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AMD AOCC 3.0 Is Here To Help Squeeze A Bit Extra Performance Out Of Zen 3

Submitted by Rianne Schestowitz on Thursday 18th of March 2021 04:51:18 PM Filed under
Graphics/Benchmarks

This week alongside the EPYC 7003 series launch was the introduction of AOCC 3.0 as AMD's Zen-optimized LLVM/Clang downstream. We have started putting this updated compiler through its paces to see what it means for AMD Zen 3 performance.

Within the next week or so I should have some new AOCC vs. LLVM Clang upstream vs. GCC 11 development benchmarks while for today's article is looking at AOCC 2.3 as the prior release compared to the newly-minted AOCC 3.0. The AMD Optimizing C/C++ Compiler 3.0 update re-bases its base against LLVM Clang 12 in its development state towards the end of last year compared to an LLVM Clang 11 base used by AOCC 2.3. AOCC 3.0 is the first AMD compiler release with Zen 3 optimizations, using the same -march=znver3 option of course as upstream LLVM and GCC. AOCC 3.0 is also tuned for AMD's AMDLibM 3.7 math library, improves its FLANG-based Fortran compiler support, offers improvements around OpenMP debugging, and other changes.

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