[DebugInfo] Construct nested types on behalf of owner CU

Differential revision: https://reviews.llvm.org/D58786

llvm-svn: 355303
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
index 2278bb0..427de49 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
@@ -236,6 +236,9 @@
   void applySubprogramAttributes(const DISubprogram *SP, DIE &SPDie,
                                  bool SkipSPAttributes = false);
 
+  /// Creates type DIE with specific context.
+  DIE *createTypeDIE(const DIScope *Context, DIE &ContextDIE, const DIType *Ty);
+
   /// Find existing DIE or create new DIE for the given type.
   DIE *getOrCreateTypeDIE(const MDNode *TyNode);