src/hotspot/share/opto/loopTransform.cpp

*** 829,838 ****
--- 829,847 ----
        (future_unroll_cnt - 1) * (100 / LoopPercentProfileLimit) > cl->profile_trip_cnt() &&
        1.2 * cl->node_count_before_unroll() < (double)_body.size()) {
      return false;
    }
  
+   // Protect against over-unrolling with SuperWordLoopUnrollAnalysis.
+   if (SuperWordLoopUnrollAnalysis &&
+       !cl->is_vectorized_loop() &&
+       future_unroll_cnt > LoopUnrollMin &&
+       cl->profile_trip_cnt() != COUNT_UNKNOWN &&
+       (uint)(2 * cl->unrolled_count()) > cl->trip_count()) {
+     return false;
+   }
+ 
    Node *init_n = cl->init_trip();
    Node *limit_n = cl->limit();
    int stride_con = cl->stride_con();
    if (limit_n == NULL) return false; // We will dereference it below.