[turbofan] Remove untested no-deoptimization code path from JSGlobalObjectSpecialization.

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 534 matching lines @@
                                    : JSCallReducer::kNoFlags,
                                data->native_context());
     JSContextSpecialization context_specialization(
         &graph_reducer, data->jsgraph(),
         data->info()->is_function_context_specializing()
             ? data->info()->context()
             : MaybeHandle<Context>());
     JSFrameSpecialization frame_specialization(data->info()->osr_frame(),
                                                data->jsgraph());
     JSGlobalObjectSpecialization global_object_specialization(
-        &graph_reducer, data->jsgraph(),
-        data->info()->is_deoptimization_enabled()
-            ? JSGlobalObjectSpecialization::kDeoptimizationEnabled
-            : JSGlobalObjectSpecialization::kNoFlags,
-        data->native_context(), data->info()->dependencies());
+        &graph_reducer, data->jsgraph(), data->native_context(),
+        data->info()->dependencies());
     JSNativeContextSpecialization native_context_specialization(
         &graph_reducer, data->jsgraph(),
         data->info()->is_deoptimization_enabled()
             ? JSNativeContextSpecialization::kDeoptimizationEnabled
             : JSNativeContextSpecialization::kNoFlags,
         data->native_context(), data->info()->dependencies(), temp_zone);
     JSInliningHeuristic inlining(&graph_reducer,
                                  data->info()->is_inlining_enabled()
                                      ? JSInliningHeuristic::kGeneralInlining
                                      : JSInliningHeuristic::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);
     }
-    AddReducer(data, &graph_reducer, &global_object_specialization);
+    if (data->info()->is_deoptimization_enabled()) {
+      AddReducer(data, &graph_reducer, &global_object_specialization);
+    }
     AddReducer(data, &graph_reducer, &native_context_specialization);
     AddReducer(data, &graph_reducer, &context_specialization);
     AddReducer(data, &graph_reducer, &call_reducer);
     AddReducer(data, &graph_reducer, &inlining);
     graph_reducer.ReduceGraph();
   }
 };
 
 
 struct TyperPhase {
@@ skipping 900 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8