Test bb

PPC bb (BasicEleven)
"Double sync test"
{
 0:r6=1;
 0:r4=x; 0:r5=y;
 1:r4=x; 1:r5=y;
 2:r4=x; 2:r5=y;
}
P0               | P1                | P2 ;
 stw r6,0(r4)    | lwz r1,0(r5)      | lwz r1,0(r5) ;
 stw r6,0(r5)    | lwz r2,0(r4)      | lwz r2,0(r4) ;


exists ((1:r1=1 /\ 1:r2=0) \/  (2:r1=1 /\ 2:r2=0))