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Implement a few new operations. 

llvm-svn: 43171
This commit is contained in:
Chris Lattner 2007-10-19 04:46:45 +00:00
parent e31365eecc
commit e5a6448533
1 changed files with 35 additions and 0 deletions
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35
llvm/lib/CodeGen/SelectionDAG/LegalizeDAGTypes.cpp
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@ -146,9 +146,11 @@ private:
void ExpandResult_ZERO_EXTEND(SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_SIGN_EXTEND(SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_BIT_CONVERT(SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_SIGN_EXTEND_INREG(SDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_LOAD (LoadSDNode *N, SDOperand &Lo, SDOperand &Hi);
void ExpandResult_Logical (SDNode *N, SDOperand &Lo, SDOperand &Hi);
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_SELECT (SDNode *N, SDOperand &Lo, SDOperand &Hi);
@ -177,6 +179,7 @@ private:
// Operand Expansion.
bool ExpandOperand(SDNode *N, unsigned OperandNo);
SDOperand ExpandOperand_TRUNCATE(SDNode *N);
SDOperand ExpandOperand_BIT_CONVERT(SDNode *N);
SDOperand ExpandOperand_UINT_TO_FP(SDOperand Source, MVT::ValueType DestTy);
SDOperand ExpandOperand_SINT_TO_FP(SDOperand Source, MVT::ValueType DestTy);
SDOperand ExpandOperand_EXTRACT_ELEMENT(SDNode *N);
@ -639,11 +642,13 @@ void DAGTypeLegalizer::ExpandResult(SDNode *N, unsigned ResNo) {
case ISD::ZERO_EXTEND: ExpandResult_ZERO_EXTEND(N, Lo, Hi); break;
case ISD::SIGN_EXTEND: ExpandResult_SIGN_EXTEND(N, Lo, Hi); break;
case ISD::BIT_CONVERT: ExpandResult_BIT_CONVERT(N, Lo, Hi); break;
case ISD::SIGN_EXTEND_INREG: ExpandResult_SIGN_EXTEND_INREG(N, Lo, Hi); break;
case ISD::LOAD: ExpandResult_LOAD(cast<LoadSDNode>(N), Lo, Hi); break;
case ISD::AND:
case ISD::OR:
case ISD::XOR: ExpandResult_Logical(N, Lo, Hi); break;
case ISD::BSWAP: ExpandResult_BSWAP(N, Lo, Hi); break;
case ISD::ADD:
case ISD::SUB: ExpandResult_ADDSUB(N, Lo, Hi); break;
case ISD::ADDC:
@ -719,6 +724,22 @@ void DAGTypeLegalizer::ExpandResult_BIT_CONVERT(SDNode *N,
ExpandResult_LOAD(cast<LoadSDNode>(Op.Val), Lo, Hi);
}
void DAGTypeLegalizer::
ExpandResult_SIGN_EXTEND_INREG(SDNode *N, SDOperand &Lo, SDOperand &Hi) {
GetExpandedOp(N->getOperand(0), Lo, Hi);
// sext_inreg the low part if needed.
Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, Lo.getValueType(), Lo,
N->getOperand(1));
// The high part gets the sign extension from the lo-part. This handles
// things like sextinreg V:i64 from i8.
Hi = DAG.getNode(ISD::SRA, Hi.getValueType(), Lo,
DAG.getConstant(MVT::getSizeInBits(Hi.getValueType())-1,
TLI.getShiftAmountTy()));
}
void DAGTypeLegalizer::ExpandResult_LOAD(LoadSDNode *N,
SDOperand &Lo, SDOperand &Hi) {
MVT::ValueType VT = N->getValueType(0);
@ -792,6 +813,14 @@ void DAGTypeLegalizer::ExpandResult_Logical(SDNode *N,
Hi = DAG.getNode(N->getOpcode(), LL.getValueType(), LH, RH);
}
void DAGTypeLegalizer::ExpandResult_BSWAP(SDNode *N,
SDOperand &Lo, SDOperand &Hi) {
GetExpandedOp(N->getOperand(0), Hi, Lo); // Note swapped operands.
Lo = DAG.getNode(ISD::BSWAP, Lo.getValueType(), Lo);
Hi = DAG.getNode(ISD::BSWAP, Hi.getValueType(), Hi);
}
void DAGTypeLegalizer::ExpandResult_SELECT(SDNode *N,
SDOperand &Lo, SDOperand &Hi) {
SDOperand LL, LH, RL, RH;
@ -1362,6 +1391,8 @@ bool DAGTypeLegalizer::ExpandOperand(SDNode *N, unsigned OpNo) {
abort();
case ISD::TRUNCATE: Res = ExpandOperand_TRUNCATE(N); break;
case ISD::BIT_CONVERT: Res = ExpandOperand_BIT_CONVERT(N); break;
case ISD::SINT_TO_FP:
Res = ExpandOperand_SINT_TO_FP(N->getOperand(0), N->getValueType(0));
break;
@ -1401,6 +1432,10 @@ SDOperand DAGTypeLegalizer::ExpandOperand_TRUNCATE(SDNode *N) {
return DAG.getNode(ISD::TRUNCATE, N->getValueType(0), InL);
}
SDOperand DAGTypeLegalizer::ExpandOperand_BIT_CONVERT(SDNode *N) {
return CreateStackStoreLoad(N->getOperand(0), N->getValueType(0));
}
SDOperand DAGTypeLegalizer::ExpandOperand_SINT_TO_FP(SDOperand Source,
MVT::ValueType DestTy) {
// We know the destination is legal, but that the input needs to be expanded.