Test S+pontna+mfence+UC+WB

X86_64 S+pontna+mfence+UC+WB
"PodWWNTNa Rfe MFencedRW CoeNaNT"
MT=x:UC y:WB
Generator=diyone7 (version 7.56+02~dev)
Prefetch=0:x=F,0:y=W,1:y=F,1:x=W
Com=Rf Co
Orig=PodWWNTNa Rfe MFencedRW CoeNaNT
Align=
{
0:rax=x;
}
 P0                  | P1            ;
 movl $2,%ebx        | movl (y),%eax ;
 movntil %ebx,(%rax) | mfence        ;
 movl $1,(y)         | movl $1,(x)   ;
exists (x=2 /\ 1:rax=1)