Massive renaming of PropertyType values and other implied stuff.

src/bootstrapper.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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/code-stubs.h"
 #include "src/extensions/externalize-string-extension.h"
 #include "src/extensions/free-buffer-extension.h"
@@ skipping 400 matching lines @@
     Handle<Map> map, FunctionMode function_mode) {
   int size = IsFunctionModeWithPrototype(function_mode) ? 5 : 4;
   Map::EnsureDescriptorSlack(map, size);
 
   PropertyAttributes attribs = static_cast<PropertyAttributes>(
       DONT_ENUM | DONT_DELETE | READ_ONLY);
 
   Handle<AccessorInfo> length =
       Accessors::FunctionLengthInfo(isolate(), attribs);
   {  // Add length.
-    CallbacksDescriptor d(Handle<Name>(Name::cast(length->name())),
-                          length, attribs);
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(length->name())),
+                                 length, attribs);
     map->AppendDescriptor(&d);
   }
   Handle<AccessorInfo> name =
       Accessors::FunctionNameInfo(isolate(), attribs);
   {  // Add name.
-    CallbacksDescriptor d(Handle<Name>(Name::cast(name->name())),
-                          name, attribs);
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(name->name())), name,
+                                 attribs);
     map->AppendDescriptor(&d);
   }
   Handle<AccessorInfo> args =
       Accessors::FunctionArgumentsInfo(isolate(), attribs);
   {  // Add arguments.
-    CallbacksDescriptor d(Handle<Name>(Name::cast(args->name())),
-                          args, attribs);
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(args->name())), args,
+                                 attribs);
     map->AppendDescriptor(&d);
   }
   Handle<AccessorInfo> caller =
       Accessors::FunctionCallerInfo(isolate(), attribs);
   {  // Add caller.
-    CallbacksDescriptor d(Handle<Name>(Name::cast(caller->name())),
-                          caller, attribs);
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(caller->name())),
+                                 caller, attribs);
     map->AppendDescriptor(&d);
   }
   if (IsFunctionModeWithPrototype(function_mode)) {
     if (function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE) {
       attribs = static_cast<PropertyAttributes>(attribs & ~READ_ONLY);
     }
     Handle<AccessorInfo> prototype =
         Accessors::FunctionPrototypeInfo(isolate(), attribs);
-    CallbacksDescriptor d(Handle<Name>(Name::cast(prototype->name())),
-                          prototype, attribs);
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(prototype->name())),
+                                 prototype, attribs);
     map->AppendDescriptor(&d);
   }
 }
 
 
 Handle<Map> Genesis::CreateFunctionMap(FunctionMode function_mode) {
   Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
   SetFunctionInstanceDescriptor(map, function_mode);
   map->set_function_with_prototype(IsFunctionModeWithPrototype(function_mode));
   return map;
@@ skipping 103 matching lines @@
   Handle<AccessorPair> arguments(factory()->NewAccessorPair());
   Handle<AccessorPair> caller(factory()->NewAccessorPair());
   PropertyAttributes rw_attribs =
       static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE);
   PropertyAttributes ro_attribs =
       static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
 
