| /* |
| * Copyright (c) 2018, Red Hat, Inc. All rights reserved. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP |
| #define SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP |
| |
| #include "gc/shared/c2/barrierSetC2.hpp" |
| #include "gc/shenandoah/c2/shenandoahSupport.hpp" |
| #include "utilities/growableArray.hpp" |
| |
| class ShenandoahBarrierSetC2State : public ResourceObj { |
| private: |
| GrowableArray<ShenandoahIUBarrierNode*>* _iu_barriers; |
| GrowableArray<ShenandoahLoadReferenceBarrierNode*>* _load_reference_barriers; |
| |
| public: |
| ShenandoahBarrierSetC2State(Arena* comp_arena); |
| |
| int iu_barriers_count() const; |
| ShenandoahIUBarrierNode* iu_barrier(int idx) const; |
| void add_iu_barrier(ShenandoahIUBarrierNode* n); |
| void remove_iu_barrier(ShenandoahIUBarrierNode * n); |
| |
| int load_reference_barriers_count() const; |
| ShenandoahLoadReferenceBarrierNode* load_reference_barrier(int idx) const; |
| void add_load_reference_barrier(ShenandoahLoadReferenceBarrierNode* n); |
| void remove_load_reference_barrier(ShenandoahLoadReferenceBarrierNode * n); |
| }; |
| |
| class ShenandoahBarrierSetC2 : public BarrierSetC2 { |
| private: |
| void shenandoah_eliminate_wb_pre(Node* call, PhaseIterGVN* igvn) const; |
| |
| bool satb_can_remove_pre_barrier(GraphKit* kit, PhaseTransform* phase, Node* adr, |
| BasicType bt, uint adr_idx) const; |
| void satb_write_barrier_pre(GraphKit* kit, bool do_load, |
| Node* obj, |
| Node* adr, |
| uint alias_idx, |
| Node* val, |
| const TypeOopPtr* val_type, |
| Node* pre_val, |
| BasicType bt) const; |
| |
| void shenandoah_write_barrier_pre(GraphKit* kit, |
| bool do_load, |
| Node* obj, |
| Node* adr, |
| uint alias_idx, |
| Node* val, |
| const TypeOopPtr* val_type, |
| Node* pre_val, |
| BasicType bt) const; |
| |
| Node* shenandoah_iu_barrier(GraphKit* kit, Node* obj) const; |
| |
| void insert_pre_barrier(GraphKit* kit, Node* base_oop, Node* offset, |
| Node* pre_val, bool need_mem_bar) const; |
| |
| static bool clone_needs_barrier(Node* src, PhaseGVN& gvn); |
| |
| protected: |
| virtual Node* load_at_resolved(C2Access& access, const Type* val_type) const; |
| virtual Node* store_at_resolved(C2Access& access, C2AccessValue& val) const; |
| virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicAccess& access, Node* expected_val, |
| Node* new_val, const Type* val_type) const; |
| virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicAccess& access, Node* expected_val, |
| Node* new_val, const Type* value_type) const; |
| virtual Node* atomic_xchg_at_resolved(C2AtomicAccess& access, Node* new_val, const Type* val_type) const; |
| |
| public: |
| static ShenandoahBarrierSetC2* bsc2(); |
| |
| static bool is_shenandoah_wb_pre_call(Node* call); |
| static bool is_shenandoah_lrb_call(Node* call); |
| static bool is_shenandoah_marking_if(PhaseTransform *phase, Node* n); |
| static bool is_shenandoah_state_load(Node* n); |
| static bool has_only_shenandoah_wb_pre_uses(Node* n); |
| |
| ShenandoahBarrierSetC2State* state() const; |
| |
| static const TypeFunc* write_ref_field_pre_entry_Type(); |
| static const TypeFunc* shenandoah_clone_barrier_Type(); |
| static const TypeFunc* shenandoah_load_reference_barrier_Type(); |
| virtual bool has_load_barriers() const { return true; } |
| |
| // This is the entry-point for the backend to perform accesses through the Access API. |
| virtual void clone_at_expansion(PhaseMacroExpand* phase, ArrayCopyNode* ac) const; |
| |
| // These are general helper methods used by C2 |
| virtual bool array_copy_requires_gc_barriers(BasicType type) const; |
| |
| // Support for GC barriers emitted during parsing |
| virtual bool is_gc_barrier_node(Node* node) const; |
| virtual Node* step_over_gc_barrier(Node* c) const; |
| virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const; |
| virtual bool optimize_loops(PhaseIdealLoop* phase, LoopOptsMode mode, VectorSet& visited, Node_Stack& nstack, Node_List& worklist) const; |
| virtual bool strip_mined_loops_expanded(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; } |
| virtual bool is_gc_specific_loop_opts_pass(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; } |
| |
| // Support for macro expanded GC barriers |
| virtual void register_potential_barrier_node(Node* node) const; |
| virtual void unregister_potential_barrier_node(Node* node) const; |
| virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const; |
| virtual void enqueue_useful_gc_barrier(Unique_Node_List &worklist, Node* node) const; |
| virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful) const; |
| virtual void add_users_to_worklist(Unique_Node_List* worklist) const; |
| |
| // Allow barrier sets to have shared state that is preserved across a compilation unit. |
| // This could for example comprise macro nodes to be expanded during macro expansion. |
| virtual void* create_barrier_state(Arena* comp_arena) const; |
| // If the BarrierSetC2 state has kept macro nodes in its compilation unit state to be |
| // expanded later, then now is the time to do so. |
| virtual bool expand_macro_nodes(PhaseMacroExpand* macro) const; |
| |
| #ifdef ASSERT |
| virtual void verify_gc_barriers(bool post_parse) const; |
| #endif |
| |
| virtual Node* ideal_node(PhaseGVN* phase, Node* n, bool can_reshape) const; |
| |
| Node* arraycopy_load_reference_barrier(PhaseGVN *phase, Node* v); |
| |
| }; |
| |
| #endif // SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP |
