Test R+clflushoptnextntna+mfence+WB+WB

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