I've been playing with quest, a random test generator for C compilers. Just for the heck of it I pasted a test into the LLVM web page and got an interval compiler error on the first try. So you folks may want to take a look. http://www.st.cs.uni-sb.de/~lindig/src/quest/ John Regehr -- John Regehr, regehr at cs.utah.edu Assistant Professor, School of Computing, University of Utah