LLVM Project News and Details from the Trenches

Monday, March 14, 2016

LLVM Weekly - #115, Mar 14th 2016

Welcome to the one hundred and fifteenth 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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We have an LLVM-related research position currently being advertised here at the University of Cambridge Computer Lab. If you'd like an informal chat about what it's like working in this group or on this project please don't hesitate to get in touch with me.

News and articles from around the web

LLVM and Clang 3.8 have now been released. Check out the LLVM and Clang release notes for a run-down of the new features.

It's GDC this week and if you're attending you may be interested that there's an LLVM meetup scheduled for Thursday.

Felix Angell has a detailed blog post introducing generating LLVM IR from Go.

On the mailing lists

LLVM commits

  • Loop invariant code motion learnt the ability the exploit the fact a memory location is known to be thread-local. r263072.

  • A new llvm.experimental.deoptimize intrinsic has been added. r26328.

  • A ThinLTOCodeGenerator was added in order to provide a proof-of-concept implementation. r262977.

  • The Sparc backend gained support for co-processor condition branching and conditional traps. r263044.

Clang commits

  • Clang gained support for the [[nodiscard]] attribute. r262872.

  • New AST matchers were added for addrLabelExpr, atomicExpr, binaryCondtionalOperator, designatedINitExpr, designatedInitExpr, designatorCountIs, hasSyntacticForm, implicitValueINitExpr, labelDecl, opaqueValueExpr, parenListExpr, predefinedExpr, requiresZeroInitialization, and stmtExpr. r263027.

Other project commits

  • Error and warning messages in LLD are now more consistent. r263125.

  • Documentation on the new ELF and COFF LLD linkers has been updated. r263336.