From: Evan Cheng Date: Wed, 31 May 2006 06:08:35 +0000 (+0000) Subject: visitVBinOp: Can't fold divide by zero! X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7b336a87466da67cbd528d124e38c12390707a24;p=oota-llvm.git visitVBinOp: Can't fold divide by zero! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28584 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index c05c976f390..938e17a084f 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -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(RHSOp.Val)->isNullValue()) || + (RHSOp.getOpcode() == ISD::ConstantFP && + !cast(RHSOp.Val)->getValue())) + break; + } Ops.push_back(DAG.getNode(ScalarOp, EltType, LHSOp, RHSOp)); AddToWorkList(Ops.back().Val); assert((Ops.back().getOpcode() == ISD::UNDEF ||