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When ExpandOp'ing a [SZ]EXTLOAD, make sure to remember that the chain

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is also legal.  Add support for ExpandOp'ing raw EXTLOADs too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23716 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-10-13 21:44:47 +00:00
parent 4c8f8f0481
commit 9ad8481cfb
1 changed files with 28 additions and 2 deletions
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30
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -3121,6 +3121,10 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
else
Lo = DAG.getExtLoad(ISD::SEXTLOAD, NVT, Chain, Ptr, Node->getOperand(2),
EVT);
// Remember that we legalized the chain.
AddLegalizedOperand(SDOperand(Node, 1), Lo.getValue(1));
// The high part is obtained by SRA'ing all but one of the bits of the lo
// part.
unsigned LoSize = MVT::getSizeInBits(Lo.getValueType());
@ -3140,10 +3144,32 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
else
Lo = DAG.getExtLoad(ISD::ZEXTLOAD, NVT, Chain, Ptr, Node->getOperand(2),
EVT);
// Remember that we legalized the chain.
AddLegalizedOperand(SDOperand(Node, 1), Lo.getValue(1));
// The high part is just a zero.
Hi = DAG.getConstant(0, NVT);
Hi = LegalizeOp(DAG.getConstant(0, NVT));
Lo = LegalizeOp(Lo);
break;
}
case ISD::EXTLOAD: {
SDOperand Chain = LegalizeOp(Node->getOperand(0));
SDOperand Ptr = LegalizeOp(Node->getOperand(1));
MVT::ValueType EVT = cast<VTSDNode>(Node->getOperand(3))->getVT();
if (EVT == NVT)
Lo = DAG.getLoad(NVT, Chain, Ptr, Node->getOperand(2));
else
Lo = DAG.getExtLoad(ISD::EXTLOAD, NVT, Chain, Ptr, Node->getOperand(2),
EVT);
// Remember that we legalized the chain.
AddLegalizedOperand(SDOperand(Node, 1), Lo.getValue(1));
// The high part is undefined.
Hi = LegalizeOp(DAG.getNode(ISD::UNDEF, NVT));
Lo = LegalizeOp(Lo);
Hi = LegalizeOp(Hi);
break;
}
case ISD::ANY_EXTEND: {