[llvm] r273585 - Preserve DebugInfo when replacing values in DAGCombiner

[Ismail Donmez via llvm-commits]

Any luck with reproducing? This bug affects us really badly, we are
unable to produce a snapshot more than a month now :(

ismail

On Fri, Jul 22, 2016 at 9:57 AM, Ismail Donmez <ismail at i10z.com> wrote:
> Hi Nirav,
>
> On Thu, Jul 21, 2016 at 10:37 PM, Nirav Davé <niravd at google.com> wrote:
>> Ismall:
>>
>> I'm still having problems finding reproducing this corruption locally, but I
>> may have a patch. Can you check if this works?
>> If it doesn't, maybe you can spot what I'm doing wrong in my reproduction
>> steps.
>
> Sadly the patch didn't help. What I did to reproduce the crash was
> running the reproducer script from
> https://llvm.org/bugs/show_bug.cgi?id=28613 in a tight loop like:
>
> while true; do ./Loop-blabla.sh && sleep 1; done
>
> After it crashes I used the core file with gdb to debug. Of course
> you'll still need to export MALLOC_CHECK_ and MALLOC_PERTURB_
> beforehand.
>
> Regards,
> ismail