[llvm] [VPlan] Replace ExtractLast(Elem|LanePerPart) with ExtractLast(Lane/Part) (PR #164124)

[via llvm-commits]

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@@ -8821,7 +8821,7 @@ void LoopVectorizationPlanner::adjustRecipesForReductions(
       if (FinalReductionResult == U || Parent->getParent())
         continue;
       U->replaceUsesOfWith(OrigExitingVPV, FinalReductionResult);
-      if (match(U, m_ExtractLastElement(m_VPValue())))
+      if (match(U, m_ExtractFinalLane(m_VPValue())))
         cast<VPInstruction>(U)->replaceAllUsesWith(FinalReductionResult);
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ayalz wrote:

Would be good to clarify somewhere our distinction between "Last" and "Final".

("Final" also appears here in `FinalReductionResult`)

https://github.com/llvm/llvm-project/pull/164124