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diff --git a/include/llvm/MC/MCDisassembler.h b/include/llvm/MC/MCDisassembler.h
new file mode 100644
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+++ b/include/llvm/MC/MCDisassembler.h
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+//===-- llvm/MC/MCDisassembler.h - Disassembler interface -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#ifndef MCDISASSEMBLER_H
+#define MCDISASSEMBLER_H
+
+#include "llvm/Support/DataTypes.h"
+
+namespace llvm {
+  
+class MCInst;
+class MemoryObject;
+class raw_ostream;
+
+/// MCDisassembler - Superclass for all disassemblers.  Consumes a memory region
+///   and provides an array of assembly instructions.
+class MCDisassembler {
+public:
+  /// Constructor     - Performs initial setup for the disassembler.
+  MCDisassembler() {}
+  
+  virtual ~MCDisassembler();
+  
+  /// getInstruction  - Returns the disassembly of a single instruction.
+  ///
+  /// @param instr    - An MCInst to populate with the contents of the 
+  ///                   instruction.
+  /// @param size     - A value to populate with the size of the instruction, or
+  ///                   the number of bytes consumed while attempting to decode
+  ///                   an invalid instruction.
+  /// @param region   - The memory object to use as a source for machine code.
+  /// @param address  - The address, in the memory space of region, of the first
+  ///                   byte of the instruction.
+  /// @param vStream  - The stream to print warnings and diagnostic messages on.
+  /// @return         - True if the instruction is valid; false otherwise.
+  virtual bool          getInstruction(MCInst& instr,
+                                       uint64_t& size,
+                                       const MemoryObject &region,
+                                       uint64_t address,
+                                       raw_ostream &vStream) const = 0;
+};  
+
+} // namespace llvm
+
+#endif