[llvm] [VPlan] Introduce ExitPhi VPInstruction, use to create phi for FOR. (PR #94760)

[Florian Hahn via llvm-commits]

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@@ -1195,9 +1200,18 @@ VPlan *VPlan::duplicate() {
   remapOperands(Preheader, NewPreheader, Old2NewVPValues);
   remapOperands(Entry, NewEntry, Old2NewVPValues);
 
+  DenseMap<VPBlockBase *, VPBlockBase *> Old2NewVPBlocks;
+  VPBlockBase *OldMiddle = getVectorLoopRegion()->getSingleSuccessor();
+  VPBlockBase *NewMiddle = NewPlan->getVectorLoopRegion()->getSingleSuccessor();
+  Old2NewVPBlocks[OldMiddle] = NewMiddle;
+  for (const auto &[Old, New] :
+       zip(OldMiddle->getSuccessors(), NewMiddle->getSuccessors()))
+    Old2NewVPBlocks[Old] = New;
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fhahn wrote:

Not needed in the latest version

https://github.com/llvm/llvm-project/pull/94760