This is a simple implementation of bounded exhaustive testing for LLVM programs. It is useful for testing optimizations. Although it could be used in a variety of ways, we are using it in conjunction with Alive:

https://github.com/nunoplopes/alive

The process is to generate a set of functions and then, for each:

• run one or more LLVM passes on the function
• use Alive to prove that the optimized code refines the original code (i.e., that the optimization was correct) Any verification failure represents a bug in LLVM or Alive.

Building opt-fuzz:

First, checkout LLVM + Clang. Hopefully most any recent version will work, opt-fuzz was last tested against r239564. Second, checkout opt-fuzz in the tools directory. Third, configure, build, and install LLVM: opt-fuzz will be installed along with the rest of the LLVM tools.