-/// GetSplitDestVTs - Compute the VTs needed for the low/hi parts of a type
-/// which is split into two not necessarily identical pieces.
-void DAGTypeLegalizer::GetSplitDestVTs(MVT InVT, MVT &LoVT, MVT &HiVT) {
- // Currently all types are split in half.
- if (!InVT.isVector()) {
- LoVT = HiVT = TLI.getTypeToTransformTo(InVT);
- } else {
- unsigned NumElements = InVT.getVectorNumElements();
- assert(!(NumElements & 1) && "Splitting vector, but not in half!");
- LoVT = HiVT = MVT::getVectorVT(InVT.getVectorElementType(), NumElements/2);
- }
+
+/// CustomWidenLowerNode - Widen the node's results with custom code provided
+/// by the target and return "true", or do nothing and return "false".
+bool DAGTypeLegalizer::CustomWidenLowerNode(SDNode *N, EVT VT) {
+ // See if the target wants to custom lower this node.
+ if (TLI.getOperationAction(N->getOpcode(), VT) != TargetLowering::Custom)
+ return false;
+
+ SmallVector<SDValue, 8> Results;
+ TLI.ReplaceNodeResults(N, Results, DAG);
+
+ if (Results.empty())
+ // The target didn't want to custom widen lower its result after all.
+ return false;
+
+ // Update the widening map.
+ assert(Results.size() == N->getNumValues() &&
+ "Custom lowering returned the wrong number of results!");
+ for (unsigned i = 0, e = Results.size(); i != e; ++i)
+ SetWidenedVector(SDValue(N, i), Results[i]);
+ return true;
+}
+
+SDValue DAGTypeLegalizer::DisintegrateMERGE_VALUES(SDNode *N, unsigned ResNo) {
+ for (unsigned i = 0, e = N->getNumValues(); i != e; ++i)
+ if (i != ResNo)
+ ReplaceValueWith(SDValue(N, i), SDValue(N->getOperand(i)));
+ return SDValue(N->getOperand(ResNo));