[turbofan] Add support for special JSArrayBufferView accessors.

src/objects-inl.h

 // 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 4846 matching lines @@
   InstanceType type = instance_type();
   return FIRST_JS_PROXY_TYPE <= type && type <= LAST_JS_PROXY_TYPE;
 }
 bool Map::IsJSGlobalProxyMap() {
   return instance_type() == JS_GLOBAL_PROXY_TYPE;
 }
 bool Map::IsJSGlobalObjectMap() {
   return instance_type() == JS_GLOBAL_OBJECT_TYPE;
 }
 bool Map::IsJSTypedArrayMap() { return instance_type() == JS_TYPED_ARRAY_TYPE; }
+bool Map::IsJSDataViewMap() { return instance_type() == JS_DATA_VIEW_TYPE; }
 
 
 bool Map::CanOmitMapChecks() {
   return is_stable() && FLAG_omit_map_checks_for_leaf_maps;
 }
 
 
 int DependentCode::number_of_entries(DependencyGroup group) {
   if (length() == 0) return 0;
   return Smi::cast(get(group))->value();
@@ skipping 3004 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_