LLVM Weekly - #648, June 1st 2026

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LLVM Weekly - #648, June 1st 2026

If you prefer, you can read the canonical version of this issue at https://llvmweekly.org/issue/648.

Welcome to the six hundred and forty-eighth 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 https://llvmweekly.org and pass it on to anyone else you think may be interested. Please send any tips or feedback via email: asb@asbradbury.org, or Mastodon: @llvmweekly@fosstodon.org / @asb@fosstodon.org, or Bluesky: @llvmweekly.org / @asbradbury.org.

News and articles from around the web and events

The Call for Workshops for the 2026 LLVM Developers’ Meeting is out. Deadline June 3rd.

The next Compiler Social Zurich will take place on June 17th with a talk from Hendrik Klug from Synthara.

The next Cambridge (UK) Compiler Social will take place on Thursday 4th June at the Computer Laboratory and feature a talk from Lana Josipović, “From Software Programs to Digital Circuits”. Be sure to sign up if you can attend.

According to the LLVM Calendar in the coming week there will be the following:

  • Office hours with the following hosts: Quentin Colombet, Johannes Doerfert, Renato Golin.
  • Online sync-ups on the following topics: formal specification, MLIR C/C++ frontend, pointer authentication, MemorySSA, Clang static analysis, OpenMP, Clang C and C++ language working group, Flang, SPIR-V, RISC-V, LLVM libc, HLSL, LLVM qualification, MLGO, LLVM libc math.
  • For more details see the LLVM calendar, getting involved documentation on online sync ups and office hours.

On the forums

LLVM commits

  • Initial MC layer support was added for RISC-V RVY (CHERI). 098b05f.

  • LLVM’s DenseMap performance was improved, replacing tombstone deletion with a different algorithm. c4d820c.

  • musttail with indirect arguments was fixed on LoongArch. 19e915f.

  • Call frame information was implemented for AMDGPU non-kernel functions. f78a233.

  • llvm-debuginfo-analyzer gained the ability to take LLVM IR input. 6bbbf74. REVERTED

  • The DW_AT_LLVM_language_dialect DWARF attribute was added, with the intend of differentiating the source programming language from the programming model (e.g. CUDA/SIMT, Tile, etc). c09041a, 6c9542c.

  • MC layer support was added for the experimental RISC-V Zvdota (batched dot product). d25ec4b.

  • llvm-objdump and llvm-readobj can now dump Windows x64 Unwind v3 information. e1e52c9.

  • -fstack-clash-protection support was added for LoongArch. 5cac275.

  • Work started to factor out common parts of the SiFive RISC-V scheduling models, to reduce duplication. b76d08a.

  • The documentation on writing IR test cases was improved. f857294.

  • TableGen now has a !switch operator to conditionally use a value based on exact key match. 025b9a2.

Clang commits

  • -fno-debug-record-sysroot will exclude the absolute path to the sysroot from debug info, to aid reproducible builds. 85717da.

  • __builtin_clear_padding was introduced. 698d44b.

  • The ghlink Sphinx plugin used for Clang documentation was rewritten. 0ed795a.

  • You can use the experimental constant interpreter by default by setting the CLANG_USE_EXPERIMENTAL_CONST_INTERP CMake option. 08d281f.

  • clang-doc now supports a non-pretty JSON serialisation, resulting in smaller output vs the pretty-printed one. 92cfd0a.

Other project commits

  • DEC Alpha support was added to libsanitizer. 992ee59.

  • Minimal support for PGO was added for HIP offload. 5db1364.

  • LLD gained the necessary support for the cooperative multithreading defined in the WebAssembly Component Model. 577e9a7.

  • Initial infrastructure was added to LLDB for a plugin for debugging hardware accelerators like GPUs. 3d24f9a.