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NVIDIA informed us of some great news: __builtin_bit_cast has been supported since CUDA 11.3 in all Standard modes. Our minimum supported and tested version is CUDA 11.6 (since #2791), so we can fully remove our memcpy workaround.

Fixes internal VSO-1601623 / AB#1601623 . High priority as this blocks NVIDIA.

@StephanTLavavej StephanTLavavej added bug Something isn't working high priority Important! labels Aug 31, 2022
@StephanTLavavej StephanTLavavej requested a review from a team as a code owner August 31, 2022 20:47
@StephanTLavavej StephanTLavavej self-assigned this Aug 31, 2022
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I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed.

@StephanTLavavej StephanTLavavej merged commit af8adfa into microsoft:main Sep 1, 2022
@StephanTLavavej StephanTLavavej deleted the cuda-bit-cast branch September 1, 2022 01:13
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