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https://github.com/c64scene-ar/llvm-6502.git
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Update per review comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40965 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -333,8 +333,8 @@ public:
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/// for it.
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LegalizeAction
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getConvertAction(MVT::ValueType FromVT, MVT::ValueType ToVT) const {
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if (MVT::isExtendedVT(ToVT) || MVT::isExtendedVT(FromVT))
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return Expand;
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assert(FromVT < MVT::LAST_VALUETYPE && ToVT < 32 &&
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"Table isn't big enough!");
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return (LegalizeAction)((ConvertActions[FromVT] >> (2*ToVT)) & 3);
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}
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@ -3194,51 +3194,36 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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}
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break;
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case ISD::FP_EXTEND: {
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MVT::ValueType newVT = Op.getValueType();
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MVT::ValueType oldVT = Op.getOperand(0).getValueType();
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if (TLI.getConvertAction(oldVT, newVT) == TargetLowering::Expand) {
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// The only way we can lower this is to turn it into a STORE,
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// EXTLOAD pair, targetting a temporary location (a stack slot).
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// NOTE: there is a choice here between constantly creating new stack
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// slots and always reusing the same one. We currently always create
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// new ones, as reuse may inhibit scheduling.
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const Type *Ty = MVT::getTypeForValueType(oldVT);
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uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
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unsigned Align = TLI.getTargetData()->getPrefTypeAlignment(Ty);
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MachineFunction &MF = DAG.getMachineFunction();
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int SSFI =
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MF.getFrameInfo()->CreateStackObject(TySize, Align);
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SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
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Result = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0),
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StackSlot, NULL, 0);
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Result = DAG.getExtLoad(ISD::EXTLOAD, newVT,
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Result, StackSlot, NULL, 0, oldVT);
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break;
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}
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}
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// FALL THROUGH (to ANY_EXTEND case)
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case ISD::FP_EXTEND:
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case ISD::FP_ROUND: {
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MVT::ValueType newVT = Op.getValueType();
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MVT::ValueType oldVT = Op.getOperand(0).getValueType();
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if (TLI.getConvertAction(oldVT, newVT) == TargetLowering::Expand) {
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// The only way we can lower this is to turn it into a TRUNCSTORE,
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// The only way we can lower this is to turn it into a STORE,
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// LOAD pair, targetting a temporary location (a stack slot).
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// NOTE: there is a choice here between constantly creating new stack
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// slots and always reusing the same one. We currently always create
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// new ones, as reuse may inhibit scheduling.
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const Type *Ty = MVT::getTypeForValueType(newVT);
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MVT::ValueType slotVT =
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(Node->getOpcode() == ISD::FP_EXTEND) ? oldVT : newVT;
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const Type *Ty = MVT::getTypeForValueType(slotVT);
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uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty);
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unsigned Align = TLI.getTargetData()->getPrefTypeAlignment(Ty);
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MachineFunction &MF = DAG.getMachineFunction();
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int SSFI =
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MF.getFrameInfo()->CreateStackObject(TySize, Align);
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SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy());
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Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
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StackSlot, NULL, 0, newVT);
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Result = DAG.getLoad(newVT, Result, StackSlot, NULL, 0, newVT);
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if (Node->getOpcode() == ISD::FP_EXTEND) {
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Result = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0),
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StackSlot, NULL, 0);
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Result = DAG.getExtLoad(ISD::EXTLOAD, newVT,
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Result, StackSlot, NULL, 0, oldVT);
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} else {
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Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0),
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StackSlot, NULL, 0, newVT);
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Result = DAG.getLoad(newVT, Result, StackSlot, NULL, 0, newVT);
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}
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break;
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}
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}
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