Test WRR+2W+po+sfence+WC+WC

X86_64 WRR+2W+po+sfence+WC+WC
"Rfe PodRR Fre SFencedWW Coe"
MT=x:WC 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 SFencedWW Coe
Align=
{
}
 P0          | P1            | P2          ;
 movl $2,(x) | movl (x),%eax | movl $1,(y) ;
             | movl (y),%ebx | sfence      ;
             |               | movl $1,(x) ;
exists (x=2 /\ 1:rax=2 /\ 1:rbx=0)