(* *********************************************************************)
(*                                                                     *)
(*              The Compcert verified compiler                         *)
(*                                                                     *)
(*          Xavier Leroy, INRIA Paris-Rocquencourt                     *)
(*                                                                     *)
(*  Copyright Institut National de Recherche en Informatique et en     *)
(*  Automatique.  All rights reserved.  This file is distributed       *)
(*  under the terms of the INRIA Non-Commercial License Agreement.     *)
(*                                                                     *)
(* *********************************************************************)
(** Correctness proof for Asm generation: machine-independent framework *)
Require Intv.
(** * Processor registers and register states *)
Hint Extern 2 (_ <> _) => congruence: asmgen.

Lemma preg_of_injective:
forall r1 r2, preg_of r1 = preg_of r2 -> r1 = r2.