Test safe488

PPC safe488
"Rfe SyncdRR Fre LwSyncdWW Rfe SyncsRR Fre"
Cycle=Rfe SyncdRR Fre LwSyncdWW Rfe SyncsRR Fre
Relax=
Safe=Fre LwSyncdWW ACSyncsRR ACSyncdRR
{
0:r2=y; 0:r4=x;
1:r2=x; 1:r4=y;
2:r2=y;
3:r2=y;
}
 P0           | P1           | P2           | P3           ;
 lwz r1,0(r2) | li r1,1      | lwz r1,0(r2) | li r1,2      ;
 sync         | stw r1,0(r2) | sync         | stw r1,0(r2) ;
 lwz r3,0(r4) | lwsync       | lwz r3,0(r2) |              ;
              | li r3,1      |              |              ;
              | stw r3,0(r4) |              |              ;
Observed
    0:r1=2; 0:r3=0; 2:r1=0; 2:r3=0; y=2;
and 0:r1=2; 0:r3=0; 2:r1=0; 2:r3=1; y=2;
and 0:r1=2; 0:r3=0; 2:r1=0; 2:r3=2; y=2;
and 0:r1=2; 0:r3=0; 2:r1=1; 2:r3=2; y=2;
and 0:r1=2; 0:r3=0; 2:r1=2; 2:r3=2; y=2;