[llvm] [VectorCombine] Fold Deinterleave/Interleave Pairs (PR #211022)

[Benjamin Maxwell via llvm-commits]

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MacDue wrote:

I don't follow how `InstVisitor` could work here? Could you explain that you expect, I think this combine needs control of the visiting order, etc. 

https://github.com/llvm/llvm-project/pull/211022