fix: pr comment, feat: new test for SmallDenseSet.

Author: vbvictor

llvm/include/llvm/ADT/DenseMap.h

@@ -303,6 +303,7 @@ class DenseMapBase : public DebugEpochBase {
       insert(*I);
   }
 
+  /// Inserts range of 'std::pair<KeyT, ValueT>' values into the map.
   template <typename Range> void insert_range(Range &&R) {
     insert(adl_begin(R), adl_end(R));
   }

llvm/unittests/ADT/DenseMapTest.cpp

@@ -385,7 +385,7 @@ TEST(DenseMapCustomTest, InsertRange) {
   std::pair<int, int> InputVals[3] = {{0, 0}, {0, 1}, {1, 2}};
   M.insert_range(InputVals);
 
-  EXPECT_EQ(2u, M.size());
+  EXPECT_EQ(M.size(), 2u);
   EXPECT_THAT(M, testing::UnorderedElementsAre(testing::Pair(0, 0),
                                                testing::Pair(1, 2)));
 }

llvm/unittests/ADT/DenseSetTest.cpp

@@ -58,6 +58,13 @@ TEST(DenseSetTest, InsertRange) {
   EXPECT_THAT(set, ::testing::UnorderedElementsAre(1, 2, 3));
 }
 
+TEST(SmallDenseSetTest, InsertRange) {
+  llvm::SmallDenseSet<unsigned> set;
+  constexpr unsigned Args[] = {9, 7, 8};
+  set.insert_range(Args);
+  EXPECT_THAT(set, ::testing::UnorderedElementsAre(7, 8, 9));
+}
+
 struct TestDenseSetInfo {
   static inline unsigned getEmptyKey() { return ~0; }
   static inline unsigned getTombstoneKey() { return ~0U - 1; }