diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index e8653498d32a12..9647267c217172 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -7692,8 +7692,7 @@ DenseMap<const SCEV *, Value *> LoopVectorizationPlanner::executePlan(
   BestVPlan.execute(&State);
 
   // 2.5 Collect reduction resume values.
-  auto *ExitVPBB =
-      cast<VPBasicBlock>(BestVPlan.getVectorLoopRegion()->getSingleSuccessor());
+  auto *ExitVPBB = BestVPlan.getMiddleBlock();
   for (VPRecipeBase &R : *ExitVPBB) {
     createAndCollectMergePhiForReduction(
         dyn_cast<VPInstruction>(&R), State, OrigLoop,
@@ -8778,8 +8777,7 @@ static void addCanonicalIVRecipes(VPlan &Plan, Type *IdxTy, bool HasNUW,
 static SetVector<VPIRInstruction *> collectUsersInExitBlock(
     Loop *OrigLoop, VPRecipeBuilder &Builder, VPlan &Plan,
     const MapVector<PHINode *, InductionDescriptor> &Inductions) {
-  auto *MiddleVPBB =
-      cast<VPBasicBlock>(Plan.getVectorLoopRegion()->getSingleSuccessor());
+  auto *MiddleVPBB = Plan.getMiddleBlock();
   // No edge from the middle block to the unique exit block has been inserted
   // and there is nothing to fix from vector loop; phis should have incoming
   // from scalar loop only.
@@ -8825,8 +8823,7 @@ addUsersInExitBlock(VPlan &Plan,
   if (ExitUsersToFix.empty())
     return;
 
-  auto *MiddleVPBB =
-      cast<VPBasicBlock>(Plan.getVectorLoopRegion()->getSingleSuccessor());
+  auto *MiddleVPBB = Plan.getMiddleBlock();
   VPBuilder B(MiddleVPBB, MiddleVPBB->getFirstNonPhi());
 
   // Introduce extract for exiting values and update the VPIRInstructions
@@ -8863,7 +8860,7 @@ static void addLiveOutsForFirstOrderRecurrences(
   // TODO: Should be replaced by
   // Plan->getScalarLoopRegion()->getSinglePredecessor() in the future once the
   // scalar region is modeled as well.
-  auto *MiddleVPBB = cast<VPBasicBlock>(VectorRegion->getSingleSuccessor());
+  auto *MiddleVPBB = Plan.getMiddleBlock();
   VPBasicBlock *ScalarPHVPBB = nullptr;
   if (MiddleVPBB->getNumSuccessors() == 2) {
     // Order is strict: first is the exit block, second is the scalar preheader.
@@ -9065,8 +9062,7 @@ LoopVectorizationPlanner::tryToBuildVPlanWithVPRecipes(VFRange &Range) {
         bool NeedsBlends = BB != HeaderBB && !BB->phis().empty();
         return Legal->blockNeedsPredication(BB) || NeedsBlends;
       });
-  auto *MiddleVPBB =
-      cast<VPBasicBlock>(Plan->getVectorLoopRegion()->getSingleSuccessor());
+  auto *MiddleVPBB = Plan->getMiddleBlock();
   VPBasicBlock::iterator MBIP = MiddleVPBB->getFirstNonPhi();
   for (BasicBlock *BB : make_range(DFS.beginRPO(), DFS.endRPO())) {
     // Relevant instructions from basic block BB will be grouped into VPRecipe
@@ -9277,8 +9273,7 @@ void LoopVectorizationPlanner::adjustRecipesForReductions(
   using namespace VPlanPatternMatch;
   VPRegionBlock *VectorLoopRegion = Plan->getVectorLoopRegion();
   VPBasicBlock *Header = VectorLoopRegion->getEntryBasicBlock();
-  VPBasicBlock *MiddleVPBB =
-      cast<VPBasicBlock>(VectorLoopRegion->getSingleSuccessor());
+  VPBasicBlock *MiddleVPBB = Plan->getMiddleBlock();
   for (VPRecipeBase &R : Header->phis()) {
     auto *PhiR = dyn_cast<VPReductionPHIRecipe>(&R);
     if (!PhiR || !PhiR->isInLoop() || (MinVF.isScalar() && !PhiR->isOrdered()))
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.cpp b/llvm/lib/Transforms/Vectorize/VPlan.cpp
index c1b97791331bcf..deeeca57357e26 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlan.cpp
@@ -1030,8 +1030,8 @@ void VPlan::execute(VPTransformState *State) {
   // skeleton creation, so we can only create the VPIRBasicBlocks now during
   // VPlan execution rather than earlier during VPlan construction.
   BasicBlock *MiddleBB = State->CFG.ExitBB;
-  VPBasicBlock *MiddleVPBB =
-      cast<VPBasicBlock>(getVectorLoopRegion()->getSingleSuccessor());
+  VPBasicBlock *MiddleVPBB = getMiddleBlock();
+
   // Find the VPBB for the scalar preheader, relying on the current structure
   // when creating the middle block and its successrs: if there's a single
   // predecessor, it must be the scalar preheader. Otherwise, the second
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index 59a084401cc9bf..8ea50767aa783f 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -3689,6 +3689,14 @@ class VPlan {
   VPBasicBlock *getEntry() { return Entry; }
   const VPBasicBlock *getEntry() const { return Entry; }
 
+  /// Methods to support access to the middle block.
+  const VPBasicBlock *getMiddleBlock() const {
+    return cast<VPBasicBlock>(getVectorLoopRegion()->getSingleSuccessor());
+  }
+  VPBasicBlock *getMiddleBlock() {
+    return cast<VPBasicBlock>(getVectorLoopRegion()->getSingleSuccessor());
+  }
+
   /// The trip count of the original loop.
   VPValue *getTripCount() const {
     assert(TripCount && "trip count needs to be set before accessing it");
diff --git a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
index 41f13cc2d9a978..19c1a910b49c66 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
@@ -212,8 +212,7 @@ bool VPRecipeBase::mayHaveSideEffects() const {
 
 void VPLiveOut::fixPhi(VPlan &Plan, VPTransformState &State) {
   VPValue *ExitValue = getOperand(0);
-  VPBasicBlock *MiddleVPBB =
-      cast<VPBasicBlock>(Plan.getVectorLoopRegion()->getSingleSuccessor());
+  VPBasicBlock *MiddleVPBB = Plan.getMiddleBlock();
   VPRecipeBase *ExitingRecipe = ExitValue->getDefiningRecipe();
   auto *ExitingVPBB = ExitingRecipe ? ExitingRecipe->getParent() : nullptr;
   // Values leaving the vector loop reach live out phi's in the exiting block
diff --git a/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp b/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
index 7ea5ee341cc547..1cccd8a5bab7fe 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
@@ -248,8 +248,7 @@ bool VPlanVerifier::verifyVPBasicBlock(const VPBasicBlock *VPBB) {
     return false;
   }
 
-  VPBlockBase *MiddleBB =
-      IRBB->getPlan()->getVectorLoopRegion()->getSingleSuccessor();
+  const VPBasicBlock *MiddleBB = IRBB->getPlan()->getMiddleBlock();
   if (IRBB != IRBB->getPlan()->getPreheader() &&
       IRBB->getSinglePredecessor() != MiddleBB) {
     errs() << "VPIRBasicBlock can only be used as pre-header or a successor of "