LLVM 3.4 was released in January 2014 with many improvements to the open-source compiler infrastructure.

LLVM 3.4 Articles & Reviews

LLVM Clang 3.4 Compiler Performance Is Doing Good   Software   2013-12-21
LLVM Clang 3.4 SVN Compiler Optimization Level Tests   Software   2013-07-30
LLVM Clang 3.4 Already Has Some Performance Changes   Software   2013-06-27

LLVM 3.4 Linux & Open-Source News

LLVM & Clang Had A Killer 2014 With Lots Of Improvements   LLVM   2015-01-04
The Most Viewed Compiler News & Milestones Of This Year   Programming   2014-12-27
RadeonSI Gallium3D Now Supports GL4 Indirect Drawing Too   Radeon   2014-07-18
LLVM 3.4.2 Brings Bug-Fixes   LLVM   2014-06-20
LLVM 3.4.2 Is Now Ready For Testing   LLVM   2014-05-16
LLVM / Clang 3.5 Will Likely Be Released In August   LLVM   2014-05-14
LLVM 3.4.2 Will Be Released Later This Month   LLVM   2014-05-12
LLVM 3.4.1 Released With R600 GS Support, Other Fixes   LLVM   2014-05-09
Changes So Far For LLVM 3.5   LLVM   2014-05-07
LLVM 3.4.1 Is Now Ready For Testing   LLVM   2014-04-12
LLVM 3.4.1 Point Release Planned For Next Month   LLVM   2014-03-26
Mesa's LunarGLASS Updates Against LLVM 3.4   Mesa   2014-03-22
OpenELEC 4.0 Beta Brings Changes, Based On XBMC 13   Multimedia   2014-03-06
LLVM Point Releases Look Like They Will Finally Happen   LLVM   2014-01-20
LLVM 3.4 Compiler Officially Released With Many Features   LLVM   2014-01-06
LLVM Is At Nearly 2.5 Million Lines Of Code   LLVM   2013-12-26
LLVM 3.4 Isn't Out Yet, But It Will Be Exciting   LLVM   2013-12-23
LLVM Clang OpenMP 4 Support Nears Reality   LLVM   2013-12-09
LLVM Clang 3.4 Is On Track To Arrive This Month   LLVM   2013-12-02
December Should Be Very Exciting For Linux Users   Phoronix   2013-12-02
Mesa 10.0 Delivers Many Exciting New Features   Mesa   2013-11-27
GCC 4.9 Is Now In Bug-Fixes-Only Stage 3 Mode   GNU   2013-11-22
LLVM Now Can Target ARM's Mid-Range Cortex-A12   LLVM   2013-11-22
ARM Cortex-A7 Support Appears In LLVM & Clang   LLVM   2013-11-21
RadeonSI Gallium3D CIK Gets 2D Tiling, MSAA   Radeon   2013-11-20
LLVM 3.4 Branched, Christmas Compiler Present Planned   LLVM   2013-11-20
Libdrm 2.4.48 Has New Hardware Support   Mesa   2013-11-17
Future Work On The AMD GPU LLVM Back-End   AMD   2013-11-15
AMD Hawaii Code Published For X.Org DDX, Mesa   AMD   2013-11-13
LLVM Post-3.4 To Most Likely Depend Upon C++11   LLVM   2013-11-10
Clang-Cl Tries To Imitate Visual Studio's Compiler   LLVM   2013-11-05
RadeonSI Gallium3D Gets UBO/TBO Support, OpenGL 3.3   Mesa   2013-11-04
Sea Islands Improvements Come To AMD GPU LLVM Back-End   AMD   2013-10-29
LLVM 3.4 For Christmas, Should Be "Pretty Great"   LLVM   2013-10-28
Features Coming For The LLVM 3.4 Compiler Stack   LLVM   2013-10-27
Sea Islands Gets AMD R600 LLVM Compute Support   AMD   2013-10-23
MSAA Support Lands For R600 LLVM Back-End   Mesa   2013-10-02
Clang-Format Is Taking Good Shape For LLVM 3.4   LLVM   2013-09-15
Transform Feedback, OpenGL 3.0 Ready For RadeonSI   Radeon   2013-09-03
LLVM's LLDB Improves Remote Debugging   Intel   2013-08-27
An LLVM 3.3.1 Point Release Is Likely To Come   AMD   2013-08-24
LLVM Clang 3.4 Enables SLP Vectorizer By Default   LLVM   2013-08-01
LLVM Clang 64-bit ARM (AArch64) Now Supports NEON   LLVM   2013-08-01
Apple, Google Agree On More SLP Vectorization   Programming   2013-07-28
LLVM Drops Support For Older Visual Studio   LLVM   2013-07-24
New LLVM Clang Compiler Benchmarks: 3.2, 3.3, 3.4 SVN   LLVM   2013-07-15
LLVM May Enable The SLP Vectorizer By Default   LLVM   2013-07-14
LLVM/Clang Now Uses Loop Vectorizer At New Levels   LLVM   2013-06-17
An Important Radeon R600 Change In LLVM 3.4   LLVM   2013-06-07
LLVM May Expand Its Use Of The Loop Vectorizer   LLVM   2013-06-06