Program Definition function_bounds := {|
used_callee_save := RegSet.elements record_regs_of_function;
bound_local := max_over_slots_of_funct local_slot;
bound_outgoing := Z.max (max_over_instrs outgoing_space) (max_over_slots_of_funct outgoing_slot);
bound_stack_data := Z.max f.(fn_stacksize) 0
|}.
Next Obligation.
apply max_over_slots_of_funct_pos.
Qed.
Next Obligation.
apply Z.le_ge. eapply Z.le_trans. 2: apply Z.le_max_r.
apply Z.ge_le. apply max_over_slots_of_funct_pos.
Qed.
Next Obligation.
apply Z.le_ge. apply Z.le_max_r.
Qed.
Next Obligation.
generalize (RegSet.elements_3w record_regs_of_function).
generalize (RegSet.elements record_regs_of_function).
induction 1. constructor. constructor; auto.
red; intros; elim H. apply InA_alt. exists x; auto.
Qed.
Next Obligation.
apply record_regs_of_function_only. apply RegSet.elements_2.
apply InA_alt. exists r; auto.
Qed.
(** We now show the correctness of the inferred bounds. *)

Lemma record_regs_of_function_ok:
forall r i, In i f.(fn_code) -> defined_by_instr r i -> is_callee_save r = true -> RegSet.In r record_regs_of_function.