Reland "Recognize and optimize a.runtimeType == b.runtimeType pattern."

runtime/vm/isolate.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/isolate.h"
 
 #include "include/dart_api.h"
 #include "include/dart_native_api.h"
 #include "platform/assert.h"
 #include "platform/text_buffer.h"
@@ skipping 759 matching lines @@
   object##_handle_(NULL),
 
 // TODO(srdjan): Some Isolate monitors can be shared. Replace their usage with
 // that shared monitor.
 Isolate::Isolate(const Dart_IsolateFlags& api_flags)
   :   store_buffer_(new StoreBuffer()),
       heap_(NULL),
       user_tag_(0),
       current_tag_(UserTag::null()),
       default_tag_(UserTag::null()),
+      object_store_(NULL),
       class_table_(),
       single_step_(false),
       thread_registry_(new ThreadRegistry()),
       safepoint_handler_(new SafepointHandler(this)),
       message_notify_callback_(NULL),
       name_(NULL),
       debugger_name_(NULL),
       start_time_(OS::GetCurrentTimeMicros()),
       main_port_(0),
       origin_id_(0),
       pause_capability_(0),
       terminate_capability_(0),
       errors_fatal_(true),
-      object_store_(NULL),
       top_exit_frame_info_(0),
       init_callback_data_(NULL),
       environment_callback_(NULL),
       library_tag_handler_(NULL),
       api_state_(NULL),
       debugger_(NULL),
       resume_request_(false),
       last_resume_timestamp_(OS::GetCurrentTimeMillis()),
       has_compiled_code_(false),
       random_(),
@@ skipping 2163 matching lines @@
 void IsolateSpawnState::DecrementSpawnCount() {
   ASSERT(spawn_count_monitor_ != NULL);
   ASSERT(spawn_count_ != NULL);
   MonitorLocker ml(spawn_count_monitor_);
   ASSERT(*spawn_count_ > 0);
   *spawn_count_ = *spawn_count_ - 1;
   ml.Notify();
 }
 
 }  // namespace dart