[llvm] Peek through freeze to see XOR (PR #147821)

[Craig Topper via llvm-commits]

topperc wrote:

> DAG now aggressively pushes freeze up through logic ops, why is this patch necessary?

In this case the input the XOR is a freeze. We don't know what the input the freeze is. Could the input to the freeze be an operation we don't push up across?

https://github.com/llvm/llvm-project/pull/147821