- NewRC = I->getRegClassConstraintEffect(I.getOperandNo(), NewRC, TII,
- getTargetRegisterInfo());
+ MachineInstr *MI = MO.getParent();
+ unsigned OpNo = &MO - &MI->getOperand(0);
+ NewRC = MI->getRegClassConstraintEffect(OpNo, NewRC, TII,
+ getTargetRegisterInfo());