Alex Bradbury via llvm-dev
2019-Aug-05 11:37 UTC
[llvm-dev] LLVM Weekly - #292, August 5th 2019
LLVM Weekly - #292, August 5th 2019 ================================== If you prefer, you can read a HTML version of this email at <http://llvmweekly.org/issue/292>. Welcome to the two 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](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. ## News and articles from around the web LLVM 9.0.0-rc1 [has been tagged](http://lists.llvm.org/pipermail/llvm-dev/2019-July/134215.html). You can find out more about the LLVM project's move to GitHub [on the LLVM blog](http://blog.llvm.org/2019/08/the-llvm-project-is-moving-to-github.html). ## On the mailing lists * Leonard Chen [proposes](http://lists.llvm.org/pipermail/llvm-dev/2019-August/134326.html) switching to the new pass manager by default, now that 9.0 has branched. * David Greene wrote an RFC on [strong typedef utilities for LLVM](http://lists.llvm.org/pipermail/llvm-dev/2019-August/134302.html), which describes utility classes intended to increase type safety within the LLVM codebase. * A major blocker to transitioning the LLVM codebase to C++14 [has now been cleared](http://lists.llvm.org/pipermail/llvm-dev/2019-August/134358.html). Now that Google have migrated to libc++, the migration plan can [move forwards](http://lists.llvm.org/pipermail/llvm-dev/2019-August/134360.html). * Alex L shared an RFC on [improving Clang's FileManager](http://lists.llvm.org/pipermail/cfe-dev/2019-July/063022.html), which right now model file entries with multiple names correctly. * Michael Kruse [queries](http://lists.llvm.org/pipermail/llvm-dev/2019-August/134317.html) whether LLVM can optimise based on the assumption that stack overflow is undefined behaviour, and how this might interact with the noreturn/nounwind/willreturn function attributes. * Rui Ueyama [proposes](http://lists.llvm.org/pipermail/llvm-dev/2019-July/134263.html) adding an LLD feature to generate a build dependency file, similar to the `-MD` flag for Clang and GCC. * Bardia Mahjour [shares minutes](http://lists.llvm.org/pipermail/llvm-dev/2019-July/134280.html) from the loop optimisation working group. ## LLVM commits * An LLVM bitstream-based remark serializer was introduced. This has two serialisation modes: separate and standalone. [r367364](https://reviews.llvm.org/rL367364). * Unnamed function arguments are now printed with their automatically generated name (e.g. "i32 %0") in definitions. [r367755](https://reviews.llvm.org/rL367755). * A new Alignment type was introduced to the LLVM codebase. [r367393](https://reviews.llvm.org/rL367393). * APInt gained a new clearLowBits() method. [r367287](https://reviews.llvm.org/rL367287). * The git-llvm helper will now ask for confirmation if it would push multiple commits. [r367321](https://reviews.llvm.org/rL367321). * The AArch64 backend gained support for "tagged globals", where global variable addresses may include a pointer tag in bits 53-63. [r367475](https://reviews.llvm.org/rL367475). * The `raw_ostream` interface was improved to allow you to "write" colours using `operator<<`. [r367649](https://reviews.llvm.org/rL367649). ## Clang commits * A new `-Wimplicit-float-conversion` warning was introduced. [r367497](https://reviews.llvm.org/rL367497). * clang-tidy gained a new google-upgrade-googletest-case checker which updates uses of a deprecated API. [r367263](https://reviews.llvm.org/rL367263). ## Other project commits * libcxx gained allocator benchmarks. [r367722](https://reviews.llvm.org/rL367722). * The documentation on building LLDB was updated with better coverage of the monorepo and CMake caches. [r367302](https://reviews.llvm.org/rL367302).