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 https://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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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
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Jason Henline has posted a very detailed RFC on creating a new parallel runtime library. StreamExecutor wraps both the CUDA and OpenCL runtimes and is used internally at Google.
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Ed Maste has shared an update on linking the FreeBSD base system using LLD. With a few workarounds, the full amd64 FreeBSD system is now buildable.
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Vedant Kumar has shared an RFC on removing redundant profile counter updates.
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Sean Silva is seeking to formalize the 'revert for more design review policy'. Overall, the comments seem to be positive.
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With EuroLLVM coming up this week, people have been advertising their birds of a feather sessions. e.g. the LLVM on PowerPC and SystemZ session and the session on surviving downstream.
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Rafael Espíndola reports that compilation with LLVM and Clang has been getting slower over time. Hal Finkel has some good input on potential areas for improvement.
LLVM commits
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Loop invariant code motion learnt the ability the exploit the fact a memory location is known to be thread-local. r263072.
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A new
llvm.experimental.deoptimizeintrinsic has been added. r26328. -
A ThinLTOCodeGenerator was added in order to provide a proof-of-concept implementation. r262977.
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The Sparc backend gained support for co-processor condition branching and conditional traps. r263044.
Clang commits
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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.