[llvm] [VPlan] Remove ExtractLastLane for plans with scalar VFs. (PR #171145)

[via llvm-commits]

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@@ -371,10 +371,9 @@ void UnrollState::unrollBlock(VPBlockBase *VPB) {
       continue;
     }
 
-    if (match(&R, m_ExtractLastLaneOfLastPart(m_VPValue(Op0))) ||
-        match(&R, m_ExtractPenultimateElement(m_VPValue(Op0)))) {
-      addUniformForAllParts(cast<VPSingleDefRecipe>(&R));
-      if (Plan.hasScalarVFOnly()) {
+    if (Plan.hasScalarVFOnly()) {
+      if (match(&R, m_ExtractLastPart(m_VPValue(Op0))) ||
+          match(&R, m_ExtractPenultimateElement(m_VPValue(Op0)))) {
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ayalz wrote:

Would be simpler handle each match separately?

https://github.com/llvm/llvm-project/pull/171145