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Support for expanding ADDE and SUBE.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43175 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2007-10-19 13:06:17 +00:00
parent 5d868b1ffe
commit c8ca2365e5
1 changed files with 22 additions and 0 deletions
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22
lib/CodeGen/SelectionDAG/LegalizeDAGTypes.cpp
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@ -153,6 +153,7 @@ private:
void ExpandResult_BSWAP (SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_ADDSUB (SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_ADDSUBC (SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_ADDSUBE (SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_SELECT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_SELECT_CC (SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_MUL (SDNode *N, SDOperand &Lo, SDOperand &Hi);
@ -653,6 +654,8 @@ void DAGTypeLegalizer::ExpandResult(SDNode *N, unsigned ResNo) {
case ISD::SUB: ExpandResult_ADDSUB(N, Lo, Hi); break;
case ISD::ADDC:
case ISD::SUBC: ExpandResult_ADDSUBC(N, Lo, Hi); break;
case ISD::ADDE:
case ISD::SUBE: ExpandResult_ADDSUBE(N, Lo, Hi); break;
case ISD::SELECT: ExpandResult_SELECT(N, Lo, Hi); break;
case ISD::SELECT_CC: ExpandResult_SELECT_CC(N, Lo, Hi); break;
case ISD::MUL: ExpandResult_MUL(N, Lo, Hi); break;
@ -907,6 +910,25 @@ void DAGTypeLegalizer::ExpandResult_ADDSUBC(SDNode *N,
ReplaceLegalValueWith(SDOperand(N, 1), Hi.getValue(1));
}
void DAGTypeLegalizer::ExpandResult_ADDSUBE(SDNode *N,
SDOperand &Lo, SDOperand &Hi) {
// Expand the subcomponents.
SDOperand LHSL, LHSH, RHSL, RHSH;
GetExpandedOp(N->getOperand(0), LHSL, LHSH);
GetExpandedOp(N->getOperand(1), RHSL, RHSH);
SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Flag);
SDOperand LoOps[3] = { LHSL, RHSL, N->getOperand(2) };
SDOperand HiOps[3] = { LHSH, RHSH };
Lo = DAG.getNode(N->getOpcode(), VTList, LoOps, 3);
HiOps[2] = Lo.getValue(1);
Hi = DAG.getNode(N->getOpcode(), VTList, HiOps, 3);
// Legalized the flag result - switch anything that used the old flag to
// use the new one.
ReplaceLegalValueWith(SDOperand(N, 1), Hi.getValue(1));
}
void DAGTypeLegalizer::ExpandResult_MUL(SDNode *N,
SDOperand &Lo, SDOperand &Hi) {
MVT::ValueType VT = N->getValueType(0);