Test NT-12-dsbld-allha+dsb

AArch64 NT-12-dsbld-allha+dsb
TTHM=HA
Variant=precise
{
pte_x=(af:0);
x=1;
0:X0=x; 0:X4=y;
1:X0=y; 1:X2=pte_x;
}
 P0          | P1          ;
 LDR W1,[X0] | LDR W1,[X0] ;
 DSB LD      | DSB SY      ;
 MOV W3,#1   | LDR X3,[X2] ;
 STR W3,[X4] |             ;
exists (1:X1=1 /\ 1:X3=(oa:PA(x), af:0))