449   auto *DefMI = MRI.getVRegDef(Reg);  in getDefSrcRegIgnoringCopies()  local
450   auto DstTy = MRI.getType(DefMI->getOperand(0).getReg());  in getDefSrcRegIgnoringCopies()
453   unsigned Opc = DefMI->getOpcode();  in getDefSrcRegIgnoringCopies()
455     Register SrcReg = DefMI->getOperand(1).getReg();  in getDefSrcRegIgnoringCopies()
459     DefMI = MRI.getVRegDef(SrcReg);  in getDefSrcRegIgnoringCopies()
461     Opc = DefMI->getOpcode();  in getDefSrcRegIgnoringCopies()
463   return DefinitionAndSourceRegister{DefMI, DefSrcReg};  in getDefSrcRegIgnoringCopies()
628   MachineInstr *DefMI = getDefIgnoringCopies(Reg, MRI);  in getOpcodeDef()  local
629   return DefMI && DefMI->getOpcode() == Opcode ? DefMI : nullptr;  in getOpcodeDef()
789   const MachineInstr *DefMI = MRI.getVRegDef(Val);  in isKnownNeverNaN()  local
790   if (!DefMI)  in isKnownNeverNaN()
793   const TargetMachine& TM = DefMI->getMF()->getTarget();  in isKnownNeverNaN()
794   if (DefMI->getFlag(MachineInstr::FmNoNans) || TM.Options.NoNaNsFPMath)  in isKnownNeverNaN()
803   if (DefMI->getOpcode() == TargetOpcode::G_BUILD_VECTOR) {  in isKnownNeverNaN()
804     for (const auto &Op : DefMI->uses())  in isKnownNeverNaN()
810   switch (DefMI->getOpcode()) {  in isKnownNeverNaN()
833     return (isKnownNeverNaN(DefMI->getOperand(1).getReg(), MRI) &&  in isKnownNeverNaN()
834             isKnownNeverSNaN(DefMI->getOperand(2).getReg(), MRI)) ||  in isKnownNeverNaN()
835            (isKnownNeverSNaN(DefMI->getOperand(1).getReg(), MRI) &&  in isKnownNeverNaN()
836             isKnownNeverNaN(DefMI->getOperand(2).getReg(), MRI));  in isKnownNeverNaN()
842     return isKnownNeverNaN(DefMI->getOperand(1).getReg(), MRI, SNaN) ||  in isKnownNeverNaN()
843            isKnownNeverNaN(DefMI->getOperand(2).getReg(), MRI, SNaN);  in isKnownNeverNaN()
850     switch (DefMI->getOpcode()) {  in isKnownNeverNaN()