Test 2+2W+dmb.sy+po

AArch64 2+2W+dmb.sy+po
"DMB.SYdWW Wse PodWW Wse"
Cycle=Wse PodWW Wse DMB.SYdWW
Relax=
Safe=Wse PodWW DMB.SYdWW
Prefetch=0:x=F,0:y=W,1:y=F,1:x=W
Com=Ws Ws
Orig=DMB.SYdWW Wse PodWW Wse
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X3=x;
}
 P0          | P1          ;
 MOV W0,#2   | MOV W0,#2   ;
 STR W0,[X1] | STR W0,[X1] ;
 DMB SY      | MOV W2,#1   ;
 MOV W2,#1   | STR W2,[X3] ;
 STR W2,[X3] |             ;
exists
(x=2 /\ y=2)