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[DAGCombine] Ensure SDNode use iterator is incremented properly.

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Fixes an ASAN bug found by oss-fuzz.

llvm-svn: 321813
This commit is contained in:
Amara Emerson 2018-01-04 18:38:45 +00:00
parent d6aaa92099
commit 3b228c9dca
1 changed files with 2 additions and 2 deletions
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4
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -2816,8 +2816,8 @@ SDValue DAGCombiner::useDivRem(SDNode *Node) {
SDValue Op1 = Node->getOperand(1);
SDValue combined;
for (SDNode::use_iterator UI = Op0.getNode()->use_begin(),
UE = Op0.getNode()->use_end(); UI != UE;) {
SDNode *User = *UI++;
UE = Op0.getNode()->use_end(); UI != UE; ++UI) {
SDNode *User = *UI;
if (User == Node || User->use_empty())
continue;
// Convert the other matching node(s), too;