68     bool EliminatePHINodes(MachineFunction &MF, MachineBasicBlock &MBB);
69     void LowerPHINode(MachineBasicBlock &MBB,
81     bool SplitPHIEdges(MachineFunction &MF, MachineBasicBlock &MBB,
86     bool isLiveIn(unsigned Reg, MachineBasicBlock *MBB);
87     bool isLiveOutPastPHIs(unsigned Reg, MachineBasicBlock *MBB);
183                                              MachineBasicBlock &MBB) {  in EliminatePHINodes()  argument
184   if (MBB.empty() || !MBB.front().isPHI())  in EliminatePHINodes()
190     std::prev(MBB.SkipPHIsAndLabels(MBB.begin()));  in EliminatePHINodes()
192   while (MBB.front().isPHI())  in EliminatePHINodes()
193     LowerPHINode(MBB, LastPHIIt);  in EliminatePHINodes()
221 void PHIElimination::LowerPHINode(MachineBasicBlock &MBB,  in LowerPHINode()  argument
228   MachineInstr *MPhi = MBB.remove(MBB.begin());  in LowerPHINode()
236   MachineFunction &MF = *MBB.getParent();  in LowerPHINode()
247     BuildMI(MBB, AfterPHIsIt, MPhi->getDebugLoc(),  in LowerPHINode()
263     BuildMI(MBB, AfterPHIsIt, MPhi->getDebugLoc(),  in LowerPHINode()
282         if (MachineInstr *OldKill = VI.findKill(&MBB)) {  in LowerPHINode()
285           DEBUG(MBB.dump());  in LowerPHINode()
312     SlotIndex MBBStartIndex = LIS->getMBBStartIdx(&MBB);  in LowerPHINode()
378       findPHICopyInsertPoint(&opBlock, &MBB, SrcReg);  in LowerPHINode()
535   for (const auto &MBB : MF)  in analyzePHINodes()  local
536     for (const auto &BBI : MBB) {  in analyzePHINodes()
546                                    MachineBasicBlock &MBB,  in SplitPHIEdges()  argument
548   if (MBB.empty() || !MBB.front().isPHI() || MBB.isLandingPad())  in SplitPHIEdges()
551   const MachineLoop *CurLoop = MLI ? MLI->getLoopFor(&MBB) : nullptr;  in SplitPHIEdges()
552   bool IsLoopHeader = CurLoop && &MBB == CurLoop->getHeader();  in SplitPHIEdges()
555   for (MachineBasicBlock::iterator BBI = MBB.begin(), BBE = MBB.end();  in SplitPHIEdges()
566       if (PreMBB == &MBB && !SplitAllCriticalEdges)  in SplitPHIEdges()
582                    << PreMBB->getNumber() << " -> BB#" << MBB.getNumber()  in SplitPHIEdges()
593       bool ShouldSplit = !isLiveIn(Reg, &MBB) || SplitAllCriticalEdges;  in SplitPHIEdges()
610       if (!PreMBB->SplitCriticalEdge(&MBB, this)) {  in SplitPHIEdges()
621 bool PHIElimination::isLiveIn(unsigned Reg, MachineBasicBlock *MBB) {  in isLiveIn()  argument
625     return LIS->isLiveInToMBB(LIS->getInterval(Reg), MBB);  in isLiveIn()
627     return LV->isLiveIn(Reg, *MBB);  in isLiveIn()
630 bool PHIElimination::isLiveOutPastPHIs(unsigned Reg, MachineBasicBlock *MBB) {  in isLiveOutPastPHIs()  argument
640     for (MachineBasicBlock::succ_iterator SI = MBB->succ_begin(),  in isLiveOutPastPHIs()
641          SE = MBB->succ_end(); SI != SE; ++SI) {  in isLiveOutPastPHIs()
647     return LV->isLiveOut(Reg, *MBB);  in isLiveOutPastPHIs()