[llvm] [LoopInterchange] Remove 'I' dependency (PR #140709)

[Sjoerd Meijer via llvm-commits]

sjoerdmeijer wrote:

Hi, thanks for the patch and fixing this. I had a first quick look and also talked this through with @sebpop. This looks like a very sensible change, but I want to look a bit better and let this sink, and need a bit more time. I will reply again early next week.

https://github.com/llvm/llvm-project/pull/140709