[llvm] [LoopInterchange] Support inner-loop simple reductions via UndoSimpleReduction (PR #172970)

[Yingying Wang via llvm-commits]

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buggfg wrote:

> If that's the case, probably it would be better to check if we can move the definition of memory reference into the loop header, rather than only checking dominance.

Yes, that’s a better approach and my next step. Do you think I should implement it in this PR?



https://github.com/llvm/llvm-project/pull/172970