Test S+dmb.sy+indr

AArch64 S+dmb.sy+indr
"based on: DMB.SYdWW Rfe DpCtrldW Wse"
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X3=x;
}
 P0          | P1           ;
 MOV W0,#2   | LDR W0,[X1]  ;
 STR W0,[X1] | EOR X4,X0,X0 ;
 DMB SY      | ADR X5,LC00  ;
 MOV W2,#1   | ADD X6,X5,X4 ;
 STR W2,[X3] | br00: BR X6  ;
             | LC00:        ;
             | MOV W2,#1    ;
             | STR W2,[X3]  ;
Observed
    x=2; 1:X0=1;