{"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"(\"x86\","}]}
        ("x86", "bmi1") => smallvec!["bmi"],
        ("x86", "rdrand") => smallvec!["rdrnd"],
        ("x86", "cmpxchg16b") => smallvec!["cx16"],