void AVRInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned SrcReg, bool isKill,
int FrameIndex,
const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI) const {
MachineFunction &MF = *MBB.getParent();
DebugLoc DL;
if (MI != MBB.end()) {
DL = MI->getDebugLoc();
}
const MachineFrameInfo &MFI = *MF.getFrameInfo();
MachineMemOperand *MMO = MF.getMachineMemOperand(
MachinePointerInfo::getFixedStack(MF, FrameIndex),
MachineMemOperand::MOStore, MFI.getObjectSize(FrameIndex),
MFI.getObjectAlignment(FrameIndex));
unsigned Opcode = 0;
if (RC->hasType(MVT::i8)) {
Opcode = AVR::STDPtrQRr;
} else if (RC->hasType(MVT::i16)) {
Opcode = AVR::STDWPtrQRr;
} else {
llvm_unreachable("Cannot store this register into a stack slot!");
}
BuildMI(MBB, MI, DL, get(Opcode))
.addFrameIndex(FrameIndex)
.addImm(0)
.addReg(SrcReg, getKillRegState(isKill))
.addMemOperand(MMO);
}
void AVRInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
const DebugLoc &DL, unsigned DestReg,
unsigned SrcReg, bool KillSrc) const {
unsigned Opc;
if (AVR::GPR8RegClass.contains(DestReg, SrcReg)) {
Opc = AVR::MOVRdRr;
} else if (AVR::DREGSRegClass.contains(DestReg, SrcReg)) {
Opc = AVR::MOVWRdRr;
} else if (SrcReg == AVR::SP && AVR::DREGSRegClass.contains(DestReg)) {
Opc = AVR::SPREAD;
} else if (DestReg == AVR::SP && AVR::DREGSRegClass.contains(SrcReg)) {
Opc = AVR::SPWRITE;
} else {
llvm_unreachable("Impossible reg-to-reg copy");
}
BuildMI(MBB, MI, DL, get(Opc), DestReg)
.addReg(SrcReg, getKillRegState(KillSrc));
}
bool AVRFrameLowering::spillCalleeSavedRegisters(
MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
const std::vector<CalleeSavedInfo> &CSI,
const TargetRegisterInfo *TRI) const {
if (CSI.empty()) {
return false;
}
unsigned CalleeFrameSize = 0;
DebugLoc DL = MBB.findDebugLoc(MI);
MachineFunction &MF = *MBB.getParent();
const AVRSubtarget &STI = MF.getSubtarget<AVRSubtarget>();
const TargetInstrInfo &TII = *STI.getInstrInfo();
AVRMachineFunctionInfo *AVRFI = MF.getInfo<AVRMachineFunctionInfo>();
for (unsigned i = CSI.size(); i != 0; --i) {
unsigned Reg = CSI[i - 1].getReg();
bool IsNotLiveIn = !MBB.isLiveIn(Reg);
assert(TRI->getRegSizeInBits(*TRI->getMinimalPhysRegClass(Reg)) == 8 &&
"Invalid register size");
// Add the callee-saved register as live-in only if it is not already a
// live-in register, this usually happens with arguments that are passed
// through callee-saved registers.
if (IsNotLiveIn) {
MBB.addLiveIn(Reg);
}
// Do not kill the register when it is an input argument.
BuildMI(MBB, MI, DL, TII.get(AVR::PUSHRr))
.addReg(Reg, getKillRegState(IsNotLiveIn))
.setMIFlag(MachineInstr::FrameSetup);
++CalleeFrameSize;
}
AVRFI->setCalleeSavedFrameSize(CalleeFrameSize);
return true;
}
