Constant rustc_middle::ty::layout::MAX_SIMD_LANES

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pub const MAX_SIMD_LANES: u64 = _; // 32_768u64
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The maximum supported number of lanes in a SIMD vector.

This value is selected based on backend support:

  • LLVM does not appear to have a vector width limit.
  • Cranelift stores the base-2 log of the lane count in a 4 bit integer.