diff --git a/llvm/include/llvm/Analysis/LoopInfo.h b/llvm/include/llvm/Analysis/LoopInfo.h
--- a/llvm/include/llvm/Analysis/LoopInfo.h
+++ b/llvm/include/llvm/Analysis/LoopInfo.h
@@ -872,6 +872,8 @@
   /// unrolling pass is run more than once (which it generally is).
   void setLoopAlreadyUnrolled();
 
+  void setLoopCanBeUnrolled();
+
   /// Add llvm.loop.mustprogress to this loop's loop id metadata.
   void setLoopMustProgress();
 
diff --git a/llvm/lib/Analysis/LoopInfo.cpp b/llvm/lib/Analysis/LoopInfo.cpp
--- a/llvm/lib/Analysis/LoopInfo.cpp
+++ b/llvm/lib/Analysis/LoopInfo.cpp
@@ -545,6 +545,17 @@
   setLoopID(NewLoopID);
 }
 
+void Loop::setLoopCanBeUnrolled() {
+  LLVMContext &Context = getHeader()->getContext();
+
+  MDNode *EnableUnrollMD =
+      MDNode::get(Context, MDString::get(Context, "llvm.loop.unroll.enable"));
+  MDNode *LoopID = getLoopID();
+  MDNode *NewLoopID = makePostTransformationMetadata(
+      Context, LoopID, {"llvm.loop.unroll."}, {EnableUnrollMD});
+  setLoopID(NewLoopID);
+}
+
 void Loop::setLoopMustProgress() {
   LLVMContext &Context = getHeader()->getContext();
 
diff --git a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
--- a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
@@ -1330,6 +1330,7 @@
                                         LLVMLoopUnrollFollowupRemainder});
     if (RemainderLoopID)
       RemainderLoop->setLoopID(*RemainderLoopID);
+    RemainderLoop->setLoopCanBeUnrolled();
   }
 
   if (UnrollResult != LoopUnrollResult::FullyUnrolled) {