Let dwarf writer allocate extra space in the debug location expression. This space, if requested, will be used for complex addresses of the Blocks' variables.

llvm-svn: 130178
diff --git a/llvm/lib/Target/ARM/ARMAsmPrinter.h b/llvm/lib/Target/ARM/ARMAsmPrinter.h
index 5f9169e..e949014 100644
--- a/llvm/lib/Target/ARM/ARMAsmPrinter.h
+++ b/llvm/lib/Target/ARM/ARMAsmPrinter.h
@@ -90,7 +90,8 @@
   MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
 
   /// EmitDwarfRegOp - Emit dwarf register operation.
-  virtual void EmitDwarfRegOp(const MachineLocation &MLoc) const;
+  virtual void EmitDwarfRegOp(const MachineLocation &MLoc,
+                              unsigned ExtraExprSize = 0) const;
 
   virtual unsigned getISAEncoding() {
     // ARM/Darwin adds ISA to the DWARF info for each function.