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Dear all, a couple of new generic DAG nodes ISD::ADCARRY and ISD::SUBCARRY were recently introduced in https://reviews.llvm.org/D29872 These nodes have three inputs and two outputs, the second output being the "carry". I understand that carry is well defined for ADDCARRY but my question is about SUBCARRY. Some architectures set the "carry" of a "x - y" subtraction