diff --git a/src/ext/zrapp/availexps.ml b/src/ext/zrapp/availexps.ml
index 453e7e128..48dc8a740 100644
--- a/src/ext/zrapp/availexps.ml
+++ b/src/ext/zrapp/availexps.ml
@@ -243,14 +243,6 @@ let eh_handle_inst i eh =
       (eh_kill_mem eh;
        eh_kill_addrof_or_global eh;
        eh)
-  (* todo: didn't find location where stmts are handled *)
-  (*
-  | Asm(_,_,_,_,_,_) ->
-      let _,d = UD.computeUseDefInstr i in
-      (UD.VS.iter (fun vi ->
-	eh_kill_vi eh vi) d;
-       eh)
-  *)
   | VarDecl _ ->   raise (Unimplemented "VarDecl") (* VarDecl instruction is not supported for availexps, to make availexps work for programs without VLA *)
                                                    (* make sure to set alwaysGenerateVarDecl in cabs2cil.ml to false. To support VLA, implement this.  *)
 
diff --git a/src/ext/zrapp/availexpslv.ml b/src/ext/zrapp/availexpslv.ml
index 73939607e..8b42eb1c1 100644
--- a/src/ext/zrapp/availexpslv.ml
+++ b/src/ext/zrapp/availexpslv.ml
@@ -305,15 +305,6 @@ let lvh_handle_inst i lvh =
       end;
       lvh
   end
-  (* todo *)
-  (*
-  | Asm(_,_,_,_,_,_) -> begin
-      let _,d = UD.computeUseDefInstr i in
-      UD.VS.iter (fun vi ->
-	lvh_kill_vi lvh vi) d;
-      lvh
-  end
-  *)
   | VarDecl _ ->   raise (Unimplemented "VarDecl") (* VarDecl instruction is not supported for availexpslv, to make availexpslv work for programs without VLA *)
                                                    (* make sure to set alwaysGenerateVarDecl in cabs2cil.ml to false. To support VLA, implement this.  *)
 
diff --git a/src/ext/zrapp/deadcodeelim.ml b/src/ext/zrapp/deadcodeelim.ml
index 72716b03d..50ab8f5d7 100644
--- a/src/ext/zrapp/deadcodeelim.ml
+++ b/src/ext/zrapp/deadcodeelim.ml
@@ -102,14 +102,6 @@ class usedDefsCollectorClass = object(self)
 
   method! vinst i =
     let handle_inst iosh i = match i with
-    (* todo *)
-    (*
-    | Asm(_,_,slvl,_,_,_) -> List.iter (fun (_,s,lv) ->
-	match lv with (Var v, off) ->
-	  if s.[0] = '+' then
-	    self#add_defids iosh (Lval(Var v, off)) (UD.VS.singleton v)
-	| _ -> ()) slvl
-    *)
     | Call(_,ce,el,_,_) when not (!callHasNoSideEffects i) ->
 	List.iter (fun e ->
 	  let u = UD.computeUseExp e in
diff --git a/src/ext/zrapp/reachingdefs.ml b/src/ext/zrapp/reachingdefs.ml
index d708f926c..4a953bdd6 100644
--- a/src/ext/zrapp/reachingdefs.ml
+++ b/src/ext/zrapp/reachingdefs.ml
@@ -270,11 +270,6 @@ let getDefRhs didstmh stmdat defId =
 		Set((Var vi',NoOffset),_,_,_) -> vi'.vid = vid (* _ -> NoOffset *)
 	      | Call(Some(Var vi',NoOffset),_,_,_,_) -> vi'.vid = vid (* _ -> NoOffset *)
 	      | Call(None,_,_,_,_) -> false
-              (* todo *)
-              (*
-	      | Asm(_,_,sll,_,_,_) -> List.exists
-		    (function (_,_,(Var vi',NoOffset)) -> vi'.vid = vid | _ -> false) sll
-              *)
 	      | _ -> false)
 	  | None -> false) iihl in
 	(match i with
@@ -287,10 +282,6 @@ let getDefRhs didstmh stmdat defId =
 	| Call(lvo,e,el,_,_) ->
 	    (IH.add rhsHtbl defId (Some(RDCall(i),stm.sid,iosh_in));
 	     Some(RDCall(i), stm.sid, iosh_in))
-        (* todo *)
-        (*
-	| Asm(a,sl,slvl,sel,sl',_) -> None
-        *)
   | VarDecl _ -> None
   ) (* ? *)
 	with Not_found ->
diff --git a/src/ext/zrapp/rmciltmps.ml b/src/ext/zrapp/rmciltmps.ml
index aeec09ea1..3809bd821 100644
--- a/src/ext/zrapp/rmciltmps.ml
+++ b/src/ext/zrapp/rmciltmps.ml
@@ -994,19 +994,6 @@ class unusedRemoverClass : cilVisitor = object(self)
 	  (match IH.find iioh vi.vid with
 	    None -> true | Some _ -> false)
       end
-      (* todo *)
-      (*
-      | Asm(_,_,slvlst,_,_,_) -> begin
-	  (* make sure the outputs are in the locals list *)
-	  List.iter (fun (_,s,lv) ->
-	    match lv with (Var vi,_) ->
-	      if List.mem vi cur_func.slocals
-	      then ()
-	      else cur_func.slocals <- vi::cur_func.slocals
-	    |_ -> ()) slvlst;
-	  true
-      end
-      *)
       | _ -> true
     in