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diff --git a/include/llvm/CodeGen/MIRPrinter.h b/include/llvm/CodeGen/MIRPrinter.h
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+++ b/include/llvm/CodeGen/MIRPrinter.h
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+//===- MIRPrinter.h - MIR serialization format printer --------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the functions that print out the LLVM IR and the machine
+// functions using the MIR serialization format.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_CODEGEN_MIRPRINTER_H
+#define LLVM_LIB_CODEGEN_MIRPRINTER_H
+
+namespace llvm {
+
+class MachineBasicBlock;
+class MachineFunction;
+class Module;
+class raw_ostream;
+template <typename T> class SmallVectorImpl;
+
+/// Print LLVM IR using the MIR serialization format to the given output stream.
+void printMIR(raw_ostream &OS, const Module &M);
+
+/// Print a machine function using the MIR serialization format to the given
+/// output stream.
+void printMIR(raw_ostream &OS, const MachineFunction &MF);
+
+/// Determine a possible list of successors of a basic block based on the
+/// basic block machine operand being used inside the block. This should give
+/// you the correct list of successor blocks in most cases except for things
+/// like jump tables where the basic block references can't easily be found.
+/// The MIRPRinter will skip printing successors if they match the result of
+/// this funciton and the parser will use this function to construct a list if
+/// it is missing.
+void guessSuccessors(const MachineBasicBlock &MBB,
+                     SmallVectorImpl<MachineBasicBlock*> &Successors,
+                     bool &IsFallthrough);
+
+} // end namespace llvm
+
+#endif