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

[via llvm-commits]

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@@ -755,8 +761,22 @@ static void processLaneForReplicateRegion(VPlan &Plan, Type *IdxTy,
 
       if (auto *Steps = dyn_cast<VPScalarIVStepsRecipe>(&NewR))
         addLaneToStartIndex(Steps, Lane, Plan, Steps);
-      else if (match(&NewR, m_ExtractElement(m_VPValue(), m_ZeroInt())))
+      else if (match(&NewR, m_ExtractElement(m_VPValue(), m_VPValue()))) {
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ayalz wrote:

```suggestion
      } else if (match(&NewR, m_ExtractElement(m_VPValue(), m_VPValue()))) {
```

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