Test RWC+poacquireonce+fencembonceonce+Once

LISA RWC+poacquireonce+fencembonceonce+Once
"RfeOnceAcquire PodRRAcquireOnce FreOnceOnce FenceMbdWROnceOnce FreOnceOnce"
Cycle=PodRRAcquireOnce FreOnceOnce FenceMbdWROnceOnce FreOnceOnce RfeOnceAcquire
Relax=RfeOnceAcquire
Safe=PodRRAcquireOnce FreOnceOnce FenceMbdWROnceOnce
Prefetch=1:x=F,1:y=T,2:y=F,2:x=T
Com=Rf Fr Fr
Orig=RfeOnceAcquire PodRRAcquireOnce FreOnceOnce FenceMbdWROnceOnce FreOnceOnce
{
}
 P0          | P1              | P2           ;
 w[once] x 1 | r[acquire] r0 x | w[once] y 1  ;
             | r[once] r1 y    | f[mb]        ;
             |                 | r[once] r0 x ;
Observed
    2:r0=0; 1:r1=0; 1:r0=1;