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LLVM Clang 3.4 Enables SLP Vectorizer By Default

Compiler

Published on 01 August 2013 08:31 PM EDT
Written by Michael Larabel in Compiler
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As anticipated, the LLVM Clang compiler has now enabled the use of its SLP Vectorizer by default.

LLVM developers have been anticipating turning on SLP vectorization by default and with today's code activity they finally have turned it on when using the -O3 compiler optimization level.

The SLP Vectorizer is able to vectorize certain straight-line code and will then be in place for LLVM/Clang 3.4, after LLVM/Clang 3.3 had enabled use at -O3 of the Loop Vectorizer. The SLP Vectorizer change happened with this commit and this commit.

For those out of the loop on this change that will impact the LLVM 3.4 release, read LLVM 3.3 To Introduce SLP Vectorizer and Benchmarking The SLP Vectorizer On LLVM Clang 3.4.

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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