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<h1>Documentation for the LLVM System at SVN head</h1>

<p class="doc_warning">If you are using a released version of LLVM,
see <a href="http://llvm.org/releases/">the download page</a> to find
your documentation.</p>

<table class="layout" width="95%"><tr class="layout"><td class="left">
<ul>
  <li><a href="#llvmdesign">LLVM Design</a></li>
  <li><a href="/pubs/">LLVM Publications</a></li>
  <li><a href="#userguide">LLVM User Guides</a></li>
  <li><a href="#llvmprog">General LLVM Programming Documentation</a></li>
  <li><a href="#subsystems">LLVM Subsystem Documentation</a></li>
  <li><a href="#maillist">LLVM Mailing Lists</a></li>
</ul>
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<div class="doc_author">
  <p>Written by <a href="http://llvm.org/">The LLVM Team</a></p>
</div>

<!--=======================================================================-->
<h2><a name="llvmdesign">LLVM Design &amp; Overview</a></h2>
<!--=======================================================================-->

<ul>
<li><a href="LangRef.html">LLVM Language Reference Manual</a> - Defines the LLVM
intermediate representation.</li>
<li><a href="http://llvm.org/pubs/2008-10-04-ACAT-LLVM-Intro.html">Introduction to the LLVM Compiler </a> - Presentation providing a users introduction to LLVM.</li>
<li><a href="http://www.aosabook.org/en/llvm.html">Intro to LLVM</a> - book chapter providing a compiler hacker's introduction to LLVM.</li>
<li><a href="http://llvm.org/pubs/2004-01-30-CGO-LLVM.html">LLVM: A Compilation Framework for
Lifelong Program Analysis &amp; Transformation</a> - Design overview.</li>
<li><a href="http://llvm.org/pubs/2002-12-LattnerMSThesis.html">LLVM: An Infrastructure for
Multi-Stage Optimization</a> - More details (quite old now).</li>
<li><a href="GetElementPtr.html">GetElementPtr FAQ</a> - Answers to some very
frequent questions about LLVM's most frequently misunderstood instruction.</li>
</ul>

<!--=======================================================================-->
<h2><a name="userguide">LLVM User Guides</a></h2>
<!--=======================================================================-->

<ul>
<li><a href="GettingStarted.html">The LLVM Getting Started Guide</a> -
Discusses how to get up and running quickly with the LLVM infrastructure.
Everything from unpacking and compilation of the distribution to execution of
some tools.</li>

<li><a href="GettingStartedVS.html">Getting Started with the LLVM System using
Microsoft Visual Studio</a> - An addendum to the main Getting Started guide for
those using Visual Studio on Windows.</li>

<li><a href="tutorial/">LLVM Tutorial</a> - A walk through the process of using
LLVM for a custom language, and the facilities LLVM offers in tutorial form.</li>
<li><a href="DeveloperPolicy.html">Developer Policy</a> - The LLVM project's
policy towards developers and their contributions.</li>

<li><a href="CommandGuide/index.html">LLVM Command Guide</a> - A reference
manual for the LLVM command line utilities ("man" pages for LLVM tools).<br>
Current tools:
 <a href="/cmds/llvm-ar.html">llvm-ar</a>,
 <a href="/cmds/llvm-as.html">llvm-as</a>,
 <a href="/cmds/llvm-dis.html">llvm-dis</a>,
 <a href="/cmds/llvm-extract.html">llvm-extract</a>,
 <a href="/cmds/llvm-ld.html">llvm-ld</a>,
 <a href="/cmds/llvm-link.html">llvm-link</a>,
 <a href="/cmds/llvm-nm.html">llvm-nm</a>,
 <a href="/cmds/llvm-prof.html">llvm-prof</a>,
 <a href="/cmds/llvm-ranlib.html">llvm-ranlib</a>,
 <a href="/cmds/opt.html">opt</a>,
 <a href="/cmds/llc.html">llc</a>,
 <a href="/cmds/lli.html">lli</a>,
 <a href="/cmds/llvmc.html">llvmc</a>
 <a href="/cmds/llvmgcc.html">llvm-gcc</a>,
 <a href="/cmds/llvmgxx.html">llvm-g++</a>,
 <a href="/cmds/bugpoint.html">bugpoint</a>,
 <a href="/cmds/llvm-bcanalyzer.html">llvm-bcanalyzer</a>,
</li>

