Test R+popxs+SYS2

AArch64 R+popxs+SYS2
"PodWWPX WseXP PodWRPX FreXP"
Cycle=PodWWPX WseXP PodWRPX FreXP
Relax=FreXP WseXP
Safe=PodWW PodWR
Prefetch=0:x=F,0:y=W,1:y=F,1:x=T
Com=Ws Fr
Orig=PodWWPX WseXP PodWRPX FreXP
{
0:X1=x; 0:X2=y;
1:X1=y; 1:X2=x;
}
 P0              | P1              ;
 MOV W0,#1       | MOV W0,#2       ;
 STR W0,[X1]     | STR W0,[X1]     ;
 MOV W3,#1       | LDXR W3,[X2]    ;
 LDXR W4,[X2]    | STXR W4,W3,[X2] ;
 STXR W5,W3,[X2] |                 ;
exists
(x=1 /\ y=2 /\ 0:X5=0 /\ 0:X4=0 /\ 1:X4=0 /\ 1:X3=0)