171
172 virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicAccess& access, Node* expected_val,
173 Node* new_val, const Type* val_type) const;
174 virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicAccess& access, Node* expected_val,
175 Node* new_val, const Type* value_type) const;
176 virtual Node* atomic_xchg_at_resolved(C2AtomicAccess& access, Node* new_val, const Type* val_type) const;
177 virtual Node* atomic_add_at_resolved(C2AtomicAccess& access, Node* new_val, const Type* val_type) const;
178
179 public:
180 // This is the entry-point for the backend to perform accesses through the Access API.
181 virtual Node* store_at(C2Access& access, C2AccessValue& val) const;
182 virtual Node* load_at(C2Access& access, const Type* val_type) const;
183
184 virtual Node* atomic_cmpxchg_val_at(C2AtomicAccess& access, Node* expected_val,
185 Node* new_val, const Type* val_type) const;
186 virtual Node* atomic_cmpxchg_bool_at(C2AtomicAccess& access, Node* expected_val,
187 Node* new_val, const Type* val_type) const;
188 virtual Node* atomic_xchg_at(C2AtomicAccess& access, Node* new_val, const Type* value_type) const;
189 virtual Node* atomic_add_at(C2AtomicAccess& access, Node* new_val, const Type* value_type) const;
190
191 virtual void clone(GraphKit* kit, Node* src, Node* dst, Node* size, bool is_array) const;
192
193 // These are general helper methods used by C2
194 virtual bool array_copy_requires_gc_barriers(BasicType type) const { return false; }
195
196 // Support for GC barriers emitted during parsing
197 virtual bool has_load_barriers() const { return false; }
198 virtual bool is_gc_barrier_node(Node* node) const { return false; }
199 virtual Node* step_over_gc_barrier(Node* c) const { return c; }
200
201 // Support for macro expanded GC barriers
202 virtual void register_potential_barrier_node(Node* node) const { }
203 virtual void unregister_potential_barrier_node(Node* node) const { }
204 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const { }
205 virtual void enqueue_useful_gc_barrier(Unique_Node_List &worklist, Node* node) const {}
206 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful) const {}
207 virtual void add_users_to_worklist(Unique_Node_List* worklist) const {}
208
209 // Allow barrier sets to have shared state that is preserved across a compilation unit.
210 // This could for example comprise macro nodes to be expanded during macro expansion.
211 virtual void* create_barrier_state(Arena* comp_arena) const { return NULL; }
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171
172 virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicAccess& access, Node* expected_val,
173 Node* new_val, const Type* val_type) const;
174 virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicAccess& access, Node* expected_val,
175 Node* new_val, const Type* value_type) const;
176 virtual Node* atomic_xchg_at_resolved(C2AtomicAccess& access, Node* new_val, const Type* val_type) const;
177 virtual Node* atomic_add_at_resolved(C2AtomicAccess& access, Node* new_val, const Type* val_type) const;
178
179 public:
180 // This is the entry-point for the backend to perform accesses through the Access API.
181 virtual Node* store_at(C2Access& access, C2AccessValue& val) const;
182 virtual Node* load_at(C2Access& access, const Type* val_type) const;
183
184 virtual Node* atomic_cmpxchg_val_at(C2AtomicAccess& access, Node* expected_val,
185 Node* new_val, const Type* val_type) const;
186 virtual Node* atomic_cmpxchg_bool_at(C2AtomicAccess& access, Node* expected_val,
187 Node* new_val, const Type* val_type) const;
188 virtual Node* atomic_xchg_at(C2AtomicAccess& access, Node* new_val, const Type* value_type) const;
189 virtual Node* atomic_add_at(C2AtomicAccess& access, Node* new_val, const Type* value_type) const;
190
191 virtual void clone(GraphKit* kit, Node* src_base, Node* dst_base, Node* countx, bool is_array) const;
192
193 // These are general helper methods used by C2
194 virtual bool array_copy_requires_gc_barriers(BasicType type) const { return false; }
195
196 // Support for GC barriers emitted during parsing
197 virtual bool has_load_barriers() const { return false; }
198 virtual bool is_gc_barrier_node(Node* node) const { return false; }
199 virtual Node* step_over_gc_barrier(Node* c) const { return c; }
200
201 // Support for macro expanded GC barriers
202 virtual void register_potential_barrier_node(Node* node) const { }
203 virtual void unregister_potential_barrier_node(Node* node) const { }
204 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const { }
205 virtual void enqueue_useful_gc_barrier(Unique_Node_List &worklist, Node* node) const {}
206 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful) const {}
207 virtual void add_users_to_worklist(Unique_Node_List* worklist) const {}
208
209 // Allow barrier sets to have shared state that is preserved across a compilation unit.
210 // This could for example comprise macro nodes to be expanded during macro expansion.
211 virtual void* create_barrier_state(Arena* comp_arena) const { return NULL; }
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