   // Add length.
   if (function_mode == BOUND_FUNCTION) {
     Handle<String> length_string = isolate()->factory()->length_string();
-    FieldDescriptor d(length_string, 0, ro_attribs, Representation::Tagged());
+    DataDescriptor d(length_string, 0, ro_attribs, Representation::Tagged());
     map->AppendDescriptor(&d);
   } else {
     DCHECK(function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE ||
            function_mode == FUNCTION_WITH_READONLY_PROTOTYPE ||
            function_mode == FUNCTION_WITHOUT_PROTOTYPE);
     Handle<AccessorInfo> length =
         Accessors::FunctionLengthInfo(isolate(), ro_attribs);
-    CallbacksDescriptor d(Handle<Name>(Name::cast(length->name())),
-                          length, ro_attribs);
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(length->name())),
+                                 length, ro_attribs);
     map->AppendDescriptor(&d);
   }
   Handle<AccessorInfo> name =
       Accessors::FunctionNameInfo(isolate(), ro_attribs);
   {  // Add name.
-    CallbacksDescriptor d(Handle<Name>(Name::cast(name->name())),
-                          name, ro_attribs);
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(name->name())), name,
+                                 ro_attribs);
     map->AppendDescriptor(&d);
   }
   {  // Add arguments.
-    CallbacksDescriptor d(factory()->arguments_string(), arguments,
-                          rw_attribs);
+    AccessorConstantDescriptor d(factory()->arguments_string(), arguments,
+                                 rw_attribs);
     map->AppendDescriptor(&d);
   }
   {  // Add caller.
-    CallbacksDescriptor d(factory()->caller_string(), caller, rw_attribs);
+    AccessorConstantDescriptor d(factory()->caller_string(), caller,
+                                 rw_attribs);
     map->AppendDescriptor(&d);
   }
   if (IsFunctionModeWithPrototype(function_mode)) {
     // Add prototype.
     PropertyAttributes attribs =
         function_mode == FUNCTION_WITH_WRITEABLE_PROTOTYPE ? rw_attribs
                                                            : ro_attribs;
     Handle<AccessorInfo> prototype =
         Accessors::FunctionPrototypeInfo(isolate(), attribs);
-    CallbacksDescriptor d(Handle<Name>(Name::cast(prototype->name())),
-                          prototype, attribs);
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(prototype->name())),
+                                 prototype, attribs);
     map->AppendDescriptor(&d);
   }
 }
 
 
 // ECMAScript 5th Edition, 13.2.3
 Handle<JSFunction> Genesis::GetStrictPoisonFunction() {
   if (strict_poison_function.is_null()) {
     Handle<String> name = factory()->InternalizeOneByteString(
         STATIC_CHAR_VECTOR("ThrowTypeError"));
@@ skipping 78 matching lines @@
   accessors->set_setter(*func);
 }
 
 
 static void ReplaceAccessors(Handle<Map> map,
                              Handle<String> name,
                              PropertyAttributes attributes,
                              Handle<AccessorPair> accessor_pair) {
   DescriptorArray* descriptors = map->instance_descriptors();
   int idx = descriptors->SearchWithCache(*name, *map);
-  CallbacksDescriptor descriptor(name, accessor_pair, attributes);
+  AccessorConstantDescriptor descriptor(name, accessor_pair, attributes);
   descriptors->Replace(idx, &descriptor);
 }
 
 
 void Genesis::PoisonArgumentsAndCaller(Handle<Map> map) {
   SetAccessors(map, factory()->arguments_string(), GetStrictPoisonFunction());
   SetAccessors(map, factory()->caller_string(), GetStrictPoisonFunction());
 }
 
 
@@ skipping 219 matching lines @@
     // HGraphBuilder::JSArrayBuilder::EmitMapCode()
     DCHECK(initial_map->elements_kind() == GetInitialFastElementsKind());
     Map::EnsureDescriptorSlack(initial_map, 1);
 
     PropertyAttributes attribs = static_cast<PropertyAttributes>(
         DONT_ENUM | DONT_DELETE);
 
     Handle<AccessorInfo> array_length =
         Accessors::ArrayLengthInfo(isolate, attribs);
     {  // Add length.
-      CallbacksDescriptor d(
-          Handle<Name>(Name::cast(array_length->name())),
-          array_length, attribs);
+      AccessorConstantDescriptor d(
+          Handle<Name>(Name::cast(array_length->name())), array_length,
+          attribs);
       initial_map->AppendDescriptor(&d);
     }
 
     // array_function is used internally. JS code creating array object should
     // search for the 'Array' property on the global object and use that one
     // as the constructor. 'Array' property on a global object can be
     // overwritten by JS code.
     native_context()->set_array_function(*array_function);
 
     // Cache the array maps, needed by ArrayConstructorStub
@@ skipping 31 matching lines @@
     Handle<Map> string_map =
         Handle<Map>(native_context()->string_function()->initial_map());
     Map::EnsureDescriptorSlack(string_map, 1);
 
