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Don't crash if computing a mapping to a node with zero size

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20595 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-03-15 04:40:24 +00:00
parent b0f92e3ed3
commit 841957ebaf
1 changed files with 2 additions and 0 deletions
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2
lib/Analysis/DataStructure/DataStructure.cpp
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@ -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);