[llvm] [InstCombine] Preserve the nsw flag for (X | Op01C) + Op1C --> X + (Op01C + Op1C) (PR #94586)

[Nikita Popov via llvm-commits]

nikic wrote:

This would be a correct variant of the transform: https://alive2.llvm.org/ce/z/nrdCZT

https://github.com/llvm/llvm-project/pull/94586