!fixup use insertOnEdge.

Author: fhahn

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

@@ -2449,9 +2449,8 @@ static void introduceCheckBlockInVPlan(VPlan &Plan, BasicBlock *CheckIRBB) {
   VPBlockBase *VectorPH = Plan.getVectorPreheader();
   VPBlockBase *PreVectorPH = VectorPH->getSinglePredecessor();
   VPIRBasicBlock *CheckVPIRBB = VPIRBasicBlock::fromBasicBlock(CheckIRBB);
-  VPBlockUtils::connectBlocks(PreVectorPH, CheckVPIRBB, -1, 1);
   VPBlockUtils::connectBlocks(CheckVPIRBB, ScalarPH);
-  VPBlockUtils::connectBlocks(CheckVPIRBB, VectorPH, 0, -1);
+  VPBlockUtils::insertOnEdge(PreVectorPH, VectorPH, CheckVPIRBB);
 }
 
 void InnerLoopVectorizer::emitIterationCountCheck(BasicBlock *Bypass) {

llvm/unittests/Transforms/Vectorize/VPlanTest.cpp

@@ -743,7 +743,7 @@ TEST(VPBasicBlockTest, print) {
   auto * ScalarHeaderVPBB = new VPIRBasicBlock(ScalarHeader);
   VPBlockUtils::connectBlocks(VPBB0, VPBB1);
   VPBlockUtils::connectBlocks(VPBB2, ScalarHeaderVPBB);
-  VPlan Plan(VPBB0, TC, VPBB1, ScalarHeaderVPBB);
+  VPlan Plan(VPBB0, TC, ScalarHeaderVPBB);
   std::string FullDump;
   raw_string_ostream OS(FullDump);
   Plan.printDOT(OS);