1 /*
2 * Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
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_G1_C2_G1BARRIERSETC2_HPP
26 #define SHARE_GC_G1_C2_G1BARRIERSETC2_HPP
27
28 #include "gc/shared/c2/cardTableBarrierSetC2.hpp"
29
30 class PhaseTransform;
31 class Type;
32 class TypeFunc;
33
34 const int G1C2BarrierPre = 1;
35 const int G1C2BarrierPost = 2;
36 const int G1C2BarrierPostNotNull = 4;
37
38 class G1BarrierStubC2 : public BarrierStubC2 {
39 public:
40 G1BarrierStubC2(const MachNode* node);
41 virtual void emit_code(MacroAssembler& masm) = 0;
42 };
43
44 class G1PreBarrierStubC2 : public G1BarrierStubC2 {
45 private:
46 Register _obj;
47 Register _pre_val;
48 Register _thread;
49 Register _tmp1;
50 Register _tmp2;
51
52 protected:
53 G1PreBarrierStubC2(const MachNode* node);
54
55 public:
56 static bool needs_barrier(const MachNode* node);
57 static G1PreBarrierStubC2* create(const MachNode* node);
58 void initialize_registers(Register obj, Register pre_val, Register thread, Register tmp1 = noreg, Register tmp2 = noreg);
59 Register obj() const;
60 Register pre_val() const;
61 Register thread() const;
62 Register tmp1() const;
63 Register tmp2() const;
64 virtual void emit_code(MacroAssembler& masm);
65 };
66
67 class G1PostBarrierStubC2 : public G1BarrierStubC2 {
68 private:
69 Register _thread;
70 Register _tmp1;
71 Register _tmp2;
72 Register _tmp3;
73
74 protected:
75 G1PostBarrierStubC2(const MachNode* node);
76
77 public:
78 static bool needs_barrier(const MachNode* node);
79 static G1PostBarrierStubC2* create(const MachNode* node);
80 void initialize_registers(Register thread, Register tmp1 = noreg, Register tmp2 = noreg, Register tmp3 = noreg);
81 Register thread() const;
82 Register tmp1() const;
83 Register tmp2() const;
84 Register tmp3() const;
85 virtual void emit_code(MacroAssembler& masm);
86 };
87
88 class G1BarrierSetC2: public CardTableBarrierSetC2 {
89 protected:
90 bool g1_can_remove_pre_barrier(GraphKit* kit,
91 PhaseValues* phase,
92 Node* adr,
93 BasicType bt,
94 uint adr_idx) const;
95
96 bool g1_can_remove_post_barrier(GraphKit* kit,
97 PhaseValues* phase, Node* store,
98 Node* adr) const;
99
100 int get_store_barrier(C2Access& access) const;
101
102 virtual Node* load_at_resolved(C2Access& access, const Type* val_type) const;
103 virtual Node* store_at_resolved(C2Access& access, C2AccessValue& val) const;
104 virtual Node* atomic_cmpxchg_val_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
105 Node* new_val, const Type* value_type) const;
106 virtual Node* atomic_cmpxchg_bool_at_resolved(C2AtomicParseAccess& access, Node* expected_val,
107 Node* new_val, const Type* value_type) const;
108 virtual Node* atomic_xchg_at_resolved(C2AtomicParseAccess& access, Node* new_val, const Type* value_type) const;
109
110 public:
111 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;
112 virtual void eliminate_gc_barrier_data(Node* node) const;
113 virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const;
114 virtual uint estimated_barrier_size(const Node* node) const;
115 virtual bool can_initialize_object(const StoreNode* store) const;
116 virtual void clone_at_expansion(PhaseMacroExpand* phase,
117 ArrayCopyNode* ac) const;
118 virtual void* create_barrier_state(Arena* comp_arena) const;
119 virtual void emit_stubs(CodeBuffer& cb) const;
120 virtual void late_barrier_analysis() const;
121
122 #ifndef PRODUCT
123 virtual void dump_barrier_data(const MachNode* mach, outputStream* st) const;
124 #endif
125 };
126
127 #endif // SHARE_GC_G1_C2_G1BARRIERSETC2_HPP