Very basic example codes.

• bbskel: BasicBlock pass skeleton
• cgspskel: CallGraphSCC pass skeleton
• comminute: tool illustrating pass mgr, pass deps, and more
• fpskel: FunctionPass skeleton
• intflip: integer argument randomizer|bit-flipper
• mpskel: ModulePass skeleton
• newpm: Making use of the new pass manager API (req 4.0)
• npassert: NULL pointer check insertion
• rpskel: RegionPass skeleton
• visitorskel: Using a InstVisitor class