[llvm] [InstCombine] Generalize `(A + 1) + ~B` fold to any constant (PR #188271)

[Ramkumar Ramachandra via llvm-commits]

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

LGTM, with suggestion for improving clarity, thanks! Kindly wait 24h before landing, to give Yingwei a chance to take a look.

https://github.com/llvm/llvm-project/pull/188271