1 /*
2 * Copyright (c) 2000, 2023, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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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).
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24
25 #ifndef SHARE_OPTO_CALLGENERATOR_HPP
26 #define SHARE_OPTO_CALLGENERATOR_HPP
27
28 #include "compiler/compileBroker.hpp"
29 #include "opto/callnode.hpp"
30 #include "opto/compile.hpp"
31 #include "opto/type.hpp"
32 #include "runtime/deoptimization.hpp"
33
34 //---------------------------CallGenerator-------------------------------------
35 // The subclasses of this class handle generation of ideal nodes for
36 // call sites and method entry points.
37
38 class CallGenerator : public ArenaObj {
39 private:
40 ciMethod* _method; // The method being called.
41
42 protected:
43 CallGenerator(ciMethod* method) : _method(method) {}
44
45 void do_late_inline_helper();
46
47 virtual bool do_late_inline_check(Compile* C, JVMState* jvms) { ShouldNotReachHere(); return false; }
48 virtual bool is_pure_call() const { ShouldNotReachHere(); return false; }
49
50 public:
51 // Accessors
52 ciMethod* method() const { return _method; }
53
54 // is_inline: At least some code implementing the method is copied here.
55 virtual bool is_inline() const { return false; }
56 // is_intrinsic: There's a method-specific way of generating the inline code.
57 virtual bool is_intrinsic() const { return false; }
58 // is_parse: Bytecodes implementing the specific method are copied here.
59 virtual bool is_parse() const { return false; }
60 // is_virtual: The call uses the receiver type to select or check the method.
61 virtual bool is_virtual() const { return false; }
62 // is_deferred: The decision whether to inline or not is deferred.
63 virtual bool is_deferred() const { return false; }
64 // is_predicated: Uses an explicit check (predicate).
65 virtual bool is_predicated() const { return false; }
66 virtual int predicates_count() const { return 0; }
67 // is_trap: Does not return to the caller. (E.g., uncommon trap.)
68 virtual bool is_trap() const { return false; }
69 // does_virtual_dispatch: Should try inlining as normal method first.
70 virtual bool does_virtual_dispatch() const { return false; }
71
72 // is_late_inline: supports conversion of call into an inline
73 virtual bool is_late_inline() const { return false; }
74 // same but for method handle calls
75 virtual bool is_mh_late_inline() const { return false; }
76 virtual bool is_string_late_inline() const { return false; }
77 virtual bool is_virtual_late_inline() const { return false; }
78
79 // Replace the call with an inline version of the code
80 virtual void do_late_inline() { ShouldNotReachHere(); }
81
82 virtual CallNode* call_node() const { return nullptr; }
83 virtual CallGenerator* with_call_node(CallNode* call) { return this; }
84
85 virtual void set_unique_id(jlong id) { fatal("unique id only for late inlines"); };
86 virtual jlong unique_id() const { fatal("unique id only for late inlines"); return 0; };
87
88 virtual CallGenerator* inline_cg() const { ShouldNotReachHere(); return nullptr; }
89
90 virtual void set_callee_method(ciMethod* callee) { ShouldNotReachHere(); }
91
92 // Note: It is possible for a CG to be both inline and virtual.
93 // (The hashCode intrinsic does a vtable check and an inlined fast path.)
94
95 // Allocate CallGenerators only in Compile arena since some of them are referenced from CallNodes.
96 void* operator new(size_t size) throw() {
97 Compile* C = Compile::current();
98 return ArenaObj::operator new(size, C->comp_arena());
99 }
100
101 // Utilities:
102 const TypeFunc* tf() const;
103
104 // The given jvms has state and arguments for a call to my method.
105 // Edges after jvms->argoff() carry all (pre-popped) argument values.
106 //
107 // Update the map with state and return values (if any) and return it.
108 // The return values (0, 1, or 2) must be pushed on the map's stack,
109 // and the sp of the jvms incremented accordingly.
110 //
111 // The jvms is returned on success. Alternatively, a copy of the
112 // given jvms, suitably updated, may be returned, in which case the
113 // caller should discard the original jvms.
114 //
115 // The non-Parm edges of the returned map will contain updated global state,
116 // and one or two edges before jvms->sp() will carry any return values.
117 // Other map edges may contain locals or monitors, and should not
118 // be changed in meaning.
119 //
120 // If the call traps, the returned map must have a control edge of top.
121 // If the call can throw, the returned map must report has_exceptions().
122 //
123 // If the result is null, it means that this CallGenerator was unable
124 // to handle the given call, and another CallGenerator should be consulted.
