Experimental: a quick hack to allow different live values to flow down...

src/codegen-ia32.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 171 matching lines @@
                               bool is_toplevel,
                               Handle<Script> script);
 
   // Accessors
   MacroAssembler* masm() { return masm_; }
 
   VirtualFrame* frame() const { return frame_; }
 
   bool has_valid_frame() const { return frame_ != NULL; }
 
-  void SetFrame(VirtualFrame* frame);
+  // Set the virtual frame to be new_frame, with non-frame register
+  // reference counts given by non_frame_registers.  The non-frame register
+  // reference counts of the old frame are returned in non_frame_registers.
+  void SetFrame(VirtualFrame* new_frame, RegisterFile* non_frame_registers);
 
   void DeleteFrame();
 
   RegisterAllocator* allocator() const { return allocator_; }
 
   CodeGenState* state() { return state_; }
   void set_state(CodeGenState* state) { state_ = state; }
 
   void AddDeferred(DeferredCode* code) { deferred_.Add(code); }
 
@@ skipping 308 matching lines @@
   cgen_->set_in_spilled_code(false);
   GetValue(typeof_state);
   cgen_->frame()->SpillAll();
   cgen_->set_in_spilled_code(true);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_IA32_H_