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the llvm compiler infrastructure project the llvm compiler infrastructure site map overview features documentation command guide faq publications llvm projects open projects llvm users bug tracker llvm logo blog meetings llvm foundation download download now llvm 18 1 3 all releases apt packages fedora snapshot packages pre releases view the open source license search this site useful links forums llvm discourse mailing lists commits list discord real time chat discord irc channel irc oftc net llvm calendar llvm community calendar dev resources doxygen sources github code review blog bug tracker buildbot green dragon lnt scan build llvm cov compile time tracker release emails 18 1 3 apr 2024 18 1 2 mar 2024 18 1 1 mar 2024 18 1 0 mar 2024 17 0 6 nov 2023 17 0 5 nov 2023 17 0 4 oct 2023 17 0 3 oct 2023 17 0 2 oct 2023 17 0 1 sep 2023 all announcements maintained by the llvm admin team llvm overview the llvm project is a collection of modular and reusable compiler and toolchain technologies despite its name llvm has little to do with traditional virtual machines the name llvm itself is not an acronym it is the full name of the project llvm began as a research project at the university of illinois with the goal of providing a modern ssa based compilation strategy capable of supporting both static and dynamic compilation of arbitrary programming languages since then llvm has grown to be an umbrella project consisting of a number of subprojects many of which are being used in production by a wide variety of commercial and open source projects as well as being widely used in academic research code in the llvm project is licensed under the apache 2 0 license with llvm exceptions the primary sub projects of llvm are the llvm core libraries provide a modern source and target independent optimizer along with code generation support for many popular cpus as well as some less common ones these libraries are built around a well specified code representation known as the llvm intermediate representation llvm ir the llvm core libraries are well documented and it is particularly easy to invent your own language or port an existing compiler to use llvm as an optimizer and code generator clang is an llvm native c c objective c compiler which aims to deliver amazingly fast compiles extremely useful error and warning messages and to provide a platform for building great source level tools the clang static analyzer and clang tidy are tools that automatically find bugs in your code and are great examples of the sort of tools that can be built using the clang frontend as a library to parse c c code the lldb project builds on libraries provided by llvm and clang to provide a great native debugger it uses the clang asts and expression parser llvm jit llvm disassembler etc so that it provides an experience that just works it is also blazing fast and much more memory efficient than gdb at loading symbols the libc and libc abi projects provide a standard conformant and high performance implementation of the c standard library including full support for c 11 and c 14 the compiler rt project provides highly tuned implementations of the low level code generator support routines like __fixunsdfdi and other calls generated when a target doesn t have a short sequence of native instructions to implement a core ir operation it also provides implementations of run time libraries for dynamic testing tools such as addresssanitizer threadsanitizer memorysanitizer and dataflowsanitizer the mlir subproject is a novel approach to building reusable and extensible compiler infrastructure mlir aims to address software fragmentation improve compilation for heterogeneous hardware significantly reduce the cost of building domain specific compilers and aid in connecting existing compilers together the openmp subproject provides an openmp runtime for use with the openmp implementation in clang the polly project implements a suite of cache locality optimizations as well as auto parallelism and vectorization using a polyhedral model the libclc project aims to implement the opencl standard library the klee project implements a symbolic virtual machine which uses a theorem prover to try to evaluate all dynamic paths through a program in an effort to find bugs and to prove properties of functions a major feature of klee is that it can produce a testcase in the event that it detects a bug the lld project is a new linker that is a drop in replacement for system linkers and runs much faster the bolt project is a post link optimizer it achieves the improvements by optimizing application s code layout based on execution profile gathered by sampling profiler in addition to official subprojects of llvm there are a broad variety of other projects that use components of llvm for various tasks through these external projects you can use llvm to compile ruby python haskell rust d php pure lua julia and a number of other languages a major strength of llvm is its versatility flexibility and reusability which is why it is being used for such a wide variety of different tasks everything from doing light weight jit compiles of embedded languages like lua to compiling fortran code for massive super computers as much as everything else llvm has a broad and friendly community of people who are interested in building great low level tools if you are interested in getting involved a good first place is to skim the llvm blog and join llvm discourse for information on how to send in a patch get commit access and copyright and license topics please see the llvm developer policy latest llvm release 3 apr 2024 llvm 18 1 3 is now available for download llvm is publicly available under an open source license also you might want to check out the new features in git that will appear in the next llvm release if you want them early download llvm through anonymous git upcoming events april 9 11 2024 eurollvm dev mtg acm software system award llvm has been awarded the 2012 acm software system award this award is given by acm to one software system worldwide every year llvm is in highly distinguished company click on any of the individual recipients names on that page for the detailed citation describing the award upcoming releases llvm release schedule 18 1 x jan 29th 18 1 0 rc1 was released feb 7th 18 1 0 rc2 was released feb 21st 18 1 0 rc3 was released feb 27th 18 1 0 rc4 was released mar 5th 18 1 0 was released mar 8th 18 1 1 was released mar 19th 18 1 2 was released apr 3rd 18 1 3 was released apr 16th 18 1 4 apr 30th 18 1 5 may 14th 18 1 6 if necessary developer meetings upcoming april 9 11 2024 proceedings from past meetings october 9 11 2023 may 10 11 2023 november 8 9 2022 may 10 11 2022 november 16 19 2021 october 6 8 2020 october 22 23 2019 april 8 9 2019 october 17 18 2018 april 16 17 2018 october 18 19 2017 march 27 28 2017 november 3 4 2016 march 17 18 2016 october 29 30 2015 april 13 14 2015 october 28 29 2014 april 7 8 2014 nov 6 7 2013 april 29 30 2013 november 7 8 2012 april 12 2012 november 18 2011 september 2011 november 2010 october 2009 august 2008 may 2007
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