[cleanup] CSA: add helpers for accessing details/value via key_index

src/builtins/builtins-handler.cc

 // Copyright 2016 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/builtins/builtins-utils.h"
 #include "src/builtins/builtins.h"
 #include "src/code-stub-assembler.h"
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
 #include "src/ic/keyed-store-generic.h"
@@ skipping 168 matching lines @@
 
   Label slow(this);
   {
     Node* properties = LoadProperties(receiver);
     Variable var_name_index(this, MachineType::PointerRepresentation());
     Label found(this, &var_name_index);
     NameDictionaryLookup<NameDictionary>(properties, name, &found,
                                          &var_name_index, &slow);
     Bind(&found);
     {
-      const int kNameToDetailsOffset = (NameDictionary::kEntryDetailsIndex -
-                                        NameDictionary::kEntryKeyIndex) *
-                                       kPointerSize;
-      Node* details = LoadFixedArrayElement(properties, var_name_index.value(),
-                                            kNameToDetailsOffset);
+      Node* details = LoadDetailsForKeyIndex<NameDictionary>(
+          properties, var_name_index.value());
       // Check that the property is a writable data property (no accessor).
       const int kTypeAndReadOnlyMask = PropertyDetails::KindField::kMask |
                                        PropertyDetails::kAttributesReadOnlyMask;
       STATIC_ASSERT(kData == 0);
-      GotoIf(IsSetSmi(details, kTypeAndReadOnlyMask), &slow);
-      const int kNameToValueOffset =
-          (NameDictionary::kEntryValueIndex - NameDictionary::kEntryKeyIndex) *
-          kPointerSize;
-      StoreFixedArrayElement(properties, var_name_index.value(), value,
-                             UPDATE_WRITE_BARRIER, kNameToValueOffset);
+      GotoIf(IsSetWord32(details, kTypeAndReadOnlyMask), &slow);
+      StoreValueForKeyIndex<NameDictionary>(properties, var_name_index.value(),
+                                            value);
       Return(value);
     }
   }
 
   Bind(&slow);
   TailCallRuntime(Runtime::kStoreIC_Miss, context, value, slot, vector,
                   receiver, name);
 }
 
 void Builtins::Generate_StoreIC_Setter_ForDeopt(MacroAssembler* masm) {
   NamedStoreHandlerCompiler::GenerateStoreViaSetterForDeopt(masm);
 }
 
 }  // namespace internal
 }  // namespace v8