LLVM Weekly - #460, October 24th 2022

Welcome to the four hundred and sixtieth 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

LLVM 15.0.3 was released.

Registration is now sold out for the 2022 US LLVM Developers' Meeting and associated events.

On the forums

• Aaron Ballman summarised a recent conference call about the C++ buffer hardening proposal.

• Thorsten Schütt proposed bumping the minimal build requirements for LLVM from Apple Clang 9.3 to Apple Clang 10.0 due to improved C++17 support.

• Orlando Cazalet-Hyams shared an update on work on assignment tracking.

• Tobias Hieta posted a list of unresolved issues from the LLVM 15.x release as well as a 15.0.4 schedule update.

• Florian Hahn is interested in collaboration on reviving TypeSanitizer.

• Andy Kaylor shared a detailed RFC on floating-point accuracy control.

• ChuanqiXu is seeking to unify terminology about modules in Clang.

LLVM commits

• The RISC-V backend gained support for the short forward branch optimisation benefiting the SiFive 7-series. 2b32e4f.

• The ‘driver’, extensive documentation, and additional ‘logical elements’ of the implementation of the llvm-debuginfo-analyzer tool was added. c28a977, e28b935, 3c397c9, 0332a8e, de1e911.

• The LocalStackSlotAllocation pass was enabled for RISC-V. 82c820b.

• IR and bitcode support was implemented for the memory attribute. e9754f0.

Clang commits

• Intrinsics were exposed for X86 PREFETCHI and AMX-FP16 instructions. 62ca791, 661881d.

• An include-cleaner tool was added to clang-tools-extra. 6fa0e02.

• Clang now supports __has_constexpr_builtin. 5b56763.

Other project commits

• Documentation was committed about aliasing analysis in FIR. 19f4153.

• LLVM’s libc gained implementations of putc, fputc, putchar, sigaltstack, select, and fgetc 40b4943, 6795736, be4e425, 0480b45.

• Function call dumping was added to LLDB. 566146c, 840d861, f1e6385.

• The initial definition of the MLIR ‘index’ dialect was added. ddf87d6, cae746d.