diff --git a/llvm/include/llvm/Analysis/RegionInfoImpl.h b/llvm/include/llvm/Analysis/RegionInfoImpl.h
index ec79b35ae324..c5e8821858fd 100644
--- a/llvm/include/llvm/Analysis/RegionInfoImpl.h
+++ b/llvm/include/llvm/Analysis/RegionInfoImpl.h
@@ -163,9 +163,7 @@ typename RegionBase<Tr>::BlockT *RegionBase<Tr>::getEnteringBlock() const {
     assert(!AllowRepeats && "Unexpected parameter value.");
     return DT->getNode(Pred) && !contains(Pred) ? Pred : nullptr;
   };
-  BlockT *entry = getEntry();
-  return find_singleton<BlockT>(make_range(InvBlockTraits::child_begin(entry),
-                                           InvBlockTraits::child_end(entry)),
+  return find_singleton<BlockT>(llvm::inverse_children<BlockT *>(getEntry()),
                                 isEnteringBlock);
 }
 
@@ -177,10 +175,7 @@ bool RegionBase<Tr>::getExitingBlocks(
   if (!exit)
     return CoverAll;
 
-  for (PredIterTy PI = InvBlockTraits::child_begin(exit),
-                  PE = InvBlockTraits::child_end(exit);
-       PI != PE; ++PI) {
-    BlockT *Pred = *PI;
+  for (BlockT *Pred : llvm::inverse_children<BlockT *>(exit)) {
     if (contains(Pred)) {
       Exitings.push_back(Pred);
       continue;
@@ -202,8 +197,7 @@ typename RegionBase<Tr>::BlockT *RegionBase<Tr>::getExitingBlock() const {
     assert(!AllowRepeats && "Unexpected parameter value.");
     return contains(Pred) ? Pred : nullptr;
   };
-  return find_singleton<BlockT>(make_range(InvBlockTraits::child_begin(exit),
-                                           InvBlockTraits::child_end(exit)),
+  return find_singleton<BlockT>(llvm::inverse_children<BlockT *>(exit),
                                 isContained);
 }
 
@@ -244,16 +238,14 @@ void RegionBase<Tr>::verifyBBInRegion(BlockT *BB) const {
 
   BlockT *entry = getEntry(), *exit = getExit();
 
-  for (BlockT *Succ :
-       make_range(BlockTraits::child_begin(BB), BlockTraits::child_end(BB))) {
+  for (BlockT *Succ : llvm::children<BlockT *>(BB)) {
     if (!contains(Succ) && exit != Succ)
       report_fatal_error("Broken region found: edges leaving the region must go "
                          "to the exit node!");
   }
 
   if (entry != BB) {
-    for (BlockT *Pred : make_range(InvBlockTraits::child_begin(BB),
-                                   InvBlockTraits::child_end(BB))) {
+    for (BlockT *Pred : llvm::inverse_children<BlockT *>(BB)) {
       // Allow predecessors that are unreachable, as these are ignored during
       // region analysis.
       if (!contains(Pred) && DT->isReachableFromEntry(Pred))
@@ -271,8 +263,7 @@ void RegionBase<Tr>::verifyWalk(BlockT *BB, std::set<BlockT *> *visited) const {
 
   verifyBBInRegion(BB);
 
-  for (BlockT *Succ :
-       make_range(BlockTraits::child_begin(BB), BlockTraits::child_end(BB))) {
+  for (BlockT *Succ : llvm::children<BlockT *>(BB)) {
     if (Succ != exit && visited->find(Succ) == visited->end())
       verifyWalk(Succ, visited);
   }
@@ -453,8 +444,7 @@ typename Tr::RegionT *RegionBase<Tr>::getExpandedRegion() const {
   RegionT *R = RI->getRegionFor(exit);
 
   if (R->getEntry() != exit) {
-    for (BlockT *Pred : make_range(InvBlockTraits::child_begin(getExit()),
-                                   InvBlockTraits::child_end(getExit())))
+    for (BlockT *Pred : llvm::inverse_children<BlockT *>(getExit()))
       if (!contains(Pred))
         return nullptr;
     if (Tr::getNumSuccessors(exit) == 1)
@@ -465,8 +455,7 @@ typename Tr::RegionT *RegionBase<Tr>::getExpandedRegion() const {
   while (R->getParent() && R->getParent()->getEntry() == exit)
     R = R->getParent();
 
-  for (BlockT *Pred : make_range(InvBlockTraits::child_begin(getExit()),
-                                 InvBlockTraits::child_end(getExit()))) {
+  for (BlockT *Pred : llvm::inverse_children<BlockT *>(getExit())) {
     if (!(contains(Pred) || R->contains(Pred)))
       return nullptr;
   }
@@ -553,8 +542,7 @@ void RegionInfoBase<Tr>::verifyBBMap(const RegionT *R) const {
 template <class Tr>
 bool RegionInfoBase<Tr>::isCommonDomFrontier(BlockT *BB, BlockT *entry,
                                              BlockT *exit) const {
-  for (BlockT *P : make_range(InvBlockTraits::child_begin(BB),
-                              InvBlockTraits::child_end(BB))) {
+  for (BlockT *P : llvm::inverse_children<BlockT *>(BB)) {
     if (DT->dominates(entry, P) && !DT->dominates(exit, P))
       return false;
   }
@@ -837,8 +825,7 @@ RegionInfoBase<Tr>::getMaxRegionExit(BlockT *BB) const {
            ExitR->getParent()->getEntry() == Exit)
       ExitR = ExitR->getParent();
 
-    for (BlockT *Pred : make_range(InvBlockTraits::child_begin(Exit),
-                                   InvBlockTraits::child_end(Exit))) {
+    for (BlockT *Pred : llvm::inverse_children<BlockT *>(Exit)) {
       if (!R->contains(Pred) && !ExitR->contains(Pred))
         break;
     }