1 files changed, 23 insertions, 0 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index bdcb813..1cfadc9 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2650,3 +2650,26 @@ void DwarfDebug::emitDebugStrDWO() {
 DIScope DwarfDebug::resolve(DIScopeRef SRef) const {
   return SRef.resolve(TypeIdentifierMap);
 }
+
+// If the current node has a parent scope then return that,
+// else return an empty scope.
+DIScope DwarfDebug::getScopeContext(DIScope S) const {
+
+  if (S.isType())
+    return DIType(S).getContext();
+
+  if (S.isSubprogram())
+    return DISubprogram(S).getContext();
+
+  if (S.isLexicalBlock())
+    return DILexicalBlock(S).getContext();
+
+  if (S.isLexicalBlockFile())
+    return DILexicalBlockFile(S).getContext();
+
+  if (S.isNameSpace())
+    return DINameSpace(S).getContext();
+
+  assert((S.isFile() || S.isCompileUnit()) && "Unhandled type of scope.");
+  return DIScope();
+}