Cross Reference: /external/llvm/lib/CodeGen/ExpandPostRAPseudos.cpp

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