[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 #25 from Filip Kastl <pheeck at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #24)
> Why is it bad for znver2?

Oh, I thought we are trying to figure that out.  Spilling because of register
pressure, as richi suggested in comment 3, is the best guess we currently have.

I'll see if I can confirm that there is some extra spilling.