Arnold Schwaighofer edd62b14e5 Optimistically analyse Phi cycles ...

Analyse Phis under the starting assumption that they are NoAlias. Recursively
look at their inputs.
If they MayAlias/MustAlias there must be an input that makes them so.

Addresses bug 14351.

llvm-svn: 169788

2012-12-10 23:02:41 +00:00

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