+ case TargetLowering::TypeSplitVector:
+ EVT InVT = InOp.getValueType();
+ assert(InVT.isVector() && "Cannot split scalar types");
+ unsigned NumElts = InVT.getVectorNumElements();
+ assert(NumElts == NVT.getVectorNumElements() &&
+ "Dst and Src must have the same number of elements");
+ EVT EltVT = InVT.getScalarType();
+ assert(isPowerOf2_32(NumElts) &&
+ "Promoted vector type must be a power of two");
+
+ EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts/2);
+ EVT HalfNVT = EVT::getVectorVT(*DAG.getContext(), NVT.getScalarType(),
+ NumElts/2);
+
+ SDValue EOp1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, HalfVT, InOp,
+ DAG.getIntPtrConstant(0));
+ SDValue EOp2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, HalfVT, InOp,
+ DAG.getIntPtrConstant(NumElts/2));
+ EOp1 = DAG.getNode(ISD::TRUNCATE, dl, HalfNVT, EOp1);
+ EOp2 = DAG.getNode(ISD::TRUNCATE, dl, HalfNVT, EOp2);
+
+ return DAG.getNode(ISD::CONCAT_VECTORS, dl, NVT, EOp1, EOp2);