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
80 SphinxQuickstartTemplate
88 Frontend/PerformanceTips
89 MCJITDesignAndImplementation
95 Discusses how to get up and running quickly with the LLVM infrastructure.
96 Everything from unpacking and compilation of the distribution to execution
100 An addendum to the main Getting Started guide for those using the `CMake
101 build system <http://www.cmake.org>`_.
103 :doc:`HowToBuildOnARM`
104 Notes on building and testing LLVM/Clang on ARM.
106 :doc:`HowToCrossCompileLLVM`
107 Notes on cross-building and testing LLVM/Clang.
109 :doc:`GettingStartedVS`
110 An addendum to the main Getting Started guide for those using Visual Studio
113 :doc:`tutorial/index`
114 Tutorials about using LLVM. Includes a tutorial about making a custom
117 :doc:`LLVM Command Guide <CommandGuide/index>`
118 A reference manual for the LLVM command line utilities ("man" pages for LLVM
122 A list of optimizations and analyses implemented in LLVM.
125 A list of common questions and problems and their solutions.
127 :doc:`Release notes for the current release <ReleaseNotes>`
128 This describes new features, known bugs, and other limitations.
130 :doc:`HowToSubmitABug`
131 Instructions for properly submitting information about any bugs you run into
134 :doc:`SphinxQuickstartTemplate`
135 A template + tutorial for writing new Sphinx documentation. It is meant
136 to be read in source form.
138 :doc:`LLVM Testing Infrastructure Guide <TestingGuide>`
139 A reference manual for using the LLVM testing infrastructure.
141 `How to build the C, C++, ObjC, and ObjC++ front end`__
142 Instructions for building the clang front-end from source.
144 .. __: http://clang.llvm.org/get_started.html
147 Definition of acronyms, terms and concepts used in LLVM.
149 :doc:`HowToAddABuilder`
150 Instructions for adding new builder to LLVM buildbot master.
153 A reference guide for using LLVM's YAML I/O library.
156 Answers to some very frequent questions about LLVM's most frequently
157 misunderstood instruction.
159 :doc:`Frontend/PerformanceTips`
160 A collection of tips for frontend authors on how to generate IR
161 which LLVM is able to effectively optimize.
164 Programming Documentation
165 =========================
167 For developers of applications which use LLVM as a library.
177 HowToSetUpLLVMStyleRTTI
181 ScudoHardenedAllocator
183 :doc:`LLVM Language Reference Manual <LangRef>`
184 Defines the LLVM intermediate representation and the assembly form of the
188 Information about LLVM's concurrency model.
190 :doc:`ProgrammersManual`
191 Introduction to the general layout of the LLVM sourcebase, important classes
192 and APIs, and some tips & tricks.
195 LLVM-specific extensions to tools and formats LLVM seeks compatibility with.
198 Provides information on using the command line parsing library.
200 :doc:`CodingStandards`
201 Details the LLVM coding standards and provides useful information on writing
204 :doc:`HowToSetUpLLVMStyleRTTI`
205 How to make ``isa<>``, ``dyn_cast<>``, etc. available for clients of your
209 Look here to see how to add instructions and intrinsics to LLVM.
211 `Doxygen generated documentation <http://llvm.org/doxygen/>`_
212 (`classes <http://llvm.org/doxygen/inherits.html>`_)
213 (`tarball <http://llvm.org/doxygen/doxygen.tar.gz>`_)
215 `Documentation for Go bindings <http://godoc.org/llvm.org/llvm/bindings/go/llvm>`_
217 `ViewVC Repository Browser <http://llvm.org/viewvc/>`_
220 :doc:`CompilerWriterInfo`
221 A list of helpful links for compiler writers.
224 A library for writing in-process guided fuzzers.
226 :doc:`ScudoHardenedAllocator`
227 A library that implements a security-hardened `malloc()`.
229 Subsystem Documentation
230 =======================
232 For API clients and LLVM developers.
239 BlockFrequencyTerminology
263 CoverageMappingFormat
270 :doc:`WritingAnLLVMPass`
271 Information on how to write LLVM transformations and analyses.
273 :doc:`WritingAnLLVMBackend`
274 Information on how to write LLVM backends for machine targets.
277 The design and implementation of the LLVM code generator. Useful if you are
278 working on retargetting LLVM to a new architecture, designing a new codegen
279 pass, or enhancing existing components.
281 :doc:`Machine IR (MIR) Format Reference Manual <MIRLangRef>`
282 A reference manual for the MIR serialization format, which is used to test
283 LLVM's code generation passes.
285 :doc:`TableGen <TableGen/index>`
286 Describes the TableGen tool, which is used heavily by the LLVM code
290 Information on how to write a new alias analysis implementation or how to
291 use existing analyses.
293 :doc:`GarbageCollection`
294 The interfaces source-language compilers should use for compiling GC'd
297 :doc:`Source Level Debugging with LLVM <SourceLevelDebugging>`
298 This document describes the design and philosophy behind the LLVM
299 source-level debugger.
