Low-Level Virtual Machine
Low-Level Virtual Machine (LLVM) is a compiler infrastructure designed for compile-time, link-time, run-time, and "idle-time" optimization of programs from arbitrary programming languages. It currently supports compilation of C, Objective-C, and C++ programs, using front-ends derived from GCC 4.0, GCC 4.2, and a custom new front-end, "clang". It supports x86, x86_64, ia64, PowerPC, and SPARC, with support for Alpha and ARM under development.
| Tags | Software Development Compilers Code Generators |
|---|---|
| Implementation | C++ C |
Recent releases
- 17 Mar 2009 16:58
Changes: This release includes a new XCore backend. The gcc-4.2-based front-end now includes support for the C, C++, Objective-C, Ada, and Fortran programming languages. LLVM now uses CMake for Windows builds and supports arbitrary precision integers in the code generator. The '.ll' parser was completely rewritten to provide better diagnostics, and no longer relies on bison. Several analysis and optimization passes have been improved for speed and aggressiveness, including register promotion, scalar replacement of unions, and memory dependence analysis. This release ships with a new version of the driver llvmc which also supports the Clang plugin.
- 20 Nov 2008 18:08
Changes: This release includes improved compilation speed, support for multiple return values in LLVM IR, and initial support for PIC16. llvmc2 (the generic compiler driver) gained plugin support. It is now easier to experiment with llvmc2 and build your own tools based on it. This release also includes an optional build system based on CMake. It still is in its early stages, but can be useful for Visual C++ users who cannot use the Visual Studio IDE. Other improvements in LLVM internals include a more efficient representation that leads to lower memory usage and better vector support.
- 13 Jun 2008 16:59
Changes: This release includes many bugfixes, vastly improved support for the X86-64 ABI, support for SSE 4.1 on X86 chips, support for functions that return multiple results in memory, a new 'llvmc' tool, support for atomic operations, improved gfortran support, and many new and improved optimizer and code generator passes. A new addition to the LLVM family is "vmkit". vmkit is an implementation of a Java Virtual Machine and a CLI Virtual Machine (".NET") that use the Just-In-Time compiler of LLVM, as well as many facilities provided by the LLVM framework.
- 30 Apr 2008 23:25
Changes: Numerous major enhancements and bugfixes.
- 05 Dec 2007 02:59
Changes: Two new beta C front-ends were added: a new version of llvm-gcc based on gcc-4.2, and LLVM's own native C and Objective-C front-end, code named "clang". This front-end has a number of great features, primarily aimed at source-level analysis and speeding up compile time. This release includes new optimization passes: memory dependence analysis and global value numbering, and code generator improvements for X86, PPC, and ARM. C++ zero-cost exception handling now works in llvm-gcc-4.0 and llvm-gcc-4.2 on Linux/x86-32.
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