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

Renato Golin renato.golin at linaro.org
Fri Aug 29 00:51:03 PDT 2014

Thanks David, we'll get to the bottom of this, don't worry.

On 29 Aug 2014 01:18, "David Majnemer" <david.majnemer at gmail.com> wrote:

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