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-rw-r--r--lib/Analysis/DataStructure/DataStructure.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Analysis/DataStructure/DataStructure.cpp b/lib/Analysis/DataStructure/DataStructure.cpp
index a73a942fc7..a94e083da3 100644
--- a/lib/Analysis/DataStructure/DataStructure.cpp
+++ b/lib/Analysis/DataStructure/DataStructure.cpp
@@ -2075,6 +2075,8 @@ void DSGraph::computeNodeMapping(const DSNodeHandle &NH1,
// mapping the edges together now.
int N2Idx = NH2.getOffset()-NH1.getOffset();
unsigned N2Size = N2->getSize();
+ if (N2Size == 0) return; // No edges to map to.
+
for (unsigned i = 0, e = N1->getSize(); i < e; i += DS::PointerSize)
if (unsigned(N2Idx)+i < N2Size)
computeNodeMapping(N1->getLink(i), N2->getLink(N2Idx+i), NodeMap);