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Apply LLVM patch for faster AVX512 max operation #31289

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nlw0 opened this issue Mar 7, 2019 · 2 comments
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Apply LLVM patch for faster AVX512 max operation #31289

nlw0 opened this issue Mar 7, 2019 · 2 comments

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@nlw0
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nlw0 commented Mar 7, 2019

This is a request to pull a patch from LLVM into the Julia patches. It solves a performance issue with the vectorized "max" operator in AVX512 machines. This is the bug report:
https://bugs.llvm.org/show_bug.cgi?id=40984

The patch:
llvm/llvm-project@3acc423

Also related:
eschnett/SIMD.jl#47
@Keno
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Keno commented Mar 7, 2019

Wanna send a PR to this effect? Just put the patch in deps/patches and add it to the list in deps/llvm.mk.

@nlw0
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nlw0 commented Mar 7, 2019

I'll try

@nlw0 nlw0 mentioned this issue Mar 7, 2019
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@Keno Keno closed this as completed Apr 20, 2019
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@nlw0 @Keno