Test safe440

PPC safe440
"LwSyncdWW Rfe SyncsRW Rfe SyncdRR Fre SyncsWR Fre"
Cycle=LwSyncdWW Rfe SyncsRW Rfe SyncdRR Fre SyncsWR Fre
Relax=
Safe=Fre SyncsWR LwSyncdWW ACSyncsRW ACSyncdRR
{
0:r2=x;
1:r2=x; 1:r4=y;
2:r2=y;
3:r2=y; 3:r4=x;
}
 P0           | P1           | P2           | P3           ;
 lwz r1,0(r2) | lwz r1,0(r2) | li r1,1      | li r1,2      ;
 sync         | sync         | stw r1,0(r2) | stw r1,0(r2) ;
 li r3,2      | lwz r3,0(r4) | sync         | lwsync       ;
 stw r3,0(r2) |              | lwz r3,0(r2) | li r3,1      ;
              |              |              | stw r3,0(r4) ;
Observed
    0:r1=0; 1:r1=2; 1:r3=0; 2:r3=1; x=2; y=1;
and 0:r1=0; 1:r1=2; 1:r3=0; 2:r3=1; x=2; y=2;
and 0:r1=0; 1:r1=2; 1:r3=1; 2:r3=1; x=2; y=2;
and 0:r1=0; 1:r1=2; 1:r3=0; 2:r3=2; x=2; y=2;
and 0:r1=0; 1:r1=2; 1:r3=1; 2:r3=2; x=2; y=2;