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Duncan P. N. Exon Smith d636b881bb Adapt lldb to a40db5502b 
The bots just told me about a place in LLDB I missed in
a40db5502b when changing
`HeaderSearch::LoadedModuleMaps`, but I think this will fix it.
2020-12-14 14:41:15 -08:00
.github/workflows [PATCH] github actions: Pepare main branch for being read/write 2020-12-06 22:16:36 -08:00
clang Add comment to closing brace of anonymous namespace, NFC 2020-12-14 14:38:12 -08:00
clang-tools-extra Lex: Migrate HeaderSearch::LoadedModuleMaps to FileEntryRef 2020-12-14 14:35:11 -08:00
compiler-rt [sanitizer] Restrict querying VM size on Darwin only to iOS devices 2020-12-14 10:48:48 -08:00
debuginfo-tests Include BuiltinAttributes.h in llvm-prettyprinters/gdb/mlir-support.cpp 2020-12-04 15:57:05 -06:00
flang [flang] Fix copy elision assumption. 2020-12-14 14:07:05 -06:00
libc [libc][Obvious] Include <fenv.h> from DummyFenv.h. 2020-12-14 08:51:54 -08:00
libclc
libcxx [libc++] Refactor allocate_shared to use an allocation guard 2020-12-14 17:10:05 -05:00
libcxxabi [libc++abi] Don't try calling __libcpp_aligned_free when aligned allocation is disabled 2020-12-01 17:45:14 -05:00
libunwind [libunwind] Multiple preprocessor fixes on PowerPC* 2020-11-23 19:07:21 -08:00
lld [Wasm][LTO][NPM] Use NPM for LTO with ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER 2020-12-14 10:15:13 -08:00
lldb Adapt lldb to a40db5502b 2020-12-14 14:41:15 -08:00
llvm [LoopIdiomRecognize] Teach detectShiftUntilZeroIdiom to recognize loops where the counter is decrementing. 2020-12-14 14:25:05 -08:00
mlir [mlir][OpDefGen] Add support for generating local functions for shared utilities 2020-12-14 14:21:30 -08:00
openmp [OpenMP] Add time profiling for libomptarget 2020-12-11 18:53:37 -08:00
parallel-libs
polly [Polly] Consider InvalidContext to determine partial READ. 2020-12-10 22:25:19 -06:00
pstl
utils/arcanist
.arcconfig Set the target branch for arc land to main 2020-12-07 21:57:32 +00:00
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CONTRIBUTING.md
README.md

README.md

The LLVM Compiler Infrastructure

This directory and its sub-directories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.

The README briefly describes how to get started with building LLVM. For more information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.

Getting Started with the LLVM System

Taken from https://llvm.org/docs/GettingStarted.html.

Overview

Welcome to the LLVM project!

The LLVM project has multiple components. The core of the project is itself called "LLVM". This contains all of the tools, libraries, and header files needed to process intermediate representations and converts it into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer. It also contains basic regression tests.

C-like languages use the Clang front end. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.

Other components include: the libc++ C++ standard library, the LLD linker, and more.

Getting the Source Code and Building LLVM

The LLVM Getting Started documentation may be out of date. The Clang Getting Started page might have more accurate information.

This is an example work-flow and configuration to get and build the LLVM source:

  1. Checkout LLVM (including related sub-projects like Clang):

    • git clone https://github.com/llvm/llvm-project.git

    • Or, on windows, git clone --config core.autocrlf=false https://github.com/llvm/llvm-project.git

  2. Configure and build LLVM and Clang:

    • cd llvm-project

    • mkdir build

    • cd build

    • cmake -G <generator> [options] ../llvm

      Some common build system generators are:

      • Ninja --- for generating Ninja build files. Most llvm developers use Ninja.
      • Unix Makefiles --- for generating make-compatible parallel makefiles.
      • Visual Studio --- for generating Visual Studio projects and solutions.
      • Xcode --- for generating Xcode projects.

      Some Common options:

      • -DLLVM_ENABLE_PROJECTS='...' --- semicolon-separated list of the LLVM sub-projects you'd like to additionally build. Can include any of: clang, clang-tools-extra, libcxx, libcxxabi, libunwind, lldb, compiler-rt, lld, polly, or debuginfo-tests.

        For example, to build LLVM, Clang, libcxx, and libcxxabi, use -DLLVM_ENABLE_PROJECTS="clang;libcxx;libcxxabi".

      • -DCMAKE_INSTALL_PREFIX=directory --- Specify for directory the full path name of where you want the LLVM tools and libraries to be installed (default /usr/local).

      • -DCMAKE_BUILD_TYPE=type --- Valid options for type are Debug, Release, RelWithDebInfo, and MinSizeRel. Default is Debug.

      • -DLLVM_ENABLE_ASSERTIONS=On --- Compile with assertion checks enabled (default is Yes for Debug builds, No for all other build types).

    • cmake --build . [-- [options] <target>] or your build system specified above directly.

      • The default target (i.e. ninja or make) will build all of LLVM.

      • The check-all target (i.e. ninja check-all) will run the regression tests to ensure everything is in working order.

      • CMake will generate targets for each tool and library, and most LLVM sub-projects generate their own check-<project> target.

      • Running a serial build will be slow. To improve speed, try running a parallel build. That's done by default in Ninja; for make, use the option -j NNN, where NNN is the number of parallel jobs, e.g. the number of CPUs you have.

    • For more information see CMake

Consult the Getting Started with LLVM page for detailed information on configuring and compiling LLVM. You can visit Directory Layout to learn about the layout of the source code tree.