LLVM

  • LLVM
    • =Low Level Virtual Machine
    • 是什么=一句话描述
      • 一套用于构建出高度优化的编译器、优化器、运行环境的工具集合
        • a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.
    • 主要包含3个部分
      • LLVM套件=LLVM Suite
        • 包含各种
          • 工具
            • 汇编器=assembler
            • 反汇编器=disassembler
            • 位码分析器=bitcode analyzer
            • 位码优化器=bitcode optimizer
            • 简单的回归测试
              • 用于测试LLVM工具和Clang前端
          • 头文件
      • Clang=Clang前端=Clang front end
        • 是什么:LLVM的内置的原生的C/C++/Objective-C编译器
        • 可以把C, C++, Objective-CObjective-C++的代码,编译成LLVM bitcode
          • 然后就可以用LLVM套件去操作此(编译后的)程序了
      • 测试套件=Test Suite
        • 一堆工具的集合
          • 测试LLVM的功能和性能
    • 子项目
      • LLVM Core libraries
        • a modern source- and target-independent optimizer, along with code generation support for many popular CPUs
      • Clang
        • an LLVM native C/C++/Objective-C compiler
      • LLDB
        • a great native debugger
          • 基于LLVMClang
      • libc++libc++ ABI
        • a standard conformant and high-performance implementation of the C++ Standard Library
          • including full support for C++11 and C++14
      • compiler-rt
        • provides highly tuned implementations of the low-level code generator
      • MLIR
        • a novel approach to building reusable and extensible compiler infrastructure
      • OpenMP
        • an OpenMP runtime for use with the OpenMP implementation in Clang
      • polly
        • a suite of cache-locality optimizations as well as auto-parallelism and vectorization using a polyhedral model
      • libclc
        • implement the OpenCL standard library
      • klee
        • implements a "symbolic virtual machine" which uses a theorem prover to try to evaluate all dynamic paths through a program in an effort to find bugs and to prove properties of functions
      • LLD
        • a new linker
          • a drop-in replacement for system linkers and runs much faster
    • 资料
    • 相关
      • 概念
        • IR=Intermediate Representation=中间表示层

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