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Add basic support for legalizing returns of vectors 

llvm-svn: 27578
This commit is contained in:
Chris Lattner 2006-04-11 01:31:51 +00:00
parent 92533cfb4a
commit 2eb22eef7d
1 changed files with 36 additions and 9 deletions
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45
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1397,20 +1397,47 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Tmp1 = DAG.getNode(ISD::TokenFactor, MVT::Other, Tmp1, LastCALLSEQ_END);
Tmp1 = LegalizeOp(Tmp1);
LastCALLSEQ_END = DAG.getEntryNode();
Tmp2 = Node->getOperand(1);
switch (Node->getNumOperands()) {
case 2: // ret val
switch (getTypeAction(Node->getOperand(1).getValueType())) {
switch (getTypeAction(Tmp2.getValueType())) {
case Legal:
Tmp2 = LegalizeOp(Node->getOperand(1));
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
Result = DAG.UpdateNodeOperands(Result, Tmp1, LegalizeOp(Tmp2));
break;
case Expand: {
SDOperand Lo, Hi;
ExpandOp(Node->getOperand(1), Lo, Hi);
Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Hi);
case Expand:
if (Tmp2.getValueType() != MVT::Vector) {
SDOperand Lo, Hi;
ExpandOp(Tmp2, Lo, Hi);
Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Hi);
} else {
SDNode *InVal = Tmp2.Val;
unsigned NumElems =
cast<ConstantSDNode>(*(InVal->op_end()-2))->getValue();
MVT::ValueType EVT = cast<VTSDNode>(*(InVal->op_end()-1))->getVT();
// Figure out if there is a Packed type corresponding to this Vector
// type. If so, convert to the packed type.
MVT::ValueType TVT = MVT::getVectorType(EVT, NumElems);
if (TVT != MVT::Other && TLI.isTypeLegal(TVT)) {
// Turn this into a return of the packed type.
Tmp2 = PackVectorOp(Tmp2, TVT);
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
} else if (NumElems == 1) {
// Turn this into a return of the scalar type.
Tmp2 = PackVectorOp(Tmp2, EVT);
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
// The scalarized value type may not be legal, e.g. it might require
// promotion or expansion. Relegalize the return.
Result = LegalizeOp(Result);
} else {
SDOperand Lo, Hi;
SplitVectorOp(Tmp2, Lo, Hi);
Result = DAG.getNode(ISD::RET, MVT::Other, Tmp1, Lo, Hi);
Result = LegalizeOp(Result);
}
}
break;
}
case Promote:
Tmp2 = PromoteOp(Node->getOperand(1));
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);