Test C11-C2

AArch64 C11-C2
"Same idea as C11-C, with S"
{
0:X1=x;
1:X1=x; 1:X3=y;
2:X1=y; 2:X3=x;
}
P0           | P1           | P2           ;
MOV W0,#3    | MOV W0,#2    | LDAR W0,[X1] ;
STR W0,[X1]  | STR W0,[X1]  | MOV W2,#1    ;
             | MOV W2,#1    | STR W2,[X3]  ;
             | STLR W2,[X3] | LDR W4,[X3]  ;
exists
(x=2 /\ 2:X0=1 /\ 2:X4=3)