Test MP+rel+cas-addr

AArch64 MP+rel+cas-addr
{
int z=1;
0:X0=x; 0:X2=y;
1:X0=x; 1:X2=y; 1:X4=z;
}

P0           | P1                  ;
MOV W1,#1    | LDR W1,[X2]         ;
             | MOV W9,W1           ;
STR W1,[X0]  | CAS W1,W3,[X4]      ;
MOV W3,#1    | AND W5,W1,#2        ;
STLR W3,[X2] | LDR W7,[X0,W5,SXTW] ;

Observed
    1:X9=1; 1:X7=0;