Revert r130178. It turned out to be not the optimal path to emit complex location expressions.

llvm-svn: 130326
diff --git a/llvm/lib/Target/ARM/ARMAsmPrinter.h b/llvm/lib/Target/ARM/ARMAsmPrinter.h
index e949014..5f9169e 100644
--- a/llvm/lib/Target/ARM/ARMAsmPrinter.h
+++ b/llvm/lib/Target/ARM/ARMAsmPrinter.h
@@ -90,8 +90,7 @@
   MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
 
   /// EmitDwarfRegOp - Emit dwarf register operation.
-  virtual void EmitDwarfRegOp(const MachineLocation &MLoc,
-                              unsigned ExtraExprSize = 0) const;
+  virtual void EmitDwarfRegOp(const MachineLocation &MLoc) const;
 
   virtual unsigned getISAEncoding() {
     // ARM/Darwin adds ISA to the DWARF info for each function.