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

[Bill Wendling]

Yeah. I was going to optimize it later. But got a bit lazy.

-bw

On Nov 25, 2008, at 1:00 AM, Duncan Sands <baldrick at free.fr> wrote:

> 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.