From: Nick Lewycky <nicholas@mxc.ca>
Date: Sun, 8 Apr 2007 01:02:12 +0000 (+0000)
Subject: Don't crash when encountering a BasicBlock that hasn't been registered yet.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=51bc779096f88ef52a12eaf07d6d1df5266007ca;p=oota-llvm.git

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
---

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;