Test 3W+OBS

Executions for behaviour: "0:r1=1 ; 0:r2=2 ; 0:r3=3"

PPC 3W+OBS
{
1:r2=x; 2:r2=x; 3:r2=x; 0:r9=x;
}
 P0          | P1           | P2           | P3           ;
lwz r1,0(r9) | li r1,1      | li r1,2      | li r1,3      ;
lwz r2,0(r9) | stw r1,0(r2) | stw r1,0(r2) | stw r1,0(r2) ;
lwz r3,0(r9) |              |              |              ;
exists (0:r1=1 /\ 0:r2=2 /\ 0:r3=3)