[llvm] [InstComb] Fold shr ([x]or x, y), x -> shr y, x (PR #165866)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

Looks like this pattern doesn't appear in the wild? Zero diff on llvm-opt-benchmark? Can someone confirm that there wasn't some error so we can close this?

https://github.com/llvm/llvm-project/pull/165866