     PropertyAttributes attribs = static_cast<PropertyAttributes>(
         DONT_ENUM | DONT_DELETE | READ_ONLY);
     Handle<AccessorInfo> string_length(
         Accessors::StringLengthInfo(isolate, attribs));
 
     {  // Add length.
-      CallbacksDescriptor d(factory->length_string(), string_length, attribs);
+      AccessorConstantDescriptor d(factory->length_string(), string_length,
+                                   attribs);
       string_map->AppendDescriptor(&d);
     }
   }
 
   {
     // --- S y m b o l ---
     Handle<JSFunction> symbol_fun = InstallFunction(
         global, "Symbol", JS_VALUE_TYPE, JSValue::kSize,
         isolate->initial_object_prototype(), Builtins::kIllegal);
     native_context()->set_symbol_function(*symbol_fun);
@@ skipping 24 matching lines @@
     DCHECK_EQ(0, initial_map->inobject_properties());
 
     PropertyAttributes final =
         static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
     Map::EnsureDescriptorSlack(initial_map, 5);
 
     {
       // ECMA-262, section 15.10.7.1.
       Handle<AccessorInfo> regexp_source(
           Accessors::RegExpSourceInfo(isolate, final));
-      CallbacksDescriptor d(factory->source_string(), regexp_source, final);
+      AccessorConstantDescriptor d(factory->source_string(), regexp_source,
+                                   final);
       initial_map->AppendDescriptor(&d);
     }
     {
       // ECMA-262, section 15.10.7.2.
-      FieldDescriptor field(factory->global_string(),
-                            JSRegExp::kGlobalFieldIndex,
-                            final,
-                            Representation::Tagged());
+      DataDescriptor field(factory->global_string(),
+                           JSRegExp::kGlobalFieldIndex, final,
+                           Representation::Tagged());
       initial_map->AppendDescriptor(&field);
     }
     {
       // ECMA-262, section 15.10.7.3.
-      FieldDescriptor field(factory->ignore_case_string(),
-                            JSRegExp::kIgnoreCaseFieldIndex,
-                            final,
-                            Representation::Tagged());
+      DataDescriptor field(factory->ignore_case_string(),
+                           JSRegExp::kIgnoreCaseFieldIndex, final,
+                           Representation::Tagged());
       initial_map->AppendDescriptor(&field);
     }
     {
       // ECMA-262, section 15.10.7.4.
-      FieldDescriptor field(factory->multiline_string(),
-                            JSRegExp::kMultilineFieldIndex,
-                            final,
-                            Representation::Tagged());
+      DataDescriptor field(factory->multiline_string(),
+                           JSRegExp::kMultilineFieldIndex, final,
+                           Representation::Tagged());
       initial_map->AppendDescriptor(&field);
     }
     {
       // ECMA-262, section 15.10.7.5.
       PropertyAttributes writable =
           static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE);
-      FieldDescriptor field(factory->last_index_string(),
-                            JSRegExp::kLastIndexFieldIndex,
-                            writable,
-                            Representation::Tagged());
+      DataDescriptor field(factory->last_index_string(),
+                           JSRegExp::kLastIndexFieldIndex, writable,
+                           Representation::Tagged());
       initial_map->AppendDescriptor(&field);
     }
 
     static const int num_fields = JSRegExp::kInObjectFieldCount;
     initial_map->set_inobject_properties(num_fields);
     initial_map->set_pre_allocated_property_fields(num_fields);
     initial_map->set_unused_property_fields(0);
     initial_map->set_instance_size(initial_map->instance_size() +
                                    num_fields * kPointerSize);
 
@@ skipping 76 matching lines @@
     Handle<JSFunction> object_function(native_context()->object_function());
     Handle<Map> iterator_result_map =
         Map::Create(isolate, JSGeneratorObject::kResultPropertyCount);
     DCHECK_EQ(JSGeneratorObject::kResultSize,
               iterator_result_map->instance_size());
     DCHECK_EQ(JSGeneratorObject::kResultPropertyCount,
               iterator_result_map->inobject_properties());
     Map::EnsureDescriptorSlack(iterator_result_map,
                                JSGeneratorObject::kResultPropertyCount);
 
