[LLVMdev] LLVM Weekly - #63, Mar 16th 2015

Alex Bradbury asb at asbradbury.org
Mon Mar 16 08:32:37 PDT 2015

LLVM Weekly - #63, Mar 16th 2015

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Welcome to the sixty-third 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](http://asbradbury.org). 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 at asbradbury.org>, or
@llvmweekly or @asbradbury on Twitter.

## News and articles from around the web

LLVM is taking part in [Google Summer of
Code](https://developers.google.com/open-source/soc/) as a mentoring
organisation. Students can earn a $5500 stipend by working on open source
projects over the summer, and applications upon today (March 16th). See
for the list of mentoring organisations advertising LLVM-related projects.
Please do help spread the word. I am biased, but I'd like to draw particular
attention to the wide variety of [lowRISC GSoC
ideas](http://www.lowrisc.org/docs/gsoc-2015-ideas/), including a project to
implement an LLVM pass using tagged memory to provide protection against
control-flow hijacking.

Version 0.11 of Pocl, the portable open-source OpenCL implementation [has been
Additions in this release include initial Android support and MIPS
architecture support.

Version 1.11 of TCE, the TTA-based (Transport Triggered Architecture)
Co-design Environment, which uses LLVM [has been
This release adds support for LLVM 3.6.

There will be a [LLVM
microconference](http://wiki.linuxplumbersconf.org/2015:llvm) at the Linux
Plumbers Conference in August. There is a [call for

## On the mailing lists

* If you enjoy bikesheds, this thread may be for you. Renato Golin has kicked
off a [thread on commit message

* Rui Ueyama has posted to the mailing list [summarising his recent work on
LLD performance
The follow up responses discuss potential remaining bottlenecks.

* William Moses is [interested in parallel extensions to LLVM
IR](http://article.gmane.org/gmane.comp.compilers.llvm.devel/83236), and the
thread spawned quite a few interesting responses.

* Mohammad Kazem's [question about counting loads and stores of
elicited some useful responses.

* Will Dietz who has been maintaining the [unofficial LLVM Github
mirror](https://github.com/llvm-mirror) for the past few years is interested
in [LLVM taking over the service

## LLVM commits

* As DataLayout is now mandatory, LLVM APIs have been updated to use
references to DataLayout. [r231740](http://reviews.llvm.org/rL231740).

* Support was added for part-word atomics on PowerPC.

* Initial work on enhancing ValueTracking to infer known bits of a value from
known-true conditional expressions has landed.

* The PowerPC READMEs have been updated to list potential future enhancements.

* The `llvm.eh.actions` intrinsic has been added.

* The documentation for llvm-cov has been updated.

* The getting started docs now describe CMake as the preferred way to build
LLVM. [r232135](http://reviews.llvm.org/rL232135).

* llvm-vtabledump is now known as llvm-cxxdump.

## Clang commits

* The steady stream of OpenMP patches continues, with the addition of codegen
support for the omp task directive and omp for.

* Copy-constructor closures for MS ABI support has been added.

## Other project commits

* LLD gained support for linker script expression evaluation and parsing of
the MEMORY and EXTERN commands. [r231707](http://reviews.llvm.org/rL231707),

* LLDB gained a `CODE_OWNERS.txt` file.

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