LLVM Weekly - #160, Jan 23rd 2017

Welcome to the one hundred and sixtieth 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.

News and articles from around the web

LLVM 4.0.0-rc1 has now been tagged.

Details are now available for EuroLLVM2017 student travel grants.

The Polly project has gained a new ARM64 buildbot, sponsored by the Qualcomm Innovation Center. This blog post goes into some extra detail about Polly's continuous integration setup.

The next Cambridge LLVM social will take place on Wednesday, Jan 25th.

The next Berlin LLVM social will take place on the 26th of January.

On the mailing lists

LLVM commits

A new -debug-info-for-profiling option was added. This will cause a larger amount of debug info to be generated which will be used in profile-guided optimisations. r292457.

Partial unrolling now has its own threshold. r292293.

Literals generated AArch64 targets are now constructed started from their little end, in order to meet the recommendation of the Cortex A57 software optimisation guide. r292422.

The LiveRegUnits class has been factored out of RegisterScavenging. r292542.

Support for profile-guided optimisation in the new inliner has been improved. r292666.

LoopSink has been ported to the new pass manager. r292589.

Clang commits

Support for constexpr evaluation of string builtins was documented. r292558.

Sadly, Clang's Python bindings don't currently work in Python 3. They will now explicitly check the Python version an raise an error if it's not '2'. r292247.

Support for OpenMP 'target parallel' on the host and the NVPTX device was added. r292419, r292428.

Other project commits