chore: import upstream snapshot with attribution

paddle/phi/api/ext/native_meta_tensor.h

@@ -0,0 +1,36 @@
+// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include "paddle/common/macros.h"
+#include "paddle/phi/common/data_type.h"
+#include "paddle/phi/core/ddim.h"
+
+namespace phi {
+class PADDLE_API NativeMetaTensor {
+ public:
+  NativeMetaTensor() = default;
+  NativeMetaTensor(phi::DataType dtype, phi::DDim dims)
+      : dims_(dims), dtype_(dtype) {}
+  DDim dims() const;
+  DataType dtype() const;
+  void set_dims(const DDim& dims);
+  void set_dtype(DataType dtype);
+
+ private:
+  phi::DDim dims_;
+  phi::DataType dtype_{phi::DataType::FLOAT32};
+};
+}  // namespace phi