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Allow LowerOperation to return a null SDOperand in case it wants to lower
some things given to it, but not all. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23070 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1320,6 +1320,16 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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switch (TLI.getOperationAction(Node->getOpcode(), MVT::Other)) {
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default: assert(0 && "This action not implemented for this operation!");
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case TargetLowering::Custom: {
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SDOperand Tmp =
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TLI.LowerOperation(DAG.getNode(Node->getOpcode(), MVT::Other, Tmp1,
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Tmp2, Tmp3, Tmp4, Tmp5), DAG);
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if (Tmp.Val) {
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Result = LegalizeOp(Tmp);
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break;
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}
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// FALLTHROUGH if the target thinks it is legal.
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}
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case TargetLowering::Legal:
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if (Tmp1 != Node->getOperand(0) || Tmp2 != Node->getOperand(1) ||
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Tmp3 != Node->getOperand(2) || Tmp4 != Node->getOperand(3) ||
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@ -1363,14 +1373,6 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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NeedsAnotherIteration = true;
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break;
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}
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case TargetLowering::Custom:
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std::vector<SDOperand> Ops;
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Ops.push_back(Tmp1); Ops.push_back(Tmp2); Ops.push_back(Tmp3);
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Ops.push_back(Tmp4); Ops.push_back(Tmp5);
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Result = DAG.getNode(Node->getOpcode(), MVT::Other, Ops);
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Result = TLI.LowerOperation(Result, DAG);
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Result = LegalizeOp(Result);
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break;
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}
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break;
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}
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@ -1817,14 +1819,21 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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Node->getOpcode() == ISD::FP_TO_SINT);
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AddLegalizedOperand(Op, Result);
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return Result;
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case TargetLowering::Custom: {
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SDOperand Tmp =
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DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
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Tmp = TLI.LowerOperation(Tmp, DAG);
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if (Tmp.Val) {
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AddLegalizedOperand(Op, Tmp);
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NeedsAnotherIteration = true;
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return Result;
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} else {
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// The target thinks this is legal afterall.
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break;
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}
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}
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case TargetLowering::Legal:
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break;
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case TargetLowering::Custom:
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Result = DAG.getNode(Node->getOpcode(), Node->getValueType(0), Tmp1);
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Result = TLI.LowerOperation(Result, DAG);
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AddLegalizedOperand(Op, Result);
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NeedsAnotherIteration = true;
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return Result;
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}
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if (Tmp1 != Node->getOperand(0))
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@ -2746,9 +2755,13 @@ ExpandIntToFP(bool isSigned, MVT::ValueType DestTy, SDOperand Source) {
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case TargetLowering::Legal:
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case TargetLowering::Expand:
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break; // This case is handled below.
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case TargetLowering::Custom:
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Source = DAG.getNode(ISD::SINT_TO_FP, DestTy, Source);
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return LegalizeOp(TLI.LowerOperation(Source, DAG));
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case TargetLowering::Custom: {
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SDOperand NV = TLI.LowerOperation(DAG.getNode(ISD::SINT_TO_FP, DestTy,
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Source), DAG);
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if (NV.Val)
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return LegalizeOp(NV);
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break; // The target decided this was legal after all
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}
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}
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// Expand the source, then glue it back together for the call. We must expand
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@ -3040,8 +3053,10 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
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// Now that the custom expander is done, expand the result, which is still
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// VT.
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ExpandOp(Op, Lo, Hi);
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break;
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if (Op.Val) {
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ExpandOp(Op, Lo, Hi);
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break;
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}
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}
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if (Node->getOperand(0).getValueType() == MVT::f32)
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@ -3056,8 +3071,11 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
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LegalizeOp(Node->getOperand(0)));
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// Now that the custom expander is done, expand the result, which is still
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// VT.
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ExpandOp(TLI.LowerOperation(Op, DAG), Lo, Hi);
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break;
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Op = TLI.LowerOperation(Op, DAG);
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if (Op.Val) {
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ExpandOp(Op, Lo, Hi);
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break;
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}
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}
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if (Node->getOperand(0).getValueType() == MVT::f32)
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