[llvm] [VPlan] Introduce ResumePhi VPInstruction, use to create phi for FOR. (PR #94760)

[via llvm-commits]

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@@ -696,7 +734,7 @@ void VPInstruction::execute(VPTransformState &State) {
     assert(GeneratedValue && "generatePerPart must produce a value");
     assert((GeneratedValue->getType()->isVectorTy() ==
                 !GeneratesPerFirstLaneOnly ||
-            State.VF.isScalar()) &&
+            State.VF.isSingleScalar()) &&
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ayalz wrote:

Checking if VF is 1 should stay isScalar()?

https://github.com/llvm/llvm-project/pull/94760