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

@@ -1615,10 +1615,13 @@
   }
 
   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());