Test LB+lwsyncpa+po

PPC LB+lwsyncpa+po
"LwSyncdRWPA RfeAP PodRW Rfe"
Cycle=RfeAP PodRW Rfe LwSyncdRWPA
Prefetch=
Com=Rf Rf
Orig=LwSyncdRWPA RfeAP PodRW Rfe
{ ok=1;
0:r2=x; 0:r4=y; 0:r6=ok;
1:r2=y; 1:r4=x;
}
 P0               | P1           ;
 lwz r1,0(r2)     | lwz r1,0(r2) ;
 lwsync           | li r3,1      ;
 li r3,1          | stw r3,0(r4) ;
 lwarx %sta,r0,r4 |              ;
 stwcx. r3,r0,r4  |              ;
 bne  Fail0       |              ;
 b   Exit0        |              ;
 Fail0:           |              ;
 li r5,0          |              ;
 stw r5,0(r6)     |              ;
 Exit0:           |              ;
exists
(ok=1 /\ 0:r1=1 /\ 1:r1=1)