Index: include/llvm/Target/TargetInstrInfo.h
===================================================================
--- include/llvm/Target/TargetInstrInfo.h
+++ include/llvm/Target/TargetInstrInfo.h
@@ -250,6 +250,11 @@
                                  unsigned &Size, unsigned &Offset,
                                  const MachineFunction &MF) const;
 
+  /// Returns the size of the specified MachineInstr. 
+  virtual unsigned GetInstSizeInBytes(const MachineInstr &MI) const {
+    llvm_unreachable("Target didn't implement TargetInstrInfo::GetInstSizeInBytes!");
+  }
+
   /// Return true if the instruction is as cheap as a move instruction.
   ///
   /// Targets for different archs need to override this, and different