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

[Jack Poulson]

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?

Jack
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