Hint Resolve tc_val_pointer_nullval'.
Arguments type_is_volatile ty / .
Definition is_int32_noattr_type t :=
match t with
| Tint I32 _ {| attr_volatile := false; attr_alignas := None |} => True
| _ => False
end.

Lemma tc_val_pointer_nullval:
forall t, tc_val (Tpointer t noattr) nullval.