9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
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_barrier_pre_Type();
107 static const TypeFunc* clone_barrier_Type();
108 static const TypeFunc* 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;
145 virtual bool final_graph_reshaping(Compile* compile, Node* n, uint opcode, Unique_Node_List& dead_nodes) const;
146
147 virtual bool escape_add_to_con_graph(ConnectionGraph* conn_graph, PhaseGVN* gvn, Unique_Node_List* delayed_worklist, Node* n, uint opcode) const;
148 virtual bool escape_add_final_edges(ConnectionGraph* conn_graph, PhaseGVN* gvn, Node* n, uint opcode) const;
149 virtual bool escape_has_out_with_unsafe_object(Node* n) const;
150
151 virtual bool matcher_find_shared_post_visit(Matcher* matcher, Node* n, uint opcode) const;
152 virtual bool matcher_is_store_load_barrier(Node* x, uint xop) const;
153 };
154
155 #endif // SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
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 "shenandoahBarrierSetC2.hpp"
30 #include "utilities/growableArray.hpp"
31
32 static const uint8_t ShenandoahBarrierStrong = 1 << 0;
33 static const uint8_t ShenandoahBarrierWeak = 1 << 1;
34 static const uint8_t ShenandoahBarrierPhantom = 1 << 2;
35 static const uint8_t ShenandoahBarrierNative = 1 << 3;
36 static const uint8_t ShenandoahBarrierElided = 1 << 4;
37 static const uint8_t ShenandoahBarrierSATB = 1 << 5;
38 static const uint8_t ShenandoahBarrierCardMark = 1 << 6;
39 static const uint8_t ShenandoahBarrierCardMarkNotNull = 1 << 7;
40
41 class ShenandoahBarrierStubC2;
42
43 class ShenandoahBarrierSetC2State : public BarrierSetC2State {
44 GrowableArray<ShenandoahBarrierStubC2*>* _stubs;
45 int _stubs_start_offset;
46
47 public:
48 explicit ShenandoahBarrierSetC2State(Arena* comp_arena);
49
50 bool needs_liveness_data(const MachNode* mach) const override;
51 bool needs_livein_data() const override;
52
53 GrowableArray<ShenandoahBarrierStubC2*>* stubs() {
54 return _stubs;
55 }
56
57 void set_stubs_start_offset(int offset) {
58 _stubs_start_offset = offset;
59 }
60
61 int stubs_start_offset() {
62 return _stubs_start_offset;
63 }};
64
65 class ShenandoahBarrierSetC2 : public BarrierSetC2 {
66
67 static bool clone_needs_barrier(Node* src, PhaseGVN& gvn);
68
69 protected:
70 virtual Node* load_at_resolved(C2Access& access, const Type* val_type) const;
71 virtual Node* store_at_resolved(C2Access& access, C2AccessValue& val) const;
72 virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
73 Node* new_val, const Type* val_type) const;
74 virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
75 Node* new_val, const Type* value_type) const;
76 virtual Node* atomic_xchg_at_resolved(C2AtomicParseAccess& access, Node* new_val, const Type* val_type) const;
77
78 public:
79 static ShenandoahBarrierSetC2* bsc2();
80
81 static bool is_shenandoah_clone_call(Node* call);
82
83 ShenandoahBarrierSetC2State* state() const;
84
85 static const TypeFunc* clone_barrier_Type();
86
87 // This is the entry-point for the backend to perform accesses through the Access API.
88 virtual void clone_at_expansion(PhaseMacroExpand* phase, ArrayCopyNode* ac) const;
89
90 // These are general helper methods used by C2
91 virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, bool is_clone_instance, ArrayCopyPhase phase) const;
92
93 // Support for GC barriers emitted during parsing
94 virtual bool is_gc_barrier_node(Node* node) const;
95 virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const;
96
97 // Support for macro expanded GC barriers
98 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;
99 virtual void eliminate_gc_barrier_data(Node* node) const;
100
101 // Allow barrier sets to have shared state that is preserved across a compilation unit.
102 // This could for example comprise macro nodes to be expanded during macro expansion.
