203       MachineInstr *Def = Op->getParent();  in eraseInstrWithNoUses()  local
207       if (DeadInstr.find(Def) != DeadInstr.end())  in eraseInstrWithNoUses()
214       for (MachineOperand &MODef : Def->operands()) {  in eraseInstrWithNoUses()
224           if (&Use == Def)  in eraseInstrWithNoUses()
235       LLVM_DEBUG(dbgs() << "Deleting instruction " << *Def << "\n");  in eraseInstrWithNoUses()
236       DeadInstr.insert(Def);  in eraseInstrWithNoUses()
305       MachineInstr *Def = MRI->getVRegDef(OpReg);  in optimizeSDPattern()  local
306       if (!Def)  in optimizeSDPattern()
308       if (Def->isImplicitDef())  in optimizeSDPattern()
348   MachineInstr *Def = MRI->getVRegDef(MI->getOperand(1).getReg());  in elideCopies()  local
349   if (!Def)  in elideCopies()
351   return elideCopies(Def);  in elideCopies()
608     MachineInstr *Def = MRI->getVRegDef(*I);  in runOnInstruction()  local
609     if (!Def)  in runOnInstruction()
612     elideCopiesAndPHIs(Def, DefSrcs);  in runOnInstruction()