[dynamo] Reserve the tensorrt backend name for torch-tensorrt

Author: narendasan

torch/_dynamo/backends/onnxrt.py

@@ -115,9 +115,4 @@ def _call(*initial_args):
             binding.copy_outputs_to_cpu()
         return outputs
 
-    return _call
-
-
-@register_backend
-def tensorrt(gm, example_inputs):
-    return onnxrt(gm, example_inputs, provider="TensorrtExecutionProvider")
+    return _call

torch/_dynamo/backends/tensorrt.py

@@ -0,0 +1,16 @@
+import importlib
+import os
+import tempfile
+
+import torch
+from .common import device_from_inputs, fake_tensor_unsupported
+from .registry import register_backend
+
+'''
+Placeholder for TensorRT backend for dynamo via torch-tensorrt
+'''
+
+# @register_backend
+# def tensorrt(gm, example_inputs):
+#    import torch_tensorrt # type: ignore[import]
+#    pass