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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,