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-rw-r--r--include/llvm/ADT/DenseMap.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/llvm/ADT/DenseMap.h b/include/llvm/ADT/DenseMap.h
index daeda28d12..0ed2d5a252 100644
--- a/include/llvm/ADT/DenseMap.h
+++ b/include/llvm/ADT/DenseMap.h
@@ -145,6 +145,9 @@ public:
return ValueT();
}
+ // Inserts key,value pair into the map if the key isn't already in the map.
+ // If the key is already in the map, it returns false and doesn't update the
+ // value.
std::pair<iterator, bool> insert(const std::pair<KeyT, ValueT> &KV) {
BucketT *TheBucket;
if (LookupBucketFor(KV.first, TheBucket))