An even more fine-grained binary search technique for isolating compiler bugs is optimization fuel: http://blog.ezyang.com/2011/06/debugging-compilers-with-opt

An even more fine-grained binary search technique for isolating compiler bugs is optimization fuel: http://blog.ezyang.com/2011/06/debugging-compilers-with-optimization-fuel/ http://blog.ezyang.com/2011/06/debugging-compilers-with-opti...