Test LB+syncrp+po

PPC LB+syncrp+po
"SyncdRWRP Rfe PodRW RfePR"
Cycle=Rfe PodRW RfePR SyncdRWRP
Prefetch=
Com=Rf Rf
Orig=SyncdRWRP Rfe PodRW RfePR
{
0:r2=x; 0:r4=y;
1:r2=y; 1:r4=x;
}
 P0             | P1           ;
 lwarx r1,r0,r2 | lwz r1,0(r2) ;
 sync           | li r3,1      ;
 li r3,1        | stw r3,0(r4) ;
 stw r3,0(r4)   |              ;
exists
(0:r1=1 /\ 1:r1=1)