50   bool LowerSubregToReg(MachineInstr *MI);
51   bool LowerCopy(MachineInstr *MI);
53   void TransferImplicitDefs(MachineInstr *MI);
67 ExpandPostRA::TransferImplicitDefs(MachineInstr *MI) {  in TransferImplicitDefs()  argument
68   MachineBasicBlock::iterator CopyMI = MI;  in TransferImplicitDefs()
71   for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {  in TransferImplicitDefs()
72     MachineOperand &MO = MI->getOperand(i);  in TransferImplicitDefs()
79 bool ExpandPostRA::LowerSubregToReg(MachineInstr *MI) {  in LowerSubregToReg()  argument
80   MachineBasicBlock *MBB = MI->getParent();  in LowerSubregToReg()
81   assert((MI->getOperand(0).isReg() && MI->getOperand(0).isDef()) &&  in LowerSubregToReg()
82          MI->getOperand(1).isImm() &&  in LowerSubregToReg()
83          (MI->getOperand(2).isReg() && MI->getOperand(2).isUse()) &&  in LowerSubregToReg()
84           MI->getOperand(3).isImm() && "Invalid subreg_to_reg");  in LowerSubregToReg()
86   unsigned DstReg  = MI->getOperand(0).getReg();  in LowerSubregToReg()
87   unsigned InsReg  = MI->getOperand(2).getReg();  in LowerSubregToReg()
88   assert(!MI->getOperand(2).getSubReg() && "SubIdx on physreg?");  in LowerSubregToReg()
89   unsigned SubIdx  = MI->getOperand(3).getImm();  in LowerSubregToReg()
99   DEBUG(dbgs() << "subreg: CONVERTING: " << *MI);  in LowerSubregToReg()
101   if (MI->allDefsAreDead()) {  in LowerSubregToReg()
102     MI->setDesc(TII->get(TargetOpcode::KILL));  in LowerSubregToReg()
103     DEBUG(dbgs() << "subreg: replaced by: " << *MI);  in LowerSubregToReg()
113       MI->setDesc(TII->get(TargetOpcode::KILL));  in LowerSubregToReg()
114       MI->RemoveOperand(3);     // SubIdx  in LowerSubregToReg()
115       MI->RemoveOperand(1);     // Imm  in LowerSubregToReg()
116       DEBUG(dbgs() << "subreg: replace by: " << *MI);  in LowerSubregToReg()
121     TII->copyPhysReg(*MBB, MI, MI->getDebugLoc(), DstSubReg, InsReg,  in LowerSubregToReg()
122                      MI->getOperand(2).isKill());  in LowerSubregToReg()
125     MachineBasicBlock::iterator CopyMI = MI;  in LowerSubregToReg()
132   MBB->erase(MI);  in LowerSubregToReg()
136 bool ExpandPostRA::LowerCopy(MachineInstr *MI) {  in LowerCopy()  argument
138   if (MI->allDefsAreDead()) {  in LowerCopy()
139     DEBUG(dbgs() << "dead copy: " << *MI);  in LowerCopy()
140     MI->setDesc(TII->get(TargetOpcode::KILL));  in LowerCopy()
141     DEBUG(dbgs() << "replaced by: " << *MI);  in LowerCopy()
145   MachineOperand &DstMO = MI->getOperand(0);  in LowerCopy()
146   MachineOperand &SrcMO = MI->getOperand(1);  in LowerCopy()
149     DEBUG(dbgs() << "identity copy: " << *MI);  in LowerCopy()
152     if (SrcMO.isUndef() || MI->getNumOperands() > 2) {  in LowerCopy()
155       MI->setDesc(TII->get(TargetOpcode::KILL));  in LowerCopy()
156       DEBUG(dbgs() << "replaced by:   " << *MI);  in LowerCopy()
160     MI->eraseFromParent();  in LowerCopy()
164   DEBUG(dbgs() << "real copy:   " << *MI);  in LowerCopy()
165   TII->copyPhysReg(*MI->getParent(), MI, MI->getDebugLoc(),  in LowerCopy()
168   if (MI->getNumOperands() > 2)  in LowerCopy()
169     TransferImplicitDefs(MI);  in LowerCopy()
171     MachineBasicBlock::iterator dMI = MI;  in LowerCopy()
174   MI->eraseFromParent();  in LowerCopy()
194       MachineInstr *MI = mi;  in runOnMachineFunction()  local
199       if (!MI->isPseudo())  in runOnMachineFunction()
203       if (TII->expandPostRAPseudo(MI)) {  in runOnMachineFunction()
209       switch (MI->getOpcode()) {  in runOnMachineFunction()
211         MadeChange |= LowerSubregToReg(MI);  in runOnMachineFunction()
214         MadeChange |= LowerCopy(MI);  in runOnMachineFunction()