2018 EuroLLVM Developers’ Meeting: D. Das “An Introduction to AMD Optimizing C/C++ Compiler ”

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An Introduction to AMD Optimizing C/C++ Compiler - Dibyendu Das AMD

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In this paper we introduce some of the optimizations that are a part of AMD C/C++ Optimizing Compiler 1.0 (AOCC 1.0) which was released in May 2017 and is based on LLVM Compiler release 4.0.0. AOCC is AMD’s CPU performance compiler which is aimed at optimizing the performance of programs running on AMD processors. In particular, AOCC 1.0 is tuned to deliver high performance on AMD’s EPYC(TM) server processors. The performance results for SPECrate®2017_int_base, SPECrate®2017_int_peak [1], SPECrate®2017_fp_base and SPECrate®2017_fp_peak [2] that we include in the paper show that AOCC delivers excellent performance thereby enhancing the power of the AMD EPYC(TM) processor. The optimizations fall into the categories of loop vectorization, SLP vectorization, data layout optimizations and loop optimizations. We shall introduce and provide some details of each optimization.

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