src/share/vm/opto/loopnode.cpp

@@ -2315,11 +2315,15 @@
 
   if (ReassociateInvariants) {
     // Reassociate invariants and prep for split_thru_phi
     for (LoopTreeIterator iter(_ltree_root); !iter.done(); iter.next()) {
       IdealLoopTree* lpt = iter.current();
-      if (!lpt->is_counted() || !lpt->is_inner()) continue;
+      bool is_counted = lpt->is_counted();
+      if (!is_counted || !lpt->is_inner()) continue;
+
+      // check for vectorized loops, any reassociation of invariants was already done
+      if (is_counted && lpt->_head->as_CountedLoop()->ignore_slp()) continue;
 
       lpt->reassociate_invariants(this);
 
       // Because RCE opportunities can be masked by split_thru_phi,
       // look for RCE candidates and inhibit split_thru_phi