Create and cache method extraction stub in the ICData.

runtime/vm/raw_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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 522 matching lines @@
   enum Kind {
     kRegularFunction,
     kClosureFunction,
     kSignatureFunction,  // represents a signature only without actual code.
     kGetterFunction,     // represents getter functions e.g: get foo() { .. }.
     kSetterFunction,     // represents setter functions e.g: set foo(..) { .. }.
     kConstructor,
     kImplicitGetter,     // represents an implicit getter for fields.
     kImplicitSetter,     // represents an implicit setter for fields.
     kConstImplicitGetter,  // represents an implicit const getter for fields.
+    kMethodExtractor,  // converts method into implicit closure on the receiver.
   };
 
  private:
   RAW_HEAP_OBJECT_IMPLEMENTATION(Function);
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;
   RawObject* owner_;  // Class or  patch class where this function was defined.
   RawAbstractType* result_type_;
   RawArray* parameter_types_;
@@ skipping 24 matching lines @@
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->context_scope_);
   }
   RawContextScope* context_scope_;
   RawFunction* parent_function_;  // Enclosing function of this local function.
   RawClass* signature_class_;
   union {
     RawInstance* closure_;  // Closure object for static implicit closures.
     RawCode* closure_allocation_stub_;  // Stub code for allocation of closures.
   };
+  RawFunction* method_extractor_;  // Stub code for method extraction.
   RawObject** to() {
-    return reinterpret_cast<RawObject**>(&ptr()->closure_allocation_stub_);
+    return reinterpret_cast<RawObject**>(&ptr()->method_extractor_);
   }
 };
 
 
 class RawRedirectionData : public RawObject {
  private:
   RAW_HEAP_OBJECT_IMPLEMENTATION(RedirectionData);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->type_);
@@ skipping 1089 matching lines @@
          kExternalUint64ArrayCid == kExternalInt8ArrayCid + 8 &&
          kExternalFloat32ArrayCid == kExternalInt8ArrayCid + 9 &&
          kExternalFloat64ArrayCid == kExternalInt8ArrayCid + 10 &&
          kStacktraceCid == kExternalInt8ArrayCid + 11);
   return (index >= kExternalInt8ArrayCid && index <= kExternalFloat64ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_