357     MachineInstr *MI, MachineBasicBlock *TailBB, MachineBasicBlock *PredBB,  in processPHI()  argument
373   if (isDefLiveOut(DefReg, TailBB, MRI) || RegsUsedByPhi.count(DefReg))  in processPHI()
382   if (MI->getNumOperands() == 1 && !TailBB->hasAddressTaken())  in processPHI()
391     MachineInstr *MI, MachineBasicBlock *TailBB, MachineBasicBlock *PredBB,  in duplicateInstruction()  argument
416         if (isDefLiveOut(Reg, TailBB, MRI) || UsedByPhi.count(Reg))  in duplicateInstruction()
566                                          MachineBasicBlock &TailBB) {  in shouldTailDuplicate()  argument
570   if (!LayoutMode && TailBB.canFallThrough())  in shouldTailDuplicate()
574   if (TailBB.isSuccessor(&TailBB))  in shouldTailDuplicate()
581   if (TailBB.pred_size() > TailDupPredSize &&  in shouldTailDuplicate()
582       TailBB.succ_size() > TailDupSuccSize)  in shouldTailDuplicate()
590                     llvm::shouldOptimizeForSize(&TailBB, PSI, MBFI);  in shouldTailDuplicate()
604   if (TII->analyzeBranch(TailBB, PredTBB, PredFBB, PredCond) &&  in shouldTailDuplicate()
605       TailBB.canFallThrough())  in shouldTailDuplicate()
615   if (!TailBB.empty())  in shouldTailDuplicate()
616     HasIndirectbr = TailBB.back().isIndirectBranch();  in shouldTailDuplicate()
624   for (MachineInstr &MI : TailBB) {  in shouldTailDuplicate()
631         (TailBB.getParent()->getTarget().getTargetTriple().isOSDarwin() ||  in shouldTailDuplicate()
678   for (auto *SB : TailBB.successors()) {  in shouldTailDuplicate()
682       unsigned Idx = getPHISrcRegOpIdx(&I, &TailBB);  in shouldTailDuplicate()
699   return canCompletelyDuplicateBB(TailBB);  in shouldTailDuplicate()
703 bool TailDuplicator::isSimpleBB(MachineBasicBlock *TailBB) {  in isSimpleBB()  argument
704   if (TailBB->succ_size() != 1)  in isSimpleBB()
706   if (TailBB->pred_empty())  in isSimpleBB()
708   MachineBasicBlock::iterator I = TailBB->getFirstNonDebugInstr(true);  in isSimpleBB()
709   if (I == TailBB->end())  in isSimpleBB()
740     MachineBasicBlock *TailBB, SmallVectorImpl<MachineBasicBlock *> &TDBBs,  in duplicateSimpleBB()  argument
742   SmallPtrSet<MachineBasicBlock *, 8> Succs(TailBB->succ_begin(),  in duplicateSimpleBB()
743                                             TailBB->succ_end());  in duplicateSimpleBB()
744   SmallVector<MachineBasicBlock *, 8> Preds(TailBB->predecessors());  in duplicateSimpleBB()
760                       << "From simple Succ: " << *TailBB);  in duplicateSimpleBB()
762     MachineBasicBlock *NewTarget = *TailBB->succ_begin();  in duplicateSimpleBB()
776     if (PredFBB == TailBB)  in duplicateSimpleBB()
778     if (PredTBB == TailBB)  in duplicateSimpleBB()
797       PredBB->replaceSuccessor(TailBB, NewTarget);  in duplicateSimpleBB()
799       PredBB->removeSuccessor(TailBB, true);  in duplicateSimpleBB()
811 bool TailDuplicator::canTailDuplicate(MachineBasicBlock *TailBB,  in canTailDuplicate()  argument
830   if (TailBB->isInlineAsmBrIndirectTarget())  in canTailDuplicate()
845 bool TailDuplicator::tailDuplicate(bool IsSimple, MachineBasicBlock *TailBB,  in tailDuplicate()  argument
850   LLVM_DEBUG(dbgs() << "\n*** Tail-duplicating " << printMBBReference(*TailBB)  in tailDuplicate()
853   bool ShouldUpdateTerminators = TailBB->canFallThrough();  in tailDuplicate()
856   getRegsUsedByPHIs(*TailBB, &UsedByPhi);  in tailDuplicate()
859     return duplicateSimpleBB(TailBB, TDBBs, UsedByPhi);  in tailDuplicate()
869     Preds.insert(TailBB->pred_begin(), TailBB->pred_end());  in tailDuplicate()
872     assert(TailBB != PredBB &&  in tailDuplicate()
875     if (!canTailDuplicate(TailBB, PredBB))  in tailDuplicate()
885       else if (PredBB->isLayoutSuccessor(TailBB) && PredBB->canFallThrough())  in tailDuplicate()
892                       << "From Succ: " << *TailBB);  in tailDuplicate()
902     for (MachineInstr &MI : llvm::make_early_inc_range(*TailBB)) {  in tailDuplicate()
906         processPHI(&MI, TailBB, PredBB, LocalVRMap, CopyInfos, UsedByPhi, true);  in tailDuplicate()
910         duplicateInstruction(&MI, TailBB, PredBB, LocalVRMap, UsedByPhi);  in tailDuplicate()
915     NumTailDupAdded += TailBB->size() - 1; // subtract one for removed branch  in tailDuplicate()
921     for (MachineBasicBlock *Succ : TailBB->successors())  in tailDuplicate()
922       PredBB->addSuccessor(Succ, MBPI->getEdgeProbability(TailBB, Succ));  in tailDuplicate()
926       PredBB->updateTerminator(TailBB->getNextNode());  in tailDuplicate()
937     PrevBB = &*std::prev(TailBB->getIterator());  in tailDuplicate()
944       *PrevBB->succ_begin() == TailBB &&  in tailDuplicate()
947       (!PriorTBB || PriorTBB == TailBB) &&  in tailDuplicate()
948       TailBB->pred_size() == 1 &&  in tailDuplicate()
949       !TailBB->hasAddressTaken()) {  in tailDuplicate()
951                       << "From MBB: " << *TailBB);  in tailDuplicate()
962         MachineBasicBlock::iterator I = TailBB->begin();  in tailDuplicate()
964         while (I != TailBB->end() && I->isPHI()) {  in tailDuplicate()
968           processPHI(MI, TailBB, PrevBB, LocalVRMap, CopyInfos, UsedByPhi,  in tailDuplicate()
973         while (I != TailBB->end()) {  in tailDuplicate()
978           duplicateInstruction(MI, TailBB, PrevBB, LocalVRMap, UsedByPhi);  in tailDuplicate()
985         PrevBB->splice(PrevBB->end(), TailBB, TailBB->begin(), TailBB->end());  in tailDuplicate()
989       PrevBB->transferSuccessors(TailBB);  in tailDuplicate()
993         PrevBB->updateTerminator(TailBB->getNextNode());  in tailDuplicate()
1040     for (MachineInstr &MI : make_early_inc_range(TailBB->phis())) {  in tailDuplicate()
1043       processPHI(&MI, TailBB, PredBB, LocalVRMap, CopyInfos, UsedByPhi, false);  in tailDuplicate()