This repository houses versions of LLVM that support downgrading IR to previous versions. Specifically, LLVM 5.0 and LLVM 7.0, as required to target respectively Apple's Metal and NVIDIA's NVVM.
The actual code does not live on the main branch, but in branches versioned after the
LLVM version they contain: downgrade_release_13 to downgrade_release_17.
We currently only aim to support the LLVM versions that are used by the Julia programming language. In addition, these branches may contain additional patches as used by Julia.