LLVM Techniques, Tips, and Best Practices Clang and Middle-End Libraries

Spis treści książki

• LLVM Techniques, Tips, and Best Practices Clang and Middle-End Libraries
• Contributors
• About the author
• About the reviewer
• Preface
  • Who this book is for
  • What this book covers
  • To get the most out of this book
  • Download the example code files
  • Download the color images
  • Conventions used
  • Get in touch
  • Reviews
• Section 1: Build System and LLVM-Specific Tooling
• Chapter 1: Saving Resources When Building LLVM
  • Technical requirements
  • Cutting down building resources with better tooling
    • Replacing GNU Make with Ninja
    • Avoiding the use of the BFD linker
  • Tweaking CMake arguments
    • Choosing the right build type
    • Avoiding building all targets
    • Building as shared libraries
    • Splitting the debug info
    • Building an optimized version of llvm-tblgen
    • Using the new PassManager and Clang
  • Using GN for a faster turnaround time
  • Summary
  • Further reading
• Chapter 2: Exploring LLVMs Build System Features
  • Technical requirements
  • Exploring a glossary of LLVM's important CMake directives
    • Using the CMake function to add new libraries
    • Using the CMake function to add executables and tools
    • Using the CMake function to add Pass plugins
  • Understanding CMake integration for out-of-tree projects
  • Summary
• Chapter 3: Testing with LLVM LIT
  • Technical requirements
  • Using LIT in out-of-tree projects
    • Preparing for our example project
    • Writing LIT configurations
    • LIT internals
  • Learning useful FileCheck tricks
    • Preparing for our example project
    • Writing FileCheck directives
  • Exploring the TestSuite framework
    • Preparing for our example project
    • Importing code into llvm-test-suite
  • Summary
  • Further reading
• Chapter 4: TableGen Development
  • Technical requirements
  • Introduction to TableGen syntax
    • Layout and records
    • Bang operators
    • Multiclass
    • The DAG data type
  • Writing a donut recipe in TableGen
  • Printing a recipe via the TableGen backend
    • TableGen's high-level workflow
    • Writing the TableGen backend
    • Integrating the RecipePrinter TableGen backend
  • Summary
  • Further reading
• Section 2: Frontend Development
• Chapter 5: Exploring Clang's Architecture
  • Technical requirements
  • Learning Clang's subsystems and their roles
    • Driver
    • LLVM, assemblers, and linkers
  • Exploring Clang's tooling features and extension options
    • The FrontendAction class
    • Clang plugins
    • LibTooling and Clang Tools
  • Summary
  • Further reading
• Chapter 6: Extending the Preprocessor
  • Technical requirements
  • Working with SourceLocation and SourceManager
    • Introducing SourceLocation
    • Introducing SourceManager
  • Learning preprocessor and lexer essentials
    • Understanding the role of the preprocessor and lexer in Clang
    • Understanding Token
    • Handling macros
  • Developing custom preprocessor plugins and callbacks
    • The project goal and preparation
    • Implementing a custom pragma handler
    • Implementing custom preprocessor callbacks
  • Summary
  • Exercises
• Chapter 7: Handling AST
  • Technical requirements
  • Learning about AST in Clang
    • In-memory structure of Clang AST
    • Types in Clang AST
    • ASTMatcher
  • Writing AST plugins
    • Project overview
    • Printing diagnostic messages
    • Creating the AST plugin
  • Summary
• Chapter 8: Working with Compiler Flags and Toolchains
  • Technical requirements
  • Understanding drivers and toolchains in Clang
  • Adding custom driver flags
    • Project overview
    • Declaring custom driver flags
    • Translating custom driver flags
    • Passing flags to the frontend
  • Adding a custom toolchain
    • Project overview
    • Creating the toolchain and adding a custom include path
    • Creating a custom assembling stage
    • Creating a custom linking stage
    • Verifying the custom toolchain
  • Summary
  • Exercises
• Section 3: "Middle-End" Development
• Chapter 9: Working with PassManager and AnalysisManager
  • Technical requirements
  • Writing an LLVM Pass for the new PassManager
    • Project overview
    • Writing the StrictOpt Pass
  • Working with the new AnalysisManager
    • Overview of the project
    • Writing the HaltAnalyzer Pass
  • Learning instrumentations in the new PassManager
    • Printing Pass pipeline details
    • Printing changes to the IR after each Pass
    • Bisecting the Pass pipeline
  • Summary
  • Questions
• Chapter 10: Processing LLVM IR
  • Technical requirements
  • Learning LLVM IR basics
    • Iterating different IR units
    • Iterating instructions
    • Iterating basic blocks
    • Iterating the call graph
    • Learning about GraphTraits
  • Working with values and instructions
    • Understanding SSA
    • Working with values
    • Working with instructions
  • Working with loops
    • Learning about loop representation in LLVM
    • Learning about loop infrastructure in LLVM
  • Summary
• Chapter 11: Gearing Up with Support Utilities
  • Technical requirements
  • Printing diagnostic messages
  • Collecting statistics
    • Using the Statistic class
    • Using an optimization remark
  • Adding time measurements
    • Using the Timer class
    • Collecting the time trace
  • Error-handling utilities in LLVM
    • Introducing the Error class
  • Learning about the Expected and ErrorOr classes
    • The Expected class
    • The ErrorOr class
  • Summary
• Chapter 12: Learning LLVM IR Instrumentation
  • Technical requirements
  • Developing a sanitizer
    • An example of using an address sanitizer
    • Creating a loop counter sanitizer
  • Working with PGO
    • Introduction to instrumentation-based PGO
    • Introduction to sampling-based PGO
    • Using profiling data analyses
  • Summary
• Assessments
  • Chapter 6, Extending the Preprocessor
  • Chapter 8, Working with Compiler Flags and Toolchains
  • Chapter 9, Working with PassManager and AnalysisManager
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