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