14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP
26 #define SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP
27
28 #include "gc/shared/c2/barrierSetC2.hpp"
29 #include "gc/shenandoah/c2/shenandoahSupport.hpp"
30 #include "utilities/growableArray.hpp"
31
32 class ShenandoahBarrierSetC2State : public ArenaObj {
33 private:
34 GrowableArray<ShenandoahIUBarrierNode*>* _iu_barriers;
35 GrowableArray<ShenandoahLoadReferenceBarrierNode*>* _load_reference_barriers;
36
37 public:
38 ShenandoahBarrierSetC2State(Arena* comp_arena);
39
40 int iu_barriers_count() const;
41 ShenandoahIUBarrierNode* iu_barrier(int idx) const;
42 void add_iu_barrier(ShenandoahIUBarrierNode* n);
43 void remove_iu_barrier(ShenandoahIUBarrierNode * n);
44
45 int load_reference_barriers_count() const;
46 ShenandoahLoadReferenceBarrierNode* load_reference_barrier(int idx) const;
47 void add_load_reference_barrier(ShenandoahLoadReferenceBarrierNode* n);
48 void remove_load_reference_barrier(ShenandoahLoadReferenceBarrierNode * n);
49 };
50
51 class ShenandoahBarrierSetC2 : public BarrierSetC2 {
52 private:
53 void shenandoah_eliminate_wb_pre(Node* call, PhaseIterGVN* igvn) const;
54
55 bool satb_can_remove_pre_barrier(GraphKit* kit, PhaseValues* phase, Node* adr,
56 BasicType bt, uint adr_idx) const;
57 void satb_write_barrier_pre(GraphKit* kit, bool do_load,
58 Node* obj,
59 Node* adr,
60 uint alias_idx,
61 Node* val,
62 const TypeOopPtr* val_type,
63 Node* pre_val,
64 BasicType bt) const;
65
66 void shenandoah_write_barrier_pre(GraphKit* kit,
67 bool do_load,
68 Node* obj,
69 Node* adr,
70 uint alias_idx,
71 Node* val,
72 const TypeOopPtr* val_type,
73 Node* pre_val,
74 BasicType bt) const;
75
76 Node* shenandoah_iu_barrier(GraphKit* kit, Node* obj) const;
77
78 void insert_pre_barrier(GraphKit* kit, Node* base_oop, Node* offset,
79 Node* pre_val, bool need_mem_bar) const;
80
81 static bool clone_needs_barrier(Node* src, PhaseGVN& gvn);
82
83 protected:
84 virtual Node* load_at_resolved(C2Access& access, const Type* val_type) const;
85 virtual Node* store_at_resolved(C2Access& access, C2AccessValue& val) const;
86 virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
87 Node* new_val, const Type* val_type) const;
88 virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
89 Node* new_val, const Type* value_type) const;
90 virtual Node* atomic_xchg_at_resolved(C2AtomicParseAccess& access, Node* new_val, const Type* val_type) const;
91
92 public:
93 static ShenandoahBarrierSetC2* bsc2();
94
95 static bool is_shenandoah_wb_pre_call(Node* call);
96 static bool is_shenandoah_lrb_call(Node* call);
97 static bool is_shenandoah_marking_if(PhaseValues* phase, Node* n);
98 static bool is_shenandoah_state_load(Node* n);
99 static bool has_only_shenandoah_wb_pre_uses(Node* n);
100
101 ShenandoahBarrierSetC2State* state() const;
102
103 static const TypeFunc* write_ref_field_pre_entry_Type();
104 static const TypeFunc* shenandoah_clone_barrier_Type();
105 static const TypeFunc* shenandoah_load_reference_barrier_Type();
106 virtual bool has_load_barrier_nodes() const { return true; }
107
108 // This is the entry-point for the backend to perform accesses through the Access API.
109 virtual void clone_at_expansion(PhaseMacroExpand* phase, ArrayCopyNode* ac) const;
110
111 // These are general helper methods used by C2
112 virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, bool is_clone_instance, ArrayCopyPhase phase) const;
113
114 // Support for GC barriers emitted during parsing
115 virtual bool is_gc_pre_barrier_node(Node* node) const;
116 virtual bool is_gc_barrier_node(Node* node) const;
117 virtual Node* step_over_gc_barrier(Node* c) const;
118 virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const;
119 virtual bool optimize_loops(PhaseIdealLoop* phase, LoopOptsMode mode, VectorSet& visited, Node_Stack& nstack, Node_List& worklist) const;
120 virtual bool strip_mined_loops_expanded(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; }
121 virtual bool is_gc_specific_loop_opts_pass(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand || mode == LoopOptsShenandoahPostExpand; }
122
123 // Support for macro expanded GC barriers
124 virtual void register_potential_barrier_node(Node* node) const;
125 virtual void unregister_potential_barrier_node(Node* node) const;
126 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;
127 virtual void enqueue_useful_gc_barrier(PhaseIterGVN* igvn, Node* node) const;
128 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful, Compile* C) const;
129
130 // Allow barrier sets to have shared state that is preserved across a compilation unit.
131 // This could for example comprise macro nodes to be expanded during macro expansion.
132 virtual void* create_barrier_state(Arena* comp_arena) const;
133 // If the BarrierSetC2 state has kept macro nodes in its compilation unit state to be
134 // expanded later, then now is the time to do so.
