Test WRR+2W+po+ponaa+WB+WC

X86_64 WRR+2W+po+ponaa+WB+WC
"Rfe PodRR Fre PodWWNaA CoeANa"
MT=x:WB y:WC
Generator=diyone7 (version 7.56+02~dev)
Prefetch=1:x=F,1:y=T,2:y=F,2:x=W
Com=Rf Fr Co
Orig=Rfe PodRR Fre PodWWNaA CoeANa
Align=
{
}
 P0          | P1            | P2             ;
 movl $2,(x) | movl (x),%eax | movl $1,(y)    ;
             | movl (y),%ebx | movl $1,%eax   ;
             |               | xchgl (x),%eax ;
exists (x=2 /\ 1:rax=2 /\ 1:rbx=0 /\ 2:rax=0)