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merge a few pieces of code that do the store/load to stack

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pattern to use EmitStackConvert now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46066 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-01-16 07:51:34 +00:00
parent 1401d15c99
commit a66bb39e97
1 changed files with 12 additions and 30 deletions
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42
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -3573,20 +3573,12 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
break;
case ISD::FP_EXTEND: {
MVT::ValueType newVT = Op.getValueType();
MVT::ValueType oldVT = Op.getOperand(0).getValueType();
if (TLI.getConvertAction(oldVT, newVT) == TargetLowering::Expand) {
MVT::ValueType DstVT = Op.getValueType();
MVT::ValueType SrcVT = Op.getOperand(0).getValueType();
if (TLI.getConvertAction(SrcVT, DstVT) == TargetLowering::Expand) {
// The only other way we can lower this is to turn it into a STORE,
// LOAD pair, targetting a temporary location (a stack slot).
// NOTE: there is a choice here between constantly creating new stack
// slots and always reusing the same one. We currently always create
// new ones, as reuse may inhibit scheduling.
SDOperand StackSlot = DAG.CreateStackTemporary(oldVT);
Result = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0),
StackSlot, NULL, 0);
Result = DAG.getExtLoad(ISD::EXTLOAD, newVT,
Result, StackSlot, NULL, 0, oldVT);
Result = EmitStackConvert(Node->getOperand(0), SrcVT, DstVT);
break;
}
}
@ -3603,25 +3595,18 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
}
break;
case ISD::FP_ROUND: {
MVT::ValueType newVT = Op.getValueType();
MVT::ValueType oldVT = Op.getOperand(0).getValueType();
if (TLI.getConvertAction(oldVT, newVT) == TargetLowering::Expand) {
if (oldVT == MVT::ppcf128) {
MVT::ValueType DstVT = Op.getValueType();
MVT::ValueType SrcVT = Op.getOperand(0).getValueType();
if (TLI.getConvertAction(SrcVT, DstVT) == TargetLowering::Expand) {
if (SrcVT == MVT::ppcf128) {
SDOperand Lo, Hi;
ExpandOp(Node->getOperand(0), Lo, Hi);
Result = DAG.getNode(ISD::FP_ROUND, newVT, Hi);
Result = DAG.getNode(ISD::FP_ROUND, DstVT, Hi);
break;
} else {
// The only other way we can lower this is to turn it into a STORE,
// LOAD pair, targetting a temporary location (a stack slot).
// NOTE: there is a choice here between constantly creating new stack
// slots and always reusing the same one. We currently always create
// new ones, as reuse may inhibit scheduling.
SDOperand StackSlot = DAG.CreateStackTemporary(newVT);
Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
StackSlot, NULL, 0, newVT);
Result = DAG.getLoad(newVT, Result, StackSlot, NULL, 0);
Result = EmitStackConvert(Node->getOperand(0), DstVT, DstVT);
break;
}
}
@ -3700,11 +3685,8 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
// NOTE: there is a choice here between constantly creating new stack
// slots and always reusing the same one. We currently always create
// new ones, as reuse may inhibit scheduling.
SDOperand StackSlot = DAG.CreateStackTemporary(ExtraVT);
Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
StackSlot, NULL, 0, ExtraVT);
Result = DAG.getExtLoad(ISD::EXTLOAD, Node->getValueType(0),
Result, StackSlot, NULL, 0, ExtraVT);
Result = EmitStackConvert(Node->getOperand(0), ExtraVT,
Node->getValueType(0));
} else {
assert(0 && "Unknown op");
}