Enable Dwarf debugging info.

llvm-svn: 26581
diff --git a/llvm/lib/Target/X86/X86AsmPrinter.cpp b/llvm/lib/Target/X86/X86AsmPrinter.cpp
index bd96cb9..edc2397 100644
--- a/llvm/lib/Target/X86/X86AsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86AsmPrinter.cpp
@@ -75,6 +75,9 @@
   default: break;
   }
   
+  // Emit initial debug information.
+  DW.BeginModule(M);
+
   return AsmPrinter::doInitialization(M);
 }
 
@@ -187,6 +190,9 @@
     }
   }
 
+  // Emit initial debug information.
+  DW.EndModule(M);
+
   AsmPrinter::doFinalization(M);
   return false; // success
 }