[VPlan] Clarify naming for helpers to create loop&replicate regions (NFC)

fhahn · Lukacma · commit 667aad7ce37e · 2025-10-29T11:14:58.000Z
Split off to clarify naming, as suggested in llvm#156262.
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.cpp b/llvm/lib/Transforms/Vectorize/VPlan.cpp
@@ -742,8 +742,12 @@ static std::pair<VPBlockBase *, VPBlockBase *> cloneFrom(VPBlockBase *Entry) {
 
 VPRegionBlock *VPRegionBlock::clone() {
   const auto &[NewEntry, NewExiting] = cloneFrom(getEntry());
-  auto *NewRegion = getPlan()->createVPRegionBlock(NewEntry, NewExiting,
-                                                   getName(), isReplicator());
+  VPlan &Plan = *getPlan();
+  VPRegionBlock *NewRegion =
+      isReplicator()
+          ? Plan.createReplicateRegion(NewEntry, NewExiting, getName())
+          : Plan.createLoopRegion(getName(), NewEntry, NewExiting);
+
   for (VPBlockBase *Block : vp_depth_first_shallow(NewEntry))
     Block->setParent(NewRegion);
   return NewRegion;
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -4450,22 +4450,24 @@ class VPlan {
     return VPB;
   }
 
-  /// Create a new VPRegionBlock with \p Entry, \p Exiting and \p Name. If \p
-  /// IsReplicator is true, the region is a replicate region. The returned block
-  /// is owned by the VPlan and deleted once the VPlan is destroyed.
-  VPRegionBlock *createVPRegionBlock(VPBlockBase *Entry, VPBlockBase *Exiting,
-                                     const std::string &Name = "",
-                                     bool IsReplicator = false) {
-    auto *VPB = new VPRegionBlock(Entry, Exiting, Name, IsReplicator);
+  /// Create a new loop region with \p Name and entry and exiting blocks set
+  /// to \p Entry and \p Exiting respectively, if set. The returned block is
+  /// owned by the VPlan and deleted once the VPlan is destroyed.
+  VPRegionBlock *createLoopRegion(const std::string &Name = "",
+                                  VPBlockBase *Entry = nullptr,
+                                  VPBlockBase *Exiting = nullptr) {
+    auto *VPB = Entry ? new VPRegionBlock(Entry, Exiting, Name)
+                      : new VPRegionBlock(Name);
     CreatedBlocks.push_back(VPB);
     return VPB;
   }
 
-  /// Create a new loop VPRegionBlock with \p Name and entry and exiting blocks set
-  /// to nullptr. The returned block is owned by the VPlan and deleted once the
-  /// VPlan is destroyed.
-  VPRegionBlock *createVPRegionBlock(const std::string &Name = "") {
-    auto *VPB = new VPRegionBlock(Name);
+  /// Create a new replicate region with \p Entry, \p Exiting and \p Name. The
+  /// returned block is owned by the VPlan and deleted once the VPlan is
+  /// destroyed.
+  VPRegionBlock *createReplicateRegion(VPBlockBase *Entry, VPBlockBase *Exiting,
+                                       const std::string &Name = "") {
+    auto *VPB = new VPRegionBlock(Entry, Exiting, Name, true);
     CreatedBlocks.push_back(VPB);
     return VPB;
   }
diff --git a/llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp b/llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp
@@ -406,7 +406,7 @@ static void createLoopRegion(VPlan &Plan, VPBlockBase *HeaderVPB) {
   // LatchExitVPB, taking care to preserve the original predecessor & successor
   // order of blocks. Set region entry and exiting after both HeaderVPB and
   // LatchVPBB have been disconnected from their predecessors/successors.
-  auto *R = Plan.createVPRegionBlock();
+  auto *R = Plan.createLoopRegion();
   VPBlockUtils::insertOnEdge(LatchVPBB, LatchExitVPB, R);
   VPBlockUtils::disconnectBlocks(LatchVPBB, R);
   VPBlockUtils::connectBlocks(PreheaderVPBB, R);
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -372,7 +372,7 @@ static VPRegionBlock *createReplicateRegion(VPReplicateRecipe *PredRecipe,
   auto *Exiting =
       Plan.createVPBasicBlock(Twine(RegionName) + ".continue", PHIRecipe);
   VPRegionBlock *Region =
-      Plan.createVPRegionBlock(Entry, Exiting, RegionName, true);
+      Plan.createReplicateRegion(Entry, Exiting, RegionName);
 
