Alex Bradbury via llvm-dev
2019-Dec-09 17:55 UTC
[llvm-dev] LLVM Weekly - #310, December 9th 2019
LLVM Weekly - #310, December 9th 2019 ==================================== If you prefer, you can read a HTML version of this email at <http://llvmweekly.org/issue/310>. Welcome to the three hundred and tenth 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](https://www.linkedin.com/in/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 at asbradbury.org>, or @llvmweekly or @asbradbury on Twitter. If you're at the RISC-V Summit this week, be sure to [drop by the lowRISC booth](https://www.lowrisc.org/blog/2019/12/lowrisc-101-introduction-to-lowrisc-at-the-risc-v-summit/) and say hello. ## News and articles from around the web LLVM 9.0.1-rc2 [has been tagged](http://lists.llvm.org/pipermail/llvm-dev/2019-December/137469.html). ## On the mailing lists * Hans Wennborg has shared the [proposed 10.0.0 release schedule](http://lists.llvm.org/pipermail/llvm-dev/2019-December/137445.html). This would see a branch taking place on 15th January with the target date for the final being 25th Feb 2020. * Kristof Beyls is [seeking program comittee volunteers](http://lists.llvm.org/pipermail/llvm-dev/2019-December/137334.html) for EuroLLVM 2020. * Gábor Horváth wrote an RFC [proposing function annotations](http://lists.llvm.org/pipermail/cfe-dev/2019-December/064067.html) as a next step in the effort to implement Herb Sutter's lifetime analysis. The proposed annotations would give information about the lifetime of function return values or output arguments. * Michael Woerister fed back that as far as he's aware, [profile-guided optimisation now works exactly as expected with Rust](http://lists.llvm.org/pipermail/llvm-dev/2019-December/137331.html). * Sander De Smalen is [working to set up SVE/SVE2 LLVM sync-up calls](http://lists.llvm.org/pipermail/llvm-dev/2019-December/137401.html). The first [will take place](http://lists.llvm.org/pipermail/llvm-dev/2019-December/137458.html) on Thursday 12th Dec at 4pm GMT. * Dmitri Gribenko [reports](http://lists.llvm.org/pipermail/llvm-dev/2019-December/137388.html) that he's set up a new buildbot with the new pass manager enabled. * Brian Gesiak kicked off an RFC discussion on [potentially extending Clang to help identify wasteful template function bodies](http://lists.llvm.org/pipermail/llvm-dev/2019-December/137345.html). This work would be motivated by a desire to help programmers identify ways to reduce compilation time. ## LLVM commits * The ARMCodeGenPrepare pass has graduated from the Arm backend to a generic TypePromotion pass. [bc76dad](https://reviews.llvm.org/rGbc76dadb3cf). * LLVM's documentation on contributing was expanded to discuss `git-clang-format`. [06911ae](https://reviews.llvm.org/rG06911aee7f8). * The LangRef was updated to clarify the behaviour of poison within vector elements. [ead0d77](https://reviews.llvm.org/rGead0d77409b). * The MachineVerifier will now check that the operand type matches that of the descriptor. [4fd8f11](https://reviews.llvm.org/rG4fd8f11901b). * GlobalISel now allows targets to override how to widen constants during legalisation. [6da7dbb](https://reviews.llvm.org/rG6da7dbb806d). * The register coalescer was updated so that if it rematerialises a register, it only sets a subregsiter rather than the super-register, if possible. [2ec71ea](https://reviews.llvm.org/rG2ec71ea7c74). ## Clang commits * Concepts implementation work continues with the addition of enforcement for associated constraints and elaborated diagnostics on why constraints weren't satisfied. [fdf80e8](https://reviews.llvm.org/rGfdf80e86a52). * The new SpacesInConditionalStatement option for clang-format will insert spaces inside the braces for if/for/while conditions. e.g. `if ( a )`. [26748a3](https://reviews.llvm.org/rG26748a321e2). * Clang learned a `Wmisleading-indentation` warning. [bc840b2](https://reviews.llvm.org/rGbc840b21e16). * clang-tidy modernize-avoid-bind check was rewritten, adding significant new functionality. [64f74bf](https://reviews.llvm.org/rG64f74bf72eb). ## Other project commits * LLDB's reproducer support will now check that the version of the running LLDB matches the one in the reproducer. [6282773](https://reviews.llvm.org/rG62827737acd). * LLVM's OpenMP library can now build a minimal device runtime library for amdgcn. [3ada8d2](https://reviews.llvm.org/rG3ada8d2a87a).