From 303a1beea639cc5920aceae724800de59c5bccf9 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Tue, 26 Jan 2010 21:16:06 +0000
Subject: [PATCH] Emit DW_AT_containing_type attribute for a class if
 containing type is known.

llvm-svn: 94587
---
 llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 532a68f5eaaf..0bc7f3286663 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -949,6 +949,11 @@ void DwarfDebug::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
     if (RLang)
       addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
               dwarf::DW_FORM_data1, RLang);
+
+    DICompositeType ContainingType = CTy.getContainingType();
+    if (!ContainingType.isNull())
+      addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, 
+                  getOrCreateTypeDIE(DIType(ContainingType.getNode())));
     break;
   }
   default: