On Thu, May 6, 2010 at 8:34 PM, John Regehr <regehr at cs.utah.edu> wrote: > I keep running into cases where some program crashes clang with -O1 but > not -O, or vice versa. > > Why are these different? What's the difference? If I were a normal > programmer which would I want to use? IIRC -O maps to -O2. -Eli