79     case AArch64::LDADDB:     case AArch64::LDADDH:  in atomicReadDroppedOnZero()
80     case AArch64::LDADDW:     case AArch64::LDADDX:  in atomicReadDroppedOnZero()
81     case AArch64::LDADDLB:    case AArch64::LDADDLH:  in atomicReadDroppedOnZero()
82     case AArch64::LDADDLW:    case AArch64::LDADDLX:  in atomicReadDroppedOnZero()
83     case AArch64::LDCLRB:     case AArch64::LDCLRH:  in atomicReadDroppedOnZero()
84     case AArch64::LDCLRW:     case AArch64::LDCLRX:  in atomicReadDroppedOnZero()
85     case AArch64::LDCLRLB:    case AArch64::LDCLRLH:  in atomicReadDroppedOnZero()
86     case AArch64::LDCLRLW:    case AArch64::LDCLRLX:  in atomicReadDroppedOnZero()
87     case AArch64::LDEORB:     case AArch64::LDEORH:  in atomicReadDroppedOnZero()
88     case AArch64::LDEORW:     case AArch64::LDEORX:  in atomicReadDroppedOnZero()
89     case AArch64::LDEORLB:    case AArch64::LDEORLH:  in atomicReadDroppedOnZero()
90     case AArch64::LDEORLW:    case AArch64::LDEORLX:  in atomicReadDroppedOnZero()
91     case AArch64::LDSETB:     case AArch64::LDSETH:  in atomicReadDroppedOnZero()
92     case AArch64::LDSETW:     case AArch64::LDSETX:  in atomicReadDroppedOnZero()
93     case AArch64::LDSETLB:    case AArch64::LDSETLH:  in atomicReadDroppedOnZero()
94     case AArch64::LDSETLW:    case AArch64::LDSETLX:  in atomicReadDroppedOnZero()
95     case AArch64::LDSMAXB:    case AArch64::LDSMAXH:  in atomicReadDroppedOnZero()
96     case AArch64::LDSMAXW:    case AArch64::LDSMAXX:  in atomicReadDroppedOnZero()
97     case AArch64::LDSMAXLB:   case AArch64::LDSMAXLH:  in atomicReadDroppedOnZero()
98     case AArch64::LDSMAXLW:   case AArch64::LDSMAXLX:  in atomicReadDroppedOnZero()
99     case AArch64::LDSMINB:    case AArch64::LDSMINH:  in atomicReadDroppedOnZero()
100     case AArch64::LDSMINW:    case AArch64::LDSMINX:  in atomicReadDroppedOnZero()
101     case AArch64::LDSMINLB:   case AArch64::LDSMINLH:  in atomicReadDroppedOnZero()
102     case AArch64::LDSMINLW:   case AArch64::LDSMINLX:  in atomicReadDroppedOnZero()
103     case AArch64::LDUMAXB:    case AArch64::LDUMAXH:  in atomicReadDroppedOnZero()
104     case AArch64::LDUMAXW:    case AArch64::LDUMAXX:  in atomicReadDroppedOnZero()
105     case AArch64::LDUMAXLB:   case AArch64::LDUMAXLH:  in atomicReadDroppedOnZero()
106     case AArch64::LDUMAXLW:   case AArch64::LDUMAXLX:  in atomicReadDroppedOnZero()
107     case AArch64::LDUMINB:    case AArch64::LDUMINH:  in atomicReadDroppedOnZero()
108     case AArch64::LDUMINW:    case AArch64::LDUMINX:  in atomicReadDroppedOnZero()
109     case AArch64::LDUMINLB:   case AArch64::LDUMINLH:  in atomicReadDroppedOnZero()
110     case AArch64::LDUMINLW:   case AArch64::LDUMINLX:  in atomicReadDroppedOnZero()
111     case AArch64::SWPB:       case AArch64::SWPH:  in atomicReadDroppedOnZero()
112     case AArch64::SWPW:       case AArch64::SWPX:  in atomicReadDroppedOnZero()
113     case AArch64::SWPLB:      case AArch64::SWPLH:  in atomicReadDroppedOnZero()
114     case AArch64::SWPLW:      case AArch64::SWPLX:  in atomicReadDroppedOnZero()
131     if (MI.definesRegister(AArch64::XZR, /*TRI=*/nullptr) ||  in processMachineBasicBlock()
132         MI.definesRegister(AArch64::WZR, /*TRI=*/nullptr)) {  in processMachineBasicBlock()
169       } else if (RC->contains(AArch64::WZR))  in processMachineBasicBlock()
170         NewReg = AArch64::WZR;  in processMachineBasicBlock()
171       else if (RC->contains(AArch64::XZR))  in processMachineBasicBlock()
172         NewReg = AArch64::XZR;  in processMachineBasicBlock()