[hoisting] Fix reporting logic

Summary: We don't want to use Cost analysis results when `Config.hoisting_report_only_expensive` is false

Reviewed By: ezgicicek

Differential Revision: D14124555

fbshipit-source-id: e809bb80a

infer/src/checkers/hoisting.ml

@@ -79,16 +79,7 @@ let model_satisfies ~f tenv pname =
   InvariantModels.ProcName.dispatch tenv pname |> Option.exists ~f
 
 
-let get_issue_to_report tenv Call.({pname; node; params}) integer_type_widths inferbo_invariant_map
-    =
-  (* If a function is modeled as variant for hoisting (like
-     List.size or __cast ), we don't want to report it *)
-  let is_variant_for_hoisting =
-    model_satisfies ~f:InvariantModels.is_variant_for_hoisting tenv pname
-  in
-  let report_invariant =
-    ((not is_variant_for_hoisting) && not Config.hoisting_report_only_expensive)
-    ||
+let is_call_expensive Call.({pname; node; params}) integer_type_widths inferbo_invariant_map =
   (* only report if function call has expensive/symbolic cost *)
   match Ondemand.analyze_proc_name pname with
   | Some ({Summary.payloads= {Payloads.cost= Some {CostDomain.post= cost_record}}} as summary)
@@ -102,13 +93,26 @@ let get_issue_to_report tenv Call.({pname; node; params}) integer_type_widths in
       let callee_formals = Summary.get_proc_desc summary |> Procdesc.get_pvar_formals in
       let loc = InstrCFG.Node.loc last_node in
       (* get the cost of the function call *)
-        Cost.instantiate_cost integer_type_widths ~inferbo_caller_mem:inferbo_mem
-          ~callee_pname:pname ~callee_formals ~params
+      Cost.instantiate_cost integer_type_widths ~inferbo_caller_mem:inferbo_mem ~callee_pname:pname
+        ~callee_formals ~params
         ~callee_cost:(CostDomain.get_operation_cost cost_record)
         ~loc
       |> CostDomain.BasicCost.is_symbolic
   | _ ->
       false
+
+
+let get_issue_to_report tenv (Call.({pname}) as call) integer_type_widths inferbo_invariant_map =
+  let report_invariant =
+    if Config.hoisting_report_only_expensive then
+      is_call_expensive call integer_type_widths inferbo_invariant_map
+    else
+      (* If a function is modeled as variant for hoisting (like
+       List.size or __cast ), we don't want to report it *)
+      let is_variant_for_hoisting =
+        model_satisfies ~f:InvariantModels.is_variant_for_hoisting tenv pname
+      in
+      not is_variant_for_hoisting
   in
   if report_invariant then
     if model_satisfies ~f:InvariantModels.is_invariant tenv pname then

infer/src/checkers/registerCheckers.ml

@@ -106,19 +106,15 @@ let all_checkers =
     ; active= Config.uninit
     ; callbacks= [(Procedure Uninit.checker, Language.Clang)] }
   ; { name= "cost analysis"
-    ; active= Config.cost
+    ; active= Config.cost || (Config.loop_hoisting && Config.hoisting_report_only_expensive)
     ; callbacks= [(Procedure Cost.checker, Language.Clang); (Procedure Cost.checker, Language.Java)]
     }
   ; { name= "loop hoisting"
     ; active= Config.loop_hoisting
     ; callbacks=
-        ( (Procedure Hoisting.checker, Language.Clang)
+        (Procedure Hoisting.checker, Language.Clang)
         :: (Procedure Hoisting.checker, Language.Java)
-          ::
-          ( if Config.hoisting_report_only_expensive then
-            [(Procedure Cost.checker, Language.Clang); (Procedure Cost.checker, Language.Java)]
-          else [] )
-        @ if Config.purity then [(Procedure Purity.checker, Language.Java)] else [] ) }
+        :: (if Config.purity then [(Procedure Purity.checker, Language.Java)] else []) }
   ; { name= "Starvation analysis"
     ; active= Config.starvation
     ; callbacks=