   // Note: first set Entry as region entry and then connect successors starting
   // from it in order, to propagate the "parent" of each VPBasicBlock.
diff --git a/llvm/unittests/Transforms/Vectorize/VPDomTreeTest.cpp b/llvm/unittests/Transforms/Vectorize/VPDomTreeTest.cpp
@@ -33,7 +33,7 @@ TEST_F(VPDominatorTreeTest, DominanceNoRegionsTest) {
   VPBasicBlock *VPBB2 = Plan.createVPBasicBlock("VPBB2");
   VPBasicBlock *VPBB3 = Plan.createVPBasicBlock("VPBB3");
   VPBasicBlock *VPBB4 = Plan.createVPBasicBlock("VPBB4");
-  VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB1, VPBB4);
+  VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB1, VPBB4);
   VPBB2->setParent(R1);
   VPBB3->setParent(R1);
 
@@ -99,7 +99,7 @@ TEST_F(VPDominatorTreeTest, DominanceRegionsTest) {
     VPBasicBlock *R1BB2 = Plan.createVPBasicBlock("");
     VPBasicBlock *R1BB3 = Plan.createVPBasicBlock("");
     VPBasicBlock *R1BB4 = Plan.createVPBasicBlock("");
-    VPRegionBlock *R1 = Plan.createVPRegionBlock(R1BB1, R1BB4, "R1");
+    VPRegionBlock *R1 = Plan.createLoopRegion("R1", R1BB1, R1BB4);
     R1BB2->setParent(R1);
     R1BB3->setParent(R1);
     VPBlockUtils::connectBlocks(VPBB0, R1);
@@ -112,7 +112,7 @@ TEST_F(VPDominatorTreeTest, DominanceRegionsTest) {
 
     VPBasicBlock *R2BB1 = Plan.createVPBasicBlock("");
     VPBasicBlock *R2BB2 = Plan.createVPBasicBlock("");
-    VPRegionBlock *R2 = Plan.createVPRegionBlock(R2BB1, R2BB2, "R2");
+    VPRegionBlock *R2 = Plan.createLoopRegion("R2", R2BB1, R2BB2);
     VPBlockUtils::connectBlocks(R2BB1, R2BB2);
     VPBlockUtils::connectBlocks(R1, R2);
 
@@ -171,12 +171,12 @@ TEST_F(VPDominatorTreeTest, DominanceRegionsTest) {
     VPBasicBlock *R1BB1 = Plan.createVPBasicBlock("R1BB1");
     VPBasicBlock *R1BB2 = Plan.createVPBasicBlock("R1BB2");
     VPBasicBlock *R1BB3 = Plan.createVPBasicBlock("R1BB3");
-    VPRegionBlock *R1 = Plan.createVPRegionBlock(R1BB1, R1BB3, "R1");
+    VPRegionBlock *R1 = Plan.createLoopRegion("R1", R1BB1, R1BB3);
 
