Index: include/llvm/IR/DomTreeUpdater.h
===================================================================
--- include/llvm/IR/DomTreeUpdater.h
+++ include/llvm/IR/DomTreeUpdater.h
@@ -31,11 +31,18 @@
   explicit DomTreeUpdater(UpdateStrategy Strategy_) : Strategy(Strategy_) {}
   DomTreeUpdater(DominatorTree &DT_, UpdateStrategy Strategy_)
       : DT(&DT_), Strategy(Strategy_) {}
+  DomTreeUpdater(DominatorTree *DT_, UpdateStrategy Strategy_)
+      : DT(DT_), Strategy(Strategy_) {}
   DomTreeUpdater(PostDominatorTree &PDT_, UpdateStrategy Strategy_)
       : PDT(&PDT_), Strategy(Strategy_) {}
+  DomTreeUpdater(PostDominatorTree *PDT_, UpdateStrategy Strategy_)
+      : PDT(PDT_), Strategy(Strategy_) {}
   DomTreeUpdater(DominatorTree &DT_, PostDominatorTree &PDT_,
                  UpdateStrategy Strategy_)
       : DT(&DT_), PDT(&PDT_), Strategy(Strategy_) {}
+  DomTreeUpdater(DominatorTree *DT_, PostDominatorTree *PDT_,
+                 UpdateStrategy Strategy_)
+      : DT(DT_), PDT(PDT_), Strategy(Strategy_) {}
 
   ~DomTreeUpdater() { flush(); }
 
Index: unittests/IR/DomTreeUpdaterTest.cpp
===================================================================
--- unittests/IR/DomTreeUpdaterTest.cpp
+++ unittests/IR/DomTreeUpdaterTest.cpp
@@ -235,7 +235,8 @@
 
   // Make the DTU.
   DominatorTree DT(*F);
-  DomTreeUpdater DTU(DT, DomTreeUpdater::UpdateStrategy::Lazy);
+  PostDominatorTree *PDT = nullptr;
+  DomTreeUpdater DTU(&DT, PDT, DomTreeUpdater::UpdateStrategy::Lazy);
   ASSERT_TRUE(DTU.hasDomTree());
   ASSERT_FALSE(DTU.hasPostDomTree());
   ASSERT_EQ(DTU.getUpdateStrategy(), DomTreeUpdater::UpdateStrategy::Lazy);
@@ -323,7 +324,8 @@
 
   // Make the DTU.
   DominatorTree DT(*F);
-  DomTreeUpdater DTU(DT, DomTreeUpdater::UpdateStrategy::Lazy);
+  PostDominatorTree *PDT = nullptr;
+  DomTreeUpdater DTU(&DT, PDT, DomTreeUpdater::UpdateStrategy::Lazy);
   ASSERT_TRUE(DTU.hasDomTree());
   ASSERT_FALSE(DTU.hasPostDomTree());
   ASSERT_EQ(DTU.getUpdateStrategy(), DomTreeUpdater::UpdateStrategy::Lazy);
@@ -449,7 +451,7 @@
   // Make the DTU.
   DominatorTree DT(*F);
   PostDominatorTree PDT(*F);
-  DomTreeUpdater DTU(DT, PDT, DomTreeUpdater::UpdateStrategy::Lazy);
+  DomTreeUpdater DTU(&DT, &PDT, DomTreeUpdater::UpdateStrategy::Lazy);
   ASSERT_TRUE(DTU.hasDomTree());
   ASSERT_TRUE(DTU.hasPostDomTree());
   ASSERT_EQ(DTU.getUpdateStrategy(), DomTreeUpdater::UpdateStrategy::Lazy);