Test LB+addr+isync

PPC LB+addr+isync
"DpAddrdW Rfe ISyncdRW Rfe"
Cycle=Rfe ISyncdRW Rfe DpAddrdW
Prefetch=
Com=Rf Rf
Orig=DpAddrdW Rfe ISyncdRW 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  | isync        ;
 li r4,1       | li r3,1      ;
 stwx r4,r3,r5 | stw r3,0(r4) ;
exists
(0:r1=1 /\ 1:r1=1)