-load-combine status request

[Eric Christopher via llvm-commits]

Okay, thanks for the update.

On Thu, Sep 24, 2015, 10:34 PM Michael Spencer <bigcheesegs at gmail.com>
wrote:

> On Thu, Sep 24, 2015 at 12:12 PM, Eric Christopher <echristo at gmail.com>
> wrote:
> > Hi Michael,
> >
> >>
> >> > I notice that the -load-combine pass is not being used since its
> initial
> >> > commit in r209791.
> >> > What's the status on this? Should it be removed? Are there any plan to
> >> > use
> >> > it at some point in the future?
> >> >
> >> > Thanks,
> >> > -- Larisse.
> >>
> >> It's waiting for a machine pass to do load slicing to be enabled by
> >> default. I've been planning on doing this, but it's not going to
> >> happen soon.
> >>
> >
> > So, what would you like to do then? :)
> >
> > It's been pretty much dead code since it was committed more than a year
> ago
> > and we try to avoid keeping dead code in tree. It's not a ton of work to
> > keep it updated, but that's all that's happened to the pass in the mean
> time
> > and we don't have any idea when it might be usable.
> >
> > Thoughts?
> >
> > -eric
>
> So it actually appears that someone has written a load slicer since
> that went in. I'll figure out next week if it fixes the performance
> problems I was encountering before and hopefully turn it on. If not
> I'm fine with removing it.
>
> - Michael Spencer
>
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