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Reinstate this now that the offending opposite xform has been removed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26548 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1454,6 +1454,13 @@ SDOperand DAGCombiner::visitSHL(SDNode *N) {
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if (N1C && N0.getOpcode() == ISD::SRA && N1 == N0.getOperand(1))
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return DAG.getNode(ISD::AND, VT, N0.getOperand(0),
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DAG.getConstant(~0ULL << N1C->getValue(), VT));
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// fold (shl (add x, c1), c2) -> (add (shl x, c2), c1<<c2)
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if (N1C && N0.getOpcode() == ISD::ADD && N0.Val->hasOneUse() &&
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isa<ConstantSDNode>(N0.getOperand(1))) {
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return DAG.getNode(ISD::ADD, VT,
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DAG.getNode(ISD::SHL, VT, N0.getOperand(0), N1),
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DAG.getNode(ISD::SHL, VT, N0.getOperand(1), N1));
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}
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return SDOperand();
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}
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