[Bug target/121991] [16 Regression] 15% slowdown of 436.cactusADM and 7% slowdown of 410.bwaves on Aarch64

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121991

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There was a few vector cost model difference between those 2 revisions
especially dealing with aarch64 cost model.