diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 513bab2f53..0243ebf5df 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -429,6 +429,15 @@ SDOperand SelectionDAG::getSetCC(ISD::CondCode Cond, MVT::ValueType VT, N2 = getConstant(C2, N2.getValueType()); N2C = cast<ConstantSDNode>(N2.Val); } + + // If we have setult X, 1, turn it into seteq X, 0 + if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal+1) + return getSetCC(ISD::SETEQ, VT, N1, + getConstant(MinVal, N1.getValueType())); + // If we have setult X, 1, turn it into seteq X, 0 + else if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C2 == MaxVal-1) + return getSetCC(ISD::SETEQ, VT, N1, + getConstant(MaxVal, N1.getValueType())); // If we have "setcc X, C1", check to see if we can shrink the immediate // by changing cc. |