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-rw-r--r--include/llvm/CodeGen/SelectionDAGNodes.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 051c93601d3f..5fb69ae232af 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -801,7 +801,8 @@ public:
/// if DAG changes.
static bool hasPredecessorHelper(const SDNode *N,
SmallPtrSetImpl<const SDNode *> &Visited,
- SmallVectorImpl<const SDNode *> &Worklist) {
+ SmallVectorImpl<const SDNode *> &Worklist,
+ unsigned int MaxSteps = 0) {
if (Visited.count(N))
return true;
while (!Worklist.empty()) {
@@ -816,6 +817,8 @@ public:
}
if (Found)
return true;
+ if (MaxSteps != 0 && Visited.size() >= MaxSteps)
+ return false;
}
return false;
}