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This is the code repository for Learn LLVM 12, published by Packt.
A beginner's guide to learning LLVM compiler tools and core libraries with C++
LLVM was built to bridge the gap between compiler textbooks and actual compiler development. It provides a modular codebase and advanced tools which help developers to build compilers easily. This book provides a practical introduction to LLVM, gradually helping you navigate through complex scenarios with ease when it comes to building and working with compilers.
You’ll start by configuring, building, and installing LLVM libraries, tools, and external projects. Next, the book will introduce you to LLVM design and how it works in practice during each LLVM compiler stage: frontend, optimizer, and backend. Using a subset of a real programming language as an example, you will then learn how to develop a frontend and generate LLVM IR, hand it over to the optimization pipeline, and generate machine code from it. Later chapters will show you how to extend LLVM with a new pass and how instruction selection in LLVM works. You’ll also focus on Just-in-Time compilation issues and the current state of JIT-compilation support that LLVM provides, before finally going on to understand how to develop a new backend for LLVM.
By the end of this LLVM book, you will have gained real-world experience in working with the LLVM compiler development framework with the help of hands-on examples and source code snippets.
This book covers the following exciting features: Configure, compile, and install the LLVM framework Understand how the LLVM source is organized Discover what you need to do to use LLVM in your own projects Explore how a compiler is structured, and implement a tiny compiler Generate LLVM IR for common source language constructs Set up an optimization pipeline and tailor it for your own needs Extend LLVM with transformation passes and clang tooling Add new machine instructions and a complete backend
If you feel this book is for you, get your copy today!
All of the code is organized into folders. For example, Chapter02.
The code will look like the following:
Size = 4;
uint32_t Inst = 0;
for (uint32_t I = 0; I < Size; ++I)
Page 6, paragraph 2: .....with a package manager. The easiest way to install all the software is to use the Chocolately should be read as .....with a package manager. The easiest way to install all the software is to use the Chocolatey
Page 33, bullet point no. 5: You should see the friendly message. Please also check that the Basic library was installed:
$ ls ../llvm-12/lib/libtinylang*
This will show that there is a libtinylangBasic.a file.
Should be read as:
You should see the friendly message. Please also check that the Basic library was installed:
$ ls ../llvm-12/lib/tinylang*
This will show that there is a tinylangBasic.lib file.
Following is what you need for this book: This book is for compiler developers, enthusiasts, and engineers who are new to LLVM and are interested in learning about the LLVM framework. It is also useful for C++ software engineers looking to use compiler-based tools for code analysis and improvement, as well as casual users of LLVM libraries who want to gain more knowledge of LLVM essentials. Intermediate-level experience with C++ programming is mandatory to understand the concepts covered in this book more effectively.
With the following software and hardware list you can run all code files present in the book (Chapter 1-12).
| No. | Software required | OS required |
|---|---|---|
| 1 | C/C++ compiler | Windows, Mac OS X, and Linux (Any) |
| 2 | CMake 3.13.4 or later | Windows, Mac OS X, and Linux (Any) |
| 3 | Ninja 1.9.0 | Windows, Mac OS X, and Linux (Any) |
| 4 | Python 3.6 or later | Windows, Mac OS X, and Linux (Any) |
| 6 | Git 1.7.10 or later | Windows, Mac OS X, and Linux (Any) |
We also provide a PDF file that has color images of the screenshots/diagrams used in this book. Click here to download it.
Please visit the following link to check the CiA videos: https://bit.ly/3nllhED
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Kai Nacke is a professional IT architect currently living in Toronto, Canada. He holds a diploma in computer science from the Technical University of Dortmund, Germany. His diploma thesis about universal hash functions was recognized as the best of the semester. He has been working in the IT industry for more than 20 years and has great experience in the development and architecture of business and enterprise applications. In his current role, he evolves an LLVM/Clang-based compiler. For some years, he was the maintainer of LDC, the LLVM-based D compiler. He is the author of D Web Development, published by Packt. In the past, he was also a speaker in the LLVM developer room at the FOSDEM.
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