test interpret
test run
target aarch64
; x86_64 considers the case `i64x2 -> i32x4` to be 'unreachable'

function %unarrow_i64x2(i64x2, i64x2) -> i32x4 {
block0(v0: i64x2, v1: i64x2):
    v2 = unarrow v0, v1
    return v2
}
; run: %unarrow_i64x2([65535 -100000], [5000000000 73]) == [65535 0 4294967295 73]