Test SIMPLE2+X

AArch64 SIMPLE2+X
"+"

{0:X0=x; 1:X0=x;}

 P0              | P1              ;
 MOV W3,#1       | MOV W3,#2       ;
 LDXR W1,[X0]    | LDXR W1,[X0]    ;
 STXR W2,W3,[X0] | STXR W2,W3,[X0] ;

locations [x; 0:X2; 1:X2;]