LLVM

LLVM is a modular compiler and toolchain infrastructure, providing reusable, language-agnostic components for high-performance compilation and optimization.

LLVM is a collection of modular compiler and toolchain technologies, designed for maximum reusability and performance. Its core is the Intermediate Representation (IR), a portable, high-level assembly that acts as the optimization target between the frontend and backend stages. This three-part architecture allows projects like Clang (for C/C++) and compilers for Swift and Rust to share a single, powerful optimization and code generation engine. This flexibility enables efficient, cross-platform compilation for diverse architectures: from x86 and ARM to GPUs, making LLVM a foundational component in modern operating systems and development toolchains.

https://llvm.org