103 virtual void* create_barrier_state(Arena* comp_arena) const;
104
105 #ifdef ASSERT
106 virtual void verify_gc_barriers(Compile* compile, CompilePhase phase) const;
107 static void report_verify_failure(bool failed, const char* msg, Node* n);
108 #endif
109
110 int estimate_stub_size() const /* override */;
111 void emit_stubs(CodeBuffer& cb) const /* override */;
112 void late_barrier_analysis() const /* override*/ {
113 compute_liveness_at_stubs();
114 }
115
116 };
117
118 class ShenandoahBarrierStubC2 : public BarrierStubC2 {
119 protected:
120 explicit ShenandoahBarrierStubC2(const MachNode* node) : BarrierStubC2(node) {}
121 void register_stub();
122 public:
123 virtual void emit_code(MacroAssembler& masm) = 0;
124 };
125
126 class ShenandoahLoadRefBarrierStubC2 : public ShenandoahBarrierStubC2 {
127 Register _obj;
128 Register _addr;
129 Register _tmp1;
130 Register _tmp2;
131 Register _tmp3;
132 bool _narrow;
133 ShenandoahLoadRefBarrierStubC2(const MachNode* node, Register obj, Register addr, Register tmp1, Register tmp2, Register tmp3, bool narrow) :
134 ShenandoahBarrierStubC2(node), _obj(obj), _addr(addr), _tmp1(tmp1), _tmp2(tmp2), _tmp3(tmp3), _narrow(narrow) {}
135 public:
136 static bool needs_barrier(const MachNode* node) {
137 return (node->barrier_data() & (ShenandoahBarrierStrong | ShenandoahBarrierWeak | ShenandoahBarrierPhantom | ShenandoahBarrierNative)) != 0;
138 }
139 static ShenandoahLoadRefBarrierStubC2* create(const MachNode* node, Register obj, Register addr, Register tmp1, Register tmp2, Register tmp3, bool narrow);
140 void emit_code(MacroAssembler& masm) override;
141 };
142
143 class ShenandoahSATBBarrierStubC2 : public ShenandoahBarrierStubC2 {
144 Register _addr;
145 Register _preval;
146 Register _tmp;
147 ShenandoahSATBBarrierStubC2(const MachNode* node, Register addr, Register preval, Register tmp) :
148 ShenandoahBarrierStubC2(node), _addr(addr), _preval(preval), _tmp(tmp) {}
149
150 public:
151 static bool needs_barrier(const MachNode* node) {
152 return (node->barrier_data() & ShenandoahBarrierSATB) != 0;
153 }
154 static ShenandoahSATBBarrierStubC2* create(const MachNode* node, Register addr, Register preval, Register tmp = noreg);
155
156 void emit_code(MacroAssembler& masm) override;
157 };
158
159 class ShenandoahCASBarrierSlowStubC2 : public ShenandoahBarrierStubC2 {
160 Register _addr_reg;
161 Address _addr;
162 Register _expected;
163 Register _new_val;
164 Register _result;
165 Register _tmp1;
166 Register _tmp2;
167 bool _cae;
168 bool _acquire;
169 bool _release;
170 bool _weak;
171
172 explicit ShenandoahCASBarrierSlowStubC2(const MachNode* node, Register addr_reg, Address addr, Register expected, Register new_val, Register result, Register tmp1, Register tmp2, bool cae, bool acquire, bool release, bool weak) :
173 ShenandoahBarrierStubC2(node),
174 _addr_reg(addr_reg), _addr(addr), _expected(expected), _new_val(new_val), _result(result), _tmp1(tmp1), _tmp2(tmp2), _cae(cae), _acquire(acquire), _release(release), _weak(weak) {}
175
176 public:
177 static ShenandoahCASBarrierSlowStubC2* create(const MachNode* node, Register addr, Register expected, Register new_val, Register result, Register tmp, bool cae, bool acquire, bool release, bool weak);
178 static ShenandoahCASBarrierSlowStubC2* create(const MachNode* node, Address addr, Register expected, Register new_val, Register result, Register tmp1, Register tmp2, bool cae);
179 void emit_code(MacroAssembler& masm) override;
180 };
181
182 class ShenandoahCASBarrierMidStubC2 : public ShenandoahBarrierStubC2 {
183 ShenandoahCASBarrierSlowStubC2* _slow_stub;
184 Register _expected;
185 Register _result;
186 Register _tmp;
187 bool _cae;
188 ShenandoahCASBarrierMidStubC2(const MachNode* node, ShenandoahCASBarrierSlowStubC2* slow_stub, Register expected, Register result, Register tmp, bool cae) :
189 ShenandoahBarrierStubC2(node), _slow_stub(slow_stub), _expected(expected), _result(result), _tmp(tmp), _cae(cae) {}
190 public:
191 static ShenandoahCASBarrierMidStubC2* create(const MachNode* node, ShenandoahCASBarrierSlowStubC2* slow_stub, Register expected, Register result, Register tmp, bool cae);
192 void emit_code(MacroAssembler& masm) override;
193 };
194
195 #endif // SHARE_GC_SHENANDOAH_C2_SHENANDOAHBARRIERSETC2_HPP
|