304     MachineInstr *MI, MachineBasicBlock *TailBB, MachineBasicBlock *PredBB,  in processPHI()  argument
320   if (isDefLiveOut(DefReg, TailBB, MRI) || RegsUsedByPhi.count(DefReg))  in processPHI()
336     MachineInstr *MI, MachineBasicBlock *TailBB, MachineBasicBlock *PredBB,  in duplicateInstruction()  argument
354         if (isDefLiveOut(Reg, TailBB, MRI) || UsedByPhi.count(Reg))  in duplicateInstruction()
508                                          MachineBasicBlock &TailBB) {  in shouldTailDuplicate()  argument
510   if (TailBB.canFallThrough())  in shouldTailDuplicate()
514   if (TailBB.isSuccessor(&TailBB))  in shouldTailDuplicate()
535   if (!TailBB.empty())  in shouldTailDuplicate()
536     HasIndirectbr = TailBB.back().isIndirectBranch();  in shouldTailDuplicate()
544   for (MachineInstr &MI : TailBB) {  in shouldTailDuplicate()
582   for (auto SB : TailBB.successors()) {  in shouldTailDuplicate()
586       unsigned Idx = getPHISrcRegOpIdx(&I, &TailBB);  in shouldTailDuplicate()
603   return canCompletelyDuplicateBB(TailBB);  in shouldTailDuplicate()
607 bool TailDuplicator::isSimpleBB(MachineBasicBlock *TailBB) {  in isSimpleBB()  argument
608   if (TailBB->succ_size() != 1)  in isSimpleBB()
610   if (TailBB->pred_empty())  in isSimpleBB()
612   MachineBasicBlock::iterator I = TailBB->getFirstNonDebugInstr();  in isSimpleBB()
613   if (I == TailBB->end())  in isSimpleBB()
644     MachineBasicBlock *TailBB, SmallVectorImpl<MachineBasicBlock *> &TDBBs,  in duplicateSimpleBB()  argument
647   SmallPtrSet<MachineBasicBlock *, 8> Succs(TailBB->succ_begin(),  in duplicateSimpleBB()
648                                             TailBB->succ_end());  in duplicateSimpleBB()
649   SmallVector<MachineBasicBlock *, 8> Preds(TailBB->pred_begin(),  in duplicateSimpleBB()
650                                             TailBB->pred_end());  in duplicateSimpleBB()
670                  << "From simple Succ: " << *TailBB);  in duplicateSimpleBB()
672     MachineBasicBlock *NewTarget = *TailBB->succ_begin();  in duplicateSimpleBB()
686     if (PredFBB == TailBB)  in duplicateSimpleBB()
688     if (PredTBB == TailBB)  in duplicateSimpleBB()
706       PredBB->replaceSuccessor(TailBB, NewTarget);  in duplicateSimpleBB()
708       PredBB->removeSuccessor(TailBB, true);  in duplicateSimpleBB()
723                                    MachineBasicBlock *TailBB,  in tailDuplicate()  argument
726   DEBUG(dbgs() << "\n*** Tail-duplicating BB#" << TailBB->getNumber() << '\n');  in tailDuplicate()
729   getRegsUsedByPHIs(*TailBB, &UsedByPhi);  in tailDuplicate()
732     return duplicateSimpleBB(TailBB, TDBBs, UsedByPhi, Copies);  in tailDuplicate()
738   SmallSetVector<MachineBasicBlock *, 8> Preds(TailBB->pred_begin(),  in tailDuplicate()
739                                                TailBB->pred_end());  in tailDuplicate()
745     assert(TailBB != PredBB &&  in tailDuplicate()
758     if (PredBB->isLayoutSuccessor(TailBB) && PredBB->canFallThrough())  in tailDuplicate()
762                  << "From Succ: " << *TailBB);  in tailDuplicate()
774     MachineBasicBlock::instr_iterator I = TailBB->instr_begin();  in tailDuplicate()
775     while (I != TailBB->instr_end()) {  in tailDuplicate()
781         processPHI(MI, TailBB, PredBB, LocalVRMap, CopyInfos, UsedByPhi, true);  in tailDuplicate()
785         duplicateInstruction(MI, TailBB, PredBB, MF, LocalVRMap, UsedByPhi);  in tailDuplicate()
793     NumTailDupAdded += TailBB->size() - 1; // subtract one for removed branch  in tailDuplicate()
799     for (MachineBasicBlock::succ_iterator I = TailBB->succ_begin(),  in tailDuplicate()
800                                           E = TailBB->succ_end();  in tailDuplicate()
802       PredBB->addSuccessor(*I, MBPI->getEdgeProbability(TailBB, I));  in tailDuplicate()
811   MachineBasicBlock *PrevBB = &*std::prev(TailBB->getIterator());  in tailDuplicate()
818       PriorCond.empty() && !PriorTBB && TailBB->pred_size() == 1 &&  in tailDuplicate()
819       !TailBB->hasAddressTaken()) {  in tailDuplicate()
821                  << "From MBB: " << *TailBB);  in tailDuplicate()
825       MachineBasicBlock::iterator I = TailBB->begin();  in tailDuplicate()
827       while (I != TailBB->end() && I->isPHI()) {  in tailDuplicate()
831         processPHI(MI, TailBB, PrevBB, LocalVRMap, CopyInfos, UsedByPhi, true);  in tailDuplicate()
835       while (I != TailBB->end()) {  in tailDuplicate()
840         duplicateInstruction(MI, TailBB, PrevBB, MF, LocalVRMap, UsedByPhi);  in tailDuplicate()
846       PrevBB->splice(PrevBB->end(), TailBB, TailBB->begin(), TailBB->end());  in tailDuplicate()
850     PrevBB->transferSuccessors(TailBB);  in tailDuplicate()
890     MachineBasicBlock::iterator I = TailBB->begin();  in tailDuplicate()
892     while (I != TailBB->end() && I->isPHI()) {  in tailDuplicate()
896       processPHI(MI, TailBB, PredBB, LocalVRMap, CopyInfos, UsedByPhi, false);  in tailDuplicate()