As mentioned in #4683, VS 2022 17.11 Preview 1 added ARM64 support for __popcnt64 etc. intrinsics. When merging #4695, everything seemed to be okay during MSVC-internal PR checks, but post-merge CI noticed that the MSVC-internal build starts with a checked-in 17.10p4, which is too old to know about the new intrinsics.
I missed this because I forgot that MSVC-internal PR checks don't build ARM64 (only the CI does) and I didn't build ARM64 locally.
The workaround is to check the compiler version. I'll be able to remove this after we update the internal toolset, which should happen very soon.
As mentioned in #4683, VS 2022 17.11 Preview 1 added ARM64 support for
__popcnt64etc. intrinsics. When merging #4695, everything seemed to be okay during MSVC-internal PR checks, but post-merge CI noticed that the MSVC-internal build starts with a checked-in 17.10p4, which is too old to know about the new intrinsics.I missed this because I forgot that MSVC-internal PR checks don't build ARM64 (only the CI does) and I didn't build ARM64 locally.
The workaround is to check the compiler version. I'll be able to remove this after we update the internal toolset, which should happen very soon.