302 This document describes the current status of vectorization in LLVM.
304 :doc:`ExceptionHandling`
305 This document describes the design and implementation of exception handling
309 Automatic bug finder and test-case reducer description and usage
313 This describes the file format and encoding used for LLVM "bc" files.
315 :doc:`System Library <SystemLibrary>`
316 This document describes the LLVM System Library (``lib/System``) and
317 how to keep LLVM source code portable
319 :doc:`LinkTimeOptimization`
320 This document describes the interface between LLVM intermodular optimizer
321 and the linker and its design
324 How to build your programs with link-time optimization on Linux.
326 :doc:`DebuggingJITedCode`
327 How to debug JITed code with GDB.
329 :doc:`MCJITDesignAndImplementation`
330 Describes the inner workings of MCJIT execution engine.
332 :doc:`BranchWeightMetadata`
333 Provides information about Branch Prediction Information.
335 :doc:`BlockFrequencyTerminology`
336 Provides information about terminology used in the ``BlockFrequencyInfo``
339 :doc:`SegmentedStacks`
340 This document describes segmented stacks and how they are used in LLVM.
342 :doc:`MarkedUpDisassembly`
343 This document describes the optional rich disassembly output syntax.
345 :doc:`HowToUseAttributes`
346 Answers some questions about the new Attributes infrastructure.
349 This document describes using the NVPTX back-end to compile GPU kernels.
352 This document describes how to use the AMDGPU back-end.
355 LLVM support for mapping instruction addresses to the location of
356 values and allowing code to be patched.
359 LLVM's support for generating NEON instructions on big endian ARM targets is
360 somewhat nonintuitive. This document explains the implementation and rationale.
362 :doc:`CoverageMappingFormat`
363 This describes the format and encoding used for LLVM’s code coverage mapping.
366 This describes a set of experimental extensions for garbage
369 :doc:`MergeFunctions`
370 Describes functions merging optimization.
373 Description of the ``inalloca`` argument attribute.
376 LLVM support for folding control flow into faulting machine instructions.
378 :doc:`CompileCudaWithLLVM`
379 LLVM support for CUDA.
381 Development Process Documentation
382 =================================
384 Information about LLVM's development process.
397 :doc:`DeveloperPolicy`
398 The LLVM project's policy towards developers and their contributions.
401 How-to guide and templates for new projects that *use* the LLVM
402 infrastructure. The templates (directory organization, Makefiles, and test
403 tree) allow the project code to be located outside (or inside) the ``llvm/``
404 tree, while using LLVM header files and libraries.
407 Describes the LLVMBuild organization and files used by LLVM to specify
408 component descriptions.
410 :doc:`HowToReleaseLLVM`
411 This is a guide to preparing LLVM releases. Most developers can ignore it.
413 :doc:`ReleaseProcess`
414 This is a guide to validate a new release, during the release process. Most developers can ignore it.
417 Advice on packaging LLVM into a distribution.
420 Describes how to use the Phabricator code review tool hosted on
421 http://reviews.llvm.org/ and its command line interface, Arcanist.
426 LLVM has a thriving community of friendly and helpful developers.
427 The two primary communication mechanisms in the LLVM community are mailing
433 If you can't find what you need in these docs, try consulting the mailing
436 `Developer's List (llvm-dev)`__
437 This list is for people who want to be included in technical discussions of
438 LLVM. People post to this list when they have questions about writing code
439 for or using the LLVM tools. It is relatively low volume.
441 .. __: http://lists.llvm.org/mailman/listinfo/llvm-dev
443 `Commits Archive (llvm-commits)`__
444 This list contains all commit messages that are made when LLVM developers
445 commit code changes to the repository. It also serves as a forum for
446 patch review (i.e. send patches here). It is useful for those who want to
447 stay on the bleeding edge of LLVM development. This list is very high
450 .. __: http://lists.llvm.org/pipermail/llvm-commits/
452 `Bugs & Patches Archive (llvm-bugs)`__
453 This list gets emailed every time a bug is opened and closed. It is
454 higher volume than the LLVM-dev list.
456 .. __: http://lists.llvm.org/pipermail/llvm-bugs/
458 `Test Results Archive (llvm-testresults)`__
459 A message is automatically sent to this list by every active nightly tester
460 when it completes. As such, this list gets email several times each day,
461 making it a high volume list.
463 .. __: http://lists.llvm.org/pipermail/llvm-testresults/
465 `LLVM Announcements List (llvm-announce)`__
466 This is a low volume list that provides important announcements regarding
467 LLVM. It gets email about once a month.
469 .. __: http://lists.llvm.org/mailman/listinfo/llvm-announce
474 Users and developers of the LLVM project (including subprojects such as Clang)
475 can be found in #llvm on `irc.oftc.net <irc://irc.oftc.net/llvm>`_.
477 This channel has several bots.
481 * llvmbb - Bot for the main LLVM buildbot master.
482 http://lab.llvm.org:8011/console
483 * bb-chapuni - An individually run buildbot master. http://bb.pgr.jp/console
484 * smooshlab - Apple's internal buildbot master.
486 * robot - Bugzilla linker. %bug <number>
488 * clang-bot - A `geordi <http://www.eelis.net/geordi/>`_ instance running
489 near-trunk clang instead of gcc.
491 Community wide proposals
492 ------------------------
494 Proposals for massive changes in how the community behaves and how the work flow
501 Proposals/GitHubSubMod
504 Proposal to adopt a code of conduct on the LLVM social spaces (lists, events,
507 :doc:`Proposals/GitHubSubMod`
508 Proposal to move from SVN/Git to GitHub.