[llvm] [LoopInterchange] Handle LE and GE correctly (PR #124901)

[Sjoerd Meijer via llvm-commits]

https://github.com/sjoerdmeijer approved this pull request.

I agree with this direction, correctness should be the first priority. 
Also, as you mentioned, this does not regress many cases. 

LGTM

https://github.com/llvm/llvm-project/pull/124901