- Avoid deep recursions when executing type tests.

runtime/vm/object.h

 // 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 1113 matching lines @@
   // Allocate an instance class which has a VM implementation.
   template <class FakeInstance> static RawClass* New(intptr_t id);
 
   // Check the subtype or 'more specific' relationship.
   bool TypeTest(TypeTestKind test_kind,
                 const AbstractTypeArguments& type_arguments,
                 const Class& other,
                 const AbstractTypeArguments& other_type_arguments,
                 Error* bound_error) const;
 
+  static bool TypeTestNonRecursive(
+      const Class& cls,
+      TypeTestKind test_kind,
+      const AbstractTypeArguments& type_arguments,
+      const Class& other,
+      const AbstractTypeArguments& other_type_arguments,
+      Error* bound_error);
+
   FINAL_HEAP_OBJECT_IMPLEMENTATION(Class, Object);
   friend class AbstractType;
   friend class Instance;
   friend class Object;
   friend class Type;
 };
 
 
 // Unresolved class is used for storing unresolved names which will be resolved
 // to a class after all classes have been loaded and finalized.
@@ skipping 5229 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_