Test WWC+lwsync+addr

PPC WWC+lwsync+addr
"WWC+lwsync+addr"
Orig=Wse Rfe LwSyncdRW Rfe DpAddrdW
{
0:r2=x;
1:r2=x; 1:r4=y;
2:r2=y; 2:r5=x;
}
 P0           | P1           | P2            ;
 li r1,2      | lwz r1,0(r2) | lwz r1,0(r2)  ;
 stw r1,0(r2) | lwsync       | xor r3,r1,r1  ;
              | li r3,1      | li r6,1       ;
              | stw r3,0(r4) | stwx r6,r3,r5  ;
~exists
(1:r1=2 /\ 2:r1=1 /\ x=2)