<li><a href="Passes.html">LLVM's Analysis and Transform Passes</a> - A list of
optimizations and analyses implemented in LLVM.</li>

<li><a href="FAQ.html">Frequently Asked Questions</a> - A list of common
questions and problems and their solutions.</li>

<li><a href="ReleaseNotes.html">Release notes for the current release</a>
- This describes new features, known bugs, and other limitations.</li>

<li><a href="HowToSubmitABug.html">How to Submit A Bug Report</a> -
Instructions for properly submitting information about any bugs you run into in
the LLVM system.</li>

<li><a href="TestingGuide.html">LLVM Testing Infrastructure Guide</a> - A reference
manual for using the LLVM testing infrastructure.</li>

<li><a href="GCCFEBuildInstrs.html">How to build the Ada/C/C++/Fortran front-ends</a> -
Instructions for building gcc front-ends from source.</li>

<li><a href="Packaging.html">Packaging guide</a> - Advice on packaging
LLVM into a distribution.</li>

<li><a href="Lexicon.html">The LLVM Lexicon</a> - Definition of acronyms, terms
and concepts used in LLVM.</li>

<li><a name="irc">You can probably find help on the unofficial LLVM IRC
channel</a>.  We often are on irc.oftc.net in the #llvm channel.  If you are
using the mozilla browser, and have chatzilla installed, you can <a
href="irc://irc.oftc.net/llvm">join #llvm on irc.oftc.net</a> directly.</li>

</ul>


<!--=======================================================================-->
<h2><a name="llvmprog">General LLVM Programming Documentation</a></h2>
<!--=======================================================================-->

<ul>
<li><a href="LangRef.html">LLVM Language Reference Manual</a> - Defines the LLVM
intermediate representation and the assembly form of the different nodes.</li>

<li><a href="ProgrammersManual.html">The LLVM Programmers Manual</a> -
Introduction to the general layout of the LLVM sourcebase, important classes
and APIs, and some tips &amp; tricks.</li>

<li><a href="Projects.html">LLVM Project Guide</a> - How-to guide and
templates for new projects that <em>use</em> the LLVM infrastructure.  The
templates (directory organization, Makefiles, and test tree) allow the project
code to be located outside (or inside) the <tt>llvm/</tt> tree, while using LLVM
header files and libraries.</li>

<li><a href="MakefileGuide.html">LLVM Makefile Guide</a> - Describes how the
LLVM makefiles work and how to use them.</li>

<li><a href="CommandLine.html">CommandLine library Reference Manual</a> -
Provides information on using the command line parsing library.</li>

<li><a href="CodingStandards.html">LLVM Coding standards</a> -
Details the LLVM coding standards and provides useful information on writing
efficient C++ code.</li>

<li><a href="ExtendingLLVM.html">Extending LLVM</a> - Look here to see how
to add instructions and intrinsics to LLVM.</li>

<li><a href="UsingLibraries.html">Using LLVM Libraries</a> - Look here to
understand how to use the libraries produced when LLVM is compiled.</li>

<li><a href="HowToReleaseLLVM.html">How To Release LLVM To The Public</a> - This
is a guide to preparing LLVM releases. Most developers can ignore it.</li>


<li><a href="http://llvm.org/doxygen/">Doxygen generated
documentation</a> (<a
href="http://llvm.org/doxygen/inherits.html">classes</a>)

