Writing an LLVM Pass

I think this is actually really old, it's been around since the early LLVM versions.

Still, it's definitely the best way to get exposed to writing optimizations using LLVM. Writing optimization passes ends up being really self-contained too (just that one file/class, and it 'automatically' gets registered into the optimizer), so it might be just one of the better ways of learning LLVM overall.

Writing an LLVM pass isn't too bad. Debugging one, on the other hand...

Thanks for this, I really like this type of post.