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Canonicalize ladd constant to RHS.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98058 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Osborne 2010-03-09 16:13:57 +00:00
parent 7b871b3464
commit 78717cd804
1 changed files with 4 additions and 0 deletions
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4
lib/Target/XCore/XCoreISelLowering.cpp
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@ -1105,6 +1105,10 @@ SDValue XCoreTargetLowering::PerformDAGCombine(SDNode *N,
ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
EVT VT = N0.getValueType();
// canonicalize constant to RHS
if (N0C && !N1C)
return DAG.getNode(XCoreISD::LADD, dl, DAG.getVTList(VT, VT), N1, N0, N2);
// fold (ladd 0, 0, x) -> 0, x & 1
if (N0C && N0C->isNullValue() && N1C && N1C->isNullValue()) {
SDValue Carry = DAG.getConstant(0, VT);