983   VIXL_CHECK(Operand(x0).IsPlainRegister());  in TEST()
984   VIXL_CHECK(Operand(x1, LSL, 0).IsPlainRegister());  in TEST()
985   VIXL_CHECK(Operand(x2, LSR, 0).IsPlainRegister());  in TEST()
986   VIXL_CHECK(Operand(x3, ASR, 0).IsPlainRegister());  in TEST()
987   VIXL_CHECK(Operand(x4, ROR, 0).IsPlainRegister());  in TEST()
988   VIXL_CHECK(Operand(x5, UXTX).IsPlainRegister());  in TEST()
989   VIXL_CHECK(Operand(x6, SXTX).IsPlainRegister());  in TEST()
990   VIXL_CHECK(Operand(w7).IsPlainRegister());  in TEST()
991   VIXL_CHECK(Operand(w8, LSL, 0).IsPlainRegister());  in TEST()
992   VIXL_CHECK(Operand(w9, LSR, 0).IsPlainRegister());  in TEST()
993   VIXL_CHECK(Operand(w10, ASR, 0).IsPlainRegister());  in TEST()
994   VIXL_CHECK(Operand(w11, ROR, 0).IsPlainRegister());  in TEST()
996   VIXL_CHECK(!Operand(x0, LSL, 1).IsPlainRegister());  in TEST()
997   VIXL_CHECK(!Operand(x1, LSR, 2).IsPlainRegister());  in TEST()
998   VIXL_CHECK(!Operand(x2, ASR, 3).IsPlainRegister());  in TEST()
999   VIXL_CHECK(!Operand(x3, ROR, 4).IsPlainRegister());  in TEST()
1000   VIXL_CHECK(!Operand(x5, UXTX, 1).IsPlainRegister());  in TEST()
1001   VIXL_CHECK(!Operand(x6, SXTX, 2).IsPlainRegister());  in TEST()
1002   VIXL_CHECK(!Operand(w7, LSL, 1).IsPlainRegister());  in TEST()
1003   VIXL_CHECK(!Operand(w8, LSR, 2).IsPlainRegister());  in TEST()
1004   VIXL_CHECK(!Operand(w9, ASR, 3).IsPlainRegister());  in TEST()
1005   VIXL_CHECK(!Operand(w10, ROR, 4).IsPlainRegister());  in TEST()
1006   VIXL_CHECK(!Operand(w11, UXTB).IsPlainRegister());  in TEST()
1007   VIXL_CHECK(!Operand(w12, SXTB).IsPlainRegister());  in TEST()
1008   VIXL_CHECK(!Operand(w13, UXTH).IsPlainRegister());  in TEST()
1009   VIXL_CHECK(!Operand(w14, SXTH).IsPlainRegister());  in TEST()
1012   VIXL_CHECK(!Operand(w15, UXTW).IsPlainRegister());  in TEST()
1013   VIXL_CHECK(!Operand(w16, SXTW).IsPlainRegister());  in TEST()
1018   VIXL_CHECK(MemOperand(x0).IsPlainRegister());  in TEST()
1019   VIXL_CHECK(MemOperand(sp).IsPlainRegister());  in TEST()
1020   VIXL_CHECK(MemOperand(x1, 0).IsPlainRegister());  in TEST()
1022   VIXL_CHECK(!MemOperand(x2, xzr).IsPlainRegister());  in TEST()
1023   VIXL_CHECK(!MemOperand(x3, xzr, SXTX).IsPlainRegister());  in TEST()
1024   VIXL_CHECK(!MemOperand(x4, xzr, SXTX, 2).IsPlainRegister());  in TEST()
1025   VIXL_CHECK(!MemOperand(x5, wzr, UXTW).IsPlainRegister());  in TEST()
1026   VIXL_CHECK(!MemOperand(x6, wzr, UXTW, 3).IsPlainRegister());  in TEST()
1028   VIXL_CHECK(!MemOperand(x7, 0, PostIndex).IsPlainRegister());  in TEST()
1029   VIXL_CHECK(!MemOperand(x8, 0, PreIndex).IsPlainRegister());  in TEST()
1030   VIXL_CHECK(!MemOperand(x9, xzr, PostIndex).IsPlainRegister());  in TEST()
1032   VIXL_CHECK(!MemOperand(x20, 1).IsPlainRegister());  in TEST()
1033   VIXL_CHECK(!MemOperand(x21, x30).IsPlainRegister());  in TEST()