Test WRW+WR+po+sfence+WB+WC

X86_64 WRW+WR+po+sfence+WB+WC
"Rfe PodRW Coe SFencedWR Fre"
MT=x:WB y:WC
Generator=diyone7 (version 7.56+02~dev)
Prefetch=1:x=F,1:y=W,2:y=F,2:x=T
Com=Rf Co Fr
Orig=Rfe PodRW Coe SFencedWR Fre
Align=
{
}
 P0          | P1            | P2            ;
 movl $1,(x) | movl (x),%eax | movl $2,(y)   ;
             | movl $1,(y)   | sfence        ;
             |               | movl (x),%eax ;
exists (1:rax=1 /\ 2:rax=0 /\ [y]=2)