[Bug target/120941] [16 Regression] 24-40% slowdown of 519.lbm_r on Zen2 and 470.lbm on Zen5 since r16-1644-gaba3b9d3a48a07

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120941

--- Comment #12 from Filip Kastl <pheeck at gcc dot gnu.org> ---
As I've commented in pr120957, I've also bisected 9% Zen3 -Ofast -march=native
slowdown to this commit.  That slowdown can also be solved by applying the
patch hjl has provided.