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.

• 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.

• LLVM GitHub User Guide

  Describes how to use the llvm-project repository and code reviews on GitHub.

• 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.

• Release notes for the current release

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

Forums & Mailing Lists

If you can’t find what you need in these docs, try consulting the Discourse forums. There are also commit mailing lists for all commits to the LLVM Project. The LLVM Community Code of Conduct applies to all these forums and mailing lists.

• LLVM Discourse

  The forums for all things LLVM and related sub-projects. There are categories and subcategories for a wide variety of areas within LLVM. You can also view tags or search for a specific topic.

• 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.

• LLVM Announcements

  If you just want project-wide announcements such as releases, developers meetings, or blog posts, then you should check out the Announcement category on LLVM Discourse.

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. The LLVM Community Code of Conduct applies to all online sync-ups.

If you’d like to organize a new sync-up, please add the info in the table below. Please also create a calendar event for it and invite calendar@llvm.org to the event, so that it’ll show up on the LLVM community calendar. Please see Guidance on what to put into LLVM community calendar invites for more guidance on what to add to your calendar invite.

LLVM regular sync-up calls

Topic	Frequency	Calendar link	Minutes/docs link
Loop Optimization Working Group	Every first Wednesday of the month	ics	Minutes/docs
RISC-V	Every 2 weeks on Thursday	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
flang	Multiple meeting series, documented here
OpenMP	Multiple meeting series, documented here
LLVM Alias Analysis	Every 4 weeks on Tuesdays	ics	Minutes/docs
LLVM Pointer Authentication	Every month on Mondays	ics	Minutes/docs
LLVM Embedded Toolchains	Every 4 weeks on Thursdays	ics gcal	Minutes/docs
Clang C and C++ Language Working Group	1st and 3rd Wednesday of the month		Minutes/docs
LLVM SPIR-V Backend Working Group	Every week on Monday		Meeting details/agenda
SYCL Upstream Working Group	Every 2 weeks on Mondays	gcal	Meeting details/agenda
Formal Semantics Working Group	Every 2 weeks on Mondays	gcal	Meeting notes
Vectorizer Improvement Working Group	3rd Tuesday of the month	ics	Meeting details/agenda:
LLVM Qualification Working Group	Monthly: 2nd Tuesday (EU/Asia) and 2nd Friday JST / Thursday (Americas)	ics gcal	Minutes/docs
MLIR C/C++ Frontend Working Group	Monthly, usually 1st Monday of the month	ics gcal	Minutes/docs
ClangIR Upstreaming Coordination Meeting	Every 2 weeks on Mondays	ics gcal
GlobalISel	Every 2nd Tuesday of the month	gcal	Meeting details/agenda
Clang Static Analysis Working Group