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GCC 4.8 Has More Optimizations

Compiler

Published on 14 November 2012 01:21 AM EST
Written by Michael Larabel in Compiler
4 Comments

The GCC 4.8 compiler when released in early 2013 will have a number of new optimizations.

GCC 4.8 features improvements to link-time optimizations (LTO) with the LTO partitioning having been re-written for improved reliability and maintainability while fixing some link failures (see our GCC 4.7 LTO benchmarks). Aside from improving LTO, there's also improved inter-procedural optimizations. The interprocedural optimization improvements come from a new symbol table, improvements to the inline heuristicsm and better inlining decisions.

GCC 4.8 has also addressed some scalability bottlenecks within GCC's optimization passes that will benefit extremely large functions. There's also a new -ftree-partial-pre option for controlling partial redundancy elimination (PRE) optimizations.

Last but not least there is a new general optimization level for fast compilation but with superior debugging capabilities and still reasonable run-time performance.

Other new features to version 4.8 of the GNU Compiler Collection are talked about in this article.

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 .
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