(*From Cminorgenproof*)
Remark val_inject_function_pointer:
  forall v fd j tv,
  Genv.find_funct ge v = Some fd ->
  globalfunction_ptr_inject j ->
  val_inject j v tv ->
  tv = v.

Lemma eval_sel_unop: forall le op a1 v1 v, eval_expr tge sp e m le a1 v1 -> eval_unop op v1 = Some v -> exists v', eval_expr tge sp e m le (sel_unop hf op a1) v' /\ Val.lessdef v v'.