Definition cast_pointer_to_bool t1 t2 :=
 match t1 with (Tpointer _ _ | Tarray _ _ _ | Tfunction _ _ _) => 
           match t2 with Tint IBool _ _ => true | _ => false end
 | _ => false
end.

Lemma isBinOpResultType_binop_stable: forall {CS: compspecs} b e1 e2 t rho phi, denote_tc_assert (isBinOpResultType b e1 e2 t) rho phi -> binop_stable cenv_cs b e1 e2 = true.