LLVM Weekly - #463, November 14th 2022

Welcome to the four hundred and sixty-third 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, or @llvmweekly or @asbradbury on Twitter.

News and articles from around the web

The call for proposals for the FOSDEM 2023 LLVM dev room is now out.

Herb Sutter wrote a trip report from the Autumn ISO C++ standard meeting.

As has been covered extensively on HN, Reddit, Phoronix, and others, Rui Ueyama is seeking a sustainable funding model for the mold linker and as part of that is weighing up a license change from AGPL to source-available. Mold of course isn’t part of the LLVM project, though Rui has been laser-focused on linker performanced since his work on lld.

On the forums

• A number of round table summaries or reports from conversations at the LLVM dev meeting were shared. e.g. a summary of the office hours round table, a summary of the security group round table, a summry of the profiling + coverage + compiler-rt round table, and a summary of discussions about floating-point accuracy control.

• Tom Lin shared a new project ‘Race To Binary’ to track LLVM and GCC compile times.

• Pierre van Houtryve posted a proposal for adding a generic ValueType to TableGen representing any valuetypes of a given size, e.g. vtAny32.

• Michael Platings proposed adding a buildbot builder to test LLVM and picolibc together.

LLVM commits

• SVE 2.1 BF16 instructions were added to the AArch64 backend. cf69895.

• The BranchRelaxation pass is now supported for LoongArch. 57ad3f1.

• Instructions were added for stand-alone builds of Clang. 1cb97a1.

Clang commits

• -Wincompatible-function-pointer-types-strict was added. 41ce74e.

• Clang behaviour for reserved module names was documented. 04fb3e3.

Other project commits

• A SymbolStringPool class was added to the ORC runtime. 8fda890.

• Flang gained an -fpass-plugin option. c3821b8.

• LLVM’s libc gained implementations of getc, getc_unlocked, fgetc_unlocked, and gettimeofday. 43e52ad, 6a61019, 78f172e.

• The libcxx pre-commit CI was documented. 0c111dd.

• googletest was moved to the third-party directory. 5905246.