[llvm] [InstSimplify] Fold icmp ult/ule (A nuw+ CA), (B nuw+ CB) to true when A <=u B and CA <=u CB (PR #201485)

[Aayush Shrivastava via llvm-commits]

iamaayushrivastava wrote:

> Make sure you add any new tests as the first commit in the PR's commit chain with current (trunk) codegen, and then regenerate the checks in eh followup commit with the new fold.

I've split this into two commits. The first adds the test file, and the second adds the fold and regenerates the checks. Thanks for the review!

https://github.com/llvm/llvm-project/pull/201485