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Update per review comments. 

llvm-svn: 40965
This commit is contained in:
Dale Johannesen 2007-08-09 17:27:48 +00:00
parent 66dfa4b40c
commit c339e45274
2 changed files with 17 additions and 32 deletions
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4
llvm/include/llvm/Target/TargetLowering.h
View File

@ -333,8 +333,8 @@ public:
/// for it.
LegalizeAction
getConvertAction(MVT::ValueType FromVT, MVT::ValueType ToVT) const {
if (MVT::isExtendedVT(ToVT) || MVT::isExtendedVT(FromVT))
return Expand;
assert(FromVT < MVT::LAST_VALUETYPE && ToVT < 32 &&
"Table isn't big enough!");
return (LegalizeAction)((ConvertActions[FromVT] >> (2*ToVT)) & 3);
}

45
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -3194,51 +3194,36 @@ 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) {
// The only way we can lower this is to turn it into a STORE,
// EXTLOAD 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.
const Type *Ty = MVT::getTypeForValueType(oldVT);
uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
unsigned Align = TLI.getTargetData()->getPrefTypeAlignment(Ty);
MachineFunction &MF = DAG.getMachineFunction();
int SSFI =
MF.getFrameInfo()->CreateStackObject(TySize, Align);
SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
Result = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0),
StackSlot, NULL, 0);
Result = DAG.getExtLoad(ISD::EXTLOAD, newVT,
Result, StackSlot, NULL, 0, oldVT);
break;
}
}
// FALL THROUGH (to ANY_EXTEND case)
case ISD::FP_EXTEND:
case ISD::FP_ROUND: {
MVT::ValueType newVT = Op.getValueType();
MVT::ValueType oldVT = Op.getOperand(0).getValueType();
if (TLI.getConvertAction(oldVT, newVT) == TargetLowering::Expand) {
// The only way we can lower this is to turn it into a TRUNCSTORE,
// The only 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.
const Type *Ty = MVT::getTypeForValueType(newVT);
MVT::ValueType slotVT =
(Node->getOpcode() == ISD::FP_EXTEND) ? oldVT : newVT;
const Type *Ty = MVT::getTypeForValueType(slotVT);
uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
unsigned Align = TLI.getTargetData()->getPrefTypeAlignment(Ty);
MachineFunction &MF = DAG.getMachineFunction();
int SSFI =
MF.getFrameInfo()->CreateStackObject(TySize, Align);
SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
StackSlot, NULL, 0, newVT);
Result = DAG.getLoad(newVT, Result, StackSlot, NULL, 0, newVT);
if (Node->getOpcode() == ISD::FP_EXTEND) {
Result = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0),
StackSlot, NULL, 0);
Result = DAG.getExtLoad(ISD::EXTLOAD, newVT,
Result, StackSlot, NULL, 0, oldVT);
} else {
Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
StackSlot, NULL, 0, newVT);
Result = DAG.getLoad(newVT, Result, StackSlot, NULL, 0, newVT);
}
break;
}
}