Since LCSSA switched over to DenseMap, we have to be more careful to avoid iterator invalidation.  Fixes PR2385.
Since LCSSA switched over to DenseMap, we have to be more careful to avoid iterator invalidation.  Fixes PR2385.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@51777 91177308-0d34-0410-b5e6-96231b3b80d8

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