LLVM Weekly - #522, January 1st 2024

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LLVM Weekly - #522, January 1st 2024

If you prefer, you can read the canonical version of this issue at http://llvmweekly.org/issue/522.

Welcome to the five hundred and twenty-second issue of LLVM Weekly, a weekly newsletter (published every Monday) covering developments in LLVM, Clang, and related projects. LLVM Weekly is brought to you by Alex Bradbury. Subscribe to future issues at http://llvmweekly.org and pass it on to anyone else you think may be interested. Please send any tips or feedback to asb@asbradbury.org, @llvmweekly or @asbradbury on Twitter, or @llvmweekly@fosstodon.org or @asb@fosstodon.org.

Ten years of LLVM Weekly!

Today marks a massive milestone, LLVM Weekly has now been published every single week (without failure) for the past ten years. Thank you for reading! I’ve written up some thoughts and reflections on the newsletter, and also tried to answer some common questions about how it’s put together.

It has of course been a quiet week in terms of commits and development discussions due to many contributors being on holiday, so the issue is a bit more brief than usual.

News and articles from around the web and events

Yet another batch of videos from the 2023 LLVM Developers’ Meeting were posted on YouTube.

Serge Guelton wrote up some in-depth experimental with -ftrivial-auto-var-init.

If you’ve ever wanted the ability to convert simple functions defined in LLVM IR to an Excel spreadsheet performing the same computation, then Jordan Rose has you covered with CellLVM.

At the time of writing, reviews.llvm.org is down. However, Fangrui Song has blogged about work to move it to a static archive.

According to the LLVM calendar in the coming week there will be:

  • Office hours with the following hosts: Anastasia Stulova, Quentin Colombet, Johannes Doerfert.
  • Online sync-ups on the following topics: OpenMP, Flang, RISC-V, SPIR-V.
  • For more details see the LLVM calendar, getting involved documentation on online sync ups and office hours.

On the forums

LLVM commits

  • Codegen of overflow arithmetic intrinsics for M68k was improved. b80e1ac, 2476e2a.

  • In the X86 backend, MC layer support for APX (providing additional GPRs) variants of arithmetic instructions were added. d79ccee.

  • MC layer support was added for the experimental RISC-V Zimop (‘may-be-operations’) and Zcmop extensions. 1d76692, 13cdee9.

  • MC layer support was introduced for the RISC-V Zicfiss (shadow stack) extension. 3dc0638.

  • The noundef attribute can now be deduced for return values. 1228bec.

Clang commits

  • The Clang static analyzer release notes were prepared for the LLVM 18 release. d488adb.

  • The StdVariantChecker was documented. 1d2fab7.

Other project commits

  • FreeBSD 12.x is now the oldest supported release for compiler-rt. 450be89.

  • A flang pass was introduced to add the frame pointer attribute to functions. 04873773.

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Congrats on 10 years of writing this newsletter. Your efforts are very much appreciated!

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10 years without skipping a single edition is just amazing! Thanks for all the efforts, it’s very much appreciated. And the blog post is a nice read too.

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Congratulations! I am a big fan and an avid reader.

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