[Bug target/118996] Should TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P return false for x86-64?

[liuhongt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118996

--- Comment #16 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
(In reply to Hongtao Liu from comment #14)
> (In reply to H.J. Lu from comment #13)
> > (In reply to H.J. Lu from comment #11)
> > > Created attachment 60609 [details]
> > > An untested patch
> > 
> > Hongtao, do you have SPEC CPU2017 data on this patch?
> 
> I haven't since #c9, assume the new patch fix the issue?
> I'll start a test.

No big impact(all benchmarks are in <1% change) for both -march=x86-64-v3 -O2
and -march=icelaker-server -Ofast -funroll-loops -flto on ICX.