[llvm] [InstCombine] Canonicalize Bit Testing by Shifting to Bit 0 (PR #101838)

[Nikita Popov via llvm-commits]

https://github.com/nikic approved this pull request.

LGTM, but it looks like there is a regression in this case: https://llvm.godbolt.org/z/8dGhf9Wz1

https://github.com/llvm/llvm-project/pull/101838