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diff --git a/tensorflow/compiler/xla/service/gpu/llvm_gpu_backend/nvptx_backend_lib.h b/tensorflow/compiler/xla/service/gpu/llvm_gpu_backend/nvptx_backend_lib.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.
+==============================================================================*/
+
+// LLVM-based compiler backend.
+#ifndef TENSORFLOW_COMPILER_XLA_SERVICE_GPU_LLVM_GPU_BACKEND_NVPTX_BACKEND_LIB_H_
+#define TENSORFLOW_COMPILER_XLA_SERVICE_GPU_LLVM_GPU_BACKEND_NVPTX_BACKEND_LIB_H_
+
+#include <string>
+#include <utility>
+
+#include "llvm/IR/Module.h"
+#include "tensorflow/compiler/xla/service/hlo_module_config.h"
+#include "tensorflow/compiler/xla/statusor.h"
+#include "tensorflow/compiler/xla/types.h"
+#include "tensorflow/core/lib/core/stringpiece.h"
+
+namespace xla {
+namespace gpu {
+
+// Compiles the argument module and returns it. libdevice_dir_path is the parent
+// directory of the libdevice bitcode libraries. The contents of the module may
+// be changed.
+//
+// The Compile.* interfaces each create their own llvm::LLVMContext objects for
+// thread safety, but note that LLVM's multithreaded support is very
+// preliminary; multithreaded use is not recommended at this time.
+StatusOr<string> CompileToPtx(llvm::Module* module,
+                              std::pair<int, int> compute_capability,
+                              const HloModuleConfig& hlo_module_config,
+                              const string& libdevice_dir_path);
+
+}  // namespace gpu
+}  // namespace xla
+
+#endif  // TENSORFLOW_COMPILER_XLA_SERVICE_GPU_LLVM_GPU_BACKEND_NVPTX_BACKEND_LIB_H_