Test safe066

PPC safe066
"SyncdWW Rfe SyncdRW Rfe DpdR Fre SyncdWW Wse"
Cycle=SyncdWW Rfe SyncdRW Rfe DpdR Fre SyncdWW Wse
Relax=
Safe=Fre Wse SyncdWW DpdR BCSyncdWW BCSyncdRW
{
0:r2=x; 0:r4=y;
1:r2=y; 1:r5=z;
2:r2=z; 2:r4=a;
3:r2=a; 3:r4=x;
}
 P0           | P1            | P2           | P3           ;
 lwz r1,0(r2) | lwz r1,0(r2)  | li r1,1      | li r1,2      ;
 sync         | xor r3,r1,r1  | stw r1,0(r2) | stw r1,0(r2) ;
 li r3,1      | lwzx r4,r3,r5 | sync         | sync         ;
 stw r3,0(r4) |               | li r3,1      | li r3,1      ;
              |               | stw r3,0(r4) | stw r3,0(r4) ;
exists
(a=2 /\ 0:r1=1 /\ 1:r1=1 /\ 1:r4=0)