Test IRRWIW+poacquireonce+fencembonceonce+ReleaseOnce

LISA IRRWIW+poacquireonce+fencembonceonce+ReleaseOnce
"RfeReleaseAcquire PodRRAcquireOnce FreOnceOnce RfeOnceOnce FenceMbdRWOnceOnce WseOnceRelease"
Cycle=PodRRAcquireOnce FreOnceOnce RfeOnceOnce FenceMbdRWOnceOnce WseOnceRelease RfeReleaseAcquire
Relax=WseOnceRelease RfeReleaseAcquire
Safe=PodRRAcquireOnce RfeOnceOnce FreOnceOnce FenceMbdRWOnceOnce
Prefetch=1:x=F,1:y=T,3:y=F,3:x=W
Com=Rf Fr Rf Ws
Orig=RfeReleaseAcquire PodRRAcquireOnce FreOnceOnce RfeOnceOnce FenceMbdRWOnceOnce WseOnceRelease
{
}
 P0             | P1              | P2          | P3           ;
 w[release] x 2 | r[acquire] r0 x | w[once] y 1 | r[once] r0 y ;
                | r[once] r1 y    |             | f[mb]        ;
                |                 |             | w[once] x 1  ;
Observed
    x=2; 3:r0=1; 1:r1=0; 1:r0=2;