Benjamin Kramer 318b7cc7f1 Use move semantics if possible to construct ConstantRanges.
Arithmetic on ConstantRanges creates a lot of large temporary APInts that
benefit from move semantics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186091 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-11 15:37:27 +00:00
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