     VPBasicBlock *R2BB1 = Plan.createVPBasicBlock("R2BB1");
     VPBasicBlock *R2BB2 = Plan.createVPBasicBlock("R2BB2");
     VPBasicBlock *R2BB3 = Plan.createVPBasicBlock("R2BB#");
-    VPRegionBlock *R2 = Plan.createVPRegionBlock(R2BB1, R2BB3, "R2");
+    VPRegionBlock *R2 = Plan.createLoopRegion("R2", R2BB1, R2BB3);
     R2BB2->setParent(R2);
     VPBlockUtils::connectBlocks(R2BB1, R2BB2);
     VPBlockUtils::connectBlocks(R2BB2, R2BB1);
diff --git a/llvm/unittests/Transforms/Vectorize/VPlanTest.cpp b/llvm/unittests/Transforms/Vectorize/VPlanTest.cpp
@@ -269,7 +269,7 @@ TEST_F(VPBasicBlockTest, getPlan) {
     // VPBasicBlock is the entry into the VPlan, followed by a region.
     VPBasicBlock *R1BB1 = Plan.createVPBasicBlock("");
     VPBasicBlock *R1BB2 = Plan.createVPBasicBlock("");
-    VPRegionBlock *R1 = Plan.createVPRegionBlock(R1BB1, R1BB2, "R1");
+    VPRegionBlock *R1 = Plan.createLoopRegion("R1", R1BB1, R1BB2);
     VPBlockUtils::connectBlocks(R1BB1, R1BB2);
 
     VPBlockUtils::connectBlocks(VPBB1, R1);
@@ -286,12 +286,12 @@ TEST_F(VPBasicBlockTest, getPlan) {
     VPlan &Plan = getPlan();
     VPBasicBlock *R1BB1 = Plan.createVPBasicBlock("");
     VPBasicBlock *R1BB2 = Plan.createVPBasicBlock("");
-    VPRegionBlock *R1 = Plan.createVPRegionBlock(R1BB1, R1BB2, "R1");
+    VPRegionBlock *R1 = Plan.createLoopRegion("R1", R1BB1, R1BB2);
     VPBlockUtils::connectBlocks(R1BB1, R1BB2);
 
     VPBasicBlock *R2BB1 = Plan.createVPBasicBlock("");
     VPBasicBlock *R2BB2 = Plan.createVPBasicBlock("");
-    VPRegionBlock *R2 = Plan.createVPRegionBlock(R2BB1, R2BB2, "R2");
+    VPRegionBlock *R2 = Plan.createLoopRegion("R2", R2BB1, R2BB2);
     VPBlockUtils::connectBlocks(R2BB1, R2BB2);
 
     VPBasicBlock *VPBB1 = Plan.getEntry();
@@ -369,7 +369,7 @@ TEST_F(VPBasicBlockTest, TraversingIteratorTest) {
     VPBasicBlock *R1BB2 = Plan.createVPBasicBlock("");
     VPBasicBlock *R1BB3 = Plan.createVPBasicBlock("");
     VPBasicBlock *R1BB4 = Plan.createVPBasicBlock("");
-    VPRegionBlock *R1 = Plan.createVPRegionBlock(R1BB1, R1BB4, "R1");
+    VPRegionBlock *R1 = Plan.createLoopRegion("R1", R1BB1, R1BB4);
     R1BB2->setParent(R1);
     R1BB3->setParent(R1);
     VPBlockUtils::connectBlocks(VPBB0, R1);
@@ -382,7 +382,7 @@ TEST_F(VPBasicBlockTest, TraversingIteratorTest) {
 
     VPBasicBlock *R2BB1 = Plan.createVPBasicBlock("");
     VPBasicBlock *R2BB2 = Plan.createVPBasicBlock("");
-    VPRegionBlock *R2 = Plan.createVPRegionBlock(R2BB1, R2BB2, "R2");
+    VPRegionBlock *R2 = Plan.createLoopRegion("R2", R2BB1, R2BB2);
     VPBlockUtils::connectBlocks(R2BB1, R2BB2);
     VPBlockUtils::connectBlocks(R1, R2);
 
@@ -467,12 +467,12 @@ TEST_F(VPBasicBlockTest, TraversingIteratorTest) {
     VPBasicBlock *R1BB1 = Plan.createVPBasicBlock("R1BB1");
     VPBasicBlock *R1BB2 = Plan.createVPBasicBlock("R1BB2");
     VPBasicBlock *R1BB3 = Plan.createVPBasicBlock("R1BB3");
-    VPRegionBlock *R1 = Plan.createVPRegionBlock(R1BB1, R1BB3, "R1");
+    VPRegionBlock *R1 = Plan.createLoopRegion("R1", R1BB1, R1BB3);
 
