Test SB+mfence+pontna+UC+WB

X86_64 SB+mfence+pontna+UC+WB
"MFencedWR FreNaNT PodWRNTNa Fre"
MT=x:UC y:WB
Generator=diyone7 (version 7.56+02~dev)
Prefetch=0:x=F,0:y=T,1:y=F,1:x=T
Com=Fr Fr
Orig=MFencedWR FreNaNT PodWRNTNa Fre
Align=
{
1:rax=y;
}
 P0            | P1                  ;
 movl $1,(x)   | movl $1,%ebx        ;
 mfence        | movntil %ebx,(%rax) ;
 movl (y),%eax | movl (x),%ecx       ;
exists (0:rax=0 /\ 1:rcx=0)