Test 2+2W+mfence+clflushoptnext+WC+WB

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