# Getting Involved

LLVM welcomes contributions of all kinds. To get started, please review the following topics:

Contributing to LLVM

  An overview on how to contribute to LLVM.

LLVM Developer Policy

  The LLVM project’s policy towards developers and their contributions.

LLVM Code-Review Policy and Practices

  The LLVM project’s code-review process.

LLVM Community Support Policy

  The LLVM support policy for core and non-core components.

Sphinx Quickstart Template

  A template + tutorial for writing new Sphinx documentation. It is meant to be read in source form.

Code Reviews with Phabricator

  Describes how to use the Phabricator code review tool hosted on http://reviews.llvm.org/ and its command line interface, Arcanist.

How to submit an LLVM bug report

  Instructions for properly submitting information about any bugs you run into in the LLVM system.

LLVM Bug Life Cycle

  Describes how bugs are reported, triaged and closed.

LLVM Coding Standards

  Details the LLVM coding standards and provides useful information on writing efficient C++ code.

Bisecting LLVM code

  Describes how to use `git bisect` on LLVM’s repository.

Policies on git repositories

  Collection of policies around the git repositories.

## Development Process

Information about LLVM’s development process.

Creating an LLVM Project

  How-to guide and templates for new projects that use the LLVM infrastructure. The templates (directory organization, Makefiles, and test tree) allow the project code to be located outside (or inside) the `llvm/` tree, while using LLVM header files and libraries.

How To Release LLVM To The Public

  This is a guide to preparing LLVM releases. Most developers can ignore it.

How To Validate a New Release

  This is a guide to validate a new release, during the release process. Most developers can ignore it.

How To Add Your Build Configuration To LLVM Buildbot Infrastructure

  Instructions for adding new builder to LLVM buildbot master.

Advice on Packaging LLVM

  Advice on packaging LLVM into a distribution.

Release notes for the current release

  This describes new features, known bugs, and other limitations.

## Mailing Lists

If you can’t find what you need in these docs, try consulting the mailing lists. In addition to the traditional mailing lists there is also a Discourse server available.

Developer’s List (llvm-dev)

  This list is for people who want to be included in technical discussions of LLVM. People post to this list when they have questions about writing code for or using the LLVM tools. It is relatively low volume.

Commits Archive (llvm-commits)

  This list contains all commit messages that are made when LLVM developers commit code changes to the repository. It also serves as a forum for patch review (i.e. send patches here). It is useful for those who want to stay on the bleeding edge of LLVM development. This list is very high volume.

Bugs & Patches Archive (llvm-bugs)

  This list gets emailed every time a bug is opened and closed. It is higher volume than the LLVM-dev list.

Test Results Archive (llvm-testresults)

  A message is automatically sent to this list by every active nightly tester when it completes. As such, this list gets email several times each day, making it a high volume list.

LLVM Announcements List (llvm-announce)

  This is a low volume list that provides important announcements regarding LLVM. It gets email about once a month.

## Online Sync-Ups

A number of regular calls are organized on specific topics. It should be expected that the range of topics will change over time. At the time of writing, the following sync-ups are organized:

LLVM regular sync-up calls
Topic | Frequency | Calendar link | Minutes/docs link
--- | --- | --- | ---
Loop Optimization Working Group | Every 2 weeks on Wednesday |  | Minutes/docs
RISC-V | Every 2 weeks on Thursday | ics gcal |
Scalable Vectors and Arm SVE | Monthly, every 3rd Tuesday | ics gcal | Minutes/docs
ML Guided Compiler Optimizations | Monthly |  | Minutes/docs
LLVM security group | Monthly, every 3rd Tuesday | ics gcal | Minutes/docs
CIRCT | Weekly, on Wednesday |  | Minutes/docs
MLIR design meetings | Weekly, on Thursdays |  | Minutes/docs
flang | Multiple meeting series, documented here |  |
OpenMP | Multiple meeting series, documented here |  |
LLVM Alias Analysis | Every 4 weeks on Tuesdays | ics | Minutes/docs
Windows/COFF related developments | Every 2 months on Thursday |  | Minutes/docs
Vector Predication | Every 2 weeks on Tuesdays, 3pm UTC |  | Minutes/docs
LLVM Pointer Authentication | Every month on Mondays | ics | Minutes/docs
MemorySSA in LLVM | Every 8 weeks on Mondays | ics gcal | Minutes/docs

## IRC

Users and developers of the LLVM project (including subprojects such as Clang) can be found in #llvm on irc.oftc.net.

This channel has several bots.

- Buildbot reporters

  - llvmbb - Bot for the main LLVM buildbot master. http://lab.llvm.org/buildbot/#/console

- robot - Bugzilla linker. %bug <number>

- clang-bot - A geordi instance running near-trunk clang instead of gcc.

In addition to the traditional IRC there is a Discord chat server available. To sign up, please use this invitation link.

## Meetups and social events

Besides developer meetings and conferences, there are several user groups called LLVM Socials. We greatly encourage you to join one in your city. Or start a new one if there is none:

How to start LLVM Social in your town

## Community wide proposals

Proposals for massive changes in how the community behaves and how the work flow can be better.

LLVM Community Code of Conduct

  Proposal to adopt a code of conduct on the LLVM social spaces (lists, events, IRC, etc).

Moving LLVM Projects to GitHub

  Proposal to move from SVN/Git to GitHub.

Bugpoint Redesign

  Design doc for a redesign of the Bugpoint tool.

Test-Suite Extensions

  Proposals for additional benchmarks/programs for llvm’s test-suite.

Variable Names Plan

  Proposal to change the variable names coding standard.

Vectorization Plan

  Proposal to model the process and upgrade the infrastructure of LLVM’s Loop Vectorizer.

Vector Predication Roadmap

  Proposal for predicated vector instructions in LLVM.