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don't add nodes to the now-dead nodes list multiple times, this

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can cause a crash on crazy situations in msp430 when morph-node-to
is disabled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99739 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-03-28 05:28:31 +00:00
parent a591ff53d9
commit 856fb395e4
1 changed files with 3 additions and 2 deletions
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5
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -1592,8 +1592,9 @@ UpdateChainsAndFlags(SDNode *NodeToMatch, SDValue InputChain,
assert(ChainVal.getValueType() == MVT::Other && "Not a chain?");
CurDAG->ReplaceAllUsesOfValueWith(ChainVal, InputChain, &ISU);
// If the node became dead, delete it.
if (ChainNode->use_empty())
// If the node became dead and we haven't already seen it, delete it.
if (ChainNode->use_empty() &&
!std::count(NowDeadNodes.begin(), NowDeadNodes.end(), ChainNode))
NowDeadNodes.push_back(ChainNode);
}
}