{"ast_node_type":"variable","tokens":[{"end":90,"kind":"keyword","start":0,"text":"let"}]}
        let lo = bx.context.new_rvalue_vector_perm(None, lo_nibble, lo_nibble, masked_hi);
        let hi = bx.context.new_rvalue_vector_perm(None, hi_nibble, hi_nibble, masked_lo);