- SDValue CastInOp = DAG.getNode(ISD::BIT_CONVERT, dl, NVT, InOp);
- Lo = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NOutVT, CastInOp,
- DAG.getIntPtrConstant(0));
- Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NOutVT, CastInOp,
- DAG.getIntPtrConstant(1));
-
- if (TLI.isBigEndian())
+ SDValue CastInOp = DAG.getNode(ISD::BITCAST, dl, NVT, InOp);
+
+ SmallVector<SDValue, 8> Vals;
+ for (unsigned i = 0; i < NumElems; ++i)
+ Vals.push_back(DAG.getNode(
+ ISD::EXTRACT_VECTOR_ELT, dl, ElemVT, CastInOp,
+ DAG.getConstant(i, dl, TLI.getVectorIdxTy(DAG.getDataLayout()))));
+
+ // Build Lo, Hi pair by pairing extracted elements if needed.
+ unsigned Slot = 0;
+ for (unsigned e = Vals.size(); e - Slot > 2; Slot += 2, e += 1) {
+ // Each iteration will BUILD_PAIR two nodes and append the result until
+ // there are only two nodes left, i.e. Lo and Hi.
+ SDValue LHS = Vals[Slot];
+ SDValue RHS = Vals[Slot + 1];
+
+ if (DAG.getDataLayout().isBigEndian())
+ std::swap(LHS, RHS);
+
+ Vals.push_back(DAG.getNode(ISD::BUILD_PAIR, dl,
+ EVT::getIntegerVT(
+ *DAG.getContext(),
+ LHS.getValueType().getSizeInBits() << 1),
+ LHS, RHS));
+ }
+ Lo = Vals[Slot++];
+ Hi = Vals[Slot++];
+
+ if (DAG.getDataLayout().isBigEndian())