Add manualRetain() and manualRelease() to ImmutableMapRef, and add a new constructor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169572 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/include/llvm/ADT/ImmutableMap.h b/include/llvm/ADT/ImmutableMap.h
index 4883c5ba0a..ce27d0536a 100644
--- a/include/llvm/ADT/ImmutableMap.h
+++ b/include/llvm/ADT/ImmutableMap.h
@@ -288,6 +288,13 @@ public:
       Factory(F) {
     if (Root) { Root->retain(); }
   }
+
+  explicit ImmutableMapRef(const ImmutableMap<KeyT, ValT> &X,
+                           typename ImmutableMap<KeyT, ValT>::Factory &F)
+    : Root(X.getRootWithoutRetain()),
+      Factory(F.getTreeFactory()) {
+    if (Root) { Root->retain(); }
+  }
   
   ImmutableMapRef(const ImmutableMapRef &X)
     : Root(X.Root),
@@ -318,6 +325,14 @@ public:
     return ImmutableMapRef(0, F);
   }
 
+  void manualRetain() {
+    if (Root) Root->retain();
+  }
+
+  void manualRelease() {
+    if (Root) Root->release();
+  }
+
   ImmutableMapRef add(key_type_ref K, data_type_ref D) {
     TreeTy *NewT = Factory->add(Root, std::pair<key_type, data_type>(K, D));
     return ImmutableMapRef(NewT, Factory);