[llvm] r216523 - InstCombine: Optimize GEP's involving ptrtointbetter

David Majnemer david.majnemer at gmail.com
Thu Aug 28 17:18:05 PDT 2014

On Thu, Aug 28, 2014 at 4:26 PM, Renato Golin <renato.golin at linaro.org>

> On 28 August 2014 23:52, David Majnemer <david.majnemer at gmail.com> wrote:
> > I'd be all for reverting it if we had LLVM IR that we can commit with the
> > revert which shows the problem.
> > Better yet, I could fix the bug if I had the problematic IR.
> I'm not sure that's how it works...
> I have limited time to investigate the problem and bisecting and
> debugging on ARM is not particularly easy, as I'm sure is the same on
> MIPS. Lots of bots are broken because of this patch for several days
> already. Normally, when that happens, whomever committed the patch
> reverts it and works with the affected people (me, Doug, Nuno) to
> solve the issue, while the bots are back to green.
> Since it might be a while to investigate this problem on the diverse
> architectures, keeping the bots red, for what could be several more
> days, for a not that critical patch is poor judgement, indeed. This
> simplification can give you some edge on some corner case but it's not
> at all worth having multiple bots red because of it.

I've reverted this with r216698, I'd appreciate it if we could eventually
get some IR though.

> cheers,
> --renato
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