src/share/vm/opto/graphKit.hpp

rev 5127 : 8023597: Optimize G1 barriers code for unsafe load_store
Summary: Avoid loading old values in G1 pre-barriers for inlined unsafe load_store nodes.

*** 693,702 ****
--- 693,705 ----
  
    // vanilla/CMS post barrier
    void write_barrier_post(Node *store, Node* obj,
                            Node* adr,  uint adr_idx, Node* val, bool use_precise);
  
+   // allow reordering of pre-barrier with oop store and/or post-barrier
+   bool can_move_pre_barrier() const;
+ 
    // G1 pre/post barriers
    void g1_write_barrier_pre(bool do_load,
                              Node* obj,
                              Node* adr,
                              uint alias_idx,