[llvm] [ConstantFolding] Support ptrtoaddr in ConstantFoldCompareInstOperands (PR #162653)

[Nikita Popov via llvm-commits]

nikic wrote:

Now that https://github.com/llvm/llvm-project/pull/163936 has landed, I've updated this to match the new semantics.

https://github.com/llvm/llvm-project/pull/162653