(** Injections on registers *)

  Definition reg_ren f (r:PregEq.t) (rs rs' : regset) : Prop :=
    val_obs f (Pregmap.get r rs) (Pregmap.get r rs').Definition regset_ren f rs rs' : Prop :=
    forall r, reg_ren f r rs rs'.Definition core_inj f c c' :=
    match c, c' with State rs _, State rs' _ => regset_ren f rs rs' end.

Lemma find_funct_ptr_ren: forall (g : genv) b1 b2 ofs (f fg : memren) fn (Hfg: forall b1 b2, fg b1 = Some b2 -> b1 = b2) (Hge_wd: ge_wd fg g) (Hincr: ren_incr fg f) (Hobs_eq: val_obs f (Vptr b1 ofs) (Vptr b2 ofs)) (Hget: Genv.find_funct_ptr g b1 = Some fn), b1 = b2.