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  • Book Overview & Buying Getting started with LLVM core libraries
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Getting started with LLVM core libraries

Getting started with LLVM core libraries

By : Bruno Lopes, Auler
4.3 (18)
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Getting started with LLVM core libraries

Getting started with LLVM core libraries

4.3 (18)
By: Bruno Lopes, Auler
Buy this Book

Overview of this book

In today’s fast-paced world of change, companies expect you to do more, with less. Drawing on over a decade of Change Management experience as a consultant with Fortune 500 companies including IBM and NCR, Emily Carr shares the secrets to making change happen smoothly.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Build and Install LLVM
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1. Build and Install LLVM
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Understanding LLVM versions
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Obtaining prebuilt packages
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Building from sources
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Summary
2
2. External Projects
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2. External Projects
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Introducing Clang extras
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Using the DragonEgg plugin
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Summary
3
3. Tools and Design
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3. Tools and Design
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Introducing LLVM's basic design principles and its history
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Understanding LLVM today
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Interacting with the compiler driver
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Using standalone tools
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Delving into the LLVM internal design
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Writing your first LLVM project
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Navigating the LLVM source – general advice
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Summary
4
4. The Frontend
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4. The Frontend
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Introducing Clang
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Learning the frontend phases with Clang
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Putting it together
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Summary
5
5. The LLVM Intermediate Representation
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5. The LLVM Intermediate Representation
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Overview
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Exercising basic tools to manipulate the IR formats
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Introducing the LLVM IR language syntax
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Writing a custom LLVM IR generator
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Optimizing at the IR level
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Summary
6
6. The Backend
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6. The Backend
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Overview
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Learning the backend code structure
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Knowing the backend libraries
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Learning how to use TableGen for LLVM backends
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Understanding the instruction selection phase
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Scheduler
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Machine instructions
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Register allocation
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Prologue and epilogue
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Understanding the machine code framework
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Writing your own machine pass
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Summary
7
7. The Just-in-Time Compiler
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7. The Just-in-Time Compiler
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Getting to know the LLVM JIT engine basics
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Introducing the llvm::JIT framework
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Introducing the llvm::MCJIT framework
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Using LLVM JIT compilation tools
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Other resources
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Summary
8
8. Cross-platform Compilation
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8. Cross-platform Compilation
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Comparing GCC and LLVM
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Understanding target triples
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Preparing your toolchain
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Cross-compiling with Clang command-line arguments
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Generating a Clang cross-compiler
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Testing
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Additional resources
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Summary
9
9. The Clang Static Analyzer
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9. The Clang Static Analyzer
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Understanding the role of a static analyzer
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Testing the static analyzer
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Extending the static analyzer with your own checkers
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More resources
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Summary
10
10. Clang Tools with LibTooling
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10. Clang Tools with LibTooling
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Generating a compile command database
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The clang-tidy tool
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Refactoring tools
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Writing your own tool
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More resources
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Summary
11
Index
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Index

Chapter 1. Build and Install LLVM

The LLVM infrastructure is available for several Unix environments (GNU/Linux, FreeBSD, Mac OS X) and Windows. In this chapter, we describe the necessary steps to get LLVM working in all these systems, step by step. LLVM and Clang prebuilt packages are available in some systems but they can be compiled from the source otherwise.

A beginner LLVM user must consider the fact that the basic setup for a LLVM-based compiler includes both LLVM and Clang libraries and tools. Therefore, all the instructions in this chapter are aimed at building and installing both. Throughout this book, we will focus on LLVM Version 3.4. It is important to note, however, that LLVM is a young project and under active development; therefore, it is subject to change.

Tip

At the time of this writing, LLVM 3.5 had not been released. While this book focuses on LLVM Version 3.4, we plan to release an appendix updating the examples in this book to LLVM 3.5 by the third week of September 2014, allowing you to exercise the content of the book with the newest versions of LLVM. This appendix will be available at https://www.packtpub.com/sites/default/files/downloads/6924OS_Appendix.pdf.

This chapter will cover the following topics:

  • Understanding LLVM versions
  • Installing LLVM with prebuilt binaries
  • Installing LLVM using package managers
  • Building LLVM from source for Linux
  • Building LLVM from source for Windows and Visual Studio
  • Building LLVM from source for Mac OS X and Xcode
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