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...Option 2) ------------- Add separate classes to the hierarchy for each intrinsic. There are a few different ways that this could be organized (note: UA* = unordered-atomic version of intrinsic, to save typing): a) Completely disjoint hierarchy UAMemIntrinsic * UAMemSetInst * UAMemTransferInst ** UAMemCpyInst ** UAMemMoveInst MemIntrinsic * MemSetInst * MemTransferInst ** MemCpyInst ** MemMoveInst This organization has the benefit of not interacting/interfering with the regular memory intrinsics in any way. That’s also a big downside; most/many passes are going to be able to function on unordered-a...

...Option 2) ------------- Add separate classes to the hierarchy for each intrinsic. There are a few different ways that this could be organized (note: UA* = unordered-atomic version of intrinsic, to save typing): a) Completely disjoint hierarchy UAMemIntrinsic * UAMemSetInst * UAMemTransferInst ** UAMemCpyInst ** UAMemMoveInst MemIntrinsic * MemSetInst * MemTransferInst ** MemCpyInst ** MemMoveInst e) Multiple inheritance This is a variant on options 2b to 2d. To make it possible to easily use isa<> to query for whether or not a memory intrinsic is unordered-atomic or not we could add an interfac...