diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h
index 1d42c323b9b..b16df5c2dae 100644
--- a/include/llvm/Target/TargetInstrInfo.h
+++ b/include/llvm/Target/TargetInstrInfo.h
@@ -21,7 +21,6 @@ namespace llvm {
 
 class MCAsmInfo;
 class TargetRegisterClass;
-class TargetRegisterInfo;
 class LiveVariables;
 class CalleeSavedInfo;
 class SDNode;
@@ -226,6 +225,14 @@ public:
   virtual bool findCommutedOpIndices(MachineInstr *MI, unsigned &SrcOpIdx1,
                                      unsigned &SrcOpIdx2) const = 0;
 
+  /// isIdentical - Return true if two instructions are identical. This differs
+  /// from MachineInstr::isIdenticalTo() in that it does not require the
+  /// virtual destination registers to be the same. This is used by MachineLICM
+  /// and other MI passes to perform CSE.
+  virtual bool isIdentical(const MachineInstr *MI,
+                           const MachineInstr *Other,
+                           const MachineRegisterInfo *MRI) const = 0;
+
   /// AnalyzeBranch - Analyze the branching code at the end of MBB, returning
   /// true if it cannot be understood (e.g. it's a switch dispatch or isn't
   /// implemented for a target).  Upon success, this returns false and returns
@@ -510,6 +517,10 @@ public:
                              MachineBasicBlock::iterator MI,
                              unsigned DestReg, unsigned SubReg,
                              const MachineInstr *Orig) const;
+  virtual bool isIdentical(const MachineInstr *MI,
+                           const MachineInstr *Other,
+                           const MachineRegisterInfo *MRI) const;
+
   virtual unsigned GetFunctionSizeInBytes(const MachineFunction &MF) const;
 };