LLVM Weekly - #492, June 5th 2023

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LLVM Weekly - #492, June 5th 2023

If you prefer, you can read a HTML version of this email at http://llvmweekly.org/issue/492.

Welcome to the four hundred and ninety-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.

News and articles from around the web and events

The next LLVM Bay Area Monthly Meetup will be held today (Mon June 5th).

LLVM 16.0.5 was released.

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

  • Office hours with the following hosts: Paulo Matos, Tobias Grosser, Anastasia Stulova, Johannes Doerfert, Quentim Colombet.
  • Online sync-ups on the following topics: MemorySSA, OpenMP, Clang C/C++ language working group, RISC-V, MLIR, SPIR-V.
  • For more details see the LLVM calendar, getting involved documentation on online sync ups and office hours.

On the forums

LLVM commits

  • A scheduling model was committed for the Intel Sapphire Rapids microarchitecture. 8db674a.

  • InstructionSimplify APIs now requires instructions to be inserted into a parent function. 1536e29.

  • Thread local storage support was added to the M68k backend. 4c2ec08.

  • A skeleton implementation of DWARFLinkerParallel was committed. 36f3510.

  • GlobalISel’s lowerFormalArguments and lowerCall were implemented in the RISC-V backend. af8e386, 9c6bee6.

  • llvm::Optional was removed as the migration to std::optional has completed. 397f2e9.

  • !getdagarg and !getdagname were introduced to the TableGen language. 26d7b7b.

  • Support for the lga pseudoinstruction was added to the RISC-V backend MC layer. 9b55e5d.

  • The ComplexDeinterLeavingPass was extended to better handle -Ofast code. 1a1e761.

  • llvm/include/llvm/Demangle/StringView.h was removed as libcxxabi and Demangle have been migrated to std::string_view. 217709c.

Clang commits

  • An extension hook was added for defining keyword attributes, which might be used for platform-specific language extensions as an alternative to GNU-style attributes. The commit message goes into much more detail, but one advantage is that compilers that don’t support these keywords will reject the input with an error rather than warning (as they would for an unrecognised GNU-style attribute). 301eb6b, 33ee5c4.

  • The misc-include-cleaner check was implemented in clang-tidy, checking for unused and missing includes. c28506b.

  • The AArch64 SME load/store intrinsics were added. 9f6250f.

  • Clang’s diagnostics for when it fails to deduce the auto return type of a function were improved. 0442d08.

Other project commits

  • The initial chapters of a tutorial on the MLIR transform dialect were introduced. 68ae0d7.

  • CUDA Fortran support started to be upstreamed to Flang. 4ad7279, 27f7180, 3332dc3, f513bd8, f674ddc.

  • Support for linking bitcode was removed from the LLD MachO linker. 48e5f70.

3 Likes
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The Intel Sappphire Rapids link seems to be almost correct, but it is not.

1 Like
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@tschuett thanks, fixed.

1 Like