chore: import upstream snapshot with attribution

paddle/phi/kernels/reshape_kernel.h

@@ -0,0 +1,66 @@
+/* Copyright (c) 2021 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/phi/common/int_array.h"
+#include "paddle/phi/core/dense_tensor.h"
+#include "paddle/phi/infermeta/unary.h"
+#include "paddle/phi/kernels/empty_kernel.h"
+
+namespace phi {
+
+template <typename Context>
+void ReshapeKernel(const Context& dev_ctx,
+                   const DenseTensor& x,
+                   const IntArray& shape,
+                   DenseTensor* out);
+
+// FIXME(dev): Need to deprecate this kernel while
+// cleaning old IR system.
+template <typename Context>
+void ReshapeWithXShapeKernel(const Context& dev_ctx,
+                             const DenseTensor& x,
+                             const IntArray& shape,
+                             DenseTensor* out,
+                             DenseTensor* xshape);
+
+template <typename Context>
+void ReshapeStridedKernel(const Context& dev_ctx,
+                          const DenseTensor& x,
+                          const IntArray& shape,
+                          DenseTensor* out);
+
+template <typename T, typename Context>
+void Reshape(const Context& dev_ctx,
+             const DenseTensor& x,
+             const std::vector<int64_t>& shape,
+             DenseTensor* out) {
+  MetaTensor meta_out(out);
+  InferMetaFromVecValue(x, shape, &meta_out);
+  if (x.initialized()) {
+    ReshapeKernel<Context>(dev_ctx, x, IntArray(shape), out);
+  }
+}
+
+template <typename T, typename Context>
+DenseTensor Reshape(const Context& dev_ctx,
+                    const DenseTensor& x,
+                    const std::vector<int64_t>& shape) {
+  DenseTensor dense_out;
+  Reshape<T, Context>(dev_ctx, x, shape, &dense_out);
+  return dense_out;
+}
+
+}  // namespace phi