[Bug rtl-optimization/97286] simplified subreg used outside of the loop can cause conflict and cause an extra move inside the loop

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97286

--- Comment #18 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #14)
> SLSR is definitely the wrong place for this. This is more like an out of ssa.
> 
I put it in the SLSR, because the optimization sound like an loop strength
reduction to me.