6 If you are using a released version of LLVM, see `the download page
7 <http://llvm.org/releases/>`_ to find your documentation.
9 The LLVM compiler infrastructure supports a wide range of projects, from
10 industrial strength compilers to specialized JIT applications to small
13 Similarly, documentation is broken down into several high-level groupings
14 targeted at different audiences:
16 LLVM Design & Overview
17 ======================
19 Several introductory papers and presentations.
27 Defines the LLVM intermediate representation.
29 `Introduction to the LLVM Compiler`__
30 Presentation providing a users introduction to LLVM.
32 .. __: http://llvm.org/pubs/2008-10-04-ACAT-LLVM-Intro.html
35 Book chapter providing a compiler hacker's introduction to LLVM.
37 .. __: http://www.aosabook.org/en/llvm.html
40 `LLVM: A Compilation Framework for Lifelong Program Analysis & Transformation`__
43 .. __: http://llvm.org/pubs/2004-01-30-CGO-LLVM.html
45 `LLVM: An Infrastructure for Multi-Stage Optimization`__
46 More details (quite old now).
48 .. __: http://llvm.org/pubs/2002-12-LattnerMSThesis.html
50 `Publications mentioning LLVM <http://llvm.org/pubs>`_
56 For those new to the LLVM system.
58 NOTE: If you are a user who is only interested in using LLVM-based
59 compilers, you should look into `Clang <http://clang.llvm.org>`_ or
60 `DragonEgg <http://dragonegg.llvm.org>`_ instead. The documentation here is
61 intended for users who have a need to work with the intermediate LLVM
78 SphinxQuickstartTemplate
86 MCJITDesignAndImplementation
89 Discusses how to get up and running quickly with the LLVM infrastructure.
90 Everything from unpacking and compilation of the distribution to execution
94 An addendum to the main Getting Started guide for those using the `CMake
95 build system <http://www.cmake.org>`_.
97 :doc:`HowToBuildOnARM`
98 Notes on building and testing LLVM/Clang on ARM.
100 :doc:`HowToCrossCompileLLVM`
101 Notes on cross-building and testing LLVM/Clang.
103 :doc:`GettingStartedVS`
104 An addendum to the main Getting Started guide for those using Visual Studio
107 :doc:`tutorial/index`
108 Tutorials about using LLVM. Includes a tutorial about making a custom
111 :doc:`LLVM Command Guide <CommandGuide/index>`
112 A reference manual for the LLVM command line utilities ("man" pages for LLVM
116 A list of optimizations and analyses implemented in LLVM.
119 A list of common questions and problems and their solutions.
121 :doc:`Release notes for the current release <ReleaseNotes>`
122 This describes new features, known bugs, and other limitations.
124 :doc:`HowToSubmitABug`
125 Instructions for properly submitting information about any bugs you run into
128 :doc:`SphinxQuickstartTemplate`
129 A template + tutorial for writing new Sphinx documentation. It is meant
130 to be read in source form.
132 :doc:`LLVM Testing Infrastructure Guide <TestingGuide>`
133 A reference manual for using the LLVM testing infrastructure.
135 `How to build the C, C++, ObjC, and ObjC++ front end`__
136 Instructions for building the clang front-end from source.
138 .. __: http://clang.llvm.org/get_started.html
141 Definition of acronyms, terms and concepts used in LLVM.
143 :doc:`HowToAddABuilder`
144 Instructions for adding new builder to LLVM buildbot master.
147 A reference guide for using LLVM's YAML I/O library.
150 Answers to some very frequent questions about LLVM's most frequently
151 misunderstood instruction.
153 Programming Documentation
154 =========================
156 For developers of applications which use LLVM as a library.
166 HowToSetUpLLVMStyleRTTI
170 :doc:`LLVM Language Reference Manual <LangRef>`
171 Defines the LLVM intermediate representation and the assembly form of the
175 Information about LLVM's concurrency model.
177 :doc:`ProgrammersManual`
178 Introduction to the general layout of the LLVM sourcebase, important classes
179 and APIs, and some tips & tricks.
182 LLVM-specific extensions to tools and formats LLVM seeks compatibility with.
185 Provides information on using the command line parsing library.
187 :doc:`CodingStandards`
188 Details the LLVM coding standards and provides useful information on writing
191 :doc:`HowToSetUpLLVMStyleRTTI`
192 How to make ``isa<>``, ``dyn_cast<>``, etc. available for clients of your
196 Look here to see how to add instructions and intrinsics to LLVM.
198 `Doxygen generated documentation <http://llvm.org/doxygen/>`_
199 (`classes <http://llvm.org/doxygen/inherits.html>`_)
200 (`tarball <http://llvm.org/doxygen/doxygen.tar.gz>`_)
202 `ViewVC Repository Browser <http://llvm.org/viewvc/>`_
205 :doc:`CompilerWriterInfo`
206 A list of helpful links for compiler writers.
208 Subsystem Documentation
209 =======================
211 For API clients and LLVM developers.
218 BlockFrequencyTerminology
242 CoverageMappingFormat
244 :doc:`WritingAnLLVMPass`
245 Information on how to write LLVM transformations and analyses.
247 :doc:`WritingAnLLVMBackend`
248 Information on how to write LLVM backends for machine targets.
251 The design and implementation of the LLVM code generator. Useful if you are
252 working on retargetting LLVM to a new architecture, designing a new codegen
253 pass, or enhancing existing components.
