[PATCH 2/3] SelectionDAG: Don't do libcall on div/rem if divrem is custom

[Jan Vesely]

ping

On Thu, 2014-10-16 at 12:25 -0400, Jan Vesely wrote:
> CC: Owen Anderson <resistor at mac.com>
> Signed-off-by: Jan Vesely <jan.vesely at rutgers.edu>
> ---
>  lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp | 29 +++++++++++++++++++++++
>  1 file changed, 29 insertions(+)
> 
> diff --git a/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
> index 3e5f7dd..e0dc2bd 100644
> --- a/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
> +++ b/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
> @@ -2101,6 +2101,13 @@ void DAGTypeLegalizer::ExpandIntRes_SDIV(SDNode *N,
>    EVT VT = N->getValueType(0);
>    SDLoc dl(N);
>  
> +  if (TLI.getOperationAction(ISD::SDIVREM, VT) == TargetLoweringBase::Custom) {
> +    SDValue RES = DAG.getNode(ISD::SDIVREM, dl, DAG.getVTList(VT, VT),
> +                              N->getOperand(0), N->getOperand(1));
> +    SplitInteger(RES, Lo, Hi);
> +    return;
> +  }
> +
>    RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
>    if (VT == MVT::i16)
>      LC = RTLIB::SDIV_I16;
> @@ -2280,6 +2287,13 @@ void DAGTypeLegalizer::ExpandIntRes_SREM(SDNode *N,
>    EVT VT = N->getValueType(0);
>    SDLoc dl(N);
>  
> +  if (TLI.getOperationAction(ISD::SDIVREM, VT) == TargetLoweringBase::Custom) {
> +    SDValue RES = DAG.getNode(ISD::SDIVREM, dl, DAG.getVTList(VT, VT),
> +                              N->getOperand(0), N->getOperand(1));
> +    SplitInteger(RES.getValue(1), Lo, Hi);
> +    return;
> +  }
> +
>    RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
>    if (VT == MVT::i16)
>      LC = RTLIB::SREM_I16;
> @@ -2420,6 +2434,13 @@ void DAGTypeLegalizer::ExpandIntRes_UDIV(SDNode *N,
>    EVT VT = N->getValueType(0);
>    SDLoc dl(N);
>  
> +  if (TLI.getOperationAction(ISD::UDIVREM, VT) == TargetLoweringBase::Custom) {
> +    SDValue RES = DAG.getNode(ISD::UDIVREM, dl, DAG.getVTList(VT, VT),
> +                              N->getOperand(0), N->getOperand(1));
> +    SplitInteger(RES, Lo, Hi);
> +    return;
> +  }
> +
>    RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
>    if (VT == MVT::i16)
>      LC = RTLIB::UDIV_I16;
> @@ -2440,6 +2461,14 @@ void DAGTypeLegalizer::ExpandIntRes_UREM(SDNode *N,
>    EVT VT = N->getValueType(0);
>    SDLoc dl(N);
>  
> +  if (TLI.getOperationAction(ISD::UDIVREM, VT) == TargetLoweringBase::Custom) {
> +    SDValue RES = DAG.getNode(ISD::UDIVREM, dl, DAG.getVTList(VT, VT),
> +                              N->getOperand(0), N->getOperand(1));
> +    SplitInteger(RES.getValue(1), Lo, Hi);
> +    return;
> +  }
> +
> +
>    RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
>    if (VT == MVT::i16)
>      LC = RTLIB::UREM_I16;

-- 
Jan Vesely <jan.vesely at rutgers.edu>
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