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Add a couple missing transforms in getSetCC that were triggering assertions

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in the PPC Pattern ISel


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21297 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2005-04-14 08:56:52 +00:00
parent c4ccc2db6b
commit 72ea281d61
1 changed files with 8 additions and 1 deletions
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9
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -436,11 +436,18 @@ SDOperand SelectionDAG::getSetCC(ISD::CondCode Cond, MVT::ValueType VT,
N2C = cast<ConstantSDNode>(N2.Val);
}
if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C2 == MinVal)
return getConstant(0, VT); // X < MIN --> false
// Canonicalize setgt X, Min --> setne X, Min
if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C2 == MinVal)
return getSetCC(ISD::SETNE, VT, N1, N2);
// 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
// If we have setugt X, Max-1, turn it into seteq X, Max
else if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C2 == MaxVal-1)
return getSetCC(ISD::SETEQ, VT, N1,
getConstant(MaxVal, N1.getValueType()));