[LLVMdev] DebugAA, GVN bug?

Will Dietz willdtz at gmail.com
Fri Jul 9 13:47:00 PDT 2010

Filed bug report, sorry for the noise.


On Thu, Jul 8, 2010 at 1:09 PM, Will Dietz <willdtz at gmail.com> wrote:
> Hi all,
> While testing my own AA, I found it being queried for values that
> didn't exist previously.  Luckily there's a pass built into LLVM for
> catching such things, "Debug-AA", and I used that to confirm that GVN
> does this fairly frequently.
> I've attached a test case that triggers the bug (reduced from
> Stanford/Treesort, for whatever that's worth), this is on LLVM 2.7.
> Should this be filed as a bug....?
> Additionally it just seems.. /unfortunate/ that we have a pass
> specifically designed to catch bugs like this, yet it's not being
> used.  Don't suppose this is something someone would feel motivated to
> add this to some LLVM testing code? :)
> Thanks for your time,
> ~Will

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