/* * 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* _enqueue_barriers; GrowableArray* _load_reference_barriers; public: ShenandoahBarrierSetC2State(Arena* comp_arena); int enqueue_barriers_count() const; ShenandoahEnqueueBarrierNode* enqueue_barrier(int idx) const; void add_enqueue_barrier(ShenandoahEnqueueBarrierNode* n); void remove_enqueue_barrier(ShenandoahEnqueueBarrierNode * 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_enqueue_barrier(GraphKit* kit, Node* val) const; Node* shenandoah_storeval_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_postbarrier(ArrayCopyNode *ac, PhaseIterGVN& igvn); 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(GraphKit* kit, Node* src, Node* dst, Node* size, bool is_array) const; 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; }; #endif // SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP