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Chain producing nodes cannot be moved, not chain reading nodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42627 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -397,17 +397,19 @@ SUnit *ScheduleDAGRRList::CopyAndMoveSuccessors(SUnit *SU) {
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return NULL;
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SUnit *NewSU;
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for (unsigned i = 0, e = N->getNumValues(); i != e; ++i)
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if (N->getValueType(i) == MVT::Flag)
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return NULL;
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bool TryUnfold = false;
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for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) {
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MVT::ValueType VT = N->getValueType(i);
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if (VT == MVT::Flag)
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return NULL;
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else if (VT == MVT::Other)
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TryUnfold = true;
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}
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for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
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const SDOperand &Op = N->getOperand(i);
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MVT::ValueType VT = Op.Val->getValueType(Op.ResNo);
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if (VT == MVT::Flag)
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return NULL;
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else if (VT == MVT::Other)
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TryUnfold = true;
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}
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if (TryUnfold) {
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