     VPBasicBlock *R2BB1 = Plan.createVPBasicBlock("R2BB1");
     VPBasicBlock *R2BB2 = Plan.createVPBasicBlock("R2BB2");
     VPBasicBlock *R2BB3 = Plan.createVPBasicBlock("R2BB3");
-    VPRegionBlock *R2 = Plan.createVPRegionBlock(R2BB1, R2BB3, "R2");
+    VPRegionBlock *R2 = Plan.createLoopRegion("R2", R2BB1, R2BB3);
     R2BB2->setParent(R2);
     VPBlockUtils::connectBlocks(R2BB1, R2BB2);
     VPBlockUtils::connectBlocks(R2BB2, R2BB1);
@@ -537,10 +537,10 @@ TEST_F(VPBasicBlockTest, TraversingIteratorTest) {
     VPlan &Plan = getPlan();
     VPBasicBlock *R2BB1 = Plan.createVPBasicBlock("R2BB1");
     VPBasicBlock *R2BB2 = Plan.createVPBasicBlock("R2BB2");
-    VPRegionBlock *R2 = Plan.createVPRegionBlock(R2BB1, R2BB2, "R2");
+    VPRegionBlock *R2 = Plan.createLoopRegion("R2", R2BB1, R2BB2);
     VPBlockUtils::connectBlocks(R2BB1, R2BB2);
 
-    VPRegionBlock *R1 = Plan.createVPRegionBlock(R2, R2, "R1");
+    VPRegionBlock *R1 = Plan.createLoopRegion("R1", R2, R2);
     R2->setParent(R1);
 
     VPBasicBlock *VPBB1 = Plan.getEntry();
@@ -590,14 +590,14 @@ TEST_F(VPBasicBlockTest, TraversingIteratorTest) {
     //
     VPlan &Plan = getPlan();
     VPBasicBlock *R3BB1 = Plan.createVPBasicBlock("R3BB1");
-    VPRegionBlock *R3 = Plan.createVPRegionBlock(R3BB1, R3BB1, "R3");
+    VPRegionBlock *R3 = Plan.createLoopRegion("R3", R3BB1, R3BB1);
 
     VPBasicBlock *R2BB1 = Plan.createVPBasicBlock("R2BB1");
-    VPRegionBlock *R2 = Plan.createVPRegionBlock(R2BB1, R3, "R2");
+    VPRegionBlock *R2 = Plan.createLoopRegion("R2", R2BB1, R3);
     R3->setParent(R2);
     VPBlockUtils::connectBlocks(R2BB1, R3);
 
-    VPRegionBlock *R1 = Plan.createVPRegionBlock(R2, R2, "R1");
+    VPRegionBlock *R1 = Plan.createLoopRegion("R1", R2, R2);
     R2->setParent(R1);
 
     VPBasicBlock *VPBB1 = Plan.getEntry();
@@ -687,7 +687,7 @@ TEST_F(VPBasicBlockTest, reassociateBlocks) {
     VPlan &Plan = getPlan();
     VPBasicBlock *VPBB1 = Plan.createVPBasicBlock("VPBB1");
     VPBasicBlock *VPBB2 = Plan.createVPBasicBlock("VPBB2");
-    VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB2, VPBB2, "R1");
+    VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB2, VPBB2);
     VPBlockUtils::connectBlocks(VPBB1, R1);
 
     auto *WidenPhi = new VPWidenPHIRecipe(nullptr);
diff --git a/llvm/unittests/Transforms/Vectorize/VPlanVerifierTest.cpp b/llvm/unittests/Transforms/Vectorize/VPlanVerifierTest.cpp
@@ -32,7 +32,7 @@ TEST_F(VPVerifierTest, VPInstructionUseBeforeDefSameBB) {
 
