Thanks a bunch everyone! I find SSA a lot more natural now, and I've   
   realised that my implementation isn't taking good advantage of it.   
   I've also bought "Engineering a Compiler", which together with the   
   other papers you've suggested is helping me re-implement part of my   
   optimizer. Thanks again.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)