168                               MachineBasicBlock *SuccToSinkTo,
519                                           MachineBasicBlock *SuccToSinkTo,  in isProfitableToSinkTo()  argument
521   assert (SuccToSinkTo && "Invalid SinkTo Candidate BB");  in isProfitableToSinkTo()
523   if (MBB == SuccToSinkTo)  in isProfitableToSinkTo()
527   if (!PDT->dominates(SuccToSinkTo, MBB))  in isProfitableToSinkTo()
532   if (LI->getLoopDepth(MBB) > LI->getLoopDepth(SuccToSinkTo))  in isProfitableToSinkTo()
539     if (UseBlock == SuccToSinkTo && !UseInst.isPHI())  in isProfitableToSinkTo()
550           FindSuccToSinkTo(MI, SuccToSinkTo, BreakPHIEdge, AllSuccessors))  in isProfitableToSinkTo()
551     return isProfitableToSinkTo(Reg, MI, SuccToSinkTo, MBB2, AllSuccessors);  in isProfitableToSinkTo()
615   MachineBasicBlock *SuccToSinkTo = nullptr;  in FindSuccToSinkTo()  local
644       if (SuccToSinkTo) {  in FindSuccToSinkTo()
648         if (!AllUsesDominatedByBlock(Reg, SuccToSinkTo, MBB,  in FindSuccToSinkTo()
664           SuccToSinkTo = SuccBlock;  in FindSuccToSinkTo()
673       if (!SuccToSinkTo)  in FindSuccToSinkTo()
675       if (!isProfitableToSinkTo(Reg, MI, MBB, SuccToSinkTo, AllSuccessors))  in FindSuccToSinkTo()
682   if (MBB == SuccToSinkTo)  in FindSuccToSinkTo()
687   if (SuccToSinkTo && SuccToSinkTo->isEHPad())  in FindSuccToSinkTo()
690   return SuccToSinkTo;  in FindSuccToSinkTo()
742 static void performSink(MachineInstr &MI, MachineBasicBlock &SuccToSinkTo,  in performSink()  argument
756   if (!SuccToSinkTo.empty() && InsertPos != SuccToSinkTo.end())  in performSink()
764   SuccToSinkTo.splice(InsertPos, ParentBlock, MI,  in performSink()
772     SuccToSinkTo.splice(InsertPos, ParentBlock, DbgMI,  in performSink()
809   MachineBasicBlock *SuccToSinkTo =  in SinkInstruction()  local
813   if (!SuccToSinkTo)  in SinkInstruction()
824     if (SuccToSinkTo->isLiveIn(Reg))  in SinkInstruction()
828   LLVM_DEBUG(dbgs() << "Sink instr " << MI << "\tinto block " << *SuccToSinkTo);  in SinkInstruction()
832   if (SuccToSinkTo->pred_size() > 1) {  in SinkInstruction()
844     if (!TryBreak && !DT->dominates(ParentBlock, SuccToSinkTo)) {  in SinkInstruction()
850     if (!TryBreak && LI->isLoopHeader(SuccToSinkTo)) {  in SinkInstruction()
863         PostponeSplitCriticalEdge(MI, ParentBlock, SuccToSinkTo, BreakPHIEdge);  in SinkInstruction()
877                                             SuccToSinkTo, BreakPHIEdge);  in SinkInstruction()
886   MachineBasicBlock::iterator InsertPos = SuccToSinkTo->begin();  in SinkInstruction()
887   while (InsertPos != SuccToSinkTo->end() && InsertPos->isPHI())  in SinkInstruction()
890   performSink(MI, *SuccToSinkTo, InsertPos);  in SinkInstruction()