LLVM Weekly - #310, December 9th 2019

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. 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, or @llvmweekly or @asbradbury on Twitter.

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News and articles from around the web

LLVM 9.0.1-rc2 has been tagged.

On the mailing lists

LLVM commits

The ARMCodeGenPrepare pass has graduated from the Arm backend to a generic TypePromotion pass. bc76dad.

LLVM's documentation on contributing was expanded to discuss git-clang-format . 06911ae.

The LangRef was updated to clarify the behaviour of poison within vector elements. ead0d77.

The MachineVerifier will now check that the operand type matches that of the descriptor. 4fd8f11.

GlobalISel now allows targets to override how to widen constants during legalisation. 6da7dbb.

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.

Clang commits

Concepts implementation work continues with the addition of enforcement for associated constraints and elaborated diagnostics on why constraints weren't satisfied. fdf80e8.

The new SpacesInConditionalStatement option for clang-format will insert spaces inside the braces for if/for/while conditions. e.g. if ( a ) . 26748a3.

Clang learned a Wmisleading-indentation warning. bc840b2.

clang-tidy modernize-avoid-bind check was rewritten, adding significant new functionality. 64f74bf.

Other project commits