[stubs] Port LoadScriptContextFieldStub and StoreScriptContextFieldStub to TurboFan.

src/code-stubs-hydrogen.cc

 // Copyright 2012 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/code-stubs.h"
 
 #include <memory>
 
 #include "src/bailout-reason.h"
 #include "src/crankshaft/hydrogen.h"
@@ skipping 400 matching lines @@
   checker.End();
 
   return environment()->Pop();
 }
 
 
 Handle<Code> FastCloneShallowArrayStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
-template <>
-HValue* CodeStubGraphBuilder<LoadScriptContextFieldStub>::BuildCodeStub() {
-  int context_index = casted_stub()->context_index();
-  int slot_index = casted_stub()->slot_index();
-
-  HValue* script_context = BuildGetScriptContext(context_index);
-  return Add<HLoadNamedField>(script_context, nullptr,
-                              HObjectAccess::ForContextSlot(slot_index));
-}
-
-
-Handle<Code> LoadScriptContextFieldStub::GenerateCode() {
-  return DoGenerateCode(this);
-}
-
-
-template <>
-HValue* CodeStubGraphBuilder<StoreScriptContextFieldStub>::BuildCodeStub() {
-  int context_index = casted_stub()->context_index();
-  int slot_index = casted_stub()->slot_index();
-
-  HValue* script_context = BuildGetScriptContext(context_index);
-  Add<HStoreNamedField>(script_context,
-                        HObjectAccess::ForContextSlot(slot_index),
-                        GetParameter(2), STORE_TO_INITIALIZED_ENTRY);
-  // TODO(ishell): Remove this unused stub.
-  return GetParameter(2);
-}
-
-
-Handle<Code> StoreScriptContextFieldStub::GenerateCode() {
-  return DoGenerateCode(this);
-}
-
 HValue* CodeStubGraphBuilderBase::BuildPushElement(HValue* object, HValue* argc,
                                                    HValue* argument_elements,
                                                    ElementsKind kind) {
   // Precheck whether all elements fit into the array.
   if (!IsFastObjectElementsKind(kind)) {
     LoopBuilder builder(this, context(), LoopBuilder::kPostIncrement);
     HValue* start = graph()->GetConstant0();
     HValue* key = builder.BeginBody(start, argc, Token::LT);
     {
       HInstruction* argument =
@@ skipping 1221 matching lines @@
   return Pop();
 }
 
 
 Handle<Code> KeyedLoadGenericStub::GenerateCode() {
   return DoGenerateCode(this);
 }
 
 }  // namespace internal
 }  // namespace v8