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visitVBinOp: Can't fold divide by zero!

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llvm-svn: 28584
This commit is contained in:
Evan Cheng 2006-05-31 06:08:35 +00:00
parent d5b51c6db3
commit bbc183c90e
1 changed files with 8 additions and 0 deletions
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8
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -2778,6 +2778,14 @@ SDOperand DAGCombiner::visitVBinOp(SDNode *N, ISD::NodeType IntOp,
RHSOp.getOpcode() != ISD::Constant &&
RHSOp.getOpcode() != ISD::ConstantFP))
break;
// Can't fold divide by zero.
if (N->getOpcode() == ISD::VSDIV || N->getOpcode() == ISD::VUDIV) {
if ((RHSOp.getOpcode() == ISD::Constant &&
cast<ConstantSDNode>(RHSOp.Val)->isNullValue()) ||
(RHSOp.getOpcode() == ISD::ConstantFP &&
!cast<ConstantFPSDNode>(RHSOp.Val)->getValue()))
break;
}
Ops.push_back(DAG.getNode(ScalarOp, EltType, LHSOp, RHSOp));
AddToWorkList(Ops.back().Val);
assert((Ops.back().getOpcode() == ISD::UNDEF ||