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Let the combiner handle more cases

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23641 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2005-10-05 21:44:43 +00:00
parent 829cb81806
commit 0558f61b0c
1 changed files with 4 additions and 1 deletions
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5
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -854,6 +854,7 @@ SDOperand SelectionDAG::SimplifySetCC(MVT::ValueType VT, SDOperand N1,
return getSetCC(VT, N2, N1, ISD::getSetCCSwappedOperands(Cond));
}
if (!CombinerEnabled) {
if (N1 == N2) {
// We can always fold X == Y for integer setcc's.
if (MVT::isInteger(N1.getValueType()))
@ -979,7 +980,7 @@ SDOperand SelectionDAG::SimplifySetCC(MVT::ValueType VT, SDOperand N1,
N1 = getNode(ISD::ZERO_EXTEND, VT, N1);
return N1;
}
}
// Could not fold it.
return SDOperand();
}
@ -1807,6 +1808,7 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
if (N2 == N3) return N2; // select C, X, X -> X
if (!CombinerEnabled) {
if (VT == MVT::i1) { // Boolean SELECT
if (N2C) {
if (N2C->getValue()) // select C, 1, X -> C | X
@ -1834,6 +1836,7 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
N3, cast<CondCodeSDNode>(N1.getOperand(2))->get());
if (Simp.Val) return Simp;
}
}
break;
case ISD::BRCOND:
if (N2C)