Revert of [turbofan] Add support for copy-on-write element 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 <memory>
 #include <sstream>
 
@@ skipping 597 matching lines @@
   if (!info()->is_optimizing_from_bytecode()) {
     if (FLAG_inline_accessors) {
       info()->MarkAsAccessorInliningEnabled();
     }
     if (info()->is_deoptimization_enabled() && FLAG_turbo_type_feedback) {
       info()->MarkAsTypeFeedbackEnabled();
     }
     if (!Compiler::EnsureDeoptimizationSupport(info())) return FAILED;
   }
 
-  // TODO(mstarzinger): Hack to ensure that certain call descriptors are
+  // TODO(mstarzinger): Hack to ensure that the ToNumber call descriptor is
   // initialized on the main thread, since it is needed off-thread by the
   // effect control linearizer.
-  CodeFactory::CopyFixedArray(info()->isolate());
   CodeFactory::ToNumber(info()->isolate());
 
   linkage_ = new (&zone_) Linkage(Linkage::ComputeIncoming(&zone_, info()));
 
   if (!pipeline_.CreateGraph()) {
     if (isolate()->has_pending_exception()) return FAILED;  // Stack overflowed.
     return AbortOptimization(kGraphBuildingFailed);
   }
 
   return SUCCEEDED;
@@ skipping 436 matching lines @@
 struct LoadEliminationPhase {
   static const char* phase_name() { return "load elimination"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
     JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
     BranchElimination branch_condition_elimination(&graph_reducer,
                                                    data->jsgraph(), temp_zone);
     DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
                                               data->common());
     RedundancyElimination redundancy_elimination(&graph_reducer, temp_zone);
-    LoadElimination load_elimination(&graph_reducer, data->jsgraph(),
-                                     temp_zone);
+    LoadElimination load_elimination(&graph_reducer, temp_zone);
     ValueNumberingReducer value_numbering(temp_zone, data->graph()->zone());
     CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
                                          data->common(), data->machine());
     AddReducer(data, &graph_reducer, &branch_condition_elimination);
     AddReducer(data, &graph_reducer, &dead_code_elimination);
     AddReducer(data, &graph_reducer, &redundancy_elimination);
     AddReducer(data, &graph_reducer, &load_elimination);
     AddReducer(data, &graph_reducer, &value_numbering);
     AddReducer(data, &graph_reducer, &common_reducer);
     graph_reducer.ReduceGraph();
@@ skipping 805 matching lines @@
   data->DeleteRegisterAllocationZone();
 }
 
 CompilationInfo* PipelineImpl::info() const { return data_->info(); }
 
 Isolate* PipelineImpl::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8