   VPBasicBlock *VPBB2 = Plan.createVPBasicBlock("");
   VPBB2->appendRecipe(CanIV);
-  VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB2, VPBB2, "R1");
+  VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB2, VPBB2);
   VPBlockUtils::connectBlocks(VPBB1, R1);
   VPBlockUtils::connectBlocks(R1, Plan.getScalarHeader());
 
@@ -71,7 +71,7 @@ TEST_F(VPVerifierTest, VPInstructionUseBeforeDefDifferentBB) {
   VPBB2->appendRecipe(DefI);
   VPBB2->appendRecipe(BranchOnCond);
 
-  VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB2, VPBB2, "R1");
+  VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB2, VPBB2);
   VPBlockUtils::connectBlocks(VPBB1, R1);
   VPBlockUtils::connectBlocks(R1, Plan.getScalarHeader());
 
@@ -117,7 +117,7 @@ TEST_F(VPVerifierTest, VPBlendUseBeforeDefDifferentBB) {
 
   VPBlockUtils::connectBlocks(VPBB2, VPBB3);
   VPBlockUtils::connectBlocks(VPBB3, VPBB4);
-  VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB2, VPBB4, "R1");
+  VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB2, VPBB4);
   VPBlockUtils::connectBlocks(VPBB1, R1);
   VPBB3->setParent(R1);
 
@@ -160,7 +160,7 @@ TEST_F(VPVerifierTest, VPPhiIncomingValueDoesntDominateIncomingBlock) {
   auto *CanIV = new VPCanonicalIVPHIRecipe(Zero, {});
   VPBB3->appendRecipe(CanIV);
 
-  VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB3, VPBB3, "R1");
+  VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB3, VPBB3);
   VPBlockUtils::connectBlocks(VPBB1, VPBB2);
   VPBlockUtils::connectBlocks(VPBB2, R1);
   VPBlockUtils::connectBlocks(VPBB4, Plan.getScalarHeader());
@@ -200,7 +200,7 @@ TEST_F(VPVerifierTest, DuplicateSuccessorsOutsideRegion) {
   VPBB2->appendRecipe(CanIV);
   VPBB2->appendRecipe(BranchOnCond);
 
-  VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB2, VPBB2, "R1");
+  VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB2, VPBB2);
   VPBlockUtils::connectBlocks(VPBB1, R1);
   VPBlockUtils::connectBlocks(VPBB1, R1);
 
@@ -237,7 +237,7 @@ TEST_F(VPVerifierTest, DuplicateSuccessorsInsideRegion) {
 
   VPBlockUtils::connectBlocks(VPBB2, VPBB3);
   VPBlockUtils::connectBlocks(VPBB2, VPBB3);
-  VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB2, VPBB3, "R1");
+  VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB2, VPBB3);
   VPBlockUtils::connectBlocks(VPBB1, R1);
   VPBB3->setParent(R1);
 
@@ -270,7 +270,7 @@ TEST_F(VPVerifierTest, BlockOutsideRegionWithParent) {
   VPBB1->appendRecipe(DefI);
   VPBB2->appendRecipe(BranchOnCond);
 
-  VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB2, VPBB2, "R1");
+  VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB2, VPBB2);
   VPBlockUtils::connectBlocks(VPBB1, R1);
 
   VPBlockUtils::connectBlocks(R1, Plan.getScalarHeader());
@@ -302,7 +302,7 @@ TEST_F(VPVerifierTest, NonHeaderPHIInHeader) {
   VPBB2->appendRecipe(IRPhi);
   VPBB2->appendRecipe(BranchOnCond);
 
-  VPRegionBlock *R1 = Plan.createVPRegionBlock(VPBB2, VPBB2, "R1");
+  VPRegionBlock *R1 = Plan.createLoopRegion("R1", VPBB2, VPBB2);
   VPBlockUtils::connectBlocks(VPBB1, R1);
   VPBlockUtils::connectBlocks(R1, Plan.getScalarHeader());
 
