} else {
// The type might not be legal for the target. This should only happen
// if the type is smaller than a legal type, as on PPC, so the right
- // thing to do is generate a LoadExt/StoreTrunc pair.
+ // thing to do is generate a LoadExt/StoreTrunc pair. These simplify
+ // to Load/Store if NVT==VT.
// FIXME does the case above also need this?
- if (TLI.isTypeLegal(VT)) {
- Value = DAG.getLoad(VT, dl, Chain,
- getMemBasePlusOffset(Src, SrcOff, DAG),
- SrcSV, SrcSVOff + SrcOff, false, Align);
- Store = DAG.getStore(Chain, dl, Value,
+ MVT NVT = TLI.getTypeToTransformTo(VT);
+ assert(NVT.bitsGE(VT));
+ Value = DAG.getExtLoad(ISD::EXTLOAD, dl, NVT, Chain,
+ getMemBasePlusOffset(Src, SrcOff, DAG),
+ SrcSV, SrcSVOff + SrcOff, VT, false, Align);
+ Store = DAG.getTruncStore(Chain, dl, Value,
getMemBasePlusOffset(Dst, DstOff, DAG),
- DstSV, DstSVOff + DstOff, false, DstAlign);
- } else {
- MVT NVT = VT;
- while (!TLI.isTypeLegal(NVT)) {
- NVT = (MVT::SimpleValueType(NVT.getSimpleVT() + 1));
- }
- Value = DAG.getExtLoad(ISD::EXTLOAD, dl, NVT, Chain,
- getMemBasePlusOffset(Src, SrcOff, DAG),
- SrcSV, SrcSVOff + SrcOff, VT, false, Align);
- Store = DAG.getTruncStore(Chain, dl, Value,
- getMemBasePlusOffset(Dst, DstOff, DAG),
- DstSV, DstSVOff + DstOff, VT, false, DstAlign);
- }
+ DstSV, DstSVOff + DstOff, VT, false, DstAlign);
}
OutChains.push_back(Store);
SrcOff += VTSize;