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add expand support for extractelement 

llvm-svn: 26931
This commit is contained in:
Chris Lattner 2006-03-21 21:02:03 +00:00
parent 00f4683bf6
commit 340a6b5c26
1 changed files with 31 additions and 1 deletions
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32
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -826,7 +826,37 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Tmp1 = LegalizeOp(Node->getOperand(0));
Tmp2 = LegalizeOp(Node->getOperand(1));
Result = DAG.UpdateNodeOperands(Result, Tmp1, Tmp2);
// FIXME: LOWER.
switch (TLI.getOperationAction(ISD::EXTRACT_VECTOR_ELT,
Tmp1.getValueType())) {
default: assert(0 && "This action is not supported yet!");
case TargetLowering::Legal:
break;
case TargetLowering::Custom:
Tmp3 = TLI.LowerOperation(Result, DAG);
if (Tmp3.Val) {
Result = Tmp3;
break;
}
// FALLTHROUGH
case TargetLowering::Expand: {
// If the target doesn't support this, store the value to a temporary
// stack slot, then LOAD the scalar element back out.
SDOperand StackPtr = CreateStackTemporary(Tmp1.getValueType());
SDOperand Ch = DAG.getNode(ISD::STORE, MVT::Other, DAG.getEntryNode(),
Tmp1, StackPtr, DAG.getSrcValue(NULL));
// Add the offset to the index.
unsigned EltSize = MVT::getSizeInBits(Result.getValueType())/8;
Tmp2 = DAG.getNode(ISD::MUL, Tmp2.getValueType(), Tmp2,
DAG.getConstant(EltSize, Tmp2.getValueType()));
StackPtr = DAG.getNode(ISD::ADD, Tmp2.getValueType(), Tmp2, StackPtr);
Result = DAG.getLoad(Result.getValueType(), Ch, StackPtr,
DAG.getSrcValue(NULL));
break;
}
}
break;
case ISD::VEXTRACT_VECTOR_ELT: