You're reading from LLVM Code Generation A deep dive into compiler backend development

Product type Paperback

Published in May 2025

Publisher Packt

ISBN-13 9781837637782

Length 608 pages

Edition 1st Edition

Languages

C++

Tools

LLVM

Concepts

Programming Language

Author (1):

Quentin Colombet

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Table of Contents (29) Chapters

Preface

1. Getting Started with LLVM

2. Building LLVM and Understanding the Directory Structure FREE CHAPTER

3. Contributing to LLVM

4. Compiler Basics and How They Map to LLVM APIs

5. Writing Your First Optimization

6. Dealing with Pass Managers

7. TableGen – LLVM Swiss Army Knife for Modeling

8. Middle-End: LLVM IR to LLVM IR

9. Understanding LLVM IR

10. Survey of the Existing Passes

11. Introducing Target-Specific Constructs

12. Hands-On Debugging LLVM IR Passes

13. Introduction to the Backend

14. Getting Started with the Backend

15. Getting Started with the Machine Code Layer

16. The Machine Pass Pipeline

17. LLVM IR to Machine IR

18. Getting Started with Instruction Selection

19. Instruction Selection: The IR Building Phase

20. Instruction Selection: The Legalization Phase

21. Instruction Selection: The Selection Phase and Beyond

22. Final Lowering and Optimizations

23. Instruction Scheduling

24. Register Allocation

25. Lowering of the Stack Layout

26. Getting Started with the Assembler

27. Other Books You May Enjoy

28. Index

Technical requirements

In this chapter, we will build LLVM from sources, and as such, all the requirements of Chapter 1 apply. In other words, you need a working version of Git, CMake, Python, and a C++ toolchain. Refer to Chapter 1 to see how to meet these requirements.

Additionally, in this chapter, we introduce a second repository for all the changes that need to happen directly in LLVM when adding a new backend. This repository is available at https://github.com/PacktPublishing/LLVM-Code-Generation-by-example This repository is a clone of the LLVM open source repository, which we augmented with all the code changes that are required to create a new backend.

In other words, this repository holds the complete code changes that are mentioned in the snippets presented in this chapter, and by looking at the details of each commit, you can see how things connect in the build system, and so on. To look at the details of each commit, you can use the git log -p command line on...