-    FieldDescriptor value_descr(factory->value_string(),
-                                JSGeneratorObject::kResultValuePropertyIndex,
-                                NONE, Representation::Tagged());
+    DataDescriptor value_descr(factory->value_string(),
+                               JSGeneratorObject::kResultValuePropertyIndex,
+                               NONE, Representation::Tagged());
     iterator_result_map->AppendDescriptor(&value_descr);
 
-    FieldDescriptor done_descr(factory->done_string(),
-                               JSGeneratorObject::kResultDonePropertyIndex,
-                               NONE, Representation::Tagged());
+    DataDescriptor done_descr(factory->done_string(),
+                              JSGeneratorObject::kResultDonePropertyIndex, NONE,
+                              Representation::Tagged());
     iterator_result_map->AppendDescriptor(&done_descr);
 
     iterator_result_map->set_unused_property_fields(0);
     iterator_result_map->set_pre_allocated_property_fields(
         JSGeneratorObject::kResultPropertyCount);
     DCHECK_EQ(JSGeneratorObject::kResultSize,
               iterator_result_map->instance_size());
     native_context()->set_iterator_result_map(*iterator_result_map);
   }
 
@@ skipping 13 matching lines @@
     Handle<JSFunction> function = factory->NewFunctionWithoutPrototype(
         arguments_string, code);
     function->shared()->set_instance_class_name(*arguments_string);
 
     Handle<Map> map =
         factory->NewMap(JS_OBJECT_TYPE, Heap::kSloppyArgumentsObjectSize);
     // Create the descriptor array for the arguments object.
     Map::EnsureDescriptorSlack(map, 2);
 
     {  // length
-      FieldDescriptor d(factory->length_string(), Heap::kArgumentsLengthIndex,
-                        DONT_ENUM, Representation::Tagged());
+      DataDescriptor d(factory->length_string(), Heap::kArgumentsLengthIndex,
+                       DONT_ENUM, Representation::Tagged());
       map->AppendDescriptor(&d);
     }
     {  // callee
-      FieldDescriptor d(factory->callee_string(), Heap::kArgumentsCalleeIndex,
-                        DONT_ENUM, Representation::Tagged());
+      DataDescriptor d(factory->callee_string(), Heap::kArgumentsCalleeIndex,
+                       DONT_ENUM, Representation::Tagged());
       map->AppendDescriptor(&d);
     }
     // @@iterator method is added later.
 
     map->set_function_with_prototype(true);
     map->set_pre_allocated_property_fields(2);
     map->set_inobject_properties(2);
     native_context()->set_sloppy_arguments_map(*map);
 
     DCHECK(!function->has_initial_map());
@@ skipping 30 matching lines @@
     caller->set_getter(*poison);
     caller->set_setter(*poison);
 
     // Create the map. Allocate one in-object field for length.
     Handle<Map> map = factory->NewMap(JS_OBJECT_TYPE,
                                       Heap::kStrictArgumentsObjectSize);
     // Create the descriptor array for the arguments object.
     Map::EnsureDescriptorSlack(map, 3);
 
     {  // length
-      FieldDescriptor d(factory->length_string(), Heap::kArgumentsLengthIndex,
-                        DONT_ENUM, Representation::Tagged());
+      DataDescriptor d(factory->length_string(), Heap::kArgumentsLengthIndex,
+                       DONT_ENUM, Representation::Tagged());
       map->AppendDescriptor(&d);
     }
     {  // callee
-      CallbacksDescriptor d(factory->callee_string(), callee, attributes);
+      AccessorConstantDescriptor d(factory->callee_string(), callee,
+                                   attributes);
       map->AppendDescriptor(&d);
     }
     {  // caller
-      CallbacksDescriptor d(factory->caller_string(), caller, attributes);
+      AccessorConstantDescriptor d(factory->caller_string(), caller,
+                                   attributes);
       map->AppendDescriptor(&d);
     }
     // @@iterator method is added later.
 
     map->set_function_with_prototype(true);
     DCHECK_EQ(native_context()->object_function()->prototype(),
               *isolate->initial_object_prototype());
     map->SetPrototype(isolate->initial_object_prototype());
     map->set_pre_allocated_property_fields(1);
     map->set_inobject_properties(1);
@@ skipping 379 matching lines @@
 
