End EVAL_BUILTIN_ARG.
Hint Constructors eval_builtin_arg: barg.
(** Invariance by change of global environment. *)
Section EVAL_BUILTIN_ARG_PRESERVED.
Variables A F1 V1 F2 V2: Type.
Variable ge1: Genv.t F1 V1.
Variable ge2: Genv.t F2 V2.
Variable e: A -> val.
Variable sp: val.
Variable m: mem.
Hypothesis symbols_preserved:
forall id, Genv.find_symbol ge2 id = Genv.find_symbol ge1 id.

Lemma eval_builtin_arg_preserved:
forall a v, eval_builtin_arg ge1 e sp m a v -> eval_builtin_arg ge2 e sp m a v.