{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"let"}]}
        let mcount_name = match &cx.sess().target.llvm_mcount_intrinsic {
        // See test/CodeGen/mcount.c in clang.
            Some(llvm_mcount_intrinsic) => llvm_mcount_intrinsic.as_ref(),