From 8f6a281e979df1578526fc8a72a3c1bd33aa3efa Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Thu, 28 Oct 2010 20:08:13 +0000
Subject: [PATCH] Backward compatibility. Gracefully handle older versions of
 debug info.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117595 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Analysis/DebugInfo.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/llvm/Analysis/DebugInfo.h b/include/llvm/Analysis/DebugInfo.h
index 41d8e14aaed..54508a77b13 100644
--- a/include/llvm/Analysis/DebugInfo.h
+++ b/include/llvm/Analysis/DebugInfo.h
@@ -272,10 +272,16 @@ namespace llvm {
       return DbgNode && (isBasicType() || isDerivedType() || isCompositeType());
     }
     StringRef getDirectory() const  { 
+      if (getVersion() == llvm::LLVMDebugVersion7)
+        return getCompileUnit().getDirectory();
+
       DIFile F = getFieldAs<DIFile>(3);
       return F.getDirectory();
     }
     StringRef getFilename() const  { 
+      if (getVersion() == llvm::LLVMDebugVersion7)
+        return getCompileUnit().getFilename();
+
       DIFile F = getFieldAs<DIFile>(3);
       return F.getFilename();
     }