Test WWC+po+lwsync

PPC WWC+po+lwsync
"Rfe PodRW Rfe LwSyncdRW Wse"
Cycle=Rfe PodRW Rfe LwSyncdRW Wse
{
0:r2=x;
1:r2=x; 1:r4=y;
2:r2=y; 2:r4=x;
}
 P0           | P1           | P2           ;
 li r1,2      | lwz r1,0(r2) | lwz r1,0(r2) ;
 stw r1,0(r2) | li r3,1      | lwsync       ;
              | stw r3,0(r4) | li r3,1      ;
              |              | stw r3,0(r4) ;
exists
(x=2 /\ 1:r1=2 /\ 2:r1=1)