Editing LLVM (section)

== Derivatives ==
Due to its permissive license, many vendors release their own tuned forks of LLVM. This is officially recognized by LLVM's documentation, which suggests against using version numbers in feature checks for this reason.<ref>{{cite web |title=Clang Language Extensions |url=https://clang.llvm.org/docs/LanguageExtensions.html#feature-checking-macros |website=Clang 12 documentation |quote=Note that marketing version numbers should not be used to check for language features, as different vendors use different numbering schemes. Instead, use the Feature Checking Macros.}}</ref> Some of the vendors include:
* AMD's [[AMD Optimizing C/C++ Compiler]] is based on LLVM, Clang, and Flang.
* Apple maintains an open-source fork for [[Xcode]].<ref>{{cite web |title=apple/llvm-project |url=https://github.com/apple/llvm-project |publisher=Apple |date=5 September 2020}}</ref>
* [[ARM architecture|Arm]] provides a number of LLVM based toolchains, including Arm Compiler for Embedded targeting bare-metal development and Arm Compiler for Linux targeting the High Performance Computing market
* [[Flang]], Fortran project in development {{As of|2022|lc=y}}
* [[IBM]] is adopting LLVM in its [[IBM XL C/C++ Compilers|C/C++]] and [[IBM XL Fortran|Fortran]] compilers.<ref>{{cite web |url=https://developer.ibm.com/blogs/c-and-fortran-adopt-llvm-open-source/ |title=IBM C/C++ and Fortran compilers to adopt LLVM open source infrastructure|date=July 29, 2022 }}</ref>
* [[Intel]] has adopted LLVM for their next generation [[Intel C++ Compiler]].<ref>{{Cite web |title=Intel C/C++ compilers complete adoption of LLVM |url=https://www.intel.com/content/www/us/en/develop/blogs/adoption-of-llvm-complete-icx.html |access-date=2021-08-17 |website=Intel |language=en}}</ref>
* The [[Los Alamos National Laboratory]] has a parallel-computing fork of LLVM 8 named "Kitsune".<ref>{{cite web |title=lanl/kitsune |url=https://github.com/lanl/kitsune |publisher=Los Alamos National Laboratory |date=27 February 2020}}</ref>
* [[Nvidia]] uses LLVM in the implementation of its NVVM [[CUDA]] Compiler.<ref>{{cite web|title=NVVM IR Specification 1.5|url=https://docs.nvidia.com/cuda/nvvm-ir-spec/index.html|quote=The current NVVM IR is based on LLVM 5.0}}</ref> The NVVM compiler is distinct from the "NVPTX" backend mentioned in the [[#Backends|Backends section]], although both generate PTX code for Nvidia GPUs.
* Since 2013, Sony has been using LLVM's primary front-end Clang compiler in the [[software development kit]] (SDK) of its [[PlayStation 4]] console.<ref>{{citation |url=http://llvm.org/devmtg/2013-11/slides/Robinson-PS4Toolchain.pdf |title=Developer Toolchain for ps4 |access-date=February 24, 2015}}</ref>