An LLVM backend for the Atmel AVR microprocessor architecture.
Currently AVR-LLVM can generate assembly files. Machine code generation and ELF support is almost complete, barring a few instruction encoding errors that are being rectified.
Subtarget features are not implemented (yet), and so generated code will be incompatible to most AVR models except the higher end ones (which support the entire AVR instruction set). Currently, all possible instructions are used, forbidding use of AVR-LLVM in chips that don't support everything. Specific CPU support is goal number 2, with machine code generation being placed first.
As the project is still very much in development, it is likely that you will encounter bugs. If you think you've found one, submit an issue - we're aiming for AVR-LLVM to eventually be a production-quality compiler backend, so bugs will not be tolerated.
See AVR_SUPPORT.md for a list of supported instructions.
Take a look at the issues page for goals and bugs that currently exist. Pull requests are very welcome!
The original project started several years ago and then it was abandoned. It is hosted on SourceForge.net.
A fork was created which updated the project to a more recent version of LLVM, which is located on GitHub.
This repository is a fork of the updated version.
The AVR-LLVM project aims to keep to code updated (so that it's always compatible with LLVM master), and also to improve the backend.