[Bug target/123524] [16 Regression] 6% performance regression in gcc-16 compared to gcc-15 when compiling an interpreter

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123524

--- Comment #7 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #6)
> (In reply to Hongtao Liu from comment #4)
> > Maybe related to r16-1644-gaba3b9d3a48a07, it tries to do some CSE for
> > vector broadcast from constant, the optimization is before RA.
> 
> If so then this is a target issue.

The extra spill comes from this, but not sure if it caused the regression.
After all, this spill is outside the loop.
Need to profile the benchmark to rootcause the regression.