[LLVMdev] LLVM Weekly - #57, Feb 2nd 2015

[Aaron Ballman]

Also of importance this week, we are considering changing our minimum
compiler version requirements to drop support for Visual Studio 2012.
For more information, please see the thread at:
http://lists.cs.uiuc.edu/pipermail/cfe-dev/2015-January/041239.html

~Aaron

On Mon, Feb 2, 2015 at 8:49 AM, Alex Bradbury <asb at asbradbury.org> wrote:
> LLVM Weekly - #57, Feb 2nd 2015
> ===============================
>
> If you prefer, you can read a HTML version of this email at
> <http://llvmweekly.org/issue/57>.
>
> Welcome to the fifty-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](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.
>
> I've been at FOSDEM this weekend in Brussels (which is why this week's issue
> is perhaps a little shorter than usual!). Most talks were recorded and I'll be
> linking to the videos from the LLVM devroom once they're up. For those
> interested, you can [see the slides from my lowRISC talk
> here](https://speakerdeck.com/asb/lowrisc-the-path-to-an-open-source-soc). If
> you want to chat about the project, you may want to join #lowRISC on
> irc.oftc.net.
>
>
> ## News and articles from around the web
>
> Eli Bendersky has written a useful [introduction to using the llvmlite Python
> to LLVM
> binding](http://eli.thegreenplace.net/2015/building-and-using-llvmlite-a-basic-example/),
> which was borne out of the Numba project.
>
> LLVM/Clang 3.6-rc2 [has been
> tagged](http://article.gmane.org/gmane.comp.compilers.llvm.devel/81600) and is
> ready for testing.
>
> The next LLVM bay-area social is taking place [on Feb 5th at
> 7pm](http://article.gmane.org/gmane.comp.compilers.clang.devel/41012/).
>
> The EuroLLVM [call for
> papers](http://article.gmane.org/gmane.comp.debugging.lldb.devel/6413/) closes
> on Feb 16th.
>
>
> ## On the mailing lists
>
> * David Majneer has attempted to describe the often confusing 'poison'
> semantics for LLVM, and [submitted an
> RFC](http://article.gmane.org/gmane.comp.compilers.llvm.devel/81383). Masses
> of discussion follows.
>
> * Dylan McKay has been working on an LLVM backend for AVR and has come to the
> mailing list with two questions on instruction encoding in the last week.
> They're interesting questions with useful answers - [how to modify the
> encoding based on target
> features](http://article.gmane.org/gmane.comp.compilers.llvm.devel/81531) and
> [how to encode instructions with inconsistent
> formats](http://article.gmane.org/gmane.comp.compilers.llvm.devel/81613/).
>
> * Saleem Abdulrasool [kicked off a long discussion on where libunwind should
> live](http://article.gmane.org/gmane.comp.compilers.llvm.devel/81577).
>
> * Andrew Kaylor has posted an [RFC on adding support for native windows C++
> exception
> handling](http://article.gmane.org/gmane.comp.compilers.llvm.devel/81284).
>
> * Matt Arsenault has posted an [RFC on adding and ISD node for fused multiply
> add
> operations](http://article.gmane.org/gmane.comp.compilers.llvm.devel/81443).
>
> * A question about the [meaning of
> RAUW](http://article.gmane.org/gmane.comp.compilers.llvm.devel/81323) is a
> good opportunity to highlight the existence of the very handy [LLVM
> lexicon](http://llvm.org/docs/Lexicon.html).
>
>
> ## LLVM commits
>
> * A simple in-process fuzzer was added to LLVM.
> [r227252](http://reviews.llvm.org/rL227252).
>
> * The programmer's manual gained a section about type hierarchies,
> polymorphism, and virtual dispatch.
> [r227292](http://reviews.llvm.org/rL227292).
>
> * The upstreaming of Sony's patches for their PS4 compiler started with the
> addition of the PS4 target triple.
> [r227060](http://reviews.llvm.org/rL227060).
>
> * DataLayout now lives again in the TargetMachine rather than the
> TargetSubtagertInfo. [r227113](http://reviews.llvm.org/rL227113).
>
> * RuntimeDyld learned to support weak symbols.
> [r227228](http://reviews.llvm.org/rL227228).
>
> * LLVM gained a new tool, llvm-pdbdump to dump the contents of Microsoft PDB
> ('Program DataBase') files, including debug tables.
> [r227241](http://reviews.llvm.org/rL227241),
> [r227257](http://reviews.llvm.org/rL227257).
>
> * The loop vectorizer now supports an arbitrary constant step for its
> induction variables, rather than just -1 or +1.
> [r227557](http://reviews.llvm.org/rL227557).
>
>
> ## Clang commits
>
> * The clang-format-fuzzer tool was added, which builds on the LLVM fuzzer lib.
> [r227354](http://reviews.llvm.org/rL227354).
>
> * MS ABI work continues with proper support for setjmp.
> [r227426](http://reviews.llvm.org/rL227426).
>
> * Clang started to learn about the PS4 target triple.
> [r227194](http://reviews.llvm.org/rL227194).
>
>
> ## Other project commits
>
> * The PowerPC ELF target was dropped from lld.
> [r227320](http://reviews.llvm.org/rL227320).
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