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

[via llvm-commits]

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@@ -1558,7 +1556,8 @@ void VPIRInstruction::extractLastLaneOfFirstOperand(VPBuilder &Builder) {
   if (Exiting->isLiveIn())
     return;
 
-  Exiting = Builder.createNaryOp(VPInstruction::ExtractLastElement, {Exiting});
+  Exiting = Builder.createNaryOp(VPInstruction::ExtractLastPart, Exiting);
+  Exiting = Builder.createNaryOp(VPInstruction::ExtractLastLane, Exiting);
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ayalz wrote:

Suggests renaming the method to `extractFinalLaneOfFirstOperand()`

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