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Improve the handling of popcnt and tzcnt on arm64 - #128677

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tannergooding merged 2 commits into
dotnet:mainfrom
tannergooding:arm64-popcnt-tzcnt
May 29, 2026
Merged

Improve the handling of popcnt and tzcnt on arm64#128677
tannergooding merged 2 commits into
dotnet:mainfrom
tannergooding:arm64-popcnt-tzcnt

Don't zero for the 64-bit popcount case as it fills the whole register

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