Test c2

PPC c2 (BasicCTwo)
"Simple sync test, store-sync-load|store-sync-load"
{
 0:r6=1; 0:r4=x; 0:r5=y;
 1:r6=1; 1:r4=x; 1:r5=y;
}

P0              | P1               ;
 stw r6,0,r4    | stw r6,0,r5      ;
 sync           | sync             ;
 lwz r2,0,r5    | lwz r2,0,r4      ;


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