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vector_algorithms.cpp: Add vzeroupper, so that it is there even in /Od #3630

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StephanTLavavej merged 2 commits into from
Apr 7, 2023
Merged

vector_algorithms.cpp: Add vzeroupper, so that it is there even in /Od #3630

StephanTLavavej merged 2 commits into from
Apr 7, 2023

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@AlexGuteniev AlexGuteniev commented Apr 6, 2023

Fix #3601

@AlexGuteniev AlexGuteniev requested a review from a team as a code owner April 6, 2023 14:29
@StephanTLavavej StephanTLavavej added the performance Must go faster label Apr 6, 2023
@StephanTLavavej StephanTLavavej changed the title vector_algorithms.cpp: Add vzeroupper, so that is is there even in /Od vector_algorithms.cpp: Add vzeroupper, so that it is there even in /Od Apr 6, 2023
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StephanTLavavej reviewed Apr 6, 2023
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StephanTLavavej commented Apr 6, 2023

Thanks! 😻 I verified that all occurrences of _Use_avx2() have been updated, and that the guard type is used if and only if an early return is possible. FYI @strega-nil-ms I pushed a small commit to enhance the guard type after you approved (no functional change, just resists future misuse).

@StephanTLavavej StephanTLavavej mentioned this pull request Apr 6, 2023
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@StephanTLavavej StephanTLavavej self-assigned this Apr 7, 2023
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StephanTLavavej commented Apr 7, 2023

I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed.

@StephanTLavavej StephanTLavavej merged commit e6a12f7 into microsoft:main Apr 7, 2023
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StephanTLavavej commented Apr 7, 2023

Thanks for comprehensively fixing this performance issue! 🛠️ 🚀 ✅

@AlexGuteniev AlexGuteniev deleted the vzeroupper branch April 8, 2023 07:19
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@StephanTLavavej StephanTLavavej StephanTLavavej approved these changes

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@strega-nil-ms strega-nil-ms strega-nil-ms approved these changes

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<algorithm>: vectorized algorithms hurt performance.

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