201       MachineInstr *Def = Op->getParent();  in eraseInstrWithNoUses()  local
205       if (DeadInstr.find(Def) != DeadInstr.end())  in eraseInstrWithNoUses()
212       for (MachineOperand &MODef : Def->operands()) {  in eraseInstrWithNoUses()
222           if (&Use == Def)  in eraseInstrWithNoUses()
233       LLVM_DEBUG(dbgs() << "Deleting instruction " << *Def << "\n");  in eraseInstrWithNoUses()
234       DeadInstr.insert(Def);  in eraseInstrWithNoUses()
303       MachineInstr *Def = MRI->getVRegDef(OpReg);  in optimizeSDPattern()  local
304       if (!Def)  in optimizeSDPattern()
306       if (Def->isImplicitDef())  in optimizeSDPattern()
346   MachineInstr *Def = MRI->getVRegDef(MI->getOperand(1).getReg());  in elideCopies()  local
347   if (!Def)  in elideCopies()
349   return elideCopies(Def);  in elideCopies()
605     MachineInstr *Def = MRI->getVRegDef(*I);  in runOnInstruction()  local
606     if (!Def)  in runOnInstruction()
609     elideCopiesAndPHIs(Def, DefSrcs);  in runOnInstruction()