LLVM Weekly - #158, Jan 9th 2017

Welcome to the one hundred and fifty-eighth 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

John Regehr has written up a really helpful tourist's guide to the LLVM source code.

The Alive tool for proving the correctness of peephole optimisations is now available online.

The program for the LLVM performance workshop at CGO has been announced. It will take place on Saturday February 4th in Austin, Texas.

The next LLVM social in Paris has been announced for January 17th. It will feature a talk on the interactions between Polly and other LLVM passes.

Shahar Mike has written up a brief tutorial on using libclang to parse C++.

On the mailing lists

LLVM commits

MetadataLoader will now load metadata lazily. This reduces the link time of the 'opt' binary with ThinLTO and debug info enabled from 282s to 224s. r291027.

The packing of the DwarfDebugLine::Row struct has been optimized from 32-bytes to 24-bytes on 64-bit. r290931.

The PriorityWorklist in LLVM's ADT library gained support for bulk insertion. r290952.

The in-tree copy of googletest has been updated to 1.8.0. r291029.

TargetTransformInfo's getAddressComputationCost can now take a scalar evolution object. This allows TTI to determine whether a given strided access is complex or not. r291106.

A new WebAssembly pass has been added which replaces bitcasted function addresses with wrappers to replace the bitcasts. r291315.

Clang commits

Support for the AVR target was added to Clang. r291082.

The -Wtautological-overlap-compare warning will now fire in more cases. r290920.

Other project commits