Test R+eieio+sync

PPC R+eieio+sync
"EieiodWW Wse SyncdWR Fre"
Cycle=Fre EieiodWW Wse SyncdWR
{
0:r2=x; 0:r4=y;
1:r2=y; 1:r4=x;
}
 P0           | P1           ;
 li r1,1      | li r1,2      ;
 stw r1,0(r2) | stw r1,0(r2) ;
 eieio        | sync         ;
 li r3,1      | lwz r3,0(r4) ;
 stw r3,0(r4) |              ;
Observed
    1:r3=0; y=2;