The code generator doesn't need to put the argument count in eax for...

src/virtual-frame-ia32.cc

 // Copyright 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 766 matching lines @@
   return result;
 }
 
 
 Result VirtualFrame::CallCodeObject(Handle<Code> code,
                                     RelocInfo::Mode rmode,
                                     Result* arg,
                                     int dropped_args) {
   int spilled_args = 0;
   switch (code->kind()) {
-    case Code::CALL_IC:
-      ASSERT(arg->reg().is(eax));
-      spilled_args = dropped_args + 1;
-      break;
     case Code::LOAD_IC:
       ASSERT(arg->reg().is(ecx));
       ASSERT(dropped_args == 0);
       spilled_args = 1;
       break;
     case Code::KEYED_STORE_IC:
       ASSERT(arg->reg().is(eax));
       ASSERT(dropped_args == 0);
       spilled_args = 2;
       break;
@@ skipping 150 matching lines @@
   ASSERT(stack_pointer_ == elements_.length() - 1);
   elements_.Add(FrameElement::MemoryElement());
   stack_pointer_++;
   __ push(immediate);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal