{"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
    let b = _mm256_setr_epi64x(300, 400, 700, 800);
    let a = _mm256_setr_epi64x(100, 200, 500, 600);
    let r = _mm256_permute2x128_si256::<0b00_01_00_11>(a, b);