Test MP+poss

AArch64 MP+poss
"PosWW Rfe PosRR Fre"
Cycle=Rfe PosRR Fre PosWW
Relax=
Safe=Rfe Fre PosWW PosRR
Prefetch=
Com=Rf Fr
Orig=PosWW Rfe PosRR Fre
{
0:X1=x;
1:X1=x;
}
 P0          | P1          ;
 MOV W0,#1   | LDR W0,[X1] ;
 STR W0,[X1] | LDR W2,[X1] ;
 MOV W2,#2   |             ;
 STR W2,[X1] |             ;
Observed
    x=2; 1:X2=0; 1:X0=2;