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ScalarEvolution: Construct SCEVDivision's Derived type instead of itself
SCEVDivision::divide constructed an object of SCEVDivision<Derived> instead of Derived. divide would call visit which would cast the SCEVDivision<Derived> to type Derived. As it happens, SCEVDivision<Derived> and Derived currently have the same layout but this is fragile and grounds for UB. Instead, just construct Derived. No functional change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222126 91177308-0d34-0410-b5e6-96231b3b80d8
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