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Getting Involved
LLVM welcomes contributions of all kinds. To get started, please review the following topics:
.. contents::
.. toctree::
An overview on how to contribute to LLVM.
The LLVM project's policy towards developers and their contributions.
The LLVM project's code-review process.
The LLVM support policy for core and non-core components.
A template + tutorial for writing new Sphinx documentation. It is meant
to be read in source form.
Describes how to use the Phabricator code review tool hosted on and its command line interface, Arcanist.
Instructions for properly submitting information about any bugs you run into
in the LLVM system.
Describes how bugs are reported, triaged and closed.
Details the LLVM coding standards and provides useful information on writing
efficient C++ code.
Describes how to use ``git bisect`` on LLVM's repository.
Collection of policies around the git repositories.
.. _development-process:
Development Process
Information about LLVM's development process.
.. toctree::
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.
This is a guide to preparing LLVM releases. Most developers can ignore it.
This is a guide to validate a new release, during the release process. Most developers can ignore it.
Instructions for adding new builder to LLVM buildbot master.
Advice on packaging LLVM into a distribution.
:doc:`Release notes for the current release <ReleaseNotes>`
This describes new features, known bugs, and other limitations.
.. _mailing-lists:
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
.. __:
`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:
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:
.. list-table:: LLVM regular sync-up calls
:widths: 25 25 25 25
:header-rows: 1
* - 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 <>`__
Users and developers of the LLVM project (including subprojects such as Clang)
can be found in #llvm on ` <irc://>`_.
This channel has several bots.
* Buildbot reporters
* llvmbb - Bot for the main LLVM buildbot master.
* 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-social-events:
Meetups and social events
.. toctree::
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:
.. _community-proposals:
Community wide proposals
Proposals for massive changes in how the community behaves and how the work flow
can be better.
.. toctree::
Proposal to adopt a code of conduct on the LLVM social spaces (lists, events,
IRC, etc).
Proposal to move from SVN/Git to GitHub.
Design doc for a redesign of the Bugpoint tool.
Proposal to add a libc implementation under the LLVM project.
Proposals for additional benchmarks/programs for llvm's test-suite.
Proposal to change the variable names coding standard.
Proposal to model the process and upgrade the infrastructure of LLVM's Loop Vectorizer.
Proposal for predicated vector instructions in LLVM.