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fix PR4915, a crash in -debug mode.

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llvm-svn: 81177
This commit is contained in:
Chris Lattner 2009-09-08 01:22:54 +00:00
parent ee1d1d3173
commit fb09f6e5ea
1 changed files with 3 additions and 1 deletions
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4
include/llvm/Analysis/Dominators.h
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@ -548,7 +548,9 @@ public:
o << "DFSNumbers invalid: " << SlowQueries << " slow queries.";
o << "\n";
PrintDomTree<NodeT>(getRootNode(), o, 1);
// The postdom tree can have a null root if there are no returns.
if (getRootNode())
PrintDomTree<NodeT>(getRootNode(), o, 1);
}
protected: