256 virtual void clone_at_expansion(PhaseMacroExpand* phase, ArrayCopyNode* ac) const;
257
258 // Support for GC barriers emitted during parsing
259 virtual bool has_load_barrier_nodes() const { return false; }
260 virtual bool is_gc_barrier_node(Node* node) const { return false; }
261 virtual Node* step_over_gc_barrier(Node* c) const { return c; }
262
263 // Support for macro expanded GC barriers
264 virtual void register_potential_barrier_node(Node* node) const { }
265 virtual void unregister_potential_barrier_node(Node* node) const { }
266 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const { }
267 virtual void enqueue_useful_gc_barrier(PhaseIterGVN* igvn, Node* node) const {}
268 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful, Compile* C) const {}
269
270 // Allow barrier sets to have shared state that is preserved across a compilation unit.
271 // This could for example comprise macro nodes to be expanded during macro expansion.
272 virtual void* create_barrier_state(Arena* comp_arena) const { return NULL; }
273 // If the BarrierSetC2 state has barrier nodes in its compilation
274 // unit state to be expanded later, then now is the time to do so.
275 virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const { return false; }
276 virtual bool optimize_loops(PhaseIdealLoop* phase, LoopOptsMode mode, VectorSet& visited, Node_Stack& nstack, Node_List& worklist) const { return false; }
277 virtual bool strip_mined_loops_expanded(LoopOptsMode mode) const { return false; }
278 virtual bool is_gc_specific_loop_opts_pass(LoopOptsMode mode) const { return false; }
279
280 enum CompilePhase {
281 BeforeOptimize,
282 BeforeMacroExpand,
283 BeforeCodeGen
284 };
285
286 #ifdef ASSERT
287 virtual void verify_gc_barriers(Compile* compile, CompilePhase phase) const {}
288 #endif
289
290 virtual bool final_graph_reshaping(Compile* compile, Node* n, uint opcode) const { return false; }
291
292 virtual bool escape_add_to_con_graph(ConnectionGraph* conn_graph, PhaseGVN* gvn, Unique_Node_List* delayed_worklist, Node* n, uint opcode) const { return false; }
293 virtual bool escape_add_final_edges(ConnectionGraph* conn_graph, PhaseGVN* gvn, Node* n, uint opcode) const { return false; }
294 virtual bool escape_has_out_with_unsafe_object(Node* n) const { return false; }
295
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256 virtual void clone_at_expansion(PhaseMacroExpand* phase, ArrayCopyNode* ac) const;
257
258 // Support for GC barriers emitted during parsing
259 virtual bool has_load_barrier_nodes() const { return false; }
260 virtual bool is_gc_barrier_node(Node* node) const { return false; }
261 virtual Node* step_over_gc_barrier(Node* c) const { return c; }
262
263 // Support for macro expanded GC barriers
264 virtual void register_potential_barrier_node(Node* node) const { }
265 virtual void unregister_potential_barrier_node(Node* node) const { }
266 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const { }
267 virtual void enqueue_useful_gc_barrier(PhaseIterGVN* igvn, Node* node) const {}
268 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful, Compile* C) const {}
269
270 // Allow barrier sets to have shared state that is preserved across a compilation unit.
271 // This could for example comprise macro nodes to be expanded during macro expansion.
272 virtual void* create_barrier_state(Arena* comp_arena) const { return NULL; }
273 // If the BarrierSetC2 state has barrier nodes in its compilation
274 // unit state to be expanded later, then now is the time to do so.
275 virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const { return false; }
276 virtual bool process_barrier_node(Node* cast_node, PhaseIterGVN& igvn) const { return false; }
277 virtual bool optimize_loops(PhaseIdealLoop* phase, LoopOptsMode mode, VectorSet& visited, Node_Stack& nstack, Node_List& worklist) const { return false; }
278 virtual bool strip_mined_loops_expanded(LoopOptsMode mode) const { return false; }
279 virtual bool is_gc_specific_loop_opts_pass(LoopOptsMode mode) const { return false; }
280
281 enum CompilePhase {
282 BeforeOptimize,
283 BeforeMacroExpand,
284 BeforeCodeGen
285 };
286
287 #ifdef ASSERT
288 virtual void verify_gc_barriers(Compile* compile, CompilePhase phase) const {}
289 #endif
290
291 virtual bool final_graph_reshaping(Compile* compile, Node* n, uint opcode) const { return false; }
292
293 virtual bool escape_add_to_con_graph(ConnectionGraph* conn_graph, PhaseGVN* gvn, Unique_Node_List* delayed_worklist, Node* n, uint opcode) const { return false; }
294 virtual bool escape_add_final_edges(ConnectionGraph* conn_graph, PhaseGVN* gvn, Node* n, uint opcode) const { return false; }
295 virtual bool escape_has_out_with_unsafe_object(Node* n) const { return false; }
296
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