[llvm] [InstCombine] Simplify `add nsw/nuw i1` to `or disjoint i1` (PR #118221)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw commented:

Please add some tests to demonstrate that this change will improve the final codegen/analysis results.


https://github.com/llvm/llvm-project/pull/118221