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diff --git a/tensorflow/compiler/xla/service/gpu/sequential_thunk.h b/tensorflow/compiler/xla/service/gpu/sequential_thunk.h
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+/* Copyright 2017 The TensorFlow 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.
+==============================================================================*/
+
+#ifndef TENSORFLOW_COMPILER_XLA_SERVICE_GPU_SEQUENTIAL_THUNK_H_
+#define TENSORFLOW_COMPILER_XLA_SERVICE_GPU_SEQUENTIAL_THUNK_H_
+
+#include <vector>
+
+#include "tensorflow/compiler/xla/service/gpu/buffer_allocations.h"
+#include "tensorflow/compiler/xla/service/gpu/thunk.h"
+#include "tensorflow/compiler/xla/service/hlo_instruction.h"
+#include "tensorflow/core/platform/stream_executor_no_cuda.h"
+
+namespace xla {
+namespace gpu {
+
+// A thunk that wraps a list of sub-thunks. Executing this thunk executes all
+// the sub-thunks sequentially. This is useful to implement instructions that
+// require multiple kernel launches or library calls.
+class SequentialThunk : public Thunk {
+ public:
+  SequentialThunk(std::vector<std::unique_ptr<Thunk>>&& thunks,
+                  const HloInstruction* hlo);
+  SequentialThunk(const SequentialThunk&) = delete;
+  SequentialThunk& operator=(const SequentialThunk&) = delete;
+
+  const std::vector<std::unique_ptr<Thunk>>& thunks() const { return thunks_; }
+
+  tensorflow::Status Initialize(const GpuExecutable& executable) override;
+  tensorflow::Status ExecuteOnStream(
+      const BufferAllocations& buffer_allocations,
+      perftools::gputools::Stream* stream) override;
+
+ private:
+  // The list of sub-thunks.
+  std::vector<std::unique_ptr<Thunk>> thunks_;
+};
+
+}  // namespace gpu
+}  // namespace xla
+
+#endif  // TENSORFLOW_COMPILER_XLA_SERVICE_GPU_SEQUENTIAL_THUNK_H_