Fix unconvertible_ops as per #89261 (#89299)

Fixes #89261

Pull Request resolved: https://github.com/pytorch/pytorch/pull/89299
Approved by: https://github.com/justinchuby, https://github.com/BowenBao
diff --git a/test/onnx/test_utility_funs.py b/test/onnx/test_utility_funs.py
index 51adaef..5d1cdc5 100644
--- a/test/onnx/test_utility_funs.py
+++ b/test/onnx/test_utility_funs.py
@@ -124,6 +124,18 @@
         _, unconvertible_ops = utils.unconvertible_ops(module, (x,), opset_version=12)
         self.assertEqual(unconvertible_ops, [])
 
+    def test_it_returns_empty_list_when_model_contains_supported_inplace_ops(self):
+        class SkipConnectionModule(torch.nn.Module):
+            def forward(self, x):
+                out = x
+                out += x
+                out = torch.nn.functional.relu(out, inplace=True)
+
+        module = SkipConnectionModule()
+        x = torch.randn(4, 4)
+        _, unconvertible_ops = utils.unconvertible_ops(module, (x,), opset_version=13)
+        self.assertEqual(unconvertible_ops, [])
+
 
 @parameterized.parameterized_class(
     [
diff --git a/torch/onnx/utils.py b/torch/onnx/utils.py
index 67dd719..36d7fdb 100644
--- a/torch/onnx/utils.py
+++ b/torch/onnx/utils.py
@@ -1333,7 +1333,9 @@
             # eliminated in the conversion passes. Users may still see errors caused
             # by prim ops even though they don't show up in the list.
             continue
-        if not registration.registry.is_registered_op(domain_op, opset_version):
+        if not registration.registry.is_registered_op(
+            domain_op.rstrip("_"), opset_version
+        ):
             # We consider all registered ops supported, even though some of them are
             # only partially supported, because there is not yet a good way to check
             # if an op is fully supported.