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
136 // Allow barrier sets to have shared state that is preserved across a compilation unit.
137 // This could for example comprise macro nodes to be expanded during macro expansion.
138 virtual void* create_barrier_state(Arena* comp_arena) const;
139 // If the BarrierSetC2 state has kept macro nodes in its compilation unit state to be
140 // expanded later, then now is the time to do so.
141 virtual bool expand_macro_nodes(PhaseMacroExpand* macro) const;
142
143 #ifdef ASSERT
144 virtual void verify_gc_barriers(Compile* compile, CompilePhase phase) const;
145 #endif
146
147 virtual Node* ideal_node(PhaseGVN* phase, Node* n, bool can_reshape) const;
148 virtual bool final_graph_reshaping(Compile* compile, Node* n, uint opcode) const;
149
150 virtual bool escape_add_to_con_graph(ConnectionGraph* conn_graph, PhaseGVN* gvn, Unique_Node_List* delayed_worklist, Node* n, uint opcode) const;
151 virtual bool escape_add_final_edges(ConnectionGraph* conn_graph, PhaseGVN* gvn, Node* n, uint opcode) const;
152 virtual bool escape_has_out_with_unsafe_object(Node* n) const;
153 virtual bool escape_is_barrier_node(Node* n) const;
154
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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
135 // Allow barrier sets to have shared state that is preserved across a compilation unit.
136 // This could for example comprise macro nodes to be expanded during macro expansion.
137 virtual void* create_barrier_state(Arena* comp_arena) const;
138 // If the BarrierSetC2 state has kept macro nodes in its compilation unit state to be
139 // expanded later, then now is the time to do so.
140 virtual bool expand_macro_nodes(PhaseMacroExpand* macro) const;
141
142 #ifdef ASSERT
143 virtual void verify_gc_barriers(Compile* compile, CompilePhase phase) const;
144 #endif
145
146 virtual Node* ideal_node(PhaseGVN* phase, Node* n, bool can_reshape) const;
147 virtual bool final_graph_reshaping(Compile* compile, Node* n, uint opcode) const;
148
149 virtual bool escape_add_to_con_graph(ConnectionGraph* conn_graph, PhaseGVN* gvn, Unique_Node_List* delayed_worklist, Node* n, uint opcode) const;
150 virtual bool escape_add_final_edges(ConnectionGraph* conn_graph, PhaseGVN* gvn, Node* n, uint opcode) const;
151 virtual bool escape_has_out_with_unsafe_object(Node* n) const;
152 virtual bool escape_is_barrier_node(Node* n) const;
153
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