Revert r97917, which was causing Clang Debug self-host failures.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97932 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DIE.h b/lib/CodeGen/AsmPrinter/DIE.h
index 21f5d62..af90289 100644
--- a/lib/CodeGen/AsmPrinter/DIE.h
+++ b/lib/CodeGen/AsmPrinter/DIE.h
@@ -112,6 +112,7 @@
   //===--------------------------------------------------------------------===//
   /// DIE - A structured debug information entry.  Has an abbreviation which
   /// describes it's organization.
+  class CompileUnit;
   class DIEValue;
 
   class DIE {
@@ -158,6 +159,7 @@
     void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
     void setOffset(unsigned O) { Offset = O; }
     void setSize(unsigned S) { Size = S; }
+    void setParent(DIE *P) { Parent = P; }
     
     /// addValue - Add a value and attributes to a DIE.
     ///
@@ -183,7 +185,7 @@
       }
       Abbrev.setChildrenFlag(dwarf::DW_CHILDREN_yes);
       Children.push_back(Child);
-      Child->Parent = this;
+      Child->setParent(this);
     }
 
 #ifndef NDEBUG