Fix a bug in Equals for UseVal and ConstantVal.

runtime/vm/intermediate_language.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_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 376 matching lines @@
 
   virtual bool CanDeoptimize() const { return false; }
 
   UseVal* next_use() const { return next_use_; }
   UseVal* previous_use() const { return previous_use_; }
   virtual void RemoveFromUseList();
   virtual void RemoveInputUses() { RemoveFromUseList(); }
 
   virtual intptr_t ResultCid() const;
 
+  virtual bool AttributesEqual(Computation* other) const;
+
  private:
   void AddToUseList();
   Definition* definition_;
   UseVal* next_use_;
   UseVal* previous_use_;
 
   friend class Definition;
 
   DISALLOW_COPY_AND_ASSIGN(UseVal);
 };
@@ skipping 17 matching lines @@
 
   // Returns true if the value represents constant null.
   virtual bool BindsToConstantNull() const { return value().IsNull(); }
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual void RemoveFromUseList() { }
 
   virtual intptr_t ResultCid() const;
 
+  virtual bool AttributesEqual(Computation* other) const;
+
  private:
   const Object& value_;
 
   DISALLOW_COPY_AND_ASSIGN(ConstantVal);
 };
 
 #undef DECLARE_VALUE
 
 
 class AssertAssignableComp : public TemplateComputation<3> {
@@ skipping 2576 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_