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

What's New In DragonEgg 3.1 For Optimizing GCC

Compiler

Published on 30 May 2012 10:01 AM EDT
Written by Michael Larabel in Compiler
Comment On This Article

In this morning's 11-Way Ivy Bridge compiler comparison were the first benchmarks of LLVM's DragonEgg, but what's new in this GCC plug-in's 3.1 release? Here's a brief overview.

DragonEgg is the unique LLVM-powered plug-in for GCC that allows LLVM optimizers and code generators to cooperate with GCC. It's quite interesting but is often overshadowed by LLVM itself and its own C/Objective-C/C++ Clang compiler. DragonEgg isn't widely used at this point but viewed by many as just an interesting experiment. By default DragonEgg will replace the GCC optimizers with those from LLVM, but there's a compiler option to use both the GCC and LLVM optimizers for "ultimate performance."

DragonEgg takes the optimizers and code generators from LLVM and plugs it into GCC, particularly the 4.5 release or newer where the plug-in architecture is available. DragonEgg is what succeeded LLVM-GCC. The goal of DragonEgg is to eventually support all of GCC's languages, but for now it's namely for C, C++, Fortran, and ADA. The compiler front-end of GCC is still used so it's easier to introduce support for new languages here than writing it up with Clang. There's partial support for Google Go, Java, Objective-C, and Objective-C++ languages with GCC. DragonEgg also works for Darwin, FreeBSD, Debian GNU/kFreeBSD, Linux, and OpenBSD platforms. The code generators work for x86, x86_64, and now ARM.

With DragonEgg 3.1, which was released at the same time as LLVM 3.1 and Clang 3.1 earlier this month, there is now:

- Partial support for GCC 4.7. While DragonEgg is just a GCC plug-in, the interfaces aren't stable and require changes from release-to-release it seems. The DragonEgg ADA support here is said to be poor but other languages should work "fairly well." GCC 4.5 and 4.6 series should still work well with this new version of DragonEgg.

- With DragonEgg 3.1 the code generators now work for ARM processors too, rather than just x86/x86_64.

- Better Fortran optimizations.

- Better optimizations for all languages by passing information about type aliasing and type ranges to LLVM optimizers.

- There's finally a regression test suite.

Additional information and download links are available from dragonegg.llvm.org. Now if you didn't look at them already, check out the 11-way compiler comparison benchmarks for the latest Intel hardware.

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 Articles & Reviews
  1. Ubuntu 15.04 Is The Easy Path To Better Performance On Intel Broadwell
  2. NVIDIA's Latest Maxwell Line-Up Against AMD With Catalyst On Linux
  3. Preliminary Tests Of Intel Sandy Bridge & Ivy Bridge vs. Broadwell
  4. AMD FX-8320E Performance On Linux
  5. Linux Compiler Benchmarks Of LLVM Clang 3.5 vs. LLVM Clang 3.6-rc1
  6. Intel Broadwell HD Graphics 5500: Windows 8.1 vs. Linux
Latest Linux News
  1. LLVM Adds Options To Do Fuzz Testing
  2. Coreboot Now Supports Another Dual-Socket AMD Motherboard
  3. Atomic Mode-Setting/Display Support Progresses In Linux 3.20
  4. NVIDIA 340.76 Brings Three Stable Fixes
  5. Intel Broadwell-U P-State vs. ACPI CPUFreq Scaling Linux Performance
  6. DragonFlyBSD Is Almost To Linux 3.10 Era Intel Graphics Support
  7. New Beta Of Witcher 2 Aims For Greater Performance
  8. NVIDIA Tegra DRM Driver Supports Atomic Mode-Setting In Linux 3.20
  9. Linux "GHOST" Vulnerability Hits Glibc Systems
  10. Linux Game Publishing Remains Offline, Three Years After The CEO Shakeup
Most Viewed News This Week
  1. LibreOffice 4.4 Is Coming Soon With New Features
  2. My Initial Intel Broadwell Linux Experience With The ThinkPad X1 Carbon
  3. Broadwell Linux Ultrabook Running MUCH Cooler Than Haswell
  4. LZHAM 1.0 Lossless Data Compression Codec Released
  5. Linux Users Upset By Chromium's Busted HiDPI Support
  6. Interstellar Marines On Linux With Catalyst: Bull S*#@
  7. Faster VP9 Decoding Is On The Horizon
  8. Radeon DRM Changes For The Linux 3.20 Kernel