- LLVM Cookbook
- Table of Contents
- LLVM Cookbook
- Credits
- About the Authors
- About the Reviewers
- www.PacktPub.com
- Preface
- 1. LLVM Design and Use
- Introduction
- Understanding modular design
- Cross-compiling Clang/LLVM
- Converting a C source code to LLVM assembly
- Converting IR to LLVM bitcode
- Converting LLVM bitcode to target machine assembly
- Converting LLVM bitcode back to LLVM assembly
- Transforming LLVM IR
- Linking LLVM bitcode
- Executing LLVM bitcode
- Using the C frontend Clang
- Using the GO frontend
- Using DragonEgg
- 2. Steps in Writing a Frontend
- Introduction
- Defining a TOY language
- Implementing a lexer
- Defining Abstract Syntax Tree
- Implementing a parser
- Parsing simple expressions
- Parsing binary expressions
- Invoking a driver for parsing
- Running lexer and parser on our TOY language
- Defining IR code generation methods for each AST class
- Generating IR code for expressions
- Generating IR code for functions
- Adding IR optimization support
- 3. Extending the Frontend and Adding JIT Support
- 4. Preparing Optimizations
- 5. Implementing Optimizations
- 6. Target-independent Code Generator
- Introduction
- The life of an LLVM IR instruction
- Visualizing LLVM IR CFG using GraphViz
- Describing targets using TableGen
- Defining an instruction set
- Adding a machine code descriptor
- Implementing the MachineInstrBuilder class
- Implementing the MachineBasicBlock class
- Implementing the MachineFunction class
- Writing an instruction selector
- Legalizing SelectionDAG
- Optimizing SelectionDAG
- Selecting instruction from the DAG
- Scheduling instructions in SelectionDAG
- 7. Optimizing the Machine Code
- 8. Writing an LLVM Backend
- 9. Using LLVM for Various Useful Projects
- Index
In this chapter, we will cover the following topics:
- Understanding modular design
- Cross-compiling Clang/LLVM
- Converting a C source code to LLVM assembly
- Converting IR to LLVM bitcode
- Converting LLVM bitcode to target machine assembly
- Converting LLVM bitcode back to LLVM assembly
- Transforming LLVM IR
- Linking LLVM bitcode
- Executing LLVM bitcode
- Using C frontend Clang
- Using the GO frontend
- Using DragonEgg
In this recipe, you get to know about LLVM, its design, and how we can make multiple uses out of the various tools it provides. You will also look into how you can transform a simple C code to the LLVM intermediate representation and how you can transform it into various forms. You will also learn how the code is organized within the LLVM source tree and how can you use it to write a compiler on your own later.
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