Open Source Compiler Tool Chains for RISC V Past, Present and Future

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" summary

RISC‑V compiler work is usable but uneven: GCC is more mature (out‑of‑tree since 2011) while LLVM reached mainline recently and gained RV64 support in 2018–2019. Key gaps: musl/C library work, compiler‑rt build pain, and sparse Fortran/Flang support. Prototype RV32 bit‑manipulation lowers code size dramatically on some workloads — a 16% size win on AES/SHA‑256 — and iterative tuning with OpenTuner yields ~15% gains; sustained progress needs paid compiler engineering.

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" chapters (8)

1. 0:00Intro
2. 0:48Tool Chain Components (GNU)
3. 2:17Tool Chain Components (Clang/LLVM)
4. 4:32History
5. 5:49Future Developments
6. 10:32Today's Size Optimization Techniques
7. 13:08Today's Speed Optimization Techniques
8. 15:52Future Size Optimization Techniques

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