135 virtual bool expand_macro_nodes(PhaseMacroExpand* macro) const;
136
137 #ifdef ASSERT
138 virtual void verify_gc_barriers(Compile* compile, CompilePhase phase) const;
139 #endif
140
141 virtual Node* ideal_node(PhaseGVN* phase, Node* n, bool can_reshape) const;
|
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP
26 #define SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP
27
28 #include "gc/shared/c2/barrierSetC2.hpp"
29 #include "gc/shenandoah/c2/shenandoahSupport.hpp"
30 #include "utilities/growableArray.hpp"
31
32 class ShenandoahBarrierSetC2State : public ArenaObj {
33 private:
34 GrowableArray<ShenandoahLoadReferenceBarrierNode*>* _load_reference_barriers;
35
36 public:
37 ShenandoahBarrierSetC2State(Arena* comp_arena);
38
39 int load_reference_barriers_count() const;
40 ShenandoahLoadReferenceBarrierNode* load_reference_barrier(int idx) const;
41 void add_load_reference_barrier(ShenandoahLoadReferenceBarrierNode* n);
42 void remove_load_reference_barrier(ShenandoahLoadReferenceBarrierNode * n);
43 };
44
45 class ShenandoahBarrierSetC2 : public BarrierSetC2 {
46 private:
47 void shenandoah_eliminate_wb_pre(Node* call, PhaseIterGVN* igvn) const;
48
49 bool satb_can_remove_pre_barrier(GraphKit* kit, PhaseValues* phase, Node* adr,
50 BasicType bt, uint adr_idx) const;
51 void satb_write_barrier_pre(GraphKit* kit, bool do_load,
52 Node* obj,
53 Node* adr,
54 uint alias_idx,
55 Node* val,
56 const TypeOopPtr* val_type,
57 Node* pre_val,
58 BasicType bt) const;
59
60 void shenandoah_write_barrier_pre(GraphKit* kit,
61 bool do_load,
62 Node* obj,
63 Node* adr,
64 uint alias_idx,
65 Node* val,
66 const TypeOopPtr* val_type,
67 Node* pre_val,
68 BasicType bt) const;
69
70 void post_barrier(GraphKit* kit,
71 Node* ctl,
72 Node* store,
73 Node* obj,
74 Node* adr,
75 uint adr_idx,
76 Node* val,
77 BasicType bt,
78 bool use_precise) const;
79
80 void insert_pre_barrier(GraphKit* kit, Node* base_oop, Node* offset,
81 Node* pre_val, bool need_mem_bar) const;
82
83 static bool clone_needs_barrier(Node* src, PhaseGVN& gvn);
84
85 protected:
86 virtual Node* load_at_resolved(C2Access& access, const Type* val_type) const;
87 virtual Node* store_at_resolved(C2Access& access, C2AccessValue& val) const;
88 virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
89 Node* new_val, const Type* val_type) const;
90 virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
91 Node* new_val, const Type* value_type) const;
92 virtual Node* atomic_xchg_at_resolved(C2AtomicParseAccess& access, Node* new_val, const Type* val_type) const;
93
94 public:
95 static ShenandoahBarrierSetC2* bsc2();
96
97 static bool is_shenandoah_wb_pre_call(Node* call);
98 static bool is_shenandoah_clone_call(Node* call);
99 static bool is_shenandoah_lrb_call(Node* call);
100 static bool is_shenandoah_marking_if(PhaseValues* phase, Node* n);
101 static bool is_shenandoah_state_load(Node* n);
102 static bool has_only_shenandoah_wb_pre_uses(Node* n);
103
104 ShenandoahBarrierSetC2State* state() const;
105
106 static const TypeFunc* write_ref_field_pre_entry_Type();
107 static const TypeFunc* shenandoah_clone_barrier_Type();
108 static const TypeFunc* shenandoah_load_reference_barrier_Type();
109 virtual bool has_load_barrier_nodes() const { return true; }
110
111 // This is the entry-point for the backend to perform accesses through the Access API.
112 virtual void clone_at_expansion(PhaseMacroExpand* phase, ArrayCopyNode* ac) const;
113
114 // These are general helper methods used by C2
115 virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, bool is_clone_instance, ArrayCopyPhase phase) const;
116
117 // Support for GC barriers emitted during parsing
118 virtual bool is_gc_pre_barrier_node(Node* node) const;
119 virtual bool is_gc_barrier_node(Node* node) const;
120 virtual Node* step_over_gc_barrier(Node* c) const;
121 virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const;
122 virtual bool optimize_loops(PhaseIdealLoop* phase, LoopOptsMode mode, VectorSet& visited, Node_Stack& nstack, Node_List& worklist) const;
123 virtual bool strip_mined_loops_expanded(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand; }
124 virtual bool is_gc_specific_loop_opts_pass(LoopOptsMode mode) const { return mode == LoopOptsShenandoahExpand; }
125
126 // Support for macro expanded GC barriers
127 virtual void register_potential_barrier_node(Node* node) const;
128 virtual void unregister_potential_barrier_node(Node* node) const;
129 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;
130 virtual void enqueue_useful_gc_barrier(PhaseIterGVN* igvn, Node* node) const;
131 virtual void eliminate_useless_gc_barriers(Unique_Node_List &useful, Compile* C) const;
132
133 // Allow barrier sets to have shared state that is preserved across a compilation unit.
134 // This could for example comprise macro nodes to be expanded during macro expansion.
135 virtual void* create_barrier_state(Arena* comp_arena) const;
136 // If the BarrierSetC2 state has kept macro nodes in its compilation unit state to be
137 // expanded later, then now is the time to do so.
138 virtual bool expand_macro_nodes(PhaseMacroExpand* macro) const;
139
140 #ifdef ASSERT
141 virtual void verify_gc_barriers(Compile* compile, CompilePhase phase) const;
142 #endif
143
144 virtual Node* ideal_node(PhaseGVN* phase, Node* n, bool can_reshape) const;
|