{"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"(\"x86\","}]}
        ("x86", "avx512vpclmulqdq") => smallvec!["vpclmulqdq"],
        ("x86", "avx512gfni") => smallvec!["gfni"],
        // NOTE: seems like GCC requires 'avx512bw' for 'avx512vbmi2'.