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17e08f50b9
Summary: Teach `isHighCostExpansion` to consider divisions by power-of-two constants as cheap and add a test case. This change is needed for a new user of `isHighCostExpansion` that will be added in a subsequent change. Depends on D8995. Reviewers: atrick Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D8993 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234845 91177308-0d34-0410-b5e6-96231b3b80d8
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