[Bug target/120957] [16 Regression] 6% slowdown of 503.bwaves_r on Zen2 since r16-1647-gc06979ff957485

[pheeck at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120957

--- Comment #7 from Filip Kastl <pheeck at gcc dot gnu.org> ---
Alright, I'll create a separate Zen3 PR.  Let this PR be about the Zen2
slowdown.