147   BasicBlock *Preheader = L.getLoopPreheader();  in parseLoopStructure()  local
148   if (!Preheader) {  in parseLoopStructure()
400   const DataLayout &DL = Preheader->getDataLayout();  in parseLoopStructure()
402   Instruction *Ins = Preheader->getTerminator();  in parseLoopStructure()
520     const LoopStructure &LS, BasicBlock *Preheader, Value *ExitSubloopAt,  in changeIterationSpaceEnd()  argument
601   BranchInst *PreheaderJump = cast<BranchInst>(Preheader->getTerminator());  in changeIterationSpaceEnd()
655     NewPHI->addIncoming(PN.getIncomingValueForBlock(Preheader), Preheader);  in changeIterationSpaceEnd()
663   RRI.IndVarEnd->addIncoming(IndVarStart, Preheader);  in changeIterationSpaceEnd()
687   BasicBlock *Preheader = BasicBlock::Create(Ctx, Tag, &F, LS.Header);  in createPreheader()  local
688   BranchInst::Create(LS.Header, Preheader);  in createPreheader()
690   LS.Header->replacePhiUsesWith(OldPreheader, Preheader);  in createPreheader()
692   return Preheader;  in createPreheader()
727   BasicBlock *Preheader = OriginalLoop.getLoopPreheader();  in run()  local
728   assert(Preheader != nullptr && "precondition!");  in run()
730   OriginalPreheader = Preheader;  in run()
731   MainLoopPreheader = Preheader;  in run()
817     Preheader->getTerminator()->replaceUsesOfWith(MainLoopStructure.Header,  in run()
821         createPreheader(MainLoopStructure, Preheader, "mainloop");  in run()
822     PreLoopRRI = changeIterationSpaceEnd(PreLoop.Structure, Preheader,  in run()
833         createPreheader(PostLoop.Structure, Preheader, "postloop");  in run()
841       MainLoopPreheader != Preheader ? MainLoopPreheader : nullptr;  in run()