NewGVN Merged Into LLVM
Written by Michael Larabel in Compiler on 26 December 2016 at 05:07 PM EST. Add A Comment
COMPILER --
The long in-development "NewGVN" code to provide a new global value numbering (GVN) algorithm within the LLVM code-base has been merged to master.

As explained in one of the reviews, "Initial check-in of a new global value numbering algorithm. The code have been developed by Daniel Berlin over the years, and the new implementation goal is that of addressing shortcomings of the current GVN infrastructure, i.e. long compile time for large testcases, lack of phi predication, no load/store value numbering etc..."

Those wanting to test NewGVN can pull in LLVM from today and pass -mllvm -enable-newgvn to enable the new code-path for testing. More details on llvm-dev.
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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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