[llvm] [VPlan] Dissolve replicate regions with vector live-outs. (PR #189022)

[via llvm-commits]

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@@ -571,6 +572,12 @@ Value *VPInstruction::generate(VPTransformState &State) {
     Value *Idx = State.get(getOperand(1), /*IsScalar=*/true);
     return Builder.CreateExtractElement(Vec, Idx, Name);
   }
+  case Instruction::InsertElement: {
+    Value *Vec = State.get(getOperand(0));
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ayalz wrote:

```suggestion
    assert(State.VF.isVector() && "Only insert elements into vectors");
    Value *Vec = State.get(getOperand(0));
```

https://github.com/llvm/llvm-project/pull/189022