The LLVM Compiler Infrastructure Project

This page lists the people and organizations that have used or are currently using LLVM in research, education, industry, or open source development. It only includes users who have publicly discussed their use of LLVM in one form or another (mentioned it on llvm-dev, published work on it, etc.). We believe there are many other users not listed here and would welcome a brief note telling us about your use so that we can add you to the list.

This page has only brief entries. Some of these projects are described in more detail on the "Projects Using LLVM" page.

Company	Description
Adobe Systems Incorporated	Optimizer and JIT codegen for the Hydra Language.
Adobe Systems Incorporated	Alchemy C/C++ Compiler for the ActionScript Virtual Machine (AVM2). See the FAQ and Scott Petersen's DevMtg talk for more details.
Adobe Systems Incorporated	ActionScript 3 Ahead-of-Time (AOT) Compiler for iPhone software development. See Aditya Bansod's blog entry and this video for more details.
Ageia Technologies	Optimizer and back end for custom processor
Apple Inc.	Xcode 4.2: "LLVM Compiler 3.0" (aka Clang) now supports many C++'11 features and libc++ is supported as a modern C++ runtime library. ARC is a major new Objective-C feature introduced in this release, introducing automated memory management to iOS programming. Xcode 4.2 no longer includes GCC 4.2, only the LLVM backend is supported (in the Clang and llvm-gcc compilers). Mac OS X 10.7 Lion and iOS5: Virtually all of the code in these operating systems were built with Clang and llvm-gcc. Xcode 4.1: LLDB supports debugging iOS devices. Xcode 4.0: The Clang parser for C, C++, and Objective-C are now deeply integrated into the Xcode IDE for code completion, syntax highlighting, indexing, "Edit All In Scope", and other source code sensitive features. The Clang command line compiler (known as "LLVM Compiler" in Xcode) also now fully supports C++. This was the first Apple release of the LLDB Debugger. Xcode 3.2: Clang is now included as a production quality C and Objective-C compiler that is available for use in Xcode or from the command line. It supports X86-32/X86-64 and builds code 2-3x faster than GCC in "-O0 -g" mode. Many "developer tools" GUI apps were shipped built with Clang, including Xcode, Interface Builder, Automator, and several others. Xcode 3.2: The Xcode Static Analyzer is built on the Clang static analyzer, and allows Xcode users easy access to the Clang Static Analyzer as well as a first class user interface to dig through and visualize results. Mac OS X 10.6: The OpenCL GPGPU implementation is built on Clang and LLVM compiler technology. This requires parsing an extended dialect of C at runtime and JIT compiling it to run on the CPU, GPU, or both at the same time. In addition, several performance sensitive pieces of Mac OS X 10.6 were built with llvm-gcc such as OpenSSL and Hotspot. Finally, the compiler_rt library has replaced libgcc and is now a part of libsystem.dylib. Xcode 3.1: llvm-gcc 4.2 compiler is now available for use in Xcode or from the command line. It supports PPC32/X86-32/X86-64 and includes transparent LTO integration. Mac OS X 10.4: Uses the LLVM JIT for optimizing many parts of the OpenGL pipeline, including emulating vertex/pixel shaders when hardware support is missing, performing texture format conversion before uploading to the GPU, efficiently packing GPU buffers for vertex submission, and many others.
Arxan Technologies, Inc.	EnsureIT - Comprehensive software/code protection for Android, Apple iOS, and Linux. Covers against both static and dynamic analysis threats.
Ascenium	Compiler for reconfigurable processor
AutoESL Design Technologies, Inc.	Electronic System Level (ESL) to Silicon
C-to-Verilog	Compiler from C into the Verilog hardware description language. Automates circuit design.
Codeplay Software	C/C++/OpenCL compilers and debuggers for CPUs, GPUs, DSPs and custom processors.
MTC Group Ltd.	Morpher - compiler-driven obfuscation solution for C/C++/ObjC/ObjC++. Protection against reverse engineering, cracking and tampering.
Cray Inc.	Backend for the Cray x86 compiler, available on the Cray XT5 and later machines.
Electronic Arts	Experimental backend for custom language implementation
Intel	OpenCL
Hue AS	JIT compilation of shader programs
Kosada, Inc.	The compiler for Vuo, a modern visual programming language for multimedia artists.
Mobileye	Compiler for stack machine architecture
National Instruments	Compiler for LabView 2010
Nuanti Browser Labs	WebKit Meta 2.0 SDK includes a specialized LLVM/clang toolchain for web application and game development featuring transparent C++ DOM and JavaScript bridging. C++/CLI NG is a clang-based .NET compiler that embraces and extends the Microsoft / ECMA-372 language standard.
NVIDIA	OpenCL runtime compiler (Clang + LLVM)
Rapidmind	Compiler platform for their GPGPU, multicore CPU, and OpenCL runtime platforms.
REAL Software	Optimizer and code generator for RBScript and REAL Studio compiler.
Siemens Technology-to-Business Center	Compiler for embedded VLIW processor
Sony Interactive Entertainment	CPU compiler for the PlayStation®4 system.
Sun Microsystems Laboratories	Parfait: Bug checker of C code
XMOS Technology	Backend port for their architecture, also working on multicore codegen support.
Octasic Inc	Opus Studio next generation, IDE and compiler for asynchronous DSP Architecture (in development).

Open Source Projects

Project	Description
SMACK Software Verifier	Software verifier that converts LLVM IR to Boogie
Objective Modula-2 Project	Modula-2 compiler w/ObjC runtime support. Targets Objective-C and LLVM.
IcedTea Version of Sun's OpenJDK	Uses LLVM as JIT on architectures other than x86 and Sparc.
PyPy Project	Python interpreter written in Python. Targets LLVM and C.
Faust Signal Processing Language	Signal processing language, uses the LLVM JIT for runtime codegen.
iPhone tool chain	llvm-gcc Compiler for iPhone Dev Wiki toolchain.
IOQuake3	IOQuake3 Raytracing Patch, uses LLVM for runtime shader compilation.
llvm-py: Python Bindings for LLVM	Build compilers and VMs in Python, using the LLVM Backend.
LDC	LLVM-based D Compiler.
Unladen Swallow	A faster implementation of Python.
Mono	Mono has an option to use LLVM for JIT compilation.
Rubinius	Ruby Environment.
MacRuby	Ruby Implementation for Mac OS X.
Pure	Term rewriting algebraic/functional programming language.
Roadsend PHP	PHP implementation.
LLVM-Lua	JIT and static compilation support for the Lua VM.
Emscripten	An LLVM to JavaScript compiler.
Julia	High-level, high-performance dynamic programming language for technical computing.
SkyEye	Fast full system simulator.
Intel SPMD Compiler	C-based SPMD language for CPU vector units.