Simon Pilgrim 8d7df8bba1
[X86] Allow AVX2 per-element shift intrinsics to be used in constexpr (#154780)
This handles constant folding for the AVX2 per-element shift intrinsics, which handle out of bounds shift amounts (logical result = 0, arithmetic result = signbit splat)

AVX512 intrinsics will follow in follow up patches

First stage of #154287
2025-08-22 09:24:24 +01:00
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