"Thumb1 can only copy GPR registers");
}
-bool Thumb1InstrInfo::
-canFoldMemoryOperand(const MachineInstr *MI,
- const SmallVectorImpl<unsigned> &Ops) const {
- if (Ops.size() != 1) return false;
-
- unsigned OpNum = Ops[0];
- unsigned Opc = MI->getOpcode();
- switch (Opc) {
- default: break;
- case ARM::tMOVr:
- case ARM::tMOVtgpr2gpr:
- case ARM::tMOVgpr2tgpr:
- case ARM::tMOVgpr2gpr: {
- if (OpNum == 0) { // move -> store
- unsigned SrcReg = MI->getOperand(1).getReg();
- if (TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
- !isARMLowRegister(SrcReg))
- // tSpill cannot take a high register operand.
- return false;
- } else { // move -> load
- unsigned DstReg = MI->getOperand(0).getReg();
- if (TargetRegisterInfo::isPhysicalRegister(DstReg) &&
- !isARMLowRegister(DstReg))
- // tRestore cannot target a high register operand.
- return false;
- }
- return true;
- }
- }
-
- return false;
-}
-
void Thumb1InstrInfo::
storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
unsigned SrcReg, bool isKill, int FI,
return true;
}
-
-MachineInstr *Thumb1InstrInfo::
-foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
- const SmallVectorImpl<unsigned> &Ops, int FI) const {
- if (Ops.size() != 1) return NULL;
-
- unsigned OpNum = Ops[0];
- unsigned Opc = MI->getOpcode();
- MachineInstr *NewMI = NULL;
- switch (Opc) {
- default: break;
- case ARM::tMOVr:
- case ARM::tMOVtgpr2gpr:
- case ARM::tMOVgpr2tgpr:
- case ARM::tMOVgpr2gpr: {
- if (OpNum == 0) { // move -> store
- unsigned SrcReg = MI->getOperand(1).getReg();
- bool isKill = MI->getOperand(1).isKill();
- if (TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
- !isARMLowRegister(SrcReg))
- // tSpill cannot take a high register operand.
- break;
- NewMI = AddDefaultPred(BuildMI(MF, MI->getDebugLoc(), get(ARM::tSpill))
- .addReg(SrcReg, getKillRegState(isKill))
- .addFrameIndex(FI).addImm(0));
- } else { // move -> load
- unsigned DstReg = MI->getOperand(0).getReg();
- if (TargetRegisterInfo::isPhysicalRegister(DstReg) &&
- !isARMLowRegister(DstReg))
- // tRestore cannot target a high register operand.
- break;
- bool isDead = MI->getOperand(0).isDead();
- NewMI = AddDefaultPred(BuildMI(MF, MI->getDebugLoc(), get(ARM::tRestore))
- .addReg(DstReg,
- RegState::Define | getDeadRegState(isDead))
- .addFrameIndex(FI).addImm(0));
- }
- break;
- }
- }
-
- return NewMI;
-}