[llvm] [ADT] Add `DenseMap::insert_range` (PR #133600)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-adt

Author: Baranov Victor (vbvictor)

<details>
<summary>Changes</summary>

This PR add `DenseMap::insert_range` to `DenseMap` for consistency with existing `DenseSet::insert_range` and `SmallSet::insert_range`. 

---
Full diff: https://github.com/llvm/llvm-project/pull/133600.diff


2 Files Affected:

- (modified) llvm/include/llvm/ADT/DenseMap.h (+5) 
- (modified) llvm/unittests/ADT/DenseMapTest.cpp (+11) 


``````````diff
diff --git a/llvm/include/llvm/ADT/DenseMap.h b/llvm/include/llvm/ADT/DenseMap.h
index f0f992f8eac38..52834c8528eb0 100644
--- a/llvm/include/llvm/ADT/DenseMap.h
+++ b/llvm/include/llvm/ADT/DenseMap.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_ADT_DENSEMAP_H
 #define LLVM_ADT_DENSEMAP_H
 
+#include "llvm/ADT/ADL.h"
 #include "llvm/ADT/DenseMapInfo.h"
 #include "llvm/ADT/EpochTracker.h"
 #include "llvm/Support/AlignOf.h"
@@ -302,6 +303,10 @@ class DenseMapBase : public DebugEpochBase {
       insert(*I);
   }
 
+  template <typename Range> void insert_range(Range &&R) {
+    insert(adl_begin(R), adl_end(R));
+  }
+
   template <typename V>
   std::pair<iterator, bool> insert_or_assign(const KeyT &Key, V &&Val) {
     auto Ret = try_emplace(Key, std::forward<V>(Val));
diff --git a/llvm/unittests/ADT/DenseMapTest.cpp b/llvm/unittests/ADT/DenseMapTest.cpp
index d1bbdde8dfc26..695ac99728a02 100644
--- a/llvm/unittests/ADT/DenseMapTest.cpp
+++ b/llvm/unittests/ADT/DenseMapTest.cpp
@@ -379,6 +379,17 @@ TEST(DenseMapCustomTest, EqualityComparison) {
   EXPECT_NE(M1, M3);
 }
 
+TEST(DenseMapCustomTest, InsertRange) {
+  DenseMap<int, int> M;
+
+  std::pair<int, int> InputVals[3] = {{0, 0}, {0, 1}, {1, 2}};
+  M.insert_range(InputVals);
+
+  EXPECT_EQ(2u, M.size());
+  EXPECT_THAT(M, testing::UnorderedElementsAre(testing::Pair(0, 0),
+                                               testing::Pair(1, 2)));
+}
+
 // Test for the default minimum size of a DenseMap
 TEST(DenseMapCustomTest, DefaultMinReservedSizeTest) {
   // IF THIS VALUE CHANGE, please update InitialSizeTest, InitFromIterator, and

``````````

</details>


https://github.com/llvm/llvm-project/pull/133600