Test safe001

PPC safe001
"SyncdWR Fre SyncsWW Rfe DpdW Wse"
Cycle=SyncdWR Fre SyncsWW Rfe DpdW Wse
Relax=
Safe=Fre Wse SyncdWR DpdW BCSyncsWW
{
0:r2=x;
1:r2=x; 1:r5=y;
2:r2=y; 2:r4=x;
}
 P0           | P1            | P2           ;
 li r1,1      | lwz r1,0(r2)  | li r1,2      ;
 stw r1,0(r2) | xor r3,r1,r1  | stw r1,0(r2) ;
 sync         | li r4,1       | sync         ;
 li r3,2      | stwx r4,r3,r5 | lwz r3,0(r4) ;
 stw r3,0(r2) |               |              ;
Observed
    1:r1=1; 2:r3=0; x=2; y=2;