Test rfe004

PPC rfe004
"DpdW Wse Rfe DpdW Wse Rfe"
Cycle=DpdW Wse Rfe DpdW Wse Rfe
Relax=Rfe
Safe=Wse DpdW
{
0:r2=x; 0:r5=y;
1:r2=y;
2:r2=y; 2:r5=x;
3:r2=x;
}
 P0            | P1           | P2            | P3           ;
 lwz r1,0(r2)  | li r1,2      | lwz r1,0(r2)  | li r1,2      ;
 xor r3,r1,r1  | stw r1,0(r2) | xor r3,r1,r1  | stw r1,0(r2) ;
 li r4,1       |              | li r4,1       |              ;
 stwx r4,r3,r5 |              | stwx r4,r3,r5 |              ;
exists
(x=2 /\ y=2 /\ 0:r1=2 /\ 2:r1=2)