Support loads from primitive values.

src/accessors.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 73 matching lines @@
                                    int offset,
                                    int* object_offset) {
   if (name->Equals(property_name)) {
     *object_offset = offset;
     return true;
   }
   return false;
 }
 
 
-bool Accessors::IsJSObjectFieldAccessor(
-      Handle<Map> map, Handle<String> name,
-      int* object_offset) {
-  Isolate* isolate = map->GetIsolate();
+bool Accessors::IsJSObjectFieldAccessor(Handle<HeapType> type,
+                                        Handle<String> name,
+                                        int* object_offset) {
+  Isolate* isolate = name->GetIsolate();
+
+  if (type->Is(HeapType::String())) {
+    return CheckForName(name, isolate->heap()->length_string(),
+                        String::kLengthOffset, object_offset);
+  }
+
+  if (!type->IsClass()) return false;
+  Handle<Map> map = type->AsClass();
+
   switch (map->instance_type()) {
     case JS_ARRAY_TYPE:
       return
         CheckForName(name, isolate->heap()->length_string(),
                      JSArray::kLengthOffset, object_offset);
     case JS_TYPED_ARRAY_TYPE:
       return
         CheckForName(name, isolate->heap()->length_string(),
                      JSTypedArray::kLengthOffset, object_offset) ||
         CheckForName(name, isolate->heap()->byte_length_string(),
                      JSTypedArray::kByteLengthOffset, object_offset) ||
         CheckForName(name, isolate->heap()->byte_offset_string(),
                      JSTypedArray::kByteOffsetOffset, object_offset) ||
         CheckForName(name, isolate->heap()->buffer_string(),
                      JSTypedArray::kBufferOffset, object_offset);
     case JS_ARRAY_BUFFER_TYPE:
       return
         CheckForName(name, isolate->heap()->byte_length_string(),
                      JSArrayBuffer::kByteLengthOffset, object_offset);
     case JS_DATA_VIEW_TYPE:
       return
         CheckForName(name, isolate->heap()->byte_length_string(),
                      JSDataView::kByteLengthOffset, object_offset) ||
         CheckForName(name, isolate->heap()->byte_offset_string(),
                      JSDataView::kByteOffsetOffset, object_offset) ||
         CheckForName(name, isolate->heap()->buffer_string(),
                      JSDataView::kBufferOffset, object_offset);
-    default: {
-      if (map->instance_type() < FIRST_NONSTRING_TYPE) {
-        return
-          CheckForName(name, isolate->heap()->length_string(),
-                       String::kLengthOffset, object_offset);
-      }
+    default:
       return false;
-    }
   }
 }
 
 
 //
 // Accessors::ArrayLength
 //
 
 
 MaybeObject* Accessors::ArrayGetLength(Isolate* isolate,
@@ skipping 827 matching lines @@
   info->set_data(Smi::FromInt(index));
   Handle<Object> getter = v8::FromCData(isolate, &ModuleGetExport);
   Handle<Object> setter = v8::FromCData(isolate, &ModuleSetExport);
   info->set_getter(*getter);
   if (!(attributes & ReadOnly)) info->set_setter(*setter);
   return info;
 }
 
 
 } }  // namespace v8::internal