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Roll back the rest of r126557. It's a hack that will break in some obscure cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138130 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1526,12 +1526,6 @@ SDValue DAGCombiner::visitADDE(SDNode *N) {
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ConstantSDNode *N0C = dyn_cast<ConstantSDNode>(N0);
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ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
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// If both operands are null we know that carry out will always be false.
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if (N0C && N0C->isNullValue() && N0 == N1)
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DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), DAG.getNode(ISD::CARRY_FALSE,
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N->getDebugLoc(),
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MVT::Glue));
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// canonicalize constant to RHS
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if (N0C && !N1C)
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return DAG.getNode(ISD::ADDE, N->getDebugLoc(), N->getVTList(),
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