diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 3b6bc879e31..4c9e34b533e 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -14857,9 +14857,11 @@ void DAGCombiner::getStoreMergeCandidates( RootNode = St->getChain().getNode(); + unsigned NumNodesExplored = 0; if (LoadSDNode *Ldn = dyn_cast<LoadSDNode>(RootNode)) { RootNode = Ldn->getChain().getNode(); - for (auto I = RootNode->use_begin(), E = RootNode->use_end(); I != E; ++I) + for (auto I = RootNode->use_begin(), E = RootNode->use_end(); + I != E && NumNodesExplored < 1024; ++I, ++NumNodesExplored) if (I.getOperandNo() == 0 && isa<LoadSDNode>(*I)) // walk down chain for (auto I2 = (*I)->use_begin(), E2 = (*I)->use_end(); I2 != E2; ++I2) if (I2.getOperandNo() == 0) @@ -14870,7 +14872,8 @@ void DAGCombiner::getStoreMergeCandidates( StoreNodes.push_back(MemOpLink(OtherST, PtrDiff)); } } else - for (auto I = RootNode->use_begin(), E = RootNode->use_end(); I != E; ++I) + for (auto I = RootNode->use_begin(), E = RootNode->use_end(); + I != E && NumNodesExplored < 1024; ++I, ++NumNodesExplored) if (I.getOperandNo() == 0) if (StoreSDNode *OtherST = dyn_cast<StoreSDNode>(*I)) { BaseIndexOffset Ptr; |
