Documentation for the LLVM System

If you are using a released version of LLVM, +see the download page to find +your documentation.

Written by The LLVM Team

LLVM Design & Overview

LLVM Language Reference Manual - Defines the LLVM intermediate representation.
Introduction to the LLVM Compiler Infrastructure - Presentation describing LLVM.
The LLVM Compiler Framework and -Infrastructure Tutorial - Tutorial for writing passes, exploring the system.
Introduction to the LLVM Compiler - Presentation providing a users introduction to LLVM.
Intro to LLVM - book chapter providing a compiler hacker's introduction to LLVM.
LLVM: A Compilation Framework for Lifelong Program Analysis & Transformation - Design overview.
LLVM: An Infrastructure for -Multi-Stage Optimization - More details (somewhat old now).
GetElementPtr FAQ - Answers to some very +frequent questions about LLVM's most frequently misunderstood instruction.

LLVM User Guides

LLVM CMake guide - An addendum to the main Getting +Started guide for those using the CMake build +system. +
Getting Started with the LLVM System using Microsoft Visual Studio - An addendum to the main Getting Started guide for those using Visual Studio on Windows.
LLVM Tutorial - A walk through the process of using +LLVM for a custom language, and the facilities LLVM offers in tutorial form.
Developer Policy - The LLVM project's +policy towards developers and their contributions.
LLVM Command Guide - A reference -manual for the LLVM command line utilities ("man" pages for LLVM tools).
-Current tools: - llvm-ar, - llvm-ranlib, - llvm-as, - llvm-dis, - opt, - llc, - lli, - llvm-link, - llvm-nm, - llvm-prof, - llvmgcc, - llvmgxx, - gccas, - gccld, - stkrc, - bugpoint, - llvm-extract, - llvm-bcanalyzer, - llvmc -
LLVM's Analysis and Transform Passes - A list of +optimizations and analyses implemented in LLVM.
Frequently Asked Questions - A list of common questions and problems and their solutions.
Release notes for the current release +
Release notes for the current release - This describes new features, known bugs, and other limitations.
How to Submit A Bug Report - Instructions for properly submitting information about any bugs you run into in the LLVM system.
LLVM Test Suite Guide - A reference -manual for using the LLVM test suite.
LLVM Testing Infrastructure Guide - A reference +manual for using the LLVM testing infrastructure.
How to build the Ada/C/C++/Fortran front-ends - +Instructions for building gcc front-ends from source.
How to build the C/C++ front-end - -Instructions for building the front-end from source.
Packaging guide - Advice on packaging +LLVM into a distribution.
The LLVM Lexicon - Definition of acronyms, terms and concepts used in LLVM.
You can probably find help on the unofficial LLVM IRC -channel. We often are on irc.oftc.net in the #llvm channel. If you are -using the mozilla browser, and have chatzilla installed, you can You can probably find help on the unofficial LLVM IRC +channel. We often are on irc.oftc.net in the #llvm channel. If you are +using the mozilla browser, and have chatzilla installed, you can join #llvm on irc.oftc.net directly.
How To Add Your Build Configuration +To LLVM Buildbot Infrastructure - Instructions for adding new builder to +LLVM buildbot master.

General LLVM Programming Documentation

LLVM Programming Documentation

LLVM Project Guide - 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.
LLVM Makefile Guide - Describes how the -LLVM makefiles work and how to use them.
CommandLine library Reference Manual - Provides information on using the command line parsing library.
Extending LLVM - Look here to see how +
Extending LLVM - Look here to see how to add instructions and intrinsics to LLVM.
Using LLVM Libraries - Look here to -understand how to use the libraries produced when LLVM is compiled.
How To Release LLVM To The Public - This -is a guide to preparing LLVM releases. Most developers can ignore it.
Doxygen generated +
Doxygen generated documentation (classes) (tarball)
CVSWeb CVS Tree -Browser
ViewVC Repository Browser

LLVM Subsystem Documentation

The Stacker Chronicles - This document -describes both the Stacker language and LLVM frontend, but also some details -about LLVM useful for those writing front-ends.
Accurate Garbage Collection with LLVM - The interfaces source-language compilers should use for compiling GC'd programs.
Zero Cost Exception handling in LLVM +- This document describes the design and implementation of exception handling +in LLVM.
Bugpoint - automatic bug finder and test-case reducer description and usage information.
Compiler Driver (llvmc) - This document -describes the design and configuration of the LLVM compiler driver tool, -llvmc.
LLVM Bytecode File Format
LLVM Bitcode File Format - This describes +the file format and encoding used for LLVM "bc" files.
System Library - This document describes the LLVM System Library (lib/System) and how to keep LLVM source code @@ -218,35 +203,67 @@ portable
The LLVM gold plugin - How to build your +programs with link-time optimization on Linux.
The GDB JIT interface - How to debug +JITed code with GDB.
Branch Weight Metadata - Provides +information about Branch Prediction Information.

+ +

LLVM Development Process Documentation

+ + +

LLVM Project Guide - 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.
LLVMBuild Documentation - Describes the +LLVMBuild organization and files used by LLVM to specify component +descriptions.
LLVM Makefile Guide - Describes how the +LLVM makefiles work and how to use them.
How To Release LLVM To The Public - This +is a guide to preparing LLVM releases. Most developers can ignore it.

LLVM Mailing Lists

The -LLVM Announcements List: This is a low volume list that provides important +
The +LLVM Announcements List: This is a low volume list that provides important announcements regarding LLVM. It gets email about once a month.
The Developer's -List: 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 +
The Developer's +List: 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.
The Bugs & +
The Bugs & Patches Archive: This list gets emailed every time a bug is opened and -closed, and when people submit patches to be included in LLVM. It is higher +closed, and when people submit patches to be included in LLVM. It is higher volume than the LLVMdev list.
The CVS Commits -Archive: This list contains all commit messages that are made when LLVM -developers commit code changes to the CVS archive. It is useful for those who +
The Commits +Archive: This list contains all commit messages that are made when LLVM +developers commit code changes to the repository. It is useful for those who want to stay on the bleeding edge of LLVM development. This list is very high volume.
The +
The Test Results Archive: 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.

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