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src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.hpp

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rev 58543 : 8241605: Shenandoah: More aggressive reference discovery

@@ -56,12 +56,12 @@
   static bool is_heap_state_test(Node* iff, int mask);
   static bool has_safepoint_between(Node* start, Node* stop, PhaseIdealLoop *phase);
   static Node* find_bottom_mem(Node* ctrl, PhaseIdealLoop* phase);
   static void follow_barrier_uses(Node* n, Node* ctrl, Unique_Node_List& uses, PhaseIdealLoop* phase);
   static void test_null(Node*& ctrl, Node* val, Node*& null_ctrl, PhaseIdealLoop* phase);
-  static void test_heap_stable(Node*& ctrl, Node* raw_mem, Node*& heap_stable_ctrl,
-                               PhaseIdealLoop* phase);
+  static void test_heap_state(Node*& ctrl, Node* raw_mem, Node*& heap_stable_ctrl,
+                              PhaseIdealLoop* phase, int flags);
   static void call_lrb_stub(Node*& ctrl, Node*& val, Node* load_addr, Node*& result_mem, Node* raw_mem, bool is_native, PhaseIdealLoop* phase);
   static Node* clone_null_check(Node*& c, Node* val, Node* unc_ctrl, PhaseIdealLoop* phase);
   static void fix_null_check(Node* unc, Node* unc_ctrl, Node* new_unc_ctrl, Unique_Node_List& uses,
                              PhaseIdealLoop* phase);
   static void in_cset_fast_test(Node*& ctrl, Node*& not_cset_ctrl, Node* val, Node* raw_mem, PhaseIdealLoop* phase);

@@ -95,10 +95,12 @@
   const Type *bottom_type() const;
   const Type* Value(PhaseGVN* phase) const;
   Node* Identity(PhaseGVN* phase);
 
   int Opcode() const;
+  bool can_eliminate(PhaseIdealLoop* phase);
+  bool is_redundant();
 
 private:
   enum { Needed, NotNeeded, MaybeNeeded };
 
   static int needed(Node* n);
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