LLVM Weekly - #305, November 4th 2019

Welcome to the three hundred and fifth 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 https://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

Bartlomiej Filipek picked out some of his favourite papers from the Belfast ISO C++ meeting.

On the mailing lists

• Chris Bieneman shared an RFC on updating the minimum CMake requirement to CMake 3.15.0. It generated a debate about the cost/benefit of such a move, and potential hassle for users having to update CMake to build LLVM.

• Jeroen Dobbelaere posted an update on the status of full restrict support.

• Siva Chandra shared a summary of roundtable discussions about libc from the LLVM Dev Meeting.

• Discussion on switching from Bugzilla to GitHub issues continues, with responses such as the one from Kristof Beyls giving more opinions on the potential benefits/costs of switching.

• Florian Hahn posted an updated RFC on matrix math support.

• Galina Kistanova reports that Zorg migration to the GitHub monorepo is now complete.

LLVM commits

• RemarkLinker was introduced to support deduplicating, filtering, and merging remarks across multiple translation units. e72e59e.

• The GlobalISel pipeline overview documentation has been rewritten. 1765f31.

• Windows Control Flow Guard checks can now be generated. d157a9b.

• Unordered atomic loads and stores are now lowered to LoadSDNode/StoreSDNode by default. 2460989.

• AArch64 can now used return address signing for outlined functions. 70caa1f.

• The deprecated BasicBlockPass and BasicBlockPassManager were deleted. 9f0ff0b.

Clang commits

• An initial flang driver mode was added, causing flang to be invoked for Fortran inputs rather than GCC. 6bf5580.

• Clang gained a no_builtin attribute. bd87916.

• clang-tidy gained a new check for types that can be made trivially-destructible by removing out-of-line defaulted destructor declarations. d36a033.

Other project commits

• Dexter, the Debug Experience Tester has been imported into debuginfo-tests. f78c236.

• A new profiler mode was added to continuously sync profile counter updates to a file. d889d1e.

• The copy of the GCC C Torture suite imported into the LLVM test suite is now enabled for SystemZ. 6448db5.