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diff --git a/lib/Target/R600/AMDILSIDevice.h b/lib/Target/R600/AMDILSIDevice.h
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+++ b/lib/Target/R600/AMDILSIDevice.h
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+//===------- AMDILSIDevice.h - Define SI Device for AMDIL -*- C++ -*------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//==-----------------------------------------------------------------------===//
+//
+/// \file
+/// \brief Interface for the subtarget data classes.
+///
+/// This file will define the interface that each generation needs to
+/// implement in order to correctly answer queries on the capabilities of the
+/// specific hardware.
+//===---------------------------------------------------------------------===//
+#ifndef AMDILSIDEVICE_H
+#define AMDILSIDEVICE_H
+#include "AMDILEvergreenDevice.h"
+
+namespace llvm {
+class AMDGPUSubtarget;
+//===---------------------------------------------------------------------===//
+// SI generation of devices and their respective sub classes
+//===---------------------------------------------------------------------===//
+
+/// \brief The AMDGPUSIDevice is the base class for all Southern Island series
+/// of cards.
+class AMDGPUSIDevice : public AMDGPUEvergreenDevice {
+public:
+  AMDGPUSIDevice(AMDGPUSubtarget*);
+  virtual ~AMDGPUSIDevice();
+  virtual size_t getMaxLDSSize() const;
+  virtual uint32_t getGeneration() const;
+  virtual std::string getDataLayout() const;
+};
+
+} // namespace llvm
+#endif // AMDILSIDEVICE_H