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Don't crash when encountering a BasicBlock that hasn't been registered yet.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35756 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2007-04-08 01:02:12 +00:00
parent 0cd3a23d2a
commit 51bc779096
1 changed files with 3 additions and 2 deletions
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5
lib/VMCore/Dominators.cpp
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@ -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;