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of using a Location class with the same information. When making a copy of a MachineOperand that was already stored in a MachineInstr, it is necessary to clear the parent pointer on the copy. Otherwise the register use-def lists become inconsistent. Add MachineOperand::clearParent() to do that. An alternative would be a custom MachineOperand copy constructor that cleared ParentMI. I didn't want to do that because of the performance impact. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123109 91177308-0d34-0410-b5e6-96231b3b80d8
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