   // Make "length" magic on instances.
   Map::EnsureDescriptorSlack(initial_map, 1);
 
   PropertyAttributes attribs = static_cast<PropertyAttributes>(
       DONT_ENUM | DONT_DELETE);
 
   Handle<AccessorInfo> array_length =
       Accessors::ArrayLengthInfo(isolate(), attribs);
   {  // Add length.
-    CallbacksDescriptor d(
-        Handle<Name>(Name::cast(array_length->name())), array_length, attribs);
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(array_length->name())),
+                                 array_length, attribs);
     initial_map->AppendDescriptor(&d);
   }
 
   return array_function;
 }
 
 
 bool Genesis::InstallNatives() {
   HandleScope scope(isolate());
 
@@ skipping 61 matching lines @@
 
     Handle<Map> script_map = Handle<Map>(script_fun->initial_map());
     Map::EnsureDescriptorSlack(script_map, 14);
 
     PropertyAttributes attribs =
         static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
 
     Handle<AccessorInfo> script_column =
         Accessors::ScriptColumnOffsetInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(Handle<Name>(Name::cast(script_column->name())),
-                           script_column, attribs);
+      AccessorConstantDescriptor d(
+          Handle<Name>(Name::cast(script_column->name())), script_column,
+          attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_id =
         Accessors::ScriptIdInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(Handle<Name>(Name::cast(script_id->name())),
-                            script_id, attribs);
+      AccessorConstantDescriptor d(Handle<Name>(Name::cast(script_id->name())),
+                                   script_id, attribs);
       script_map->AppendDescriptor(&d);
     }
 
 
     Handle<AccessorInfo> script_name =
         Accessors::ScriptNameInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(Handle<Name>(Name::cast(script_name->name())),
-                            script_name, attribs);
+      AccessorConstantDescriptor d(
+          Handle<Name>(Name::cast(script_name->name())), script_name, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_line =
         Accessors::ScriptLineOffsetInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(Handle<Name>(Name::cast(script_line->name())),
-                           script_line, attribs);
+      AccessorConstantDescriptor d(
+          Handle<Name>(Name::cast(script_line->name())), script_line, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_source =
         Accessors::ScriptSourceInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(Handle<Name>(Name::cast(script_source->name())),
-                            script_source, attribs);
+      AccessorConstantDescriptor d(
+          Handle<Name>(Name::cast(script_source->name())), script_source,
+          attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_type =
         Accessors::ScriptTypeInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(Handle<Name>(Name::cast(script_type->name())),
-                            script_type, attribs);
+      AccessorConstantDescriptor d(
+          Handle<Name>(Name::cast(script_type->name())), script_type, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_compilation_type =
         Accessors::ScriptCompilationTypeInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(
+      AccessorConstantDescriptor d(
           Handle<Name>(Name::cast(script_compilation_type->name())),
           script_compilation_type, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_line_ends =
         Accessors::ScriptLineEndsInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(Handle<Name>(Name::cast(script_line_ends->name())),
-                            script_line_ends, attribs);
+      AccessorConstantDescriptor d(
+          Handle<Name>(Name::cast(script_line_ends->name())), script_line_ends,
+          attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_context_data =
         Accessors::ScriptContextDataInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(
+      AccessorConstantDescriptor d(
           Handle<Name>(Name::cast(script_context_data->name())),
           script_context_data, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_eval_from_script =
         Accessors::ScriptEvalFromScriptInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(
+      AccessorConstantDescriptor d(
           Handle<Name>(Name::cast(script_eval_from_script->name())),
           script_eval_from_script, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_eval_from_script_position =
         Accessors::ScriptEvalFromScriptPositionInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(
+      AccessorConstantDescriptor d(
           Handle<Name>(Name::cast(script_eval_from_script_position->name())),
           script_eval_from_script_position, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_eval_from_function_name =
         Accessors::ScriptEvalFromFunctionNameInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(
+      AccessorConstantDescriptor d(
           Handle<Name>(Name::cast(script_eval_from_function_name->name())),
           script_eval_from_function_name, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_source_url =
         Accessors::ScriptSourceUrlInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(Handle<Name>(Name::cast(script_source_url->name())),
-                            script_source_url, attribs);
+      AccessorConstantDescriptor d(
+          Handle<Name>(Name::cast(script_source_url->name())),
+          script_source_url, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     Handle<AccessorInfo> script_source_mapping_url =
         Accessors::ScriptSourceMappingUrlInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(
+      AccessorConstantDescriptor d(
           Handle<Name>(Name::cast(script_source_mapping_url->name())),
           script_source_mapping_url, attribs);
       script_map->AppendDescriptor(&d);
     }
 
