// Generic Operand Expansion.
//===--------------------------------------------------------------------===//
+void DAGTypeLegalizer::IntegerToVector(SDValue Op, unsigned NumElements,
+ SmallVectorImpl<SDValue> &Ops,
+ EVT EltVT) {
+ assert(Op.getValueType().isInteger());
+ SDLoc DL(Op);
+ SDValue Parts[2];
+
+ if (NumElements > 1) {
+ NumElements >>= 1;
+ SplitInteger(Op, Parts[0], Parts[1]);
+ if (TLI.isBigEndian())
+ std::swap(Parts[0], Parts[1]);
+ IntegerToVector(Parts[0], NumElements, Ops, EltVT);
+ IntegerToVector(Parts[1], NumElements, Ops, EltVT);
+ } else {
+ Ops.push_back(DAG.getNode(ISD::BITCAST, DL, EltVT, Op));
+ }
+}
+
SDValue DAGTypeLegalizer::ExpandOp_BITCAST(SDNode *N) {
SDLoc dl(N);
if (N->getValueType(0).isVector()) {
// instead, but only if the new vector type is legal (otherwise there
// is no point, and it might create expansion loops). For example, on
// x86 this turns v1i64 = BITCAST i64 into v1i64 = BITCAST v2i32.
+ //
+ // FIXME: I'm not sure why we are first trying to split the input into
+ // a 2 element vector, so I'm leaving it here to maintain the current
+ // behavior.
+ unsigned NumElts = 2;
EVT OVT = N->getOperand(0).getValueType();
EVT NVT = EVT::getVectorVT(*DAG.getContext(),
TLI.getTypeToTransformTo(*DAG.getContext(), OVT),
- 2);
-
- if (isTypeLegal(NVT)) {
- SDValue Parts[2];
- GetExpandedOp(N->getOperand(0), Parts[0], Parts[1]);
+ NumElts);
+ if (!isTypeLegal(NVT)) {
+ // If we can't find a legal type by splitting the integer in half,
+ // then we can use the node's value type.
+ NumElts = N->getValueType(0).getVectorNumElements();
+ NVT = N->getValueType(0);
+ }
- if (TLI.isBigEndian())
- std::swap(Parts[0], Parts[1]);
+ SmallVector<SDValue, 8> Ops;
+ IntegerToVector(N->getOperand(0), NumElts, Ops, NVT.getVectorElementType());
- SDValue Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, NVT, Parts, 2);
- return DAG.getNode(ISD::BITCAST, dl, N->getValueType(0), Vec);
- }
+ SDValue Vec = DAG.getNode(ISD::BUILD_VECTOR, dl, NVT, &Ops[0], NumElts);
+ return DAG.getNode(ISD::BITCAST, dl, N->getValueType(0), Vec);
}
// Otherwise, store to a temporary and load out again as the new type.