How to compile a C/C++ code into a three address code written by C/C++code?

Question

I want to compile a C/C++ code into a three address code, which is also a legal C/C++ code.

I'm doing an experiment, in which I have to analyze the three address code and add some C codes into the generated three address code. The modified three address code will be compiled into an executable file.

I have tried gimple with gcc, but gimple is just a C-like presentation. Is there any useful tool? Thank you ~