Chapter 3: Testing with LLVM LIT
In the previous chapter, we learned how to take advantage of LLVM's own CMake utilities to improve our development experience. We also learned how to seamlessly integrate LLVM into other out-of-tree projects. In this chapter, we're going to talk about how to get hands-on with LLVM's own testing infrastructure, LIT.
LIT is a testing infrastructure that was originally developed for running LLVM's regression tests. Now, it's not only the harness for running all the tests in LLVM (both unit and regression tests) but also a generic testing framework that can be used outside of LLVM. It also provides a wide range of testing formats to tackle different scenarios. This chapter will give you a thorough tour of the components in this framework and help you master LIT.
We are going to cover the following topics in this chapter:
- Using LIT in out-of-tree projects
- Learning about advanced FileCheck tricks
- Exploring the...
