[llvm] [InstCombine] handle (X + A) % Op1 for small X, A (PR #140369)

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DesWurstes wrote:

Okay, I had implemented it there because just above where I added my code, there's optimization for `// For "(X + 1) % Op1" and if (X u< Op1) => (X + 1) == Op1 ? 0 : X + 1 .`. I'll try to improve the code in the pull request you've linked

https://github.com/llvm/llvm-project/pull/140369