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LLVM Weekly - #79, Jul 6th 2015

Welcome to the seventy-ninth 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.

Last week I was in Berkeley for the second RISC-V conference. If you weren't able to make it, worry not because I liveblogged both day one and day two.

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News and articles from around the web

Stephen Cross has released llvm-abi, a library for generating LLVM IR that complies with platform ABIs.

This is a rather cute implementation of Tetris in C++ header files, compatible with Clang.

On the mailing lists

LLVM commits

  • The initial skeleton of the WebAssembly backend has been committed. It is not yet functional. r241022.

  • DIModule metadata nodes have been introduced. A DIModule is meant to be used to record modules importaed by the current compile unit. r241017.

  • New exception handling intrinsics have been added for recovering and restoring parent frames. r241125.

Clang commits

  • Clang gained support for the x86 builtin __builtin_cpu_supports. r240994.

  • The Clang man pages have been converted to Sphinx (from .pod). r241037.

Other project commits

  • libcxx gained shared_mutux. r241067.

  • LLD has gained some generally applicable optimisations. e.g. devirtualizing SymbolBody and compacting its in-memory representation. r241001.

  • LLD's COFF linker can now link a working 64-bit debug build of Chrome. chrome.dll takes 24 seconds (vs 48 seconds for linking it with MSVC). r241318.

  • LLDB grew an example of scripted steps in Python. r241216.