply to Uroš Bizjak from comment #1)
> >       return TARGET_AVX && !TARGET_AVX512F
> 
> Should !TARGET_AVX512F be changed to !TARGET_AVX152ER in gate function?

Yes, the untested patch is updated.