1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

LLVM 3.2 Vastly Improves Processor Support

Compiler

Published on 15 December 2012 04:05 AM EST
Written by Michael Larabel in Compiler
Comment On This Article

The soon-to-be-released LLVM 3.2 compiler infrastructure will expand upon its coverage of processor support and CPU capabilities.

Some of the noteworthy improvements to the LLVM 3.2 processor/hardware support includes:

- Minor code-generation improvements for x86 and x86_64.

- With the x86/x86_64 improvements, there's particular improvements around LLVM's support for AVX2. The Advanced Vector Extensions 2, which will premiere with Intel's Haswell processors next year, build upon the AVX support originally introduced in the Sandy Bridge processors. The additions found in Advanced Vector Extensions 2 / Haswell New Instructions include expanding most integer instructions to 256 bits, three-operand general-purpose bit manipulation and multiply, Gather support to enable vector elements to be loaded from non-contiguous memory, DWORD/QDWORD-granularity any-to-any permutes, vector shifts, and three-operand fused multiply-accumulate support.

- Better support for PowerPC processors with LLVM 3.2.

- Support, including performance tuning, for the ARM-based A6 Swift processor. The A6 Swift is Apple's SoC found within the iPhone 5 that is twice as fast as the A5 ARM SoC.

- The LLVM ARM support now includes a full-featured macro assembler. This ARM integrated assembler has support for Thumb1/Thumb2/ARM modes along with VFP2, VFP3, and NEON extensions.

- The MIPS target improvements include integrated assembler support, fast calling convention, an Android MIPS tool-chain for Clang, a MIPS32/MIPS64 disassembler, experimental MIPS32 DSP intrinsics handling, experimental support for MIPS16, and improved register allocation.

Aside from the processor-specific work in LLVM 3.2, this compiler infrastructure update due out this month also features an automatic loop vectorizer, Polly optimizations, and other improvements to be talked about in future Phoronix articles.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. AMD R600g/RadeonSI Performance On Linux 3.16 With Mesa 10.3-devel
  2. Intel Pentium G3258 On Linux
  3. SilverStone Precision PS10
  4. ASRock Z97 Extreme6
Latest Linux Articles
  1. Nouveau vs. Radeon vs. Intel Tests On Linux 3.16, Mesa 10.3-devel
  2. KVM Benchmarks On Ubuntu 14.10
  3. X.Org Server 1.16 Officially Released With Terrific Features
  4. Ubuntu With Linux 3.16 Smashes OS X 10.9.4 On The MacBook Air
Latest Linux News
  1. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  2. Cauldron 2014: GCC & LLVM Will Look To Collaborate More
  3. GCC Receives ACM Programming Languages Software Award
  4. KDE 4.14 Beta 3 Released
  5. A New Video Has Us Real Excited About The New UT For Linux
  6. CoreOS Experiences Its First Stable Release
  7. GNOME 3.13.4 Continues Working On Wayland & More
  8. Wine 1.7.23 Has Initial Support For 64-bit Android Builds
  9. FreeBSD Developing A New Automounter, Other Features
  10. Guix 0.7 Can Now Install The GNU Operating System
Latest Forum Discussions
  1. Debian + radeonsi
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. How To Setup Radeon DPM On Ubuntu Linux
  4. Open-source drivers on ATI R7 260X
  5. New build, first Linux PC, what could go wrong? ;)
  6. AMD "Hawaii" Open-Source GPU Acceleration Still Not Working Right
  7. Radeon related kernel bug??
  8. how the US intellegentia operates: