[polly] r233505 - Avoid nullptr dereference in the ScopGraphPrinter

[Tobias Grosser]

Author: grosser
Date: Sun Mar 29 17:00:54 2015
New Revision: 233505

URL: http://llvm.org/viewvc/llvm-project?rev=233505&view=rev
Log:
Avoid nullptr dereference in the ScopGraphPrinter

Reported-by: http://buildd-clang.debian.net/scan-build

Modified:
    polly/trunk/lib/Analysis/ScopGraphPrinter.cpp

Modified: polly/trunk/lib/Analysis/ScopGraphPrinter.cpp
URL: http://llvm.org/viewvc/llvm-project/polly/trunk/lib/Analysis/ScopGraphPrinter.cpp?rev=233505&r1=233504&r2=233505&view=diff
==============================================================================
--- polly/trunk/lib/Analysis/ScopGraphPrinter.cpp (original)
+++ polly/trunk/lib/Analysis/ScopGraphPrinter.cpp Sun Mar 29 17:00:54 2015
@@ -83,7 +83,7 @@ struct DOTGraphTraits<ScopDetection *> :
       else
         break;
 
-    if (R->getEntry() == destBB && R->contains(srcBB))
+    if (R && R->getEntry() == destBB && R->contains(srcBB))
       return "constraint=false";
 
     return "";