[Bug target/113600] [14 regression] 525.x264_r run-time regresses by 8% with PGO -Ofast -march=znver4

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113600

--- Comment #6 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
Guess explicit .REDUC_PLUS instead of original VEC_PERM_EXPR somehow impacts
the store split decision.