Test safe506

PPC safe506
"SyncsWW Rfe DpdR Fri Rfe SyncdRR Fre"
Cycle=SyncsWW Rfe DpdR Fri Rfe SyncdRR Fre
Relax=
Safe=Fri Fre DpdR ACSyncdRR BCSyncsWW
{
0:r2=y; 0:r5=x;
1:r2=x; 1:r4=y;
2:r2=y;
}
 P0            | P1           | P2           ;
 lwz r1,0(r2)  | lwz r1,0(r2) | li r1,1      ;
 xor r3,r1,r1  | sync         | stw r1,0(r2) ;
 lwzx r4,r3,r5 | lwz r3,0(r4) | sync         ;
 li r6,1       |              | li r3,2      ;
 stw r6,0(r5)  |              | stw r3,0(r2) ;
exists
(y=2 /\ 0:r1=2 /\ 0:r4=0 /\ 1:r1=1 /\ 1:r3=0)