[llvm] [VPlan] Implement interleaving as VPlan-to-VPlan transform. (PR #95842)

[Florian Hahn via llvm-commits]

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@@ -701,6 +701,8 @@ class VPLiveOut : public VPUser {
 
   PHINode *getPhi() const { return Phi; }
 
+  bool onlyFirstPartUsed(const VPValue *Op) const override { return true; }
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fhahn wrote:

Yep, mostly for the transition.

https://github.com/llvm/llvm-project/pull/95842