chore: import upstream snapshot with attribution

python/tvm/script/ir_builder/__init__.py

@@ -0,0 +1,48 @@
+# 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.
+"""The ir_builder subpackage of TVMScript.
+
+Per-dialect builder submodules (``tvm.script.ir_builder.tirx``, etc.) are
+resolved lazily via :data:`tvm.script._DIALECT_REGISTRY`.  When a dialect
+is accessed (e.g. ``tvm.script.ir_builder.tirx``), this subpackage's
+``__getattr__`` looks up the dialect in ``_DIALECT_REGISTRY`` and imports
+``<dialect_module_path>.builder`` (e.g. ``tvm.tirx.script.builder``),
+caching the result so subsequent accesses skip ``__getattr__``.
+
+The IR layer is foundational and is NOT registered as a dialect — its
+builder lives as a real submodule ``tvm.script.ir_builder.ir``.
+
+See :mod:`tvm.script` for a full description of the dialect resolution
+mechanism, including the ``_DialectRedirectFinder`` that handles
+deep statement-form imports.
+"""
+
+import importlib
+from typing import Any
+
+from .base import IRBuilder
+
+
+def __getattr__(name: str) -> Any:
+    # Lazy import to avoid loading tvm.script during dialect bootstrap.
+    from tvm.script import _DIALECT_REGISTRY  # pylint: disable=import-outside-toplevel
+
+    if name in _DIALECT_REGISTRY:
+        module = importlib.import_module(f"{_DIALECT_REGISTRY[name]}.builder")
+        globals()[name] = module
+        return module
+    raise AttributeError(f"module 'tvm.script.ir_builder' has no attribute {name!r}")