Test safe341

PPC safe341
"SyncsWR Fre SyncdWW Rfe SyncdRW Rfe DpdR Fre"
Cycle=SyncsWR Fre SyncdWW Rfe SyncdRW Rfe DpdR Fre
Relax=
Safe=Fre SyncsWR DpdR BCSyncdWW BCSyncdRW
{
0:r2=z; 0:r4=x;
1:r2=x; 1:r4=y;
2:r2=y; 2:r5=z;
3:r2=z;
}
 P0           | P1           | P2            | P3           ;
 li r1,2      | lwz r1,0(r2) | lwz r1,0(r2)  | li r1,1      ;
 stw r1,0(r2) | sync         | xor r3,r1,r1  | stw r1,0(r2) ;
 sync         | li r3,1      | lwzx r4,r3,r5 | sync         ;
 li r3,1      | stw r3,0(r4) |               | lwz r3,0(r2) ;
 stw r3,0(r4) |              |               |              ;
exists
(z=2 /\ 1:r1=1 /\ 2:r1=1 /\ 2:r4=0 /\ 3:r3=1)