125 virtual JVMState* generate(JVMState* jvms) = 0;
126
127 // How to generate a call site that is inlined:
128 static CallGenerator* for_inline(ciMethod* m, float expected_uses = -1);
129 // How to generate code for an on-stack replacement handler.
130 static CallGenerator* for_osr(ciMethod* m, int osr_bci);
131
132 // How to generate vanilla out-of-line call sites:
133 static CallGenerator* for_direct_call(ciMethod* m, bool separate_io_projs = false); // static, special
134 static CallGenerator* for_virtual_call(ciMethod* m, int vtable_index); // virtual, interface
135
136 static CallGenerator* for_method_handle_call( JVMState* jvms, ciMethod* caller, ciMethod* callee, bool allow_inline);
137 static CallGenerator* for_method_handle_inline(JVMState* jvms, ciMethod* caller, ciMethod* callee, bool allow_inline, bool& input_not_const);
138
139 // How to generate a replace a direct call with an inline version
140 static CallGenerator* for_late_inline(ciMethod* m, CallGenerator* inline_cg);
141 static CallGenerator* for_mh_late_inline(ciMethod* caller, ciMethod* callee, bool input_not_const);
142 static CallGenerator* for_string_late_inline(ciMethod* m, CallGenerator* inline_cg);
143 static CallGenerator* for_boxing_late_inline(ciMethod* m, CallGenerator* inline_cg);
144 static CallGenerator* for_vector_reboxing_late_inline(ciMethod* m, CallGenerator* inline_cg);
145 static CallGenerator* for_late_inline_virtual(ciMethod* m, int vtable_index, float expected_uses);
146
147 // How to make a call that optimistically assumes a receiver type:
148 static CallGenerator* for_predicted_call(ciKlass* predicted_receiver,
149 CallGenerator* if_missed,
150 CallGenerator* if_hit,
151 float hit_prob);
152
153 static CallGenerator* for_guarded_call(ciKlass* predicted_receiver,
154 CallGenerator* if_missed,
155 CallGenerator* if_hit);
156
157 // How to make a call that optimistically assumes a MethodHandle target:
158 static CallGenerator* for_predicted_dynamic_call(ciMethodHandle* predicted_method_handle,
159 CallGenerator* if_missed,
160 CallGenerator* if_hit,
161 float hit_prob);
162
163 // How to make a call that gives up and goes back to the interpreter:
164 static CallGenerator* for_uncommon_trap(ciMethod* m,
165 Deoptimization::DeoptReason reason,
166 Deoptimization::DeoptAction action);
167
168 // Registry for intrinsics:
169 static CallGenerator* for_intrinsic(ciMethod* m);
170 static void register_intrinsic(ciMethod* m, CallGenerator* cg);
171 static CallGenerator* for_predicated_intrinsic(CallGenerator* intrinsic,
172 CallGenerator* cg);
173 virtual Node* generate_predicate(JVMState* jvms, int predicate) { return nullptr; };
174
175 virtual void print_inlining_late(InliningResult result, const char* msg) { ShouldNotReachHere(); }
176
177 static void print_inlining(Compile* C, ciMethod* callee, int inline_level, int bci, const char* msg) {
178 print_inlining_impl(C, callee, inline_level, bci, InliningResult::SUCCESS, msg);
179 }
180
181 static void print_inlining_failure(Compile* C, ciMethod* callee, int inline_level, int bci, const char* msg) {
182 print_inlining_impl(C, callee, inline_level, bci, InliningResult::FAILURE, msg);
183 C->log_inline_failure(msg);
184 }
185
186 static bool is_inlined_method_handle_intrinsic(JVMState* jvms, ciMethod* m);
187 static bool is_inlined_method_handle_intrinsic(ciMethod* caller, int bci, ciMethod* m);
188 static bool is_inlined_method_handle_intrinsic(ciMethod* symbolic_info, ciMethod* m);
189
190 private:
191 static void print_inlining_impl(Compile* C, ciMethod* callee, int inline_level, int bci,
192 InliningResult result, const char* msg) {
193 if (C->print_inlining()) {
194 C->print_inlining(callee, inline_level, bci, result, msg);
195 }
196 }
197 };
198
199
200 //------------------------InlineCallGenerator----------------------------------
201 class InlineCallGenerator : public CallGenerator {
202 protected:
203 InlineCallGenerator(ciMethod* method) : CallGenerator(method) {}
204
205 public:
206 virtual bool is_inline() const { return true; }
207 };
208
209 #endif // SHARE_OPTO_CALLGENERATOR_HPP