// CHECK: fsubp
// CHECK: encoding: [0xde,0xe1]
fsubp %st,%st(1)
+
+// PR9164
+// CHECK: fsubp %st(2)
+// CHECK: encoding: [0xde,0xe2]
+fsubp %st, %st(2)
+
+// PR10345
+// CHECK: xchgl %eax, %eax
+// CHECK: encoding: [0x90]
+xchgl %eax, %eax
+
+// CHECK: xchgw %ax, %ax
+// CHECK: encoding: [0x66,0x90]
+xchgw %ax, %ax
+
+// CHECK: xchgl %ecx, %eax
+// CHECK: encoding: [0x91]
+xchgl %ecx, %eax
+
+// CHECK: xchgl %ecx, %eax
+// CHECK: encoding: [0x91]
+xchgl %eax, %ecx