[llvm] [LoopInterchange] Constrain LI within supported loop nest depth (PR #118656)

[via llvm-commits]

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+; REQUIRES: asserts
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CongzheUalberta wrote:

I don't see why you need to duplicate the file? I think you only need to check optimization remarks instead of debug output as what you are doing now, e.g., `llvm/test/Transforms/LoopInterchange/loop-interchange-optimization-remarks.ll`.

https://github.com/llvm/llvm-project/pull/118656