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< ListIt addInst(DynInstPtr &inst);
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> ListIt addInst(const DynInstPtr &inst);
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< void instDone(ThreadID tid, DynInstPtr &inst);
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> void instDone(ThreadID tid, const DynInstPtr &inst);
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< void removeFrontInst(DynInstPtr &inst);
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> void removeFrontInst(const DynInstPtr &inst);