Fix the input tensors inplace update issue for e2e tests

Fix the inplace update tensor issue we had
where the torchscript execution would update the input value inplace
resulting the actual test not being able to see the original input
value.

python/torch_mlir_e2e_test/test_suite/index_put.py

@@ -133,10 +133,7 @@ class IndexPutImpl1DFloatAccumulateModule(torch.nn.Module):
         ([-1], torch.float32, True),
     ])
     def forward(self, input, index, value):
-        # Since the input is updated in-place, we pass input.clone() in place
+      return torch.ops.aten._index_put_impl_(input, (index,), value,
-        # of input to avoid wrong results.
-        return torch.ops.aten._index_put_impl_(input.clone(), (index, ),
-                                               value,
                                             accumulate=True,
                                             unsafe=False)
 
@@ -214,10 +211,7 @@ class IndexPutImpl1DIntAccumulateModule(torch.nn.Module):
         ([-1], torch.int64, True),
     ])
     def forward(self, input, index, value):
-        # Since the input is updated in-place, we pass input.clone() in place
+      return torch.ops.aten._index_put_impl_(input, (index,), value,
-        # of input to avoid wrong results.
-        return torch.ops.aten._index_put_impl_(input.clone(), (index, ),
-                                               value,
                                           accumulate=True,
                                           unsafe=False)
 

python/torch_mlir_e2e_test/torchscript/framework.py

@@ -58,6 +58,24 @@ Trace = List[TraceItem]
 # this type.
 CompiledArtifact = TypeVar('CompiledArtifact')
 
+# Clone all the tensor values.
+def clone_torch_script_value(v: TorchScriptValue):
+    if isinstance(v, torch.Tensor):
+        return v.clone()
+    if isinstance(v, tuple):
+        return tuple(clone_torch_script_value(field) for field in v)
+    if isinstance(v, list):
+        return [clone_torch_script_value(item) for item in v]
+    if isinstance(v, dict):
+        return {
+            clone_torch_script_value(key): clone_torch_script_value(val)
+            for key, val in v.items()
+        }
+    if isinstance(v, float) or isinstance(v, int) or isinstance(v, str):
+        return v
+    assert False, "unhandled cloning of TorchScriptValue value type"
+
+
 
 class TestConfig(abc.ABC):
     """The interface implemented by backends to run tests.
@@ -208,16 +226,20 @@ class _Tracer:
     The inputs and outputs of each call are recorded in a Trace. Recursive
     property accesses are also traced.
     """
+
     def __init__(self, wrapped, property_base_path: List[str], trace: Trace):
         self.__wrapped__ = wrapped
         self.__trace__ = trace
         self.__property_base_path__ = property_base_path
 
     def __call__(self, *args, **kwargs):
+        # Clone the inputs to capture the original tensors values. This is
+        # needed because inplace mutation might happen to the input tensors.
+        inputs = [clone_torch_script_value(arg) for arg in args]
         output = self.__wrapped__(*args, **kwargs)
         self.__trace__.append(
             TraceItem(symbol=".".join(self.__property_base_path__),
-                      inputs=args,
+                      inputs=inputs,
                       output=output))
         return output