[llvm-commits] [llvm] r60014 - /llvm/trunk/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

[Duncan Sands]

Hi Bill,

> +      SDValue LHSPos = DAG.getSetCC(OType, LHS, Zero, ISD::SETGE);
> +      SDValue RHSPos = DAG.getSetCC(OType, RHS, Zero, ISD::SETGE);
> +      SDValue And1 = DAG.getNode(ISD::AND, OType, LHSPos, RHSPos);

can't you just do: overflowed = (LHSPos == RHSPos) && (LHSPos != SumPos)?
(Positive means >= 0).

Ciao,

Duncan.