(*Require Import VST.veric.Clight_new.*)
Set Bullet Behavior "Strict Subproofs".
(* Variables to be instantiated once the program is known. *)
Definition _f := 1%positive.      (* alpha-convertible *)
Definition _args := 2%positive.   (* alpha-convertible *)
Definition _lock := 1%positive.   (* alpha-convertible *)
Definition _cond := 2%positive.   (* alpha-convertible *)
(*Definition _lock_t := 2%positive. (* 2 (* or sometimes 3 -WM *) is the number given by clightgen when threads.h is included first *)*)
Definition voidstar_funtype := Tfunction (Tcons (tptr tvoid) Tnil) (tptr tvoid) cc_default.
(* Definition tlock := Tstruct _lock_t noattr. *)
Definition tlock := (Tarray (Tpointer Tvoid noattr) 2 noattr).
(* Notation tlock := tuint (only parsing). *)
Goal forall (cenv: composite_env), @sizeof cenv tlock = LKSIZE.

Lemma eqp_sepcon : forall (G : Triv) (P P' Q Q' : mpred)
(HP : (G |-- P <=> P')%logic) (HQ : (G |-- Q <=> Q')%logic), (G |-- P * Q <=> P' * Q')%logic.