More efficient identification of dynamic and void types.

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 5454 matching lines @@
 
   // Returns a formatted list of occuring types with their URI.
   virtual RawString* EnumerateURIs() const;
 
   virtual intptr_t Hash() const;
 
   // The name of this type's class, i.e. without the type argument names of this
   // type.
   RawString* ClassName() const;
 
-  // Check if this type represents the 'dynamic' type.
-  bool IsDynamicType() const {
-    return !IsFunctionType() &&
-        HasResolvedTypeClass() &&
-        (type_class() == Object::dynamic_class());
-  }
+  // Check if this type represents the 'dynamic' type or if it is malformed,
+  // since a malformed type is mapped to 'dynamic'.
+  // Call IsMalformed() first, if distinction is required.
+  bool IsDynamicType() const;
+
+  // Check if this type represents the 'void' type.
+  bool IsVoidType() const;
 
   // Check if this type represents the 'Null' type.
   bool IsNullType() const;
 
-  // Check if this type represents the 'void' type.
-  bool IsVoidType() const {
-    return !IsFunctionType() &&
-        HasResolvedTypeClass() &&
-        (type_class() == Object::void_class());
-  }
-
   bool IsObjectType() const {
     return !IsFunctionType() &&
         HasResolvedTypeClass() &&
         Class::Handle(type_class()).IsObjectClass();
   }
 
   // Check if this type represents the 'bool' type.
   bool IsBoolType() const;
 
   // Check if this type represents the 'int' type.
@@ skipping 3026 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_