Intel Core i7 4900MQ Haswell Running LLVM Clang 3.4
Written by Michael Larabel in Compiler on 19 August 2013 at 07:36 AM EDT. 1 Comment
The latest benchmark results to share from the System76 Gazelle Pro, a Linux laptop with an Intel Core i7 4900MQ "Haswell" processor, are some current benchmarks of the LLVM Clang 3.4 SVN compiler development code. Is there much churn over the latest LLVM/Clang 3.3 stable on this latest-generation Intel CPU?

LLVM Clang 3.4 is still months away from being complete but already it's enabled the SLP Vectorizer, gained AArch64 NEON support, expands Loop Vectorizer improvements, and both the LLVM compiler infrastructure and Clang C/C++ compiler front-end have an assortment of other improvements.

The short answer to whether there's any major Intel Haswell gains at the moment for LLVM Clang 3.3 vs. 3.4 SVN is that there's not. Using the latest SVN code from 18 August on this System76 laptop updated to Ubuntu 13.10 is that there's very little change over 3.3 at the moment.

These very early benchmark results can be found in full at 1308197-SO-LLVM34SVN72. Full system details, logs, and all the used benchmarks can be found there with the CFLAGS/CXXFLAGS and both 3.3 and 3.4 SVN were built from source in a Release/Optimized mode. Embedded below are a few of the "interesting" results.






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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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