[PATCH] D23846: [MemCpy] Check for alias in performMemCpyToMemSetOptzn, instead of the identity of two operands

[Tim Shen via llvm-commits]

timshen added a comment.

In https://reviews.llvm.org/D23846#525459, @iteratee wrote:

> MustAlias is true only for exact aliases correct?


Yes, the comment in AliasAnalysis.h says so:

  /// The two locations precisely alias each other.
  MustAlias,


https://reviews.llvm.org/D23846