Implement a pass to filter the unused input arguments in the loop functions

3 files changed, 15 insertions, 20 deletions

diff --git a/tests/fstar/misc/Loops.Clauses.Template.fst b/tests/fstar/misc/Loops.Clauses.Template.fst
index bc5ed046..053b7663 100644
--- a/tests/fstar/misc/Loops.Clauses.Template.fst
+++ b/tests/fstar/misc/Loops.Clauses.Template.fst
@@ -46,8 +46,7 @@ let get_elem_mut_loop_decreases (x : usize) (ls : list_t usize) : nat =
 
 (** [loops::get_elem_shared]: decreases clause *)
 unfold
-let get_elem_shared_loop_decreases (slots : vec (list_t usize)) (x : usize)
-  (ls : list_t usize) (ls0 : list_t usize) : nat =
+let get_elem_shared_loop_decreases (x : usize) (ls : list_t usize) : nat =
   admit ()
 
 (** [loops::list_nth_mut_loop_with_id]: decreases clause *)
@@ -58,8 +57,8 @@ let list_nth_mut_loop_with_id_loop_decreases (t : Type0) (i : u32)
 
 (** [loops::list_nth_shared_loop_with_id]: decreases clause *)
 unfold
-let list_nth_shared_loop_with_id_loop_decreases (t : Type0) (ls : list_t t)
-  (i : u32) (ls0 : list_t t) : nat =
+let list_nth_shared_loop_with_id_loop_decreases (t : Type0) (i : u32)
+  (ls : list_t t) : nat =
   admit ()
 
 (** [loops::list_nth_mut_loop_pair]: decreases clause *)
diff --git a/tests/fstar/misc/Loops.Clauses.fst b/tests/fstar/misc/Loops.Clauses.fst
index c748da71..82f34de1 100644
--- a/tests/fstar/misc/Loops.Clauses.fst
+++ b/tests/fstar/misc/Loops.Clauses.fst
@@ -43,8 +43,7 @@ let get_elem_mut_loop_decreases (x : usize) (ls : list_t usize) : list_t usize =
 
 (** [loops::get_elem_shared]: decreases clause *)
 unfold
-let get_elem_shared_loop_decreases (slots : vec (list_t usize)) (x : usize)
-  (ls : list_t usize) (ls0 : list_t usize) : list_t usize =
+let get_elem_shared_loop_decreases (x : usize) (ls : list_t usize) : list_t usize =
   ls
 
 (** [loops::list_nth_mut_loop_with_id]: decreases clause *)
@@ -55,8 +54,8 @@ let list_nth_mut_loop_with_id_loop_decreases (t : Type0) (i : u32) (ls : list_t
 
 (** [loops::list_nth_shared_loop_with_id]: decreases clause *)
 unfold
-let list_nth_shared_loop_with_id_loop_decreases (t : Type0) (l : list_t t)
-  (i : u32) (ls : list_t t) : list_t t =
+let list_nth_shared_loop_with_id_loop_decreases (t : Type0) (i : u32)
+  (ls : list_t t) : list_t t =
   ls
 
 (** [loops::list_nth_mut_loop_pair]: decreases clause *)
diff --git a/tests/fstar/misc/Loops.Funs.fst b/tests/fstar/misc/Loops.Funs.fst
index ebf30654..73539cf6 100644
--- a/tests/fstar/misc/Loops.Funs.fst
+++ b/tests/fstar/misc/Loops.Funs.fst
@@ -222,14 +222,11 @@ let get_elem_mut_back
 
 (** [loops::get_elem_shared] *)
 let rec get_elem_shared_loop_fwd
-  (slots : vec (list_t usize)) (x : usize) (ls : list_t usize)
-  (ls0 : list_t usize) :
-  Tot (result usize)
-  (decreases (get_elem_shared_loop_decreases slots x ls ls0))
+  (x : usize) (ls : list_t usize) :
+  Tot (result usize) (decreases (get_elem_shared_loop_decreases x ls))
   =
   begin match ls with
-  | ListCons y tl ->
-    if y = x then Return y else get_elem_shared_loop_fwd slots x tl ls0
+  | ListCons y tl -> if y = x then Return y else get_elem_shared_loop_fwd x tl
   | ListNil -> Fail Failure
   end
 
@@ -238,7 +235,7 @@ let get_elem_shared_fwd
   (slots : vec (list_t usize)) (x : usize) : result usize =
   begin match vec_index_fwd (list_t usize) slots 0 with
   | Fail e -> Fail e
-  | Return l -> get_elem_shared_loop_fwd slots x l l
+  | Return l -> get_elem_shared_loop_fwd x l
   end
 
 (** [loops::id_mut] *)
@@ -313,18 +310,18 @@ let list_nth_mut_loop_with_id_back
 
 (** [loops::list_nth_shared_loop_with_id] *)
 let rec list_nth_shared_loop_with_id_loop_fwd
-  (t : Type0) (ls : list_t t) (i : u32) (ls0 : list_t t) :
+  (t : Type0) (i : u32) (ls : list_t t) :
   Tot (result t)
-  (decreases (list_nth_shared_loop_with_id_loop_decreases t ls i ls0))
+  (decreases (list_nth_shared_loop_with_id_loop_decreases t i ls))
   =
-  begin match ls0 with
+  begin match ls with
   | ListCons x tl ->
     if i = 0
     then Return x
     else
       begin match u32_sub i 1 with
       | Fail e -> Fail e
-      | Return i0 -> list_nth_shared_loop_with_id_loop_fwd t ls i0 tl
+      | Return i0 -> list_nth_shared_loop_with_id_loop_fwd t i0 tl
       end
   | ListNil -> Fail Failure
   end
@@ -334,7 +331,7 @@ let list_nth_shared_loop_with_id_fwd
   (t : Type0) (ls : list_t t) (i : u32) : result t =
   begin match id_shared_fwd t ls with
   | Fail e -> Fail e
-  | Return ls0 -> list_nth_shared_loop_with_id_loop_fwd t ls i ls0
+  | Return ls0 -> list_nth_shared_loop_with_id_loop_fwd t i ls0
   end
 
 (** [loops::list_nth_mut_loop_pair] *)