Index: include/llvm/Analysis/LoopAccessAnalysis.h
===================================================================
--- include/llvm/Analysis/LoopAccessAnalysis.h
+++ include/llvm/Analysis/LoopAccessAnalysis.h
@@ -384,7 +384,7 @@
                       bool UseDependencies);
 
   /// \brief Returns the checks that generateChecks created.
-  const SmallVectorImpl<PointerCheck> &getChecks() const { return Checks; }
+  const SmallVector<PointerCheck, 4> &getChecks() const { return Checks; }
 
   /// \brief Decide if we need to add a check between two groups of pointers,
   /// according to needsChecking.
Index: include/llvm/Transforms/Utils/LoopVersioning.h
===================================================================
--- include/llvm/Transforms/Utils/LoopVersioning.h
+++ include/llvm/Transforms/Utils/LoopVersioning.h
@@ -31,10 +31,17 @@
 /// already has a preheader.
 class LoopVersioning {
 public:
+  /// \brief Expects MemCheck, LoopAccessInfo, Loop, LoopInfo, DominatorTree 
+  /// as input. It uses runtime check provided by user.
   LoopVersioning(SmallVector<RuntimePointerChecking::PointerCheck, 4> Checks,
                  const LoopAccessInfo &LAI, Loop *L, LoopInfo *LI,
                  DominatorTree *DT);
 
+  /// \brief Expects LoopAccessInfo, Loop, LoopInfo, DominatorTree as input.
+  /// It uses default runtime check provided by LoopAccessInfo.
+  LoopVersioning(const LoopAccessInfo &LAInfo, Loop *L, LoopInfo *LI,
+                 DominatorTree *DT);
+
   /// \brief Performs the CFG manipulation part of versioning the loop including
   /// the DominatorTree and LoopInfo updates.
   ///
Index: lib/Transforms/Utils/LoopVersioning.cpp
===================================================================
--- lib/Transforms/Utils/LoopVersioning.cpp
+++ lib/Transforms/Utils/LoopVersioning.cpp
@@ -31,6 +31,15 @@
   assert(L->getLoopPreheader() && "No preheader");
 }
 
+LoopVersioning::LoopVersioning(const LoopAccessInfo &LAInfo, Loop *L,
+                               LoopInfo *LI, DominatorTree *DT)
+    : VersionedLoop(L), NonVersionedLoop(nullptr),
+      Checks(LAInfo.getRuntimePointerChecking()->getChecks()), LAI(LAInfo),
+      LI(LI), DT(DT) {
+  assert(L->getExitBlock() && "No single exit block");
+  assert(L->getLoopPreheader() && "No preheader");
+}
+
 void LoopVersioning::versionLoop(Pass *P) {
   Instruction *FirstCheckInst;
   Instruction *MemRuntimeCheck;