LLVM Weekly - #247, September 24th 2018

Welcome to the two hundred and forty-seventh 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 7.0.0 has been released. Thanks to all contributors, testers, packers, and reviewers!

The new LLVM Foundation Board of Directors has been announced. As highlighted in the blog post, thanks are due to David Kipping for acting as treasurer over the past 4 years.

Version 1.18 of the TTA-based Co-Design Environment (TCE) has been released. It is "a toolset for design and programming of customized co-processors (typically DSPs) based on the Transport Triggered Architecture (TTA)." The new release adds support for LLVM 7.0, amongst other changes.

On the mailing lists

LLVM commits

A new PassInstrumentation framework has been committed. This provides common infrastructure to implement pass execution debugging features such as print-before, print-after, opt-bisec, time-passes etc. r342664.

The AArch64 assembly parser can now handle more complex expressions as valid relocatable operands. r342455.

The speed of TableGen's -den-dag-isel generator has been further improved. Extra caching of matching predicates saves ~25 secons of a debug build of X86 -gen-dag-isel . r342467.

The RISC-V backend gained codegen support for i8/i16/i32 atomicrmw using the 'A' (atomics) instruction set extension. This makes use of the atomics lowering strategy proposed in an llvm-dev RFC. r342534.

Dependency breaking instructions can now be described in TableGen using the STIPredicate TableGen class. r342555.

Clang commits

Clang's DeclarationName data structure saw various optimisations and refacgorings. This cuts the runtime of parsing Boost by ~0.8%. r342729.

Clang's code completion gained support for filenames in include directives. r342449.

Other project commits