Test R+clflushoptnext+mfence+WB+WC

X86_64 R+clflushoptnext+mfence+WB+WC
"ClFlushOptNextdWW Coe MFencedWR Fre"
MT=x:WB y:WC
Generator=diyone7 (version 7.56+02~dev)
Prefetch=0:x=F,0:y=W,1:y=F,1:x=T
Com=Co Fr
Orig=ClFlushOptNextdWW Coe MFencedWR Fre
Align=
{
}
 P0             | P1            ;
 movl $1,(x)    | movl $2,(y)   ;
 clflushopt (y) | mfence        ;
 movl $1,(y)    | movl (x),%eax ;
exists (1:rax=0 /\ [y]=2)