(<a href="http://llvm.org/doxygen/doxygen.tar.gz">tarball</a>)
</li>

<li><a href="http://llvm.org/viewvc/">ViewVC Repository Browser</a></li>

</ul>

<!--=======================================================================-->
<h2><a name="subsystems">LLVM Subsystem Documentation</a></h2>
<!--=======================================================================-->

<ul>

<li><a href="WritingAnLLVMPass.html">Writing an LLVM Pass</a> - Information
on how to write LLVM transformations and analyses.</li>

<li><a href="WritingAnLLVMBackend.html">Writing an LLVM Backend</a> - Information
on how to write LLVM backends for machine targets.</li>

<li><a href="CodeGenerator.html">The LLVM Target-Independent Code
Generator</a> - The design and implementation of the LLVM code generator.
Useful if you are working on retargetting LLVM to a new architecture, designing
a new codegen pass, or enhancing existing components.</li>

<li><a href="TableGenFundamentals.html">TableGen Fundamentals</a> -
Describes the TableGen tool, which is used heavily by the LLVM code
generator.</li>

<li><a href="AliasAnalysis.html">Alias Analysis in LLVM</a> - Information
on how to write a new alias analysis implementation or how to use existing
analyses.</li>

<li><a href="GarbageCollection.html">Accurate Garbage Collection with
LLVM</a> - The interfaces source-language compilers should use for compiling
GC'd programs.</li>

<li><a href="SourceLevelDebugging.html">Source Level Debugging with
LLVM</a> - This document describes the design and philosophy behind the LLVM
source-level debugger.</li>

<li><a href="ExceptionHandling.html">Zero Cost Exception handling in LLVM</a>
- This document describes the design and implementation of exception handling
in LLVM.</li>

<li><a href="Bugpoint.html">Bugpoint</a> - automatic bug finder and test-case
reducer description and usage information.</li>

<li><a href="CompilerDriverTutorial.html">Compiler Driver (llvmc) Tutorial</a>
- This document is a tutorial introduction to the usage and
configuration of the LLVM compiler driver tool, <tt>llvmc</tt>.</li>

<li><a href="CompilerDriver.html">Compiler Driver (llvmc)
Reference</a> - This document describes the design and configuration
of <tt>llvmc</tt> in more detail.</li>

<li><a href="BitCodeFormat.html">LLVM Bitcode File Format</a> - This describes
the file format and encoding used for LLVM "bc" files.</li>

<li><a href="SystemLibrary.html">System Library</a> - This document describes
the LLVM System Library (<tt>lib/System</tt>) and how to keep LLVM source code
portable</li>

<li><a href="LinkTimeOptimization.html">Link Time Optimization</a> - This
document describes the interface between LLVM intermodular optimizer and
the linker and its design</li>

<li><a href="GoldPlugin.html">The LLVM gold plugin</a> - How to build your
programs with link-time optimization on Linux.</li>

<li><a href="DebuggingJITedCode.html">The GDB JIT interface</a> - How to debug
JITed code with GDB.</li>

<li><a href="BranchWeightMetadata.html">Branch Weight Metadata</a> - Provides
information about Branch Prediction Information.</li>

</ul>


<!--=======================================================================-->
<h2><a name="maillist">LLVM Mailing Lists</a></h2>
<!--=======================================================================-->

<ul>
<li>The <a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvm-announce">
LLVM Announcements List</a>: This is a low volume list that provides important
announcements regarding LLVM.  It gets email about once a month.</li>

<li>The <a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">Developer's
List</a>: 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.</li>

<li>The <a href="http://lists.cs.uiuc.edu/pipermail/llvmbugs/">Bugs &amp;
Patches Archive</a>: 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
volume than the LLVMdev list.</li>

<li>The <a href="http://lists.cs.uiuc.edu/pipermail/llvm-commits/">Commits
Archive</a>: 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.</li>

<li>The <a href="http://lists.cs.uiuc.edu/pipermail/llvm-testresults/">
Test Results Archive</a>: 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.</li>

</ul>

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