2c7610cc43
- The direct use case (in [1]) is to add `llvm::IntervalMap` [2] and the allocator required by IntervalMap ctor [3] to class `InstrProfSymtab` as owned members. The allocator class doesn't have a move-assignment operator; and it's going to take much effort to implement move-assignment operator for the allocator class such that the enclosing class is movable. - There is only one use of compiler-generated move-assignment operator in the repo, which is in CoverageMappingReader.cpp. Luckily it's possible to use std::unique_ptr<InstrProfSymtab> instead, so did the change. [1] https://github.com/llvm/llvm-project/pull/66825 [2]4c2f68840e/llvm/include/llvm/ADT/IntervalMap.h (L936)[3]4c2f68840e/llvm/include/llvm/ADT/IntervalMap.h (L1041)