Minor fix - check for DTensor on igpu platform (#3531)

Author: apbose

py/torch_tensorrt/dynamo/backend/backends.py

@@ -21,6 +21,7 @@
     repair_input_aliasing,
 )
 from torch_tensorrt.dynamo.utils import (
+    is_tegra_platform,
     parse_dynamo_kwargs,
     prepare_inputs,
     set_log_level,
@@ -80,10 +81,14 @@ def aot_torch_tensorrt_aten_backend(
             fw_compiler=_pretraced_backend_autograd,
             decompositions=settings_aot_autograd["decompositions"],
         )(gm, sample_inputs)
-    if any(isinstance(tensor, DTensor) for tensor in sample_inputs):
-        logger.warning(
-            "It is recommended to run the model with use_distributed_mode_trace = True since there are distributed tensors in the input which is not supported in aot_export_joint_simple"
-        )
+
+    if is_tegra_platform():
+        from torch.distributed.tensor import DTensor
+
+        if any(isinstance(tensor, DTensor) for tensor in sample_inputs):
+            logger.warning(
+                "It is recommended to run the model with use_distributed_mode_trace = True since there are distributed tensors in the input which is not supported in aot_export_joint_simple"
+            )
     return _pretraced_backend(gm, sample_inputs, settings, engine_cache)
 
 

py/torch_tensorrt/dynamo/conversion/_ConversionContext.py

@@ -2,7 +2,7 @@
 
 import numpy as np
 from torch_tensorrt.dynamo._settings import CompilationSettings
-from torch_tensorrt.fx.types import TRTNetwork
+from torch_tensorrt.dynamo.types import TRTNetwork
 
 
 @dataclass