diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/TargetLowering.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/TargetLowering.cpp | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 9f9d8b0ffd..2cb4fc9c3c 100644 --- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -1855,9 +1855,19 @@ TargetLowering::SimplifySetCC(EVT VT, SDValue N0, SDValue N1, SDValue Op0 = N0; if (Op0.getOpcode() == ISD::TRUNCATE) Op0 = Op0.getOperand(0); - if (Op0.getOpcode() == ISD::AND && - isa<ConstantSDNode>(Op0.getOperand(1)) && - cast<ConstantSDNode>(Op0.getOperand(1))->getAPIntValue() == 1) { + + if ((Op0.getOpcode() == ISD::XOR || Op0.getOpcode() == ISD::AND) && + Op0.getOperand(0).getOpcode() == ISD::SETCC && + Op0.getOperand(1).getOpcode() == ISD::SETCC) { + // (and (setcc), (setcc)) == / != 1 -> (setcc) == / != (setcc) + // (xor (setcc), (setcc)) == / != 1 -> (setcc) != / == (setcc) + if (Op0.getOpcode() == ISD::XOR) + Cond = (Cond == ISD::SETEQ) ? ISD::SETNE : ISD::SETEQ; + return DAG.getSetCC(dl, VT, Op0.getOperand(0), Op0.getOperand(1), + Cond); + } else if (Op0.getOpcode() == ISD::AND && + isa<ConstantSDNode>(Op0.getOperand(1)) && + cast<ConstantSDNode>(Op0.getOperand(1))->getAPIntValue() == 1) { if (Op0.getValueType() != VT) Op0 = DAG.getNode(ISD::AND, dl, VT, DAG.getNode(ISD::TRUNCATE, dl, VT, Op0.getOperand(0)), |