Await always waits

runtime/vm/object.cc

 // Copyright (c) 2012, 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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 1439 matching lines @@
   field_name = Symbols::New("cid"#clazz);                                      \
   field = Field::New(field_name, true, false, true, false, cls, 0);            \
   value = Smi::New(k##clazz##Cid);                                             \
   field.set_value(value);                                                      \
   field.set_type(Type::Handle(Type::IntType()));                               \
   cls.AddField(field);                                                         \
 
   CLASS_LIST_WITH_NULL(ADD_SET_FIELD)
 #undef ADD_SET_FIELD
 
+  object_store->InitAsyncObjects();
+
   return Error::null();
 }
 
 
 void Object::InitFromSnapshot(Isolate* isolate) {
   TIMERSCOPE(isolate, time_bootstrap);
   ObjectStore* object_store = isolate->object_store();
 
   Class& cls = Class::Handle();
 
@@ skipping 4021 matching lines @@
 
 bool Function::IsOptimizable() const {
   if (FLAG_coverage_dir != NULL) {
     // Do not optimize if collecting coverage data.
     return false;
   }
   if (is_native()) {
     // Native methods don't need to be optimized.
     return false;
   }
+  if (is_async_closure()) {
+    // TODO(hausner|fschneider): A suspected bug in the load elimination
+    // optimizer causes some async closures to fail. Until that bug is
+    // fixed, do not optimize async closures.
+    return false;
+  }
   if (is_optimizable() && (script() != Script::null()) &&
       ((end_token_pos() - token_pos()) < FLAG_huge_method_cutoff_in_tokens)) {
     // Additional check needed for implicit getters.
     if (HasCode() &&
        (Code::Handle(unoptimized_code()).Size() >=
         FLAG_huge_method_cutoff_in_code_size)) {
       return false;
     } else {
       return true;
     }
@@ skipping 14754 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart