Create and cache method extraction stub in the ICData.

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 1138 matching lines @@
   // Signature class of this closure function or signature function.
   RawClass* signature_class() const;
   void set_signature_class(const Class& value) const;
 
   RawInstance* implicit_static_closure() const;
   void set_implicit_static_closure(const Instance& closure) const;
 
   RawCode* closure_allocation_stub() const;
   void set_closure_allocation_stub(const Code& value) const;
 
+  RawFunction* method_extractor() const;
+  void set_method_extractor(const Function& value) const;
+
+  void set_extracted_method_closure(const Function& function) const;
+  RawFunction* extracted_method_closure() const;
+
+  bool IsMethodExtractor() const {
+    return kind() == RawFunction::kMethodExtractor;
+  }
+
   // Returns true iff an implicit closure function has been created
   // for this function.
   bool HasImplicitClosureFunction() const {
     return implicit_closure_function() != null();
   }
 
   // Return the closure function implicitly created for this function.
   // If none exists yet, create one and remember it.
   RawFunction* ImplicitClosureFunction() const;
 
@@ skipping 396 matching lines @@
   RawInstance* implicit_static_closure() const {
     return raw_ptr()->closure_;
   }
   void set_implicit_static_closure(const Instance& closure) const;
 
   RawCode* closure_allocation_stub() const {
     return raw_ptr()->closure_allocation_stub_;
   }
   void set_closure_allocation_stub(const Code& value) const;
 
+  RawFunction* method_extractor() const {
+    return raw_ptr()->method_extractor_;
+  }
+  void set_method_extractor(const Function& value) const;
+
   static RawClosureData* New();
 
   HEAP_OBJECT_IMPLEMENTATION(ClosureData, Object);
   friend class Class;
   friend class Function;
   friend class HeapProfiler;
 };
 
 
 class RedirectionData: public Object {
@@ skipping 4612 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_