lib/CodeGen/LiveVariables.cpp

196   MachineInstr *LastDef = nullptr;
205       LastDef     = Def;
210   if (!LastDef)
214   for (unsigned i = 0, e = LastDef->getNumOperands(); i != e; ++i) {
215     MachineOperand &MO = LastDef->getOperand(i);
225   return LastDef;
232   MachineInstr *LastDef = PhysRegDef[Reg];
234   if (!LastDef && !PhysRegUse[Reg]) {
267   } else if (LastDef && !PhysRegUse[Reg] &&
268              !LastDef->findRegisterDefOperand(Reg))
270     LastDef->addOperand(MachineOperand::CreateReg(Reg, true/*IsDef*/,
282   MachineInstr *LastDef = PhysRegDef[Reg];
284   if (!LastDef && !LastUse)
287   MachineInstr *LastRefOrPartRef = LastUse ? LastUse : LastDef;
293     if (Def && Def != LastDef) {
312   MachineInstr *LastDef = PhysRegDef[Reg];
314   if (!LastDef && !LastUse)
317   MachineInstr *LastRefOrPartRef = LastUse ? LastUse : LastDef;
342     if (Def && Def != LastDef) {