Replace BIT_NOT by XOR with ~0

src/ast.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1809 matching lines @@
   Handle<String> name_;
   const Runtime::Function* function_;
   ZoneList<Expression*>* arguments_;
 };
 
 
 class UnaryOperation: public Expression {
  public:
   DECLARE_NODE_TYPE(UnaryOperation)
 
-  virtual bool ResultOverwriteAllowed();
-
   Token::Value op() const { return op_; }
   Expression* expression() const { return expression_; }
   virtual int position() const { return pos_; }
 
   BailoutId MaterializeTrueId() { return materialize_true_id_; }
   BailoutId MaterializeFalseId() { return materialize_false_id_; }
 
   TypeFeedbackId UnaryOperationFeedbackId() const { return reuse(id()); }
 
   virtual void RecordToBooleanTypeFeedback(TypeFeedbackOracle* oracle);
@@ skipping 1367 matching lines @@
  private:
   Isolate* isolate_;
   Zone* zone_;
   Visitor visitor_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_