From 7cc6dcf6e00928db982747ce467f8c89a4d6c73e Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Wed, 18 Apr 2007 00:53:01 +0000
Subject: [PATCH] Fix
 http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070416/047971.html

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36236 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/PostDominators.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Analysis/PostDominators.cpp b/lib/Analysis/PostDominators.cpp
index f93190c6861..b239596163f 100644
--- a/lib/Analysis/PostDominators.cpp
+++ b/lib/Analysis/PostDominators.cpp
@@ -284,7 +284,7 @@ PostDominanceFrontier::calculate(const PostDominatorTree &DT,
     for (pred_iterator SI = pred_begin(BB), SE = pred_end(BB);
          SI != SE; ++SI)
       // Does Node immediately dominate this predecessor?
-      if (DT[*SI]->getIDom() != Node)
+      if (DT[*SI] && DT[*SI]->getIDom() != Node)
         S.insert(*SI);
 
   // At this point, S is DFlocal.  Now we union in DFup's of our children...