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src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.hpp

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rev 59195 : 8244594: [BACKOUT] 8244523: Shenandoah: Remove null-handling in LRB expansion
rev 59196 : 8244595: [REDO] 8244523: Shenandoah: Remove null-handling in LRB expansion


  86   virtual Node* store_at_resolved(C2Access& access, C2AccessValue& val) const;
  87   virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
  88                                                Node* new_val, const Type* val_type) const;
  89   virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
  90                                                 Node* new_val, const Type* value_type) const;
  91   virtual Node* atomic_xchg_at_resolved(C2AtomicParseAccess& access, Node* new_val, const Type* val_type) const;
  92 
  93 public:
  94   static ShenandoahBarrierSetC2* bsc2();
  95 
  96   static bool is_shenandoah_wb_pre_call(Node* call);
  97   static bool is_shenandoah_lrb_call(Node* call);
  98   static bool is_shenandoah_marking_if(PhaseTransform *phase, Node* n);
  99   static bool is_shenandoah_state_load(Node* n);
 100   static bool has_only_shenandoah_wb_pre_uses(Node* n);
 101 
 102   ShenandoahBarrierSetC2State* state() const;
 103 
 104   static const TypeFunc* write_ref_field_pre_entry_Type();
 105   static const TypeFunc* shenandoah_clone_barrier_Type();
 106   static const TypeFunc* shenandoah_load_reference_barrier_Type();
 107   virtual bool has_load_barrier_nodes() const { return true; }
 108 
 109   // This is the entry-point for the backend to perform accesses through the Access API.
 110   virtual void clone_at_expansion(PhaseMacroExpand* phase, ArrayCopyNode* ac) const;
 111 
 112   // These are general helper methods used by C2
 113   virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const;
 114 
 115   // Support for GC barriers emitted during parsing
 116   virtual bool is_gc_barrier_node(Node* node) const;
 117   virtual Node* step_over_gc_barrier(Node* c) const;
 118   virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const;
 119   virtual bool optimize_loops(PhaseIdealLoop* phase, LoopOptsMode mode, VectorSet& visited, Node_Stack& nstack, Node_List& worklist) const;
 120   virtual bool strip_mined_loops_expanded(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; }
 121   virtual bool is_gc_specific_loop_opts_pass(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; }
 122 
 123   // Support for macro expanded GC barriers
 124   virtual void register_potential_barrier_node(Node* node) const;
 125   virtual void unregister_potential_barrier_node(Node* node) const;
 126   virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;




  86   virtual Node* store_at_resolved(C2Access& access, C2AccessValue& val) const;
  87   virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
  88                                                Node* new_val, const Type* val_type) const;
  89   virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
  90                                                 Node* new_val, const Type* value_type) const;
  91   virtual Node* atomic_xchg_at_resolved(C2AtomicParseAccess& access, Node* new_val, const Type* val_type) const;
  92 
  93 public:
  94   static ShenandoahBarrierSetC2* bsc2();
  95 
  96   static bool is_shenandoah_wb_pre_call(Node* call);
  97   static bool is_shenandoah_lrb_call(Node* call);
  98   static bool is_shenandoah_marking_if(PhaseTransform *phase, Node* n);
  99   static bool is_shenandoah_state_load(Node* n);
 100   static bool has_only_shenandoah_wb_pre_uses(Node* n);
 101 
 102   ShenandoahBarrierSetC2State* state() const;
 103 
 104   static const TypeFunc* write_ref_field_pre_entry_Type();
 105   static const TypeFunc* shenandoah_clone_barrier_Type();
 106   static const TypeFunc* shenandoah_load_reference_barrier_Type(const Type* value_type);
 107   virtual bool has_load_barrier_nodes() const { return true; }
 108 
 109   // This is the entry-point for the backend to perform accesses through the Access API.
 110   virtual void clone_at_expansion(PhaseMacroExpand* phase, ArrayCopyNode* ac) const;
 111 
 112   // These are general helper methods used by C2
 113   virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const;
 114 
 115   // Support for GC barriers emitted during parsing
 116   virtual bool is_gc_barrier_node(Node* node) const;
 117   virtual Node* step_over_gc_barrier(Node* c) const;
 118   virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const;
 119   virtual bool optimize_loops(PhaseIdealLoop* phase, LoopOptsMode mode, VectorSet& visited, Node_Stack& nstack, Node_List& worklist) const;
 120   virtual bool strip_mined_loops_expanded(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; }
 121   virtual bool is_gc_specific_loop_opts_pass(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; }
 122 
 123   // Support for macro expanded GC barriers
 124   virtual void register_potential_barrier_node(Node* node) const;
 125   virtual void unregister_potential_barrier_node(Node* node) const;
 126   virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;


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