Create Your Own LLVM Pass as a Plugin (Step-by-Step Guide)

f you're getting into compilers or exploring LLVM internals, one of the most powerful things you can learn is how to build your own LLVM Pass. I’ve put together a hands-on guide that walks you through creating an LLVM pass as a plugin — something that’s actually used in real-world compiler workflows. 💡 What You’ll Learn How LLVM passes work internally How to create a custom pass from scratch How to structure your plugin How to build it using CMake How to dynamically load and run it in LLVM 🔧 W