[BasicAA] Avoid calling GetUnderlyingObject, when the result of a previous call can be reused.
Recursive calls to aliasCheck from alias[GEP|Select|PHI] may result in a second call to GetUnderlyingObject for a Value, whose underlying object is already computed. This patch ensures that in this situations, the underlying object is not computed again, and the result of the previous call is resued.
https://reviews.llvm.org/D22305
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278519 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed