91
92 public:
93 static ShenandoahBarrierSetC2* bsc2();
94
95 static bool is_shenandoah_wb_pre_call(Node* call);
96 static bool is_shenandoah_wb_call(Node* call);
97 static bool is_shenandoah_marking_if(PhaseTransform *phase, Node* n);
98 static bool is_shenandoah_state_load(Node* n);
99 static bool has_only_shenandoah_wb_pre_uses(Node* n);
100
101 ShenandoahBarrierSetC2State* state() const;
102
103 static const TypeFunc* write_ref_field_pre_entry_Type();
104 static const TypeFunc* shenandoah_clone_barrier_Type();
105 static const TypeFunc* shenandoah_write_barrier_Type();
106 virtual bool has_load_barriers() const { return true; }
107
108 // This is the entry-point for the backend to perform accesses through the Access API.
109 virtual void clone(GraphKit* kit, Node* src, Node* dst, Node* size, bool is_array) const;
110
111 virtual Node* obj_allocate(PhaseMacroExpand* macro, Node* ctrl, Node* mem, Node* toobig_false, Node* size_in_bytes,
112 Node*& i_o, Node*& needgc_ctrl,
113 Node*& fast_oop_ctrl, Node*& fast_oop_rawmem,
114 intx prefetch_lines) const;
115
116 // These are general helper methods used by C2
117 virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const;
118 virtual void clone_barrier_at_expansion(ArrayCopyNode* ac, Node* call, PhaseIterGVN& igvn) const;
119
120 // Support for GC barriers emitted during parsing
121 virtual bool is_gc_barrier_node(Node* node) const;
122 virtual Node* step_over_gc_barrier(Node* c) const;
123 virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const;
124 virtual bool optimize_loops(PhaseIdealLoop* phase, LoopOptsMode mode, VectorSet& visited, Node_Stack& nstack, Node_List& worklist) const;
125 virtual bool strip_mined_loops_expanded(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; }
126 virtual bool is_gc_specific_loop_opts_pass(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; }
127
128 // Support for macro expanded GC barriers
129 virtual void register_potential_barrier_node(Node* node) const;
130 virtual void unregister_potential_barrier_node(Node* node) const;
131 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;
132 virtual void enqueue_useful_gc_barrier(PhaseIterGVN* igvn, Node* node) const;
133 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful, Compile* C) const;
134 virtual void add_users_to_worklist(Unique_Node_List* worklist) const;
135
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91
92 public:
93 static ShenandoahBarrierSetC2* bsc2();
94
95 static bool is_shenandoah_wb_pre_call(Node* call);
96 static bool is_shenandoah_wb_call(Node* call);
97 static bool is_shenandoah_marking_if(PhaseTransform *phase, Node* n);
98 static bool is_shenandoah_state_load(Node* n);
99 static bool has_only_shenandoah_wb_pre_uses(Node* n);
100
101 ShenandoahBarrierSetC2State* state() const;
102
103 static const TypeFunc* write_ref_field_pre_entry_Type();
104 static const TypeFunc* shenandoah_clone_barrier_Type();
105 static const TypeFunc* shenandoah_write_barrier_Type();
106 virtual bool has_load_barriers() const { return true; }
107
108 // This is the entry-point for the backend to perform accesses through the Access API.
109 virtual void clone(GraphKit* kit, Node* src, Node* dst, Node* size, bool is_array) const;
110
111 // These are general helper methods used by C2
112 virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const;
113 virtual void clone_barrier_at_expansion(ArrayCopyNode* ac, Node* call, PhaseIterGVN& igvn) 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;
127 virtual void enqueue_useful_gc_barrier(PhaseIterGVN* igvn, Node* node) const;
128 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful, Compile* C) const;
129 virtual void add_users_to_worklist(Unique_Node_List* worklist) const;
130
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