[llvm-branch-commits] [llvm] release/18.x: [InstCombine] Drop nuw flag when CtlzOp is a sub nuw (#91776) (PR #91917)

[Nikita Popov via llvm-branch-commits]

https://github.com/nikic requested changes to this pull request.

Looks like the test is failing on the release branch.

https://github.com/llvm/llvm-project/pull/91917