Rewrite of VisitCountOperation that should speed it up

src/virtual-frame-ia32.h

 // Copyright 2009 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 154 matching lines @@
   // Set a frame element to a constant.  The index is frame-top relative.
   void SetElementAt(int index, Handle<Object> value) {
     Result temp(value, cgen_);
     SetElementAt(index, &temp);
   }
 
   void PushElementAt(int index) {
     PushFrameSlotAt(elements_.length() - index - 1);
   }
 
+  void StoreToElementAt(int index) {
+    StoreToFrameSlotAt(elements_.length() - index - 1);
+  }
+
   // A frame-allocated local as an assembly operand.
   Operand LocalAt(int index) const {
     ASSERT(0 <= index);
     ASSERT(index < local_count_);
     return Operand(ebp, kLocal0Offset - index * kPointerSize);
   }
 
   // Push a copy of the value of a local frame slot on top of the frame.
   void PushLocalAt(int index) {
     PushFrameSlotAt(local0_index() + index);
@@ skipping 295 matching lines @@
   Result RawCallCodeObject(Handle<Code> code, RelocInfo::Mode rmode);
 
   bool Equals(VirtualFrame* other);
 
   friend class JumpTarget;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_VIRTUAL_FRAME_IA32_H_