chore: import upstream snapshot with attribution

python/tvm/ir/json_compact.py

@@ -0,0 +1,87 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+"""Tool to upgrade json from historical versions."""
+
+import json
+
+
+def get_version(jgraph):
+    """
+    Get the tvm version from the json graph.
+
+    Parameters
+    ----------
+    jgraph : dict
+        The json graph.
+    """
+    return jgraph["metadata"]["tvm_version"]
+
+
+def create_updater(node_map, from_ver, to_ver):
+    """Create an updater to update json loaded data.
+
+    Parameters
+    ----------
+    node_map : Map[str, Function]
+        Map from type_key to updating function
+
+    from_ver : str
+        Prefix of version that we can accept,
+
+    to_ver : str
+        The target version.
+
+    Returns
+    -------
+    fupdater : function
+        The updater function
+    """
+
+    def _updater(data):
+        assert get_version(data).startswith(from_ver)
+        nodes = data["nodes"]
+        for idx, item in enumerate(nodes):
+            f = node_map.get(item["type"], None)
+            if isinstance(f, list):
+                for fpass in f:
+                    item = fpass(item, nodes)
+            elif f:
+                item = f(item, nodes)
+            nodes[idx] = item
+        data["metadata"]["tvm_version"] = to_ver
+        return data
+
+    return _updater
+
+
+def upgrade_json(json_str):
+    """Update json from a historical version.
+
+    Parameters
+    ----------
+    json_str : str
+        A historical json file.
+
+    Returns
+    -------
+    updated_json : str
+        The updated version.
+    """
+    data = json.loads(json_str)
+    if "metadata" not in data and "attrs" in data:
+        raise ValueError("Legacy json graph format detected, we don't support it anymore.")
+    return json.dumps(data, indent=2)