Section CMCONSTR.
Variable ge: genv.
Variable sp: val.
Variable e: env.
Variable m: mem.
Definition unary_constructor_sound (cstr: expr -> expr) (sem: val -> val) : Prop :=
forall le a x,
eval_expr ge sp e m le a x ->
exists v, eval_expr ge sp e m le (cstr a) v /\ Val.lessdef (sem x) v.
Definition binary_constructor_sound (cstr: expr -> expr -> expr) (sem: val -> val -> val) : Prop :=
forall le a x b y,
eval_expr ge sp e m le a x ->
eval_expr ge sp e m le b y ->
exists v, eval_expr ge sp e m le (cstr a b) v /\ Val.lessdef (sem x y) v.
Definition partial_unary_constructor_sound (cstr: expr -> expr) (sem: val -> option val) : Prop :=
forall le a x y,
eval_expr ge sp e m le a x ->
sem x = Some y ->
exists v, eval_expr ge sp e m le (cstr a) v /\ Val.lessdef y v.
Definition partial_binary_constructor_sound (cstr: expr -> expr -> expr) (sem: val -> val -> option val) : Prop :=
forall le a x b y z,
eval_expr ge sp e m le a x ->
eval_expr ge sp e m le b y ->
sem x y = Some z ->
exists v, eval_expr ge sp e m le (cstr a b) v /\ Val.lessdef z v.
(** ** Constants *)
(** ** Conversions *)
(** ** Addition, opposite, subtraction *)

Theorem eval_subl: binary_constructor_sound subl Val.subl.