[slimtensor] Add aoti_torch_delete_tensor_object for SlimTensor

backends/cuda/runtime/shims/memory_slim.cpp

@@ -122,6 +122,20 @@ AOTITorchError aoti_torch_empty_strided(
   return Error::Ok;
 }
 
+AOTITorchError aoti_torch_delete_tensor_object(Tensor* tensor) {
+  ET_CHECK_OR_RETURN_ERROR(
+      tensor != nullptr,
+      InvalidArgument,
+      "aoti_torch_delete_tensor_object: tensor is null");
+
+  // SlimTensor uses SharedPtr for storage, so simply deleting the tensor
+  // will automatically handle reference counting and free the underlying
+  // storage when no more references exist.
+  delete tensor;
+
+  return Error::Ok;
+}
+
 } // extern "C"
 
 } // namespace executorch::backends::cuda

backends/cuda/runtime/shims/memory_slim.h

@@ -79,6 +79,18 @@ AOTI_SHIM_EXPORT AOTITorchError aoti_torch_empty_strided(
     int32_t device_index,
     Tensor** ret_new_tensor);
 
+/**
+ * Deletes a tensor object and frees associated resources.
+ *
+ * For SlimTensor, the underlying storage uses SharedPtr-based reference
+ * counting. When the last tensor referencing the storage is deleted,
+ * the memory is automatically freed.
+ *
+ * @param tensor Pointer to the tensor to delete (must not be null)
+ * @return AOTITorchError error code (Error::Ok on success)
+ */
+AOTI_SHIM_EXPORT AOTITorchError aoti_torch_delete_tensor_object(Tensor* tensor);
+
 } // extern "C"
 
 } // namespace executorch::backends::cuda

backends/cuda/runtime/shims/tests/targets.bzl

@@ -73,3 +73,4 @@ def define_common_targets():
     # SlimTensor-based shim tests
     cuda_shim_slim_cpp_unittest("aoti_torch_empty_strided")
     cuda_shim_slim_cpp_unittest("aoti_torch_create_tensor_from_blob_v2")
+    cuda_shim_slim_cpp_unittest("aoti_torch_delete_tensor_object")