[turbofan] Context specialization should only specialize loads/stores.

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 <sstream>
 
 #include "src/base/adapters.h"
@@ skipping 480 matching lines @@
 struct InliningPhase {
   static const char* phase_name() { return "inlining"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
     JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
     DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
                                               data->common());
     CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
                                          data->common(), data->machine());
     JSContextSpecialization context_specialization(
-        &graph_reducer, data->jsgraph(), data->info()->context());
+        &graph_reducer, data->jsgraph(), data->info()->is_context_specializing()
+                                             ? data->info()->context()
+                                             : MaybeHandle<Context>());
     JSFrameSpecialization frame_specialization(data->info()->osr_frame(),
                                                data->jsgraph());
     JSInliner inliner(&graph_reducer, data->info()->is_inlining_enabled()
                                           ? JSInliner::kGeneralInlining
                                           : JSInliner::kRestrictedInlining,
                       temp_zone, data->info(), data->jsgraph());
     AddReducer(data, &graph_reducer, &dead_code_elimination);
     AddReducer(data, &graph_reducer, &common_reducer);
     if (data->info()->is_frame_specializing()) {
       AddReducer(data, &graph_reducer, &frame_specialization);
     }
-    if (data->info()->is_context_specializing()) {
-      AddReducer(data, &graph_reducer, &context_specialization);
-    }
+    AddReducer(data, &graph_reducer, &context_specialization);
     AddReducer(data, &graph_reducer, &inliner);
     graph_reducer.ReduceGraph();
   }
 };
 
 
 struct TyperPhase {
   static const char* phase_name() { return "typer"; }
 
   void Run(PipelineData* data, Zone* temp_zone, Typer* typer) {
@@ skipping 831 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8