Test LB+sync+ctrl-detrw

PPC LB+sync+ctrl-detrw
"SyncdRW Rfe DpCtrldR DetourRW Rfe"
Cycle=Rfe SyncdRW Rfe DpCtrldR DetourRW
Prefetch=0:x=F,0:y=W,1:y=F,1:x=W
Com=Rf Rf
Orig=SyncdRW Rfe DpCtrldR DetourRW Rfe
{
0:r2=x; 0:r4=y;
1:r2=y; 1:r4=x;
2:r2=x;
}
 P0           | P1           | P2           ;
 lwz r1,0(r2) | lwz r1,0(r2) | li r1,1      ;
 sync         | cmpw r1,r1   | stw r1,0(r2) ;
 li r3,1      | beq  LC00    |              ;
 stw r3,0(r4) | LC00:        |              ;
              | lwz r3,0(r4) |              ;
              | li r5,2      |              ;
              | stw r5,0(r4) |              ;
exists
(x=2 /\ 0:r1=2 /\ 1:r1=1 /\ 1:r3=0)