Put direct code pointers into JSFunction objects. This is a first step...

src/ia32/builtins-ia32.cc

 // Copyright 2006-2009 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 530 matching lines @@
     __ bind(&function);
   }
 
   // 5b. Get the code to call from the function and check that the number of
   //     expected arguments matches what we're providing.  If so, jump
   //     (tail-call) to the code in register edx without checking arguments.
   __ mov(edx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
   __ mov(ebx,
          FieldOperand(edx, SharedFunctionInfo::kFormalParameterCountOffset));
   __ SmiUntag(ebx);
-  __ mov(edx, FieldOperand(edx, SharedFunctionInfo::kCodeOffset));
+  __ mov(edx, FieldOperand(edi, JSFunction::kCodeOffset));
   __ lea(edx, FieldOperand(edx, Code::kHeaderSize));
   __ cmp(eax, Operand(ebx));
   __ j(not_equal, Handle<Code>(builtin(ArgumentsAdaptorTrampoline)));
 
   ParameterCount expected(0);
   __ InvokeCode(Operand(edx), expected, expected, JUMP_FUNCTION);
 }
 
 
 void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
@@ skipping 690 matching lines @@
   __ bind(&dont_adapt_arguments);
   __ jmp(Operand(edx));
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32