     // Allocate the empty script.
     Handle<Script> script = factory()->NewScript(factory()->empty_string());
     script->set_type(Smi::FromInt(Script::TYPE_NATIVE));
     heap()->public_set_empty_script(*script);
   }
@@ skipping 204 matching lines @@
     Map::EnsureDescriptorSlack(initial_map, 3);
 
     {
       JSFunction* array_function = native_context()->array_function();
       Handle<DescriptorArray> array_descriptors(
           array_function->initial_map()->instance_descriptors());
       Handle<String> length = factory()->length_string();
       int old = array_descriptors->SearchWithCache(
           *length, array_function->initial_map());
       DCHECK(old != DescriptorArray::kNotFound);
-      CallbacksDescriptor desc(length,
-                               handle(array_descriptors->GetValue(old),
-                                      isolate()),
-                               array_descriptors->GetDetails(old).attributes());
+      AccessorConstantDescriptor desc(
+          length, handle(array_descriptors->GetValue(old), isolate()),
+          array_descriptors->GetDetails(old).attributes());
       initial_map->AppendDescriptor(&desc);
     }
     {
-      FieldDescriptor index_field(factory()->index_string(),
-                                  JSRegExpResult::kIndexIndex,
-                                  NONE,
-                                  Representation::Tagged());
+      DataDescriptor index_field(factory()->index_string(),
+                                 JSRegExpResult::kIndexIndex, NONE,
+                                 Representation::Tagged());
       initial_map->AppendDescriptor(&index_field);
     }
 
     {
-      FieldDescriptor input_field(factory()->input_string(),
-                                  JSRegExpResult::kInputIndex,
-                                  NONE,
-                                  Representation::Tagged());
+      DataDescriptor input_field(factory()->input_string(),
+                                 JSRegExpResult::kInputIndex, NONE,
+                                 Representation::Tagged());
       initial_map->AppendDescriptor(&input_field);
     }
 
     initial_map->set_inobject_properties(2);
     initial_map->set_pre_allocated_property_fields(2);
     initial_map->set_unused_property_fields(0);
 
     native_context()->set_regexp_result_map(*initial_map);
   }
 
   // Add @@iterator method to the arguments object maps.
   {
     PropertyAttributes attribs = DONT_ENUM;
     Handle<AccessorInfo> arguments_iterator =
         Accessors::ArgumentsIteratorInfo(isolate(), attribs);
     {
-      CallbacksDescriptor d(factory()->iterator_symbol(), arguments_iterator,
-                            attribs);
+      AccessorConstantDescriptor d(factory()->iterator_symbol(),
+                                   arguments_iterator, attribs);
       Handle<Map> map(native_context()->sloppy_arguments_map());
       Map::EnsureDescriptorSlack(map, 1);
       map->AppendDescriptor(&d);
     }
     {
-      CallbacksDescriptor d(factory()->iterator_symbol(), arguments_iterator,
-                            attribs);
+      AccessorConstantDescriptor d(factory()->iterator_symbol(),
+                                   arguments_iterator, attribs);
       Handle<Map> map(native_context()->aliased_arguments_map());
       Map::EnsureDescriptorSlack(map, 1);
       map->AppendDescriptor(&d);
     }
     {
-      CallbacksDescriptor d(factory()->iterator_symbol(), arguments_iterator,
-                            attribs);
+      AccessorConstantDescriptor d(factory()->iterator_symbol(),
+                                   arguments_iterator, attribs);
       Handle<Map> map(native_context()->strict_arguments_map());
       Map::EnsureDescriptorSlack(map, 1);
       map->AppendDescriptor(&d);
     }
   }
 
 #ifdef VERIFY_HEAP
   builtins->ObjectVerify();
 #endif
 
@@ skipping 406 matching lines @@
   // it is likely due to both global objects sharing property name(s).
   // Merging those two global objects is impossible.
   // The global template must not create properties that already exist
   // in the snapshotted global object.
   if (from->HasFastProperties()) {
     Handle<DescriptorArray> descs =
         Handle<DescriptorArray>(from->map()->instance_descriptors());
     for (int i = 0; i < from->map()->NumberOfOwnDescriptors(); i++) {
       PropertyDetails details = descs->GetDetails(i);
       switch (details.type()) {
-        case FIELD: {
+        case DATA: {
           HandleScope inner(isolate());
           Handle<Name> key = Handle<Name>(descs->GetKey(i));
           FieldIndex index = FieldIndex::ForDescriptor(from->map(), i);
           DCHECK(!descs->GetDetails(i).representation().IsDouble());
           Handle<Object> value = Handle<Object>(from->RawFastPropertyAt(index),
                                                 isolate());
           JSObject::AddProperty(to, key, value, details.attributes());
           break;
         }
-        case CONSTANT: {
+        case DATA_CONSTANT: {
           HandleScope inner(isolate());
           Handle<Name> key = Handle<Name>(descs->GetKey(i));
           Handle<Object> constant(descs->GetConstant(i), isolate());
           JSObject::AddProperty(to, key, constant, details.attributes());
           break;
         }
-        case ACCESSOR_FIELD:
+        case ACCESSOR:
           UNREACHABLE();
-        case CALLBACKS: {
+        case ACCESSOR_CONSTANT: {
           Handle<Name> key(descs->GetKey(i));
           LookupIterator it(to, key, LookupIterator::OWN_SKIP_INTERCEPTOR);
           CHECK_NE(LookupIterator::ACCESS_CHECK, it.state());
           // If the property is already there we skip it
           if (it.IsFound()) continue;
           HandleScope inner(isolate());
           DCHECK(!to->HasFastProperties());
           // Add to dictionary.
           Handle<Object> callbacks(descs->GetCallbacksObject(i), isolate());
-          PropertyDetails d(details.attributes(), CALLBACKS, i + 1);
+          PropertyDetails d(details.attributes(), ACCESSOR_CONSTANT, i + 1);
           JSObject::SetNormalizedProperty(to, key, callbacks, d);
           break;
         }
       }
     }
   } else {
     Handle<NameDictionary> properties =
         Handle<NameDictionary>(from->property_dictionary());
     int capacity = properties->Capacity();
     for (int i = 0; i < capacity; i++) {
       Object* raw_key(properties->KeyAt(i));
       if (properties->IsKey(raw_key)) {
         DCHECK(raw_key->IsName());
         // If the property is already there we skip it.
         Handle<Name> key(Name::cast(raw_key));
         LookupIterator it(to, key, LookupIterator::OWN_SKIP_INTERCEPTOR);
         CHECK_NE(LookupIterator::ACCESS_CHECK, it.state());
         if (it.IsFound()) continue;
         // Set the property.
         Handle<Object> value = Handle<Object>(properties->ValueAt(i),
                                               isolate());
         DCHECK(!value->IsCell());
         if (value->IsPropertyCell()) {
           value = Handle<Object>(PropertyCell::cast(*value)->value(),
                                  isolate());
         }
         PropertyDetails details = properties->DetailsAt(i);
-        DCHECK_EQ(DATA, details.kind());
+        DCHECK_EQ(kData, details.kind());
         JSObject::AddProperty(to, key, value, details.attributes());
       }
     }
   }
 }
 
 
 void Genesis::TransferIndexedProperties(Handle<JSObject> from,
                                         Handle<JSObject> to) {
   // Cloning the elements array is sufficient.
@@ skipping 203 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 } }  // namespace v8::internal