Hal Finkel 35564dc3ae Minor changes from review.
As suggested by Nick Lewycky, the tree traversal queues have been changed to SmallVectors and the associated loops have been rotated. Also, an 80-col violation was fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149607 91177308-0d34-0410-b5e6-96231b3b80d8
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