[Bug target/84490] [8/9 regression] 436.cactusADM regressed by 6-8% percent with -Ofast on Zen and Haswell, compared to gcc 7.2

[jamborm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84490

--- Comment #10 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I should have my own numbers only in January, but according to
https://lnt.opensuse.org/db_default/v4/SPEC/spec_report/branch there
is a 7% regression at -Ofast and generic march/mtune on Zen.