Test R02

PPC R02
"PodRW Wse PodWR Fre Rfe"
(* Allowed by PLDI, Forbiden by CAV *)
{0:r2=y; 0:r4=x; 1:r2=x; 1:r4=y; 2:r2=y;}

 P0           | P1           | P2           ;
 lwz r1,0(r2) | li r1,2      | li r1,1      ;
 lwsync       | stw r1,0(r2) | stw r1,0(r2) ;
 li r3,1      | sync         |              ;
 stw r3,0(r4) | lwz r3,0(r4) |              ;
Observed
    0:r1=1; 1:r3=0; x=2;