On October 25th–27th, 2010 this years GCC Developer Summit was held in Ottawa, Ontario, Canada.
For example When smart programmers write bad code. John Regehr had an interesting paper: Exposing Difficult Compilers Bugs With Random Testing.
A couple of papers on Google's Go Language, which I keep wonder how well it could be made to work on Embedded Systems, as it has issues of concurrency designed into the language?
Check out the papers if you are interested in the internals of GCC, where GCC is headed, or how you might improve your own code when you use GCC.