Test LB+addr+wsi+data

PPC LB+addr+wsi+data
"DpAddrdW Wsi Rfe DpDatadW Rfe"
Prefetch=
Com=Rf Rf
Orig=DpAddrdW Wsi Rfe DpDatadW Rfe
{
0:r2=x; 0:r5=y;
1:r2=y; 1:r4=x;
}
 P0            | P1           ;
 lwz r1,0(r2)  | lwz r1,0(r2) ;
 xor r3,r1,r1  | xor r3,r1,r1 ;
 li r4,1       | addi r3,r3,1 ;
 stwx r4,r3,r5 | stw r3,0(r4) ;
 li r6,2       |              ;
 stw r6,0(r5)  |              ;
exists
(y=2 /\ 0:r1=1 /\ 1:r1=2)