From 5e8e2d7ad9147f15898a5587fea053d05017a055 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Fri, 30 Oct 2009 22:52:47 +0000
Subject: [PATCH] If string field is empty then return NULL.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85630 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/DebugInfo.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/Analysis/DebugInfo.cpp b/lib/Analysis/DebugInfo.cpp
index 1d340b907a9..7bff11ec5b4 100644
--- a/lib/Analysis/DebugInfo.cpp
+++ b/lib/Analysis/DebugInfo.cpp
@@ -84,8 +84,11 @@ DIDescriptor::getStringField(unsigned Elt) const {
     return NULL;
 
   if (Elt < DbgNode->getNumElements())
-    if (MDString *MDS = dyn_cast_or_null<MDString>(DbgNode->getElement(Elt)))
+    if (MDString *MDS = dyn_cast_or_null<MDString>(DbgNode->getElement(Elt))) {
+      if (MDS->getLength() == 0)
+        return NULL;
       return MDS->getString().data();
+    }
 
   return NULL;
 }
-- 
2.34.1