From 51bc779096f88ef52a12eaf07d6d1df5266007ca Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Sun, 8 Apr 2007 01:02:12 +0000
Subject: [PATCH] Don't crash when encountering a BasicBlock that hasn't been
 registered yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35756 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/VMCore/Dominators.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/VMCore/Dominators.cpp b/lib/VMCore/Dominators.cpp
index 9bd51bf4d91..b3e18e8e3ef 100644
--- a/lib/VMCore/Dominators.cpp
+++ b/lib/VMCore/Dominators.cpp
@@ -935,8 +935,9 @@ void ETForestBase::updateDFSNumbers()
     for (df_iterator<BasicBlock*> I = df_begin(Roots[i]),
            E = df_end(Roots[i]); I != E; ++I) {
       BasicBlock *BB = *I;
-      if (!getNode(BB)->hasFather())
-        getNode(BB)->assignDFSNumber(dfsnum);    
+      ETNode *ETN = getNode(BB);
+      if (ETN && !ETN->hasFather())
+        ETN->assignDFSNumber(dfsnum);    
   }
   SlowQueries = 0;
   DFSInfoValid = true;
-- 
2.34.1