RISC-V LLVM State of the Union

on YouTube ↗17m

" summary

Status update on RISC-V LLVM: LLVM supports the mandatory RV64G/23 extensions, has growing contributor diversity, and runs a CI-backed test farm using QEMU builders to validate extensions before hardware. Slides report benchmark comparisons benchmarks vs GCC showing GCC often wins but LLVM vectorization and code-size improvements are closing gaps. Practical tooling includes experimental extensions flag for early upstreaming and CI and tracking metrics for regressions; function multiversioning and microarch scheduling are next priorities.

AI-written summary · about

" chapters (7)

1. 0:00Introduction to RISC-V LLVM
2. 1:41Development and ecosystem
3. 3:38Upstreaming and extensions
4. 6:45Testing and performance
5. 8:59Benchmarking results
6. 13:53Recent technical updates
7. 15:32Getting involved and future

" related talks

• 24mRISC V LLVM: Towards A Production-Ready LLVM-Based ToolchainAlex Bradbury · 7th RISC-V Workshop 2017
• 16mImprovements to RISC-V Vector code generation in LLVMAlex Bradbury, Luke Lau · RISC-V Summit Europe 2025
• 20mRISC V Software State of the UnionRandy Allen · RISC-V Summit 2019
• 28mLLVM for RISCVAlex Bradbury · 8th RISC-V Workshop Barcelona 2018
• 21mOpen Source Compiler Tool Chains for RISC V Past, Present and FutureJeremy Bennett · RISC-V Summit 2019
• 17mMaking LLVM RISC-V Compiler More Performant for EveryoneIvan Baev · RISC-V Summit North America 2023
• 21mProduction ready RISC V Support in LLVM Clang 9Alex Bradbury · RISC-V Summit 2019
• 19mThe RISC-V Software Ecosystem: Primed for the Latest ISA ExtensionsAndrew Jones · RISC-V Summit North America 2025