llvm2cpg is a tool that converts LLVM Bitcode into Code Property Graph (CPG).
The CPG can be further analyzed via Joern or Ocular.
To get started, make sure to look into an introductory tutorial.
After that, follow along and learn how to extract LLVM Bitcode from real-world projects.
If you get questions - feel free to open an issue or come over to the Joern chat.