Test SpecCoiX

AArch64 SpecCoiX
Com=Rf Rf
{
0:X1=x; 0:X3=y;
1:X1=y; 1:X3=x;
}
 P0          | P1           ;
 LDR W0,[X1] | LDR W0,[X1]  ;
 DMB SY      | MOV W2,#2    ;
 MOV W2,#1   | STR W2,[X3]  ;
             | CBNZ W0,LC00 ;
             | LDR W2,[X3]  ;
             |LC00:         ;
             | MOV W4,#1    ;
 STR W2,[X3] | STR W4,[X3]  ;

Observed
    1:X0=1; 0:X0=2;