Target/SystemZ/SystemZInstrInfo.cpp

452   MachineInstr *RLL = getDef(SrcReg, MRI);
453   if (RLL && RLL->getOpcode() == SystemZ::LGFR) {
454     LGFR = RLL;
455     RLL = getDef(LGFR->getOperand(1).getReg(), MRI);
457   if (!RLL || !isShift(RLL, SystemZ::RLL, 31))
460   MachineInstr *SRL = getDef(RLL->getOperand(1).getReg(), MRI);
481   eraseIfDead(RLL, MRI);