[Bug tree-optimization/57534] [6/7/8 Regression]: Performance regression versus 4.7.3, 4.8.1 is ~15% slower

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57534

--- Comment #23 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
(In reply to amker from comment #22)

> > So my suggestion would be to see if you can make SLSR generate
> > TARGET_MEM_REFs
> > based on some common infrastructure with IVOPTs.
> Yes, I also believe strength reduction infrastructure in IVOPTs could be
> (easily?) extended to cover this case.  Either export interface from IVOPTs
> and do it in SLSR etc., or simply handle such loops specially in IVOPTs it
> self.  Then it would be something like vect vs slp.  I have time now and can
> play with this idea.

Bin, do you want to take over the PR?