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It helps a lot when you check for the end of your list before randomly
dereferencing things. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42605 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -538,7 +538,8 @@ public:
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// We may have hit the beginning of our SparseBitVector, in which case,
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// we may need to insert right after this element, which requires moving
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// the current iterator forward one, because insert does insert before.
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if (ElementIter->index() < ElementIndex)
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if (ElementIter != Elements.end() &&
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ElementIter->index() < ElementIndex)
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ElementIter = Elements.insert(++ElementIter, Element);
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else
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ElementIter = Elements.insert(ElementIter, Element);
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