Test S+rfi-addr+sync

PPC S+rfi-addr+sync
"Rfi DpAddrdW Rfe SyncdRW Wse"
Prefetch=0:x=F,1:x=W
Com=Rf Ws
Orig=Rfi DpAddrdW Rfe SyncdRW Wse
{
0:r2=x; 0:r6=y;
1:r2=y; 1:r4=x;
}
 P0            | P1           ;
 li r1,2       | lwz r1,0(r2) ;
 stw r1,0(r2)  | sync         ;
 lwz r3,0(r2)  | li r3,1      ;
 xor r4,r3,r3  | stw r3,0(r4) ;
 li r5,1       |              ;
 stwx r5,r4,r6 |              ;
exists
(x=2 /\ 0:r3=2 /\ 1:r1=1)