Add iterator support to DWARFDie to allow child DIE iteration.

Differential Revision: https://reviews.llvm.org/D28303

llvm-svn: 291194
diff --git a/llvm/unittests/DebugInfo/DWARF/DwarfGenerator.cpp b/llvm/unittests/DebugInfo/DWARF/DwarfGenerator.cpp
index 9a72f70..9ec43ca 100644
--- a/llvm/unittests/DebugInfo/DWARF/DwarfGenerator.cpp
+++ b/llvm/unittests/DebugInfo/DWARF/DwarfGenerator.cpp
@@ -108,6 +108,10 @@
   return dwarfgen::DIE(this, &DU.getUnitDie());
 }
 
+void dwarfgen::DIE::setForceChildren() {
+  Die->setForceChildren(true);
+}
+
 //===----------------------------------------------------------------------===//
 /// dwarfgen::Generator implementation.
 //===----------------------------------------------------------------------===//