Test ppoa-v4

PPC ppoa-v4.litmus
"Fre Rfe SyncdRW Rfe CtrldW PosWR DpdR"
Cycle=Fre Rfe SyncdRW Rfe CtrldW PosWR DpdR
Relax=
Safe=Fre [Rfe,SyncdRW,Rfe] [CtrldW,PosWR,DpdR]
{
0:r2=z; 0:r4=x;
1:r2=x; 1:r4=y; 1:r8=z;
2:r2=z;
}
 P0           | P1            | P2           ;
 lwz r1,0(r2) | lwz r1,0(r2)  | li r1,1      ;
 sync         | cmpw r1,r1    | stw r1,0(r2) ;
 li r3,1      | beq  LC00     |              ;
 stw r3,0(r4) | LC00:         |              ;
              | li r3,1       |              ;
              | stw r3,0(r4)  |              ;
              | lwz r5,0(r4)  |              ;
              | xor r6,r5,r5  |              ;
              | lwzx r7,r6,r8 |              ;
exists
(0:r1=1 /\ 1:r1=1 /\ 1:r5=1 /\ 1:r7=0)