Minutes_2023_02_07

Numba Meeting: 2023-02-07

Attendees: Andre Masella, Siu Kwan Lam, Luk, Ianna Osborne, brandon willard, Todd Anderson. FPOC (last week): Kaustubh FPOC (incoming): Andre

NOTE: All communication is subject to the Numba Code of Conduct.

Please refer to this calendar for the next meeting date.

0. Discussion

• Development focus for the next 6 months (Siu / Stu)
  • Shared document posted on Discourse
    • https://numba.discourse.group/t/proposal-development-focus-for-2023h1/1773
• Compiler-rt (Siu)
  • Distribution options:
    • Should we make a new package for it?
    • Or include it in llvmlite and tie it to our discussion?
  • Questions:
    • Can different compiler-rt packages be coinstalled?
      • Statically linked and shared libraries, version depends on LLVM version, so it seems that they can be coinstalled but the compiler-rt archive has no version number to disambiguate (as in shared lib)
    • Do we need all of it?
      • No, just the builtins?
    • So can we include the builtins only with llvmlite?
      • Yes, but including static archives is hard
      • See e.g. various issues NumPy has had with doing this
    • What are the problems with shipping static archives?
      • Lowest-common-denominator instruction set
      • Looked into clang, set of .o files with postfix architecture name
    • Note that llvmlite sometimes used like a cross-compiler
      • Not an issue here because we only want compiler-rt for JIT use cases
    • If we don't allow cross-compilation and linking then we only need include native compiler-rt archives for the target in a package, which simplifies the situation somewhat.
  • Support for archives (llvmlite PR #902) can be considered separate from supporting compiler-rt.
  • Further work to support compiler-rt requires that we've resolved distribution issues.
  • How big is the compiler-rt package? I.e. how much would it increase the size of a package that includes it?
  • Note that it includes all sanitizers etc.
  • Thread on splitting out builtins: https://discourse.llvm.org/t/proposal-split-built-ins-from-the-rest-of-compiler-rt/67978/13

New "Ready for Review" PRs

• https://github.com/numba/llvmlite/pull/871 - Already in the 0.40 milestone and is RFR, but has no reviewer.

1. New Issues

• numba#8737 - Numba data model for void returns pointer to i8
• numba#8738 - LLVM14 linux-aarch64 blocker
• numba#8739 - Arrays Reported As Non-Contiguous, Causing Warning
• numba#8740 - cooperative groups: not syncing across (2D) grid?
• numba#8742 - Inconsistent output for floor_divide / remainder / divmod
• numba#8743 - Inconsistent error state with numpy for zero division

Closed Issues

2. New PRs

• numba#8735 - Update bot to close PRs waiting on authors for more than 3 months
• numba#8736 - Implement np.lib.stride_tricks.sliding_window_view
• numba#8741 - [WIP] Added initial typed set implementation
• llvmlite#902 - Add support for importing symbols from static library
• llvmlite#904 - Create GitHub Action for llvmlite release

Closed PRs

• merged - llvmlite#903 - Fix flake8 config and style for flake8 6

3. Next Release: Version 0.57.0/0.40.0, RC Jan 2023