Make frequent type checks (instanceof) faster by adding dedicated instanceof methods; improves dart…

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 5021 matching lines @@
 
   // Check if this type represents the 'Float64x2' type.
   bool IsFloat64x2Type() const;
 
   // Check if this type represents the 'Int32x4' type.
   bool IsInt32x4Type() const;
 
   // Check if this type represents the 'num' type.
   bool IsNumberType() const;
 
+  // Check if this type represents the '_Smi' type.
+  bool IsSmiType() const;
+
   // Check if this type represents the 'String' type.
   bool IsStringType() const;
 
   // Check if this type represents the 'Function' type.
   bool IsFunctionType() const;
 
   // Check the subtype relationship.
   bool IsSubtypeOf(const AbstractType& other, Error* bound_error) const {
     return TypeTest(kIsSubtypeOf, other, bound_error);
   }
@@ skipping 2940 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_