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Reinstate revisions r234755, r234759, r234760

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changes:
  Don't apply on hexagon and NVPTX since they no longer claim to support UADDO/USUBO
  Add location to getConstant
  Drop comment about the ops being turned into expand

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236240 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jan Vesely
2015-04-30 17:15:56 +00:00
parent 4887adf190
commit e3d17d7e9c
12 changed files with 166 additions and 12 deletions
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32
lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
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@ -1644,6 +1644,38 @@ void DAGTypeLegalizer::ExpandIntRes_ADDSUB(SDNode *N,
return;
}
bool hasOVF =
TLI.isOperationLegalOrCustom(N->getOpcode() == ISD::ADD ?
ISD::UADDO : ISD::USUBO,
TLI.getTypeToExpandTo(*DAG.getContext(), NVT));
if (hasOVF) {
SDVTList VTList = DAG.getVTList(NVT, NVT);
TargetLoweringBase::BooleanContent BoolType = TLI.getBooleanContents(NVT);
int RevOpc;
if (N->getOpcode() == ISD::ADD) {
RevOpc = ISD::SUB;
Lo = DAG.getNode(ISD::UADDO, dl, VTList, LoOps);
Hi = DAG.getNode(ISD::ADD, dl, NVT, makeArrayRef(HiOps, 2));
} else {
RevOpc = ISD::ADD;
Lo = DAG.getNode(ISD::USUBO, dl, VTList, LoOps);
Hi = DAG.getNode(ISD::SUB, dl, NVT, makeArrayRef(HiOps, 2));
}
SDValue OVF = Lo.getValue(1);
switch (BoolType) {
case TargetLoweringBase::UndefinedBooleanContent:
OVF = DAG.getNode(ISD::AND, dl, NVT, DAG.getConstant(1, dl, NVT), OVF);
// Fallthrough
case TargetLoweringBase::ZeroOrOneBooleanContent:
Hi = DAG.getNode(N->getOpcode(), dl, NVT, Hi, OVF);
break;
case TargetLoweringBase::ZeroOrNegativeOneBooleanContent:
Hi = DAG.getNode(RevOpc, dl, NVT, Hi, OVF);
}
return;
}
if (N->getOpcode() == ISD::ADD) {
Lo = DAG.getNode(ISD::ADD, dl, NVT, LoOps);
Hi = DAG.getNode(ISD::ADD, dl, NVT, makeArrayRef(HiOps, 2));