chore: import upstream snapshot with attribution

tests/python/ir/test_unique_name_supply.py

@@ -0,0 +1,62 @@
+# 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.
+import tvm
+import tvm.testing
+from tvm import relax as rx
+from tvm.ir.supply import UniqueNameSupply
+
+
+def _empty_relax_func():
+    return rx.Function([], rx.Tuple([]))
+
+
+def test_fresh_name_empty_string():
+    """Empty name should produce a valid variable name, not an empty string."""
+    ns = UniqueNameSupply("")
+    name = ns.fresh_name("", add_prefix=False)
+    assert name == "v"
+    name2 = ns.fresh_name("", add_prefix=False)
+    assert name2 == "v_1"
+
+
+def test_fresh_name_empty_string_with_prefix():
+    """Empty name with prefix should produce a valid variable name."""
+    ns = UniqueNameSupply("prefix")
+    name = ns.fresh_name("", add_prefix=True)
+    assert name == "prefix_v"
+    name2 = ns.fresh_name("", add_prefix=True)
+    assert name2 == "prefix_v_1"
+
+
+def test_ir_module_from_expr_freshens_main_collision():
+    main_gv = tvm.ir.GlobalVar("main")
+    mod = tvm.IRModule.from_expr(_empty_relax_func(), {main_gv: _empty_relax_func()})
+
+    assert sorted(gvar.name_hint for gvar in mod.get_global_vars()) == ["main", "main_1"]
+
+
+def test_ir_module_from_expr_reuses_existing_global_symbol():
+    foo_gv = tvm.ir.GlobalVar("foo")
+    func = _empty_relax_func().with_attr("global_symbol", "foo")
+    mod = tvm.IRModule.from_expr(func, {foo_gv: _empty_relax_func()})
+
+    assert mod.get_global_var("foo").same_as(foo_gv)
+    assert [gvar.name_hint for gvar in mod.get_global_vars()] == ["foo"]
+
+
+if __name__ == "__main__":
+    tvm.testing.main()