Disallow dereferencing deferred handles when generating optimized code.

src/code.h

 // Copyright 2006-2008 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 11 matching lines @@
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef V8_CODE_H_
 #define V8_CODE_H_
 
 #include "allocation.h"
+#include "handles.h"
+#include "objects.h"
 
 namespace v8 {
 namespace internal {
 
 
 // Wrapper class for passing expected and actual parameter counts as
 // either registers or immediate values. Used to make sure that the
 // caller provides exactly the expected number of parameters to the
 // callee.
 class ParameterCount BASE_EMBEDDED {
  public:
   explicit ParameterCount(Register reg)
       : reg_(reg), immediate_(0) { }
   explicit ParameterCount(int immediate)
       : reg_(no_reg), immediate_(immediate) { }
+  explicit ParameterCount(Handle<JSFunction> f)
+      : reg_(no_reg), immediate_(f->shared()->formal_parameter_count()) { }
 
   bool is_reg() const { return !reg_.is(no_reg); }
   bool is_immediate() const { return !is_reg(); }
 
   Register reg() const {
     ASSERT(is_reg());
     return reg_;
   }
   int immediate() const {
     ASSERT(is_immediate());
     return immediate_;
   }
 
  private:
   const Register reg_;
   const int immediate_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ParameterCount);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_H_