Require VST.floyd.aggregate_pred. Import VST.floyd.aggregate_pred.aggregate_pred.
Hint Extern 2 (field_compatible0 _ (ArraySubsc _ :: _) _) =>
(eapply field_compatible0_cons_Tarray; [reflexivity | | omega])
: field_compatible.
Hint Extern 2 (field_compatible _ (ArraySubsc _ :: _) _) =>
(eapply field_compatible_cons_Tarray; [reflexivity | | omega])
: field_compatible.
Hint Extern 2 (field_compatible (Tarray _ _ _) nil _) =>
(eapply field_compatible_array_smaller0; [eassumption | omega]) : field_compatible.
Hint Extern 2 (field_compatible (tarray _ _) nil _) =>
(eapply field_compatible_array_smaller0; [eassumption | omega]) : field_compatible.
Hint Extern 2 (field_compatible0 (Tarray _ _ _) nil _) =>
(eapply field_compatible0_array_smaller0; [eassumption | omega]) : field_compatible.
Hint Extern 2 (field_compatible0 (tarray _ _) nil _) =>
(eapply field_compatible0_array_smaller0; [eassumption | omega]) : field_compatible.
Hint Extern 2 (field_compatible0 (Tarray _ _ _) (ArraySubsc _ :: nil) _) =>
(eapply field_compatible0_array_smaller1; [eassumption | omega | omega]) : field_compatible.
Hint Extern 2 (field_compatible0 (tarray _ _) (ArraySubsc _ :: nil) _) =>
(eapply field_compatible0_array_smaller1; [eassumption | omega | omega]) : field_compatible.
Arguments nested_field_array_type {cs} t gfs lo hi / .
Hint Resolve field_compatible_field_compatible0 : field_compatible.
Hint Resolve field_compatible0_ArraySubsc0 : field_compatible.
Hint Extern 2 (legal_nested_field0 _ _) =>
(apply compute_legal_nested_field0_spec'; repeat constructor; omega) : field_compatible.
Hint Extern 2 (field_compatible0 _ _ (offset_val _ _)) =>
(apply field_compatible0_nested_field_array; auto with field_compatible) : core. (*FIXME: should be field_compatible*)
(* Hint Extern 2 (field_compatible0 (Tarray _ _ _) (ArraySubsc _ :: nil) _) => (eapply field_compatible0_Tarray_offset; [eassumption | omega | omega]) : field_compatible.  Hint Extern 2 (field_compatible0 (tarray _ _) (ArraySubsc _ :: nil) _) => (eapply field_compatible0_Tarray_offset; [eassumption | omega | omega]) : field_compatible. *)
Transparent sizeof.
Opaque sizeof.

Lemma split2_data_at__Tarray_tschar
: forall {cs} (sh : Share.t)  (n n1 : Z) (p : val),
0 <= n1 <= n -> isptr p ->field_compatible (Tarray tschar n noattr) [] p ->
@data_at_ cs sh (Tarray tschar n noattr) p =
@data_at_ cs sh (Tarray tschar n1 noattr) p *
@data_at_ cs sh (Tarray tschar (n - n1) noattr)
(field_address0 (Tarray tschar n noattr) [ArraySubsc n1] p).