[PATCH] D10368: Analyze recursive PHI nodes in BasicAA

[hfinkel at anl.gov]

hfinkel added a comment.

In http://reviews.llvm.org/D10368#202772, @tobiasvk wrote:

> Change patch to use a load of undef, instead of just an undef, as the index for
>  the temporary GEP. This should make it safe even if aliasGEP ever gets smarter
>  about undefs.


Should we add some kind of '@llvm.unknown_value' intrinsic for this purpose?


http://reviews.llvm.org/D10368