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Code clean up.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49783 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -728,103 +728,87 @@ void MachineInstr::print(std::ostream &OS, const TargetMachine *TM) const {
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bool MachineInstr::addRegisterKilled(unsigned IncomingReg,
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const TargetRegisterInfo *RegInfo,
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bool AddIfNotFound) {
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// Go through the machine instruction's operands to eliminate any potentially
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// illegal conditions. I.e., a super- and sub-register both marked "kill".
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for (unsigned i = 0, e = getNumOperands(); i < e;) {
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MachineOperand &MO = getOperand(i);
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if (MO.isRegister() && MO.isUse()) {
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unsigned Reg = MO.getReg();
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if (!Reg || IncomingReg == Reg ||
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!TargetRegisterInfo::isPhysicalRegister(Reg) ||
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!TargetRegisterInfo::isPhysicalRegister(IncomingReg)) {
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++i;
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continue;
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}
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if (RegInfo->isSuperRegister(IncomingReg, Reg) && MO.isKill())
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// The kill information is already handled by a super-register. Don't
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// add this sub-register as a kill.
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return true;
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if (RegInfo->isSubRegister(IncomingReg, Reg) && MO.isKill()) {
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if (MO.isImplicit()) {
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// Remove this implicit use that marks the sub-register
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// "kill". Let the super-register take care of this
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// information.
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RemoveOperand(i);
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--e;
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continue;
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} else {
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// The super-register is going to take care of this kill
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// information.
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MO.setIsKill(false);
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}
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}
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}
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++i;
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}
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// If the register already exists, then make sure it or its super-register is
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// marked "kill".
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bool isPhysReg = TargetRegisterInfo::isPhysicalRegister(IncomingReg);
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bool Found = false;
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SmallVector<unsigned,4> DeadOps;
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for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
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MachineOperand &MO = getOperand(i);
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if (!MO.isRegister() || !MO.isUse())
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continue;
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unsigned Reg = MO.getReg();
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if (!Reg)
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continue;
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if (MO.isRegister() && MO.isUse()) {
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unsigned Reg = MO.getReg();
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if (!Reg) continue;
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if (Reg == IncomingReg) {
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if (Reg == IncomingReg) {
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if (!Found) // One kill of reg per instruction.
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MO.setIsKill();
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return true;
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}
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if (TargetRegisterInfo::isPhysicalRegister(Reg) &&
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TargetRegisterInfo::isPhysicalRegister(IncomingReg) &&
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RegInfo->isSuperRegister(IncomingReg, Reg) &&
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MO.isKill())
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// A super-register kill already exists.
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return true;
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Found = true;
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} else if (isPhysReg && MO.isKill() &&
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TargetRegisterInfo::isPhysicalRegister(Reg)) {
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// A super-register kill already exists.
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if (RegInfo->isSuperRegister(IncomingReg, Reg))
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Found = true;
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else if (RegInfo->isSubRegister(IncomingReg, Reg))
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DeadOps.push_back(i);
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}
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}
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// Trim unneeded kill operands.
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while (!DeadOps.empty()) {
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unsigned OpIdx = DeadOps.back();
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if (getOperand(OpIdx).isImplicit())
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RemoveOperand(OpIdx);
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else
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getOperand(OpIdx).setIsKill(false);
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DeadOps.pop_back();
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}
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// If not found, this means an alias of one of the operands is killed. Add a
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// new implicit operand if required.
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if (AddIfNotFound) {
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if (!Found && AddIfNotFound) {
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addOperand(MachineOperand::CreateReg(IncomingReg,
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false /*IsDef*/,
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true /*IsImp*/,
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true /*IsKill*/));
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return true;
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}
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return false;
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return Found;
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}
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bool MachineInstr::addRegisterDead(unsigned IncomingReg,
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const TargetRegisterInfo *RegInfo,
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bool AddIfNotFound) {
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bool isPhysReg = TargetRegisterInfo::isPhysicalRegister(IncomingReg);
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bool Found = false;
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SmallVector<unsigned,4> DeadOps;
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for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
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MachineOperand &MO = getOperand(i);
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if (MO.isRegister() && MO.isDef()) {
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unsigned Reg = MO.getReg();
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if (!Reg)
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continue;
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if (Reg == IncomingReg) {
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MO.setIsDead();
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if (!MO.isRegister() || !MO.isDef())
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continue;
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unsigned Reg = MO.getReg();
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if (Reg == IncomingReg) {
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MO.setIsDead();
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Found = true;
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} else if (isPhysReg && MO.isDead() &&
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TargetRegisterInfo::isPhysicalRegister(Reg)) {
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// There exists a super-register that's marked dead.
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if (RegInfo->isSuperRegister(IncomingReg, Reg))
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Found = true;
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break;
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} else if (TargetRegisterInfo::isPhysicalRegister(Reg) &&
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TargetRegisterInfo::isPhysicalRegister(IncomingReg) &&
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RegInfo->isSuperRegister(IncomingReg, Reg) &&
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MO.isDead())
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// There exists a super-register that's marked dead.
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return true;
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else if (RegInfo->isSubRegister(IncomingReg, Reg))
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DeadOps.push_back(i);
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}
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}
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// Trim unneeded dead operands.
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while (!DeadOps.empty()) {
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unsigned OpIdx = DeadOps.back();
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if (getOperand(OpIdx).isImplicit())
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RemoveOperand(OpIdx);
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else
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getOperand(OpIdx).setIsDead(false);
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DeadOps.pop_back();
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}
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// If not found, this means an alias of one of the operand is dead. Add a
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// new implicit operand.
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if (!Found && AddIfNotFound) {
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