(module
  (func
    v128.const i8x16 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00
    i32x4.bitmask ;; if this checks as i8x16 lane, the result here becomes non-zero, therefore unreachable.
    (if (then unreachable))

    v128.const i8x16 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00
    i16x8.bitmask ;; if this treats as i8x16 lane, the result here becomes non-zero, therefore unreachable.
    (if (then unreachable))
  )
  (start 0)
)