255 :doc:`TableGen <TableGen/index>`
256 Describes the TableGen tool, which is used heavily by the LLVM code
260 Information on how to write a new alias analysis implementation or how to
261 use existing analyses.
263 :doc:`GarbageCollection`
264 The interfaces source-language compilers should use for compiling GC'd
267 :doc:`Source Level Debugging with LLVM <SourceLevelDebugging>`
268 This document describes the design and philosophy behind the LLVM
269 source-level debugger.
272 This document describes the current status of vectorization in LLVM.
274 :doc:`ExceptionHandling`
275 This document describes the design and implementation of exception handling
279 Automatic bug finder and test-case reducer description and usage
283 This describes the file format and encoding used for LLVM "bc" files.
285 :doc:`System Library <SystemLibrary>`
286 This document describes the LLVM System Library (``lib/System``) and
287 how to keep LLVM source code portable
289 :doc:`LinkTimeOptimization`
290 This document describes the interface between LLVM intermodular optimizer
291 and the linker and its design
294 How to build your programs with link-time optimization on Linux.
296 :doc:`DebuggingJITedCode`
297 How to debug JITed code with GDB.
299 :doc:`MCJITDesignAndImplementation`
300 Describes the inner workings of MCJIT execution engine.
302 :doc:`BranchWeightMetadata`
303 Provides information about Branch Prediction Information.
305 :doc:`BlockFrequencyTerminology`
306 Provides information about terminology used in the ``BlockFrequencyInfo``
309 :doc:`SegmentedStacks`
310 This document describes segmented stacks and how they are used in LLVM.
312 :doc:`MarkedUpDisassembly`
313 This document describes the optional rich disassembly output syntax.
315 :doc:`HowToUseAttributes`
316 Answers some questions about the new Attributes infrastructure.
319 This document describes using the NVPTX back-end to compile GPU kernels.
322 This document describes how to use the R600 back-end.
325 LLVM support for mapping instruction addresses to the location of
326 values and allowing code to be patched.
329 LLVM's support for generating NEON instructions on big endian ARM targets is
330 somewhat nonintuitive. This document explains the implementation and rationale.
332 :doc:`CoverageMappingFormat`
333 This describes the format and encoding used for LLVM’s code coverage mapping.
335 Development Process Documentation
336 =================================
338 Information about LLVM's development process.
352 :doc:`DeveloperPolicy`
353 The LLVM project's policy towards developers and their contributions.
356 How-to guide and templates for new projects that *use* the LLVM
357 infrastructure. The templates (directory organization, Makefiles, and test
358 tree) allow the project code to be located outside (or inside) the ``llvm/``
359 tree, while using LLVM header files and libraries.
362 Describes the LLVMBuild organization and files used by LLVM to specify
363 component descriptions.
366 Describes how the LLVM makefiles work and how to use them.
368 :doc:`HowToReleaseLLVM`
369 This is a guide to preparing LLVM releases. Most developers can ignore it.
371 :doc:`ReleaseProcess`
372 This is a guide to validate a new release, during the release process. Most developers can ignore it.
375 Advice on packaging LLVM into a distribution.
378 Describes how to use the Phabricator code review tool hosted on
379 http://reviews.llvm.org/ and its command line interface, Arcanist.
384 LLVM has a thriving community of friendly and helpful developers.
385 The two primary communication mechanisms in the LLVM community are mailing
391 If you can't find what you need in these docs, try consulting the mailing
394 `Developer's List (llvmdev)`__
395 This list is for people who want to be included in technical discussions of
396 LLVM. People post to this list when they have questions about writing code
397 for or using the LLVM tools. It is relatively low volume.
399 .. __: http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
401 `Commits Archive (llvm-commits)`__
402 This list contains all commit messages that are made when LLVM developers
403 commit code changes to the repository. It also serves as a forum for
404 patch review (i.e. send patches here). It is useful for those who want to
405 stay on the bleeding edge of LLVM development. This list is very high
408 .. __: http://lists.cs.uiuc.edu/pipermail/llvm-commits/
410 `Bugs & Patches Archive (llvmbugs)`__
411 This list gets emailed every time a bug is opened and closed. It is
412 higher volume than the LLVMdev list.
414 .. __: http://lists.cs.uiuc.edu/pipermail/llvmbugs/
416 `Test Results Archive (llvm-testresults)`__
417 A message is automatically sent to this list by every active nightly tester
418 when it completes. As such, this list gets email several times each day,
419 making it a high volume list.
421 .. __: http://lists.cs.uiuc.edu/pipermail/llvm-testresults/
423 `LLVM Announcements List (llvm-announce)`__
424 This is a low volume list that provides important announcements regarding
425 LLVM. It gets email about once a month.
427 .. __: http://lists.cs.uiuc.edu/mailman/listinfo/llvm-announce
432 Users and developers of the LLVM project (including subprojects such as Clang)
433 can be found in #llvm on `irc.oftc.net <irc://irc.oftc.net/llvm>`_.
435 This channel has several bots.
439 * llvmbb - Bot for the main LLVM buildbot master.
440 http://lab.llvm.org:8011/console
441 * bb-chapuni - An individually run buildbot master. http://bb.pgr.jp/console
442 * smooshlab - Apple's internal buildbot master.
444 * robot - Bugzilla linker. %bug <number>
446 * clang-bot - A `geordi <http://www.eelis.net/geordi/>`_ instance running
447 near-trunk clang instead of gcc.