49   bool LowerSubregToReg(MachineInstr *MI);
50   bool LowerCopy(MachineInstr *MI);
52   void TransferImplicitDefs(MachineInstr *MI);
66 ExpandPostRA::TransferImplicitDefs(MachineInstr *MI) {  in TransferImplicitDefs()  argument
67   MachineBasicBlock::iterator CopyMI = MI;  in TransferImplicitDefs()
70   for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {  in TransferImplicitDefs()
71     MachineOperand &MO = MI->getOperand(i);  in TransferImplicitDefs()
78 bool ExpandPostRA::LowerSubregToReg(MachineInstr *MI) {  in LowerSubregToReg()  argument
79   MachineBasicBlock *MBB = MI->getParent();  in LowerSubregToReg()
80   assert((MI->getOperand(0).isReg() && MI->getOperand(0).isDef()) &&  in LowerSubregToReg()
81          MI->getOperand(1).isImm() &&  in LowerSubregToReg()
82          (MI->getOperand(2).isReg() && MI->getOperand(2).isUse()) &&  in LowerSubregToReg()
83           MI->getOperand(3).isImm() && "Invalid subreg_to_reg");  in LowerSubregToReg()
85   unsigned DstReg  = MI->getOperand(0).getReg();  in LowerSubregToReg()
86   unsigned InsReg  = MI->getOperand(2).getReg();  in LowerSubregToReg()
87   assert(!MI->getOperand(2).getSubReg() && "SubIdx on physreg?");  in LowerSubregToReg()
88   unsigned SubIdx  = MI->getOperand(3).getImm();  in LowerSubregToReg()
98   DEBUG(dbgs() << "subreg: CONVERTING: " << *MI);  in LowerSubregToReg()
100   if (MI->allDefsAreDead()) {  in LowerSubregToReg()
101     MI->setDesc(TII->get(TargetOpcode::KILL));  in LowerSubregToReg()
102     DEBUG(dbgs() << "subreg: replaced by: " << *MI);  in LowerSubregToReg()
112       MI->setDesc(TII->get(TargetOpcode::KILL));  in LowerSubregToReg()
113       MI->RemoveOperand(3);     // SubIdx  in LowerSubregToReg()
114       MI->RemoveOperand(1);     // Imm  in LowerSubregToReg()
115       DEBUG(dbgs() << "subreg: replace by: " << *MI);  in LowerSubregToReg()
120     TII->copyPhysReg(*MBB, MI, MI->getDebugLoc(), DstSubReg, InsReg,  in LowerSubregToReg()
121                      MI->getOperand(2).isKill());  in LowerSubregToReg()
124     MachineBasicBlock::iterator CopyMI = MI;  in LowerSubregToReg()
131   MBB->erase(MI);  in LowerSubregToReg()
135 bool ExpandPostRA::LowerCopy(MachineInstr *MI) {  in LowerCopy()  argument
137   if (MI->allDefsAreDead()) {  in LowerCopy()
138     DEBUG(dbgs() << "dead copy: " << *MI);  in LowerCopy()
139     MI->setDesc(TII->get(TargetOpcode::KILL));  in LowerCopy()
140     DEBUG(dbgs() << "replaced by: " << *MI);  in LowerCopy()
144   MachineOperand &DstMO = MI->getOperand(0);  in LowerCopy()
145   MachineOperand &SrcMO = MI->getOperand(1);  in LowerCopy()
148     DEBUG(dbgs() << "identity copy: " << *MI);  in LowerCopy()
151     if (SrcMO.isUndef() || MI->getNumOperands() > 2) {  in LowerCopy()
154       MI->setDesc(TII->get(TargetOpcode::KILL));  in LowerCopy()
155       DEBUG(dbgs() << "replaced by:   " << *MI);  in LowerCopy()
159     MI->eraseFromParent();  in LowerCopy()
163   DEBUG(dbgs() << "real copy:   " << *MI);  in LowerCopy()
164   TII->copyPhysReg(*MI->getParent(), MI, MI->getDebugLoc(),  in LowerCopy()
167   if (MI->getNumOperands() > 2)  in LowerCopy()
168     TransferImplicitDefs(MI);  in LowerCopy()
170     MachineBasicBlock::iterator dMI = MI;  in LowerCopy()
173   MI->eraseFromParent();  in LowerCopy()
193       MachineInstr *MI = mi;  in runOnMachineFunction()  local
198       if (!MI->isPseudo())  in runOnMachineFunction()
202       if (TII->expandPostRAPseudo(MI)) {  in runOnMachineFunction()
208       switch (MI->getOpcode()) {  in runOnMachineFunction()
210         MadeChange |= LowerSubregToReg(MI);  in runOnMachineFunction()
213         MadeChange |= LowerCopy(MI);  in runOnMachineFunction()