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(*              The Compcert verified compiler                         *)
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(*         Xavier Leroy, Collège de France and INRIA Paris             *)
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(*  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.     *)
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(** Correctness proof for AArch64 code generation: auxiliary results. *)
Local Transparent Archi.ptr64.
(** Properties of registers *)
Hint Resolve preg_of_iregsp_not_PC: asmgen.

Lemma ireg_of_not_X16': forall r x, ireg_of r = OK x -> IR x <> IR X16.