[IR] remove dead no_return CallFlag

Summary:
This was never set to true except in a wrong way in the Java frontend
(see previous diff).

Reviewed By: dulmarod

Differential Revision: D18573927

fbshipit-source-id: 4c9d1a855

infer/src/IR/CallFlags.ml

@@ -17,7 +17,6 @@ type t =
   ; cf_injected_destructor: bool
   ; cf_interface: bool
   ; cf_is_objc_block: bool
-  ; cf_noreturn: bool
   ; cf_virtual: bool
   ; cf_with_block_parameters: bool }
 [@@deriving compare]
@@ -27,14 +26,12 @@ let pp f
      ; cf_injected_destructor
      ; cf_interface
      ; cf_is_objc_block
-     ; cf_noreturn
      ; cf_with_block_parameters
      ; cf_virtual }[@warning "+9"]) =
   if cf_assign_last_arg then F.pp_print_string f " assign_last" ;
   if cf_injected_destructor then F.pp_print_string f " injected" ;
   if cf_interface then F.pp_print_string f " interface" ;
   if cf_is_objc_block then F.pp_print_string f " objc_block" ;
-  if cf_noreturn then F.pp_print_string f " noreturn" ;
   if cf_with_block_parameters then F.pp_print_string f " block_params" ;
   if cf_virtual then F.pp_print_string f " virtual" ;
   ()
@@ -45,6 +42,5 @@ let default =
   ; cf_injected_destructor= false
   ; cf_interface= false
   ; cf_is_objc_block= false
-  ; cf_noreturn= false
   ; cf_with_block_parameters= false
   ; cf_virtual= false }

infer/src/IR/CallFlags.mli

@@ -18,7 +18,6 @@ type t =
         (** true if this is an implicit C++ destructor call injected by the clang frontend *)
   ; cf_interface: bool
   ; cf_is_objc_block: bool
-  ; cf_noreturn: bool
   ; cf_virtual: bool
   ; cf_with_block_parameters: bool }
 [@@deriving compare]

infer/src/backend/preanal.ml

@@ -217,8 +217,6 @@ module NoReturn = struct
     Procdesc.Node.get_instrs node
     |> Instrs.exists ~f:(fun (instr : Sil.instr) ->
            match instr with
-           | Call (_, _, _, _, {cf_noreturn= true}) ->
-               true
            | Call (_, Const (Cfun proc_name), _, _, _) -> (
              match Attributes.load proc_name with
              | Some {ProcAttributes.is_no_return= true} ->

infer/src/biabduction/SymExec.ml

@@ -1476,29 +1476,23 @@ let rec sym_exec exe_env tenv current_summary instr_ (prop_ : Prop.normal Prop.t
         && not (Rearrange.is_only_pt_by_fld_or_param_nonnull current_pdesc tenv prop_r fun_exp)
       then Rearrange.check_call_to_objc_block_error tenv current_pdesc prop_r fun_exp loc ;
       Rearrange.check_dereference_error tenv current_pdesc prop_r fun_exp loc ;
-      if call_flags.CallFlags.cf_noreturn then (
-        L.d_str "Unknown function pointer with noreturn attribute " ;
-        Sil.d_exp fun_exp ;
-        L.d_strln ", diverging." ;
-        diverge prop_r path )
-      else (
-        L.d_str "Unknown function pointer " ;
-        Sil.d_exp fun_exp ;
-        L.d_strln ", returning undefined value." ;
-        let callee_pname = Typ.Procname.from_string_c_fun "__function_pointer__" in
-        unknown_or_scan_call ~is_scan:false ~reason:"unresolved function pointer" (snd ret_id_typ)
-          Annot.Item.empty
-          Builtin.
-            { summary= current_summary
-            ; instr
-            ; tenv
-            ; prop_= prop_r
-            ; path
-            ; ret_id_typ
-            ; args= n_actual_params
-            ; proc_name= callee_pname
-            ; loc
-            ; exe_env } )
+      L.d_str "Unknown function pointer " ;
+      Sil.d_exp fun_exp ;
+      L.d_strln ", returning undefined value." ;
+      let callee_pname = Typ.Procname.from_string_c_fun "__function_pointer__" in
+      unknown_or_scan_call ~is_scan:false ~reason:"unresolved function pointer" (snd ret_id_typ)
+        Annot.Item.empty
+        Builtin.
+          { summary= current_summary
+          ; instr
+          ; tenv
+          ; prop_= prop_r
+          ; path
+          ; ret_id_typ
+          ; args= n_actual_params
+          ; proc_name= callee_pname
+          ; loc
+          ; exe_env }
   | Sil.Metadata (Nullify (pvar, _)) -> (
       let eprop = Prop.expose prop_ in
       match

infer/src/pulse/Pulse.ml

@@ -110,7 +110,7 @@ module PulseTransferFunctions = struct
     let model =
       match proc_name_of_call call_exp with
       | Some callee_pname ->
-          PulseModels.dispatch tenv callee_pname flags
+          PulseModels.dispatch tenv callee_pname
       | None ->
           (* function pointer, etc.: skip for now *)
           None

infer/src/pulse/PulseModels.ml

@@ -296,13 +296,9 @@ let builtins_dispatcher =
   fun proc_name -> Hashtbl.find builtins_map proc_name
 
 
-let dispatch tenv proc_name flags =
+let dispatch tenv proc_name =
   match builtins_dispatcher proc_name with
   | Some _ as result ->
       result
-  | None -> (
-    match ProcNameDispatcher.dispatch tenv proc_name with
-    | Some _ as result ->
-        result
-    | None ->
-        if flags.CallFlags.cf_noreturn then Some Misc.early_exit else None )
+  | None ->
+      ProcNameDispatcher.dispatch tenv proc_name

infer/src/pulse/PulseModels.mli

@@ -17,4 +17,4 @@ type exec_fun =
 
 type model = exec_fun
 
-val dispatch : Tenv.t -> Typ.Procname.t -> CallFlags.t -> model option
+val dispatch : Tenv.t -> Typ.Procname.t -> model option