Global Opaque denote_tc_test_eq.
Hint Rewrite @sem_add_pi_ptr_special' using (solve [try reflexivity; auto with norm]) : norm.
Hint Rewrite @sem_add_pl_ptr_special' using (solve [try reflexivity; auto with norm]) : norm.

(* Specifications: *)
Lemma isptr_force_sem_add_ptr_int:
forall {cs: compspecs}  t si p i,
isptr p ->
isptr (force_val (sem_add_ptr_int t si p (Vint (Int.repr i)))).