bool HexagonCP::interpretAsCopy(const MachineInstr *MI, EqualityMap &EM) {
auto mapRegs = [MI,&EM] (RegisterRef DstR, RegisterRef SrcR) -> void {
EM.insert(std::make_pair(DstR, SrcR));
};
unsigned Opc = MI->getOpcode();
switch (Opc) {
case Hexagon::A2_combinew: {
const MachineOperand &DstOp = MI->getOperand(0);
const MachineOperand &HiOp = MI->getOperand(1);
const MachineOperand &LoOp = MI->getOperand(2);
assert(DstOp.getSubReg() == 0 && "Unexpected subregister");
mapRegs({ DstOp.getReg(), Hexagon::subreg_hireg },
{ HiOp.getReg(), HiOp.getSubReg() });
mapRegs({ DstOp.getReg(), Hexagon::subreg_loreg },
{ LoOp.getReg(), LoOp.getSubReg() });
return true;
}
case Hexagon::A2_addi: {
const MachineOperand &A = MI->getOperand(2);
if (!A.isImm() || A.getImm() != 0)
return false;
}
// Fall through.
case Hexagon::A2_tfr: {
const MachineOperand &DstOp = MI->getOperand(0);
const MachineOperand &SrcOp = MI->getOperand(1);
mapRegs({ DstOp.getReg(), DstOp.getSubReg() },
{ SrcOp.getReg(), SrcOp.getSubReg() });
return true;
}
}
return CopyPropagation::interpretAsCopy(MI, EM);
}
bool CopyPropagation::interpretAsCopy(const MachineInstr *MI, EqualityMap &EM) {
unsigned Opc = MI->getOpcode();
switch (Opc) {
case TargetOpcode::COPY: {
const MachineOperand &Dst = MI->getOperand(0);
const MachineOperand &Src = MI->getOperand(1);
RegisterRef DstR = { Dst.getReg(), Dst.getSubReg() };
RegisterRef SrcR = { Src.getReg(), Src.getSubReg() };
if (TargetRegisterInfo::isVirtualRegister(DstR.Reg)) {
if (!TargetRegisterInfo::isVirtualRegister(SrcR.Reg))
return false;
MachineRegisterInfo &MRI = DFG.getMF().getRegInfo();
if (MRI.getRegClass(DstR.Reg) != MRI.getRegClass(SrcR.Reg))
return false;
} else if (TargetRegisterInfo::isPhysicalRegister(DstR.Reg)) {
if (!TargetRegisterInfo::isPhysicalRegister(SrcR.Reg))
return false;
const TargetRegisterInfo &TRI = DFG.getTRI();
if (TRI.getMinimalPhysRegClass(DstR.Reg) !=
TRI.getMinimalPhysRegClass(SrcR.Reg))
return false;
} else {
// Copy between some unknown objects.
return false;
}
EM.insert(std::make_pair(DstR, SrcR));
return true;
}
case TargetOpcode::REG_SEQUENCE: {
const MachineOperand &Dst = MI->getOperand(0);
RegisterRef DefR = { Dst.getReg(), Dst.getSubReg() };
SmallVector<TargetInstrInfo::RegSubRegPairAndIdx,2> Inputs;
const TargetInstrInfo &TII = DFG.getTII();
if (!TII.getRegSequenceInputs(*MI, 0, Inputs))
return false;
for (auto I : Inputs) {
unsigned S = DFG.getTRI().composeSubRegIndices(DefR.Sub, I.SubIdx);
RegisterRef DR = { DefR.Reg, S };
RegisterRef SR = { I.Reg, I.SubReg };
EM.insert(std::make_pair(DR, SR));
}
return true;
}
}
return false;
}
bool CopyPropagation::interpretAsCopy(const MachineInstr *MI, EqualityMap &EM) {
unsigned Opc = MI->getOpcode();
switch (Opc) {
case TargetOpcode::COPY: {
const MachineOperand &Dst = MI->getOperand(0);
const MachineOperand &Src = MI->getOperand(1);
RegisterRef DstR = DFG.makeRegRef(Dst.getReg(), Dst.getSubReg());
RegisterRef SrcR = DFG.makeRegRef(Src.getReg(), Src.getSubReg());
assert(TargetRegisterInfo::isPhysicalRegister(DstR.Reg));
assert(TargetRegisterInfo::isPhysicalRegister(SrcR.Reg));
const TargetRegisterInfo &TRI = DFG.getTRI();
if (TRI.getMinimalPhysRegClass(DstR.Reg) !=
TRI.getMinimalPhysRegClass(SrcR.Reg))
return false;
EM.insert(std::make_pair(DstR, SrcR));
return true;
}
case TargetOpcode::REG_SEQUENCE:
llvm_unreachable("Unexpected REG_SEQUENCE");
}
return false;
}
bool HexagonCP::interpretAsCopy(const MachineInstr *MI, EqualityMap &EM) {
auto mapRegs = [MI,&EM] (RegisterRef DstR, RegisterRef SrcR) -> void {
EM.insert(std::make_pair(DstR, SrcR));
};
DataFlowGraph &DFG = getDFG();
unsigned Opc = MI->getOpcode();
switch (Opc) {
case Hexagon::A2_combinew: {
const MachineOperand &DstOp = MI->getOperand(0);
const MachineOperand &HiOp = MI->getOperand(1);
const MachineOperand &LoOp = MI->getOperand(2);
assert(DstOp.getSubReg() == 0 && "Unexpected subregister");
mapRegs(DFG.makeRegRef(DstOp.getReg(), Hexagon::isub_hi),
DFG.makeRegRef(HiOp.getReg(), HiOp.getSubReg()));
mapRegs(DFG.makeRegRef(DstOp.getReg(), Hexagon::isub_lo),
DFG.makeRegRef(LoOp.getReg(), LoOp.getSubReg()));
return true;
}
case Hexagon::A2_addi: {
const MachineOperand &A = MI->getOperand(2);
if (!A.isImm() || A.getImm() != 0)
return false;
LLVM_FALLTHROUGH;
}
case Hexagon::A2_tfr: {
const MachineOperand &DstOp = MI->getOperand(0);
const MachineOperand &SrcOp = MI->getOperand(1);
mapRegs(DFG.makeRegRef(DstOp.getReg(), DstOp.getSubReg()),
DFG.makeRegRef(SrcOp.getReg(), SrcOp.getSubReg()));
return true;
}
}
return CopyPropagation::interpretAsCopy(MI, EM);
}