src/share/vm/opto/superword.cpp

*** 471,480 ****
--- 471,486 ----
  
  //------------------------------stmts_can_pack---------------------------
  // Can s1 and s2 be in a pack with s1 immediately preceding s2 and
  // s1 aligned at "align"
  bool SuperWord::stmts_can_pack(Node* s1, Node* s2, int align) {
+ 
+   // Do not use superword for non-primitives
+   if((s1->is_Mem() && !is_java_primitive(s1->as_Mem()->memory_type())) ||
+      (s2->is_Mem() && !is_java_primitive(s2->as_Mem()->memory_type())))
+     return false;
+ 
    if (isomorphic(s1, s2)) {
      if (independent(s1, s2)) {
        if (!exists_at(s1, 0) && !exists_at(s2, 1)) {
          if (!s1->is_Mem() || are_adjacent_refs(s1, s2)) {
            int s1_align = alignment(s1);