[Bug middle-end/123105] avx512 slows compile time by 2.5x vs avx2 in testcase with eigen

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123105

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This prepreocessed source does not work on the trunk :(
cc1plus: error: attribute ‘target’ argument ‘no-evex512’ is unknown