Test NT-33-dsb

AArch64 NT-33-dsb
TTHM=P1:HA
Variant=precise
{
int x=1; int y; int z=2;
pte_x=(af:0);
0:X2=y;
0:X6=pte_x;
0:X9=(oa:phy_z,af:0);
1:X2=y; 1:X4=x;
}
  P0           | P1           ;
LDR X7,[X6]    | LDR W0,[X2]  ;
STR X9,[X6]    | DMB LD       ;
LDR X5,[X6]    |L0:           ;
DSB SY         | LDR W1,[X4]  ;
MOV W0,#1      |              ;
STR W0,[X2]    |              ;
exists (0:X7=(oa:PA(x)) /\ 1:X0=1 /\ 1:X1=2)