{"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"sym::simd_ctlz"}]}
            sym::simd_ctlz | sym::simd_cttz => {
            sym::simd_bswap if int_size == 8 => Ok(args[0].immediate()),
                // for the (int, i1 immediate) pair, the second arg adds `(0, true) => poison`