207 // Support for GC barriers emitted during parsing
208 virtual bool has_load_barriers() const { return false; }
209 virtual bool is_gc_barrier_node(Node* node) const { return false; }
210 virtual Node* step_over_gc_barrier(Node* c) const { return c; }
211
212 // Support for macro expanded GC barriers
213 virtual void register_potential_barrier_node(Node* node) const { }
214 virtual void unregister_potential_barrier_node(Node* node) const { }
215 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const { }
216 virtual void enqueue_useful_gc_barrier(PhaseIterGVN* igvn, Node* node) const {}
217 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful, Compile* C) const {}
218 virtual void add_users_to_worklist(Unique_Node_List* worklist) const {}
219
220 // Allow barrier sets to have shared state that is preserved across a compilation unit.
221 // This could for example comprise macro nodes to be expanded during macro expansion.
222 virtual void* create_barrier_state(Arena* comp_arena) const { return NULL; }
223 // If the BarrierSetC2 state has kept macro nodes in its compilation unit state to be
224 // expanded later, then now is the time to do so.
225 virtual bool expand_macro_nodes(PhaseMacroExpand* macro) const { return false; }
226 virtual void verify_gc_barriers(bool post_parse) const {}
227 };
228
229 #endif // SHARE_GC_SHARED_C2_BARRIERSETC2_HPP
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207 // Support for GC barriers emitted during parsing
208 virtual bool has_load_barriers() const { return false; }
209 virtual bool is_gc_barrier_node(Node* node) const { return false; }
210 virtual Node* step_over_gc_barrier(Node* c) const { return c; }
211
212 // Support for macro expanded GC barriers
213 virtual void register_potential_barrier_node(Node* node) const { }
214 virtual void unregister_potential_barrier_node(Node* node) const { }
215 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const { }
216 virtual void enqueue_useful_gc_barrier(PhaseIterGVN* igvn, Node* node) const {}
217 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful, Compile* C) const {}
218 virtual void add_users_to_worklist(Unique_Node_List* worklist) const {}
219
220 // Allow barrier sets to have shared state that is preserved across a compilation unit.
221 // This could for example comprise macro nodes to be expanded during macro expansion.
222 virtual void* create_barrier_state(Arena* comp_arena) const { return NULL; }
223 // If the BarrierSetC2 state has kept macro nodes in its compilation unit state to be
224 // expanded later, then now is the time to do so.
225 virtual bool expand_macro_nodes(PhaseMacroExpand* macro) const { return false; }
226 virtual void verify_gc_barriers(bool post_parse) const {}
227
228 virtual bool flatten_gc_alias_type(const TypePtr*& adr_type) const { return false; }
229 #ifdef ASSERT
230 virtual bool verify_gc_alias_type(const TypePtr* adr_type, int offset) const { return false; }
231 #endif
232 };
233
234 #endif // SHARE_GC_SHARED_C2_BARRIERSETC2_HPP
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