[Llvm-bgq-discuss] Details behind MPI wrapper for bgclang++

[Jack Poulson]

On Fri, Mar 1, 2013 at 1:03 PM, Jack Poulson <jack.poulson at gmail.com> wrote:

> On Fri, Mar 1, 2013 at 12:43 PM, Hal Finkel <hfinkel at anl.gov> wrote:
>
>> The lightweight core files are really text files, I looked at the line:
>> While executing instruction at..........0x000000000100c7c4
>>
>> Then I ran powerpc64-bgq-linux-objdump -C -d Backproj-2d and looked at
>> the assembly around address 100c7c4 (if you search for it in the file, note
>> that objdump may omit the leading 0s in the address).
>>
>>
> Thanks!
>
>
>> Can you try compiling/linking with
>> /home/projects/llvm/r175919-20130222/bin/bgclang++ instead of the default
>> one; this is a newer build and I'd like to see if it still has whatever bug
>> is yielding this miscompile.
>>
>
> Strangely enough, my executable ran correctly with the new version of LLVM
> (and passed my accuracy tests). I'm rerunning it again right now to help
> rule out whether or not that was a fluke.
>
> Any ideas as to what might have been the major change in the new release?
>
>
Sigh. It was a fluke.

Perhaps we should take this offline to avoid spamming everyone else on the
list? I will try linking statically next.

Jack
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