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234c5890e7
This is part of the work to devirtualize Value. The old pattern was to call replaceUsesOfWithOnConstant which was overridden by subclasses. Those could then call replaceUsesOfWithOnConstantImpl on Constant to handle deleting the current value. To be consistent with other parts of the code, this has been changed so that we call the method on Constant, and that dispatches to an Impl on subclasses. As part of this, it made sense to rename the methods to be more descriptive. The new name is Constant::handleOperandChange, and it requires that all subclasses of Constant implement handleOperandChangeImpl, even if they just throw an error if they shouldn't be called. Reviewed by Duncan Exon Smith. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240567 91177308-0d34-0410-b5e6-96231b3b80d8