[turbofan] Specialize to closure with function context specialization.

src/compiler/pipeline.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <memory>
 #include <sstream>
 
@@ skipping 781 matching lines @@
     CheckpointElimination checkpoint_elimination(&graph_reducer);
     CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
                                          data->common(), data->machine());
     JSCallReducer call_reducer(&graph_reducer, data->jsgraph(),
                                data->native_context(),
                                data->info()->dependencies());
     JSContextSpecialization context_specialization(
         &graph_reducer, data->jsgraph(),
         data->info()->is_function_context_specializing()
             ? handle(data->info()->context())
-            : MaybeHandle<Context>());
+            : MaybeHandle<Context>(),
+        data->info()->is_function_context_specializing()
+            ? data->info()->closure()
+            : MaybeHandle<JSFunction>());
     JSFrameSpecialization frame_specialization(
         &graph_reducer, data->info()->osr_frame(), data->jsgraph());
     JSNativeContextSpecialization::Flags flags =
         JSNativeContextSpecialization::kNoFlags;
     if (data->info()->is_accessor_inlining_enabled()) {
       flags |= JSNativeContextSpecialization::kAccessorInliningEnabled;
     }
     if (data->info()->is_bailout_on_uninitialized()) {
       flags |= JSNativeContextSpecialization::kBailoutOnUninitialized;
     }
@@ skipping 1209 matching lines @@
   data->DeleteRegisterAllocationZone();
 }
 
 CompilationInfo* PipelineImpl::info() const { return data_->info(); }
 
 Isolate* PipelineImpl::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8