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      "source_info" : {
        "filename" : "include/checksum.p4",
        "line" : 28,
        "column" : 8,
        "source_fragment" : "update_checksum(hdr.ipv4.isValid(), ..."
      },
      "target" : ["ipv4", "hdr_checksum"],
      "type" : "generic",
      "calculation" : "calc",
      "verify" : false,
      "update" : true,
      "if_cond" : {
        "type" : "expression",
        "value" : {
          "op" : "d2b",
          "left" : null,
          "right" : {
            "type" : "field",
            "value" : ["ipv4", "$valid$"]
          }
        }
      }
    },
    {
      "name" : "cksum_0",
      "id" : 1,
      "source_info" : {
        "filename" : "include/checksum.p4",
        "line" : 57,
        "column" : 8,
        "source_fragment" : "verify_checksum(hdr.ipv4.isValid(), ..."
      },
      "target" : ["ipv4", "hdr_checksum"],
      "type" : "generic",
      "calculation" : "calc_0",
      "verify" : true,
      "update" : false,
      "if_cond" : {
        "type" : "expression",
        "value" : {
          "op" : "d2b",
          "left" : null,
          "right" : {
            "type" : "field",
            "value" : ["ipv4", "$valid$"]
          }
        }
      }
    }
  ],
  "force_arith" : [],
  "extern_instances" : [],
  "field_aliases" : [
    [
      "queueing_metadata.enq_timestamp",
      ["standard_metadata", "enq_timestamp"]
    ],
    [
      "queueing_metadata.enq_qdepth",
      ["standard_metadata", "enq_qdepth"]
    ],
    [
      "queueing_metadata.deq_timedelta",
      ["standard_metadata", "deq_timedelta"]
    ],
    [
      "queueing_metadata.deq_qdepth",
      ["standard_metadata", "deq_qdepth"]
    ],
    [
      "intrinsic_metadata.ingress_global_timestamp",
      ["standard_metadata", "ingress_global_timestamp"]
    ],
    [
      "intrinsic_metadata.egress_global_timestamp",
      ["standard_metadata", "egress_global_timestamp"]
    ],
    [
      "intrinsic_metadata.lf_field_list",
      ["standard_metadata", "lf_field_list"]
    ],
    [
      "intrinsic_metadata.mcast_grp",
      ["standard_metadata", "mcast_grp"]
    ],
    [
      "intrinsic_metadata.resubmit_flag",
      ["standard_metadata", "resubmit_flag"]
    ],
    [
      "intrinsic_metadata.egress_rid",
      ["standard_metadata", "egress_rid"]
    ],
    [
      "intrinsic_metadata.recirculate_flag",
      ["standard_metadata", "recirculate_flag"]
    ],
    [
      "intrinsic_metadata.priority",
      ["standard_metadata", "priority"]
    ]
  ],
  "program" : "fabric.p4",
  "__meta__" : {
    "version" : [2, 18],
    "compiler" : "https://github.com/p4lang/p4c"
  }
}