src/share/vm/opto/graphKit.cpp

rev 5363 : imported patch filtering.diff
rev 5364 : [mq]: graphkit-comment

*** 3770,3779 ****
--- 3770,3780 ----
          // load the original value of the card
          Node* card_val = __ load(__ ctrl(), card_adr, TypeInt::INT, T_BYTE, Compile::AliasIdxRaw);
  
          __ if_then(card_val, BoolTest::ne, young_card); {
            sync_kit(ideal);
+           // Use Op_MemBarVolatile to achieve the effect of a StoreLoad barrier.
            insert_mem_bar(Op_MemBarVolatile, oop_store);
            __ sync_kit(this);
  
            Node* card_val_reload = __ load(__ ctrl(), card_adr, TypeInt::INT, T_BYTE, Compile::AliasIdxRaw);
            __ if_then(card_val_reload, BoolTest::ne, dirty_card); {