Sorry. There is no tool that will scan through your code and automatically tell you what parts will run or not, at least not beyond just running the code and watching for errors.
I'd bet that would be a pretty difficult tool to write, and to maintain, since it would need to be updated after every release. It would also need to be updated for every prior release, a task with quadratic growth in complexity with each release. A programmer who chooses to be tricky in their code will easily confuse such a tool anyway. Can you imagine how it would deal with the use of eval?
With each release, there are lists of things that have changed. As much as possible, TMW tries to maintain backwards compatibility, but sometimes that does become impossible.
