src/share/vm/c1/c1_LIRGenerator.cpp

rev 8303 : 8079315: UseCondCardMark broken in conjunction with CMS precleaning
Summary: Insert StoreLoad barriers in CondCardMark sequence
Reviewed-by: kvn

*** 1615,1624 ****
--- 1615,1627 ----
    }
  
    LIR_Opr dirty = LIR_OprFact::intConst(CardTableModRefBS::dirty_card_val());
    if (UseCondCardMark) {
      LIR_Opr cur_value = new_register(T_INT);
+     if (UseConcMarkSweepGC) {
+       __ membar_storeload();
+     }
      __ move(card_addr, cur_value);
  
      LabelObj* L_already_dirty = new LabelObj();
      __ cmp(lir_cond_equal, cur_value, dirty);
      __ branch(lir_cond_equal, T_BYTE, L_already_dirty->label());