diff --git a/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp b/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
--- a/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
+++ b/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
@@ -19,6 +19,7 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Transforms/InstCombine/InstCombiner.h"
 #include "llvm/Transforms/Utils/Local.h"
+#include "llvm/Transforms/Utils/LoopUtils.h"
 
 using namespace llvm;
 
@@ -753,6 +754,11 @@
     UP.AllowExpensiveTripCount = true;
   }
 
+  // Enable unroll and jam for loops forced by user.
+  TransformationMode EnableMode = hasUnrollAndJamTransformation(L);
+  if (EnableMode & TM_ForcedByUser)
+    UP.UnrollAndJam = true;
+
   BaseT::getUnrollingPreferences(L, SE, UP);
 }