Test NT-30-dmb+dsb2

AArch64 NT-30-dmb+dsb2
TTHM=P1:HA
{
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           ;
SWP X9,X7,[X6] | LDR W0,[X2]  ;
LDR X5,[X6]    | DSB SY       ;
DMB SY         |L0:           ;
MOV W0,#1      | LDR W1,[X4]  ;
STR W0,[X2]    |              ;
exists (0:X7=(oa:PA(x)) /\ 1:X0=1 /\ 1:X1=1) \/ (0:X7=(oa:PA(x)) /\ 1:X0=1 /\ 1:X1=2)