diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index bcbac950f4..43028a80c2 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -3168,7 +3168,6 @@ SDOperand DAGCombiner::SimplifySelectCC(SDOperand N0, SDOperand N1, ISD::CondCode CC) { MVT::ValueType VT = N2.getValueType(); - //ConstantSDNode *N0C = dyn_cast<ConstantSDNode>(N0.Val); ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.Val); ConstantSDNode *N2C = dyn_cast<ConstantSDNode>(N2.Val); ConstantSDNode *N3C = dyn_cast<ConstantSDNode>(N3.Val); @@ -3204,9 +3203,11 @@ SDOperand DAGCombiner::SimplifySelectCC(SDOperand N0, SDOperand N1, // Check to see if we can perform the "gzip trick", transforming // select_cc setlt X, 0, A, 0 -> and (sra X, size(X)-1), A - if (N1C && N1C->isNullValue() && N3C && N3C->isNullValue() && + if (N1C && N3C && N3C->isNullValue() && CC == ISD::SETLT && MVT::isInteger(N0.getValueType()) && - MVT::isInteger(N2.getValueType()) && CC == ISD::SETLT) { + MVT::isInteger(N2.getValueType()) && + (N1C->isNullValue() || // (a < 0) ? b : 0 + (N1C->getValue() == 1 && N0 == N2))) { // (a < 1) ? a : 0 MVT::ValueType XType = N0.getValueType(); MVT::ValueType AType = N2.getValueType(); if (XType >= AType) { |