OCaml 优化编译器 Flambda2 的幕后：介绍与路线图

Date: 2024-03-18
OCamlPro's ongoing task: Improving high-level optimisation on the OCaml Compiler. They are the authors behind the Flambda optimisation pass and introduce Flambda2.
About Flambda2: A new optimising backend for the OCaml native compiler. This series of blog posts will cover everything about it, providing context and history about Flambda2, its predecessor Flambda, and the OCaml compiler.
Compiling OCaml: Done through multiple passes. Before Flambda, the Closure pass transformed Lambda IR to Clambda IR and handled some optimisations. Then, the Cmmgen pass transformed Clambda IR to CMM IR and handled more optimisations. Flambda was introduced with OCaml 4.03 and improved inlining and related optimisations. Flambda2 is meant to replace Flambda and Closure, translating directly to CMM and allowing for more optimisations.
Snippets Roadmap: This is the zeroth snippet, providing history and context. The rest will alternate between technical deep dives and user-facing descriptions of new optimisations.
The F2S Series:
- Episode 1: Covers the characteristics and benefits of a CPS-based internal representation for OCaml optimisation.
- Episode 2: Introduces Loopify, the first optimisation algorithm, and explains how it transforms tail-recursive functions.
- Episode 3: Introduces Speculative Inlining and how it computes and inlines optimised function code.
- Episode 4: Explores how Flambda2 processes and optimises code through structured traversals.
- Episode 5: Coming soon.
About OCamlPro: A R&D lab founded in 2011, providing various services such as audit, support, custom tools, and training. They create open-source projects and are experts in Formal Methods. Reach out at contact@ocamlpro.com or book a quick discussion.