Test SC-DEP-CTRL

AArch64 SC-DEP-CTRL
(* Control dependency from Store Conditional *)
{ 
0:X0=x; 0:X5=y;
1:X1=y; 1:X3=x;
}
 P0              | P1          ;
 MOV W1,#1       | LDR W0,[X1] ;
 LDXR W2,[X0]    | DMB LD      ;
 STXR W3,W1,[X0] | LDR W2,[X3] ;
 CBNZ W3,Fail0   |             ;
 MOV W4,#1       |             ;
 STR W4,[X5]     |             ;
 Fail0:          |             ;
exists
(x=1 /\ 1:X0=1 /\ 1:X2=0)