Sped up hashCode by removing megamorphic call to _identityHashCode.

runtime/vm/object_store.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_STORE_H_
 #define VM_OBJECT_STORE_H_
 
 #include "vm/object.h"
 
 namespace dart {
@@ skipping 461 matching lines @@
   }
   RawFunction* megamorphic_miss_function() const {
     return megamorphic_miss_function_;
   }
   void SetMegamorphicMissHandler(const Code& code, const Function& func) {
     // Hold onto the code so it is traced and not detached from the function.
     megamorphic_miss_code_ = code.raw();
     megamorphic_miss_function_ = func.raw();
   }
 
+  RawFunction* simple_instance_of_function() const {
+    return simple_instance_of_function_;
+  }
+  RawFunction* simple_instance_of_true_function() const {
+    return simple_instance_of_true_function_;
+  }
+  RawFunction* simple_instance_of_false_function() const {
+    return simple_instance_of_false_function_;
+  }
+
   // Visit all object pointers.
   void VisitObjectPointers(ObjectPointerVisitor* visitor);
 
   // Called to initialize objects required by the vm but which invoke
   // dart code.  If an error occurs the error object is returned otherwise
   // a null object is returned.
   RawError* PreallocateObjects();
 
   void InitKnownObjects();
 
   static void Init(Isolate* isolate);
 
   void PrintToJSONObject(JSONObject* jsobj);
 
  private:
   ObjectStore();
 
+  // Finds a core library private method in Object.
+  RawFunction* PrivateObjectLookup(const String& name);
+
 #define OBJECT_STORE_FIELD_LIST(V)                                             \
   V(RawClass*, object_class_)                                                  \
   V(RawType*, object_type_)                                                    \
   V(RawClass*, null_class_)                                                    \
   V(RawType*, null_type_)                                                      \
   V(RawType*, function_type_)                                                  \
   V(RawClass*, closure_class_)                                                 \
   V(RawType*, number_type_)                                                    \
   V(RawType*, int_type_)                                                       \
   V(RawClass*, integer_implementation_class_)                                  \
@@ skipping 56 matching lines @@
   V(RawGrowableObjectArray*, error_listeners_)                                 \
   V(RawContext*, empty_context_)                                               \
   V(RawInstance*, stack_overflow_)                                             \
   V(RawInstance*, out_of_memory_)                                              \
   V(RawUnhandledException*, preallocated_unhandled_exception_)                 \
   V(RawStacktrace*, preallocated_stack_trace_)                                 \
   V(RawFunction*, lookup_port_handler_)                                        \
   V(RawTypedData*, empty_uint32_array_)                                        \
   V(RawFunction*, handle_message_function_)                                    \
   V(RawArray*, library_load_error_table_)                                      \
+  V(RawFunction*, simple_instance_of_function_)                                \
+  V(RawFunction*, simple_instance_of_true_function_)                           \
+  V(RawFunction*, simple_instance_of_false_function_)                          \
+  V(RawArray*, compile_time_constants_)                                        \
   V(RawArray*, unique_dynamic_targets_)                                        \
   V(RawGrowableObjectArray*, token_objects_)                                   \
   V(RawArray*, token_objects_map_)                                             \
   V(RawGrowableObjectArray*, megamorphic_cache_table_)                         \
   V(RawCode*, megamorphic_miss_code_)                                          \
   V(RawFunction*, megamorphic_miss_function_)                                  \
+  // Please remember the last entry must be referred in the 'to' function below.
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&object_class_); }
 #define DECLARE_OBJECT_STORE_FIELD(type, name)                                 \
   type name;
 OBJECT_STORE_FIELD_LIST(DECLARE_OBJECT_STORE_FIELD)
 #undef DECLARE_OBJECT_STORE_FIELD
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&megamorphic_miss_function_);
   }
   RawObject** to_snapshot(Snapshot::Kind kind) {
@@ skipping 15 matching lines @@
 
   friend class Serializer;
   friend class Deserializer;
 
   DISALLOW_COPY_AND_ASSIGN(ObjectStore);
 };
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_STORE_H_