diff --git a/llvm/include/llvm/Analysis/RegionInfo.h b/llvm/include/llvm/Analysis/RegionInfo.h
index 8d1739a679b8..4988386fdc82 100644
--- a/llvm/include/llvm/Analysis/RegionInfo.h
+++ b/llvm/include/llvm/Analysis/RegionInfo.h
@@ -800,12 +800,6 @@ public:
 
   RegionT *getTopLevelRegion() const { return TopLevelRegion; }
 
-  /// @brief Update RegionInfo after a basic block was split.
-  ///
-  /// @param NewBB The basic block that was created before OldBB.
-  /// @param OldBB The old basic block.
-  void splitBlock(BlockT *NewBB, BlockT *OldBB);
-
   /// @brief Clear the Node Cache for all Regions.
   ///
   /// @see Region::clearNodeCache()
diff --git a/llvm/include/llvm/Analysis/RegionInfoImpl.h b/llvm/include/llvm/Analysis/RegionInfoImpl.h
index a5157a92cf42..0598068d69d3 100644
--- a/llvm/include/llvm/Analysis/RegionInfoImpl.h
+++ b/llvm/include/llvm/Analysis/RegionInfoImpl.h
@@ -910,20 +910,6 @@ RegionInfoBase<Tr>::getCommonRegion(SmallVectorImpl<BlockT *> &BBs) const {
   return ret;
 }
 
-template <class Tr>
-void RegionInfoBase<Tr>::splitBlock(BlockT *NewBB, BlockT *OldBB) {
-  RegionT *R = getRegionFor(OldBB);
-
-  setRegionFor(NewBB, R);
-
-  while (R->getEntry() == OldBB && !R->isTopLevelRegion()) {
-    R->replaceEntry(NewBB);
-    R = R->getParent();
-  }
-
-  setRegionFor(OldBB, R);
-}
-
 template <class Tr>
 void RegionInfoBase<Tr>::calculate(FuncT &F) {
   typedef typename std::add_pointer<FuncT>::type FuncPtrT;