Test R+poxp+po+SYS2

AArch64 R+poxp+po+SYS2
"PodWWXP Wse PodWR FrePX"
Cycle=Wse PodWR FrePX PodWWXP
Relax=FrePX
Safe=Wse PodWW PodWR
Prefetch=0:x=F,0:y=W,1:y=F,1:x=T
Com=Ws Fr
Orig=PodWWXP Wse PodWR FrePX
{
0:X0=x; 0:X5=y;
1:X1=y; 1:X3=x;
}
 P0              | P1          ;
 MOV W1,#1       | MOV W0,#2   ;
 LDXR W2,[X0]    | STR W0,[X1] ;
 STXR W3,W1,[X0] | LDR W2,[X3] ;
 MOV W4,#1       |             ;
 STR W4,[X5]     |             ;
exists
(x=1 /\ y=2 /\ 0:X3=0 /\ 0:X2=0 /\ 1:X2=0)