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Fix a problem duraid encountered on itanium where this folding:

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select (x < y), 1, 0 -> (x < y) incorrectly: the setcc returns i1 but the
select returned i32.  Add the zero extend as needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23301 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-09-09 23:00:07 +00:00
parent 08addbd477
commit 3ec5d74fc5
1 changed files with 6 additions and 2 deletions
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8
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -974,8 +974,12 @@ SDOperand SelectionDAG::SimplifySelectCC(SDOperand N1, SDOperand N2,
// Check to see if this is the equivalent of setcc
if (N4C && N4C->isNullValue() && N3C && (N3C->getValue() == 1ULL)) {
MVT::ValueType XType = N1.getValueType();
if (TLI.isOperationLegal(ISD::SETCC, TLI.getSetCCResultTy()))
return getSetCC(TLI.getSetCCResultTy(), N1, N2, CC);
if (TLI.isOperationLegal(ISD::SETCC, TLI.getSetCCResultTy())) {
SDOperand Res = getSetCC(TLI.getSetCCResultTy(), N1, N2, CC);
if (Res.getValueType() != VT)
Res = getNode(ISD::ZERO_EXTEND, VT, Res);
return Res;
}
// seteq X, 0 -> srl (ctlz X, log2(size(X)))
if (N2C && N2C->isNullValue() && CC == ISD::SETEQ &&