Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 4530:6c6cb7be1324
bugfix
author | Christian Haeubl <christian.haeubl@oracle.com> |
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date | Wed, 08 Feb 2012 21:13:35 -0800 |
parents | f6f3bb0ee072 |
children | 80ae8033fe01 0f4014d7731b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
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28 #include "compiler/compileBroker.hpp" |
1972 | 29 #include "compiler/compileLog.hpp" |
30 #include "interpreter/linkResolver.hpp" | |
31 #include "oops/objArrayKlass.hpp" | |
32 #include "opto/callGenerator.hpp" | |
33 #include "opto/parse.hpp" | |
34 #include "runtime/handles.inline.hpp" | |
0 | 35 |
36 //============================================================================= | |
37 //------------------------------InlineTree------------------------------------- | |
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38 InlineTree::InlineTree(Compile* c, |
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39 const InlineTree *caller_tree, ciMethod* callee, |
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40 JVMState* caller_jvms, int caller_bci, |
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41 float site_invoke_ratio, int max_inline_level) : |
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42 C(c), |
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43 _caller_jvms(caller_jvms), |
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44 _caller_tree((InlineTree*) caller_tree), |
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45 _method(callee), |
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46 _site_invoke_ratio(site_invoke_ratio), |
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47 _max_inline_level(max_inline_level), |
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48 _count_inline_bcs(method()->code_size_for_inlining()) |
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49 { |
0 | 50 NOT_PRODUCT(_count_inlines = 0;) |
51 if (_caller_jvms != NULL) { | |
52 // Keep a private copy of the caller_jvms: | |
53 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); | |
54 _caller_jvms->set_bci(caller_jvms->bci()); | |
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55 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); |
0 | 56 } |
57 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); | |
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58 assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter"); |
0 | 59 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); |
60 if (UseOldInlining) { | |
61 // Update hierarchical counts, count_inline_bcs() and count_inlines() | |
62 InlineTree *caller = (InlineTree *)caller_tree; | |
63 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { | |
64 caller->_count_inline_bcs += count_inline_bcs(); | |
65 NOT_PRODUCT(caller->_count_inlines++;) | |
66 } | |
67 } | |
68 } | |
69 | |
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70 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, |
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71 float site_invoke_ratio, int max_inline_level) : |
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72 C(c), |
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73 _caller_jvms(caller_jvms), |
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74 _caller_tree(NULL), |
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75 _method(callee_method), |
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76 _site_invoke_ratio(site_invoke_ratio), |
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77 _max_inline_level(max_inline_level), |
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78 _count_inline_bcs(method()->code_size()) |
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79 { |
0 | 80 NOT_PRODUCT(_count_inlines = 0;) |
81 assert(!UseOldInlining, "do not use for old stuff"); | |
82 } | |
83 | |
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84 static bool is_init_with_ea(ciMethod* callee_method, |
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85 ciMethod* caller_method, Compile* C) { |
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86 // True when EA is ON and a java constructor is called or |
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87 // a super constructor is called from an inlined java constructor. |
244 | 88 return C->do_escape_analysis() && EliminateAllocations && |
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89 ( callee_method->is_initializer() || |
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90 (caller_method->is_initializer() && |
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91 caller_method != C->method() && |
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92 caller_method->holder()->is_subclass_of(callee_method->holder())) |
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93 ); |
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94 } |
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95 |
0 | 96 // positive filter: should send be inlined? returns NULL, if yes, or rejection msg |
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97 const char* InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const { |
0 | 98 // Allows targeted inlining |
99 if(callee_method->should_inline()) { | |
100 *wci_result = *(WarmCallInfo::always_hot()); | |
101 if (PrintInlining && Verbose) { | |
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102 CompileTask::print_inline_indent(inline_level()); |
0 | 103 tty->print_cr("Inlined method is hot: "); |
104 } | |
105 return NULL; | |
106 } | |
107 | |
108 // positive filter: should send be inlined? returns NULL (--> yes) | |
109 // or rejection msg | |
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110 int size = callee_method->code_size_for_inlining(); |
0 | 111 |
112 // Check for too many throws (and not too huge) | |
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113 if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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114 size < InlineThrowMaxSize ) { |
0 | 115 wci_result->set_profit(wci_result->profit() * 100); |
116 if (PrintInlining && Verbose) { | |
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117 CompileTask::print_inline_indent(inline_level()); |
0 | 118 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); |
119 } | |
120 return NULL; | |
121 } | |
122 | |
123 if (!UseOldInlining) { | |
124 return NULL; // size and frequency are represented in a new way | |
125 } | |
126 | |
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127 int default_max_inline_size = C->max_inline_size(); |
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128 int inline_small_code_size = InlineSmallCode / 4; |
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129 int max_inline_size = default_max_inline_size; |
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130 |
0 | 131 int call_site_count = method()->scale_count(profile.count()); |
132 int invoke_count = method()->interpreter_invocation_count(); | |
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133 |
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134 // Bytecoded method handle adapters do not have interpreter |
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135 // profiling data but only made up MDO data. Get the counter from |
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136 // there. |
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137 if (caller_method->is_method_handle_adapter()) { |
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138 assert(method()->method_data_or_null(), "must have an MDO"); |
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139 ciMethodData* mdo = method()->method_data(); |
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140 ciProfileData* mha_profile = mdo->bci_to_data(caller_bci); |
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141 assert(mha_profile, "must exist"); |
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142 CounterData* cd = mha_profile->as_CounterData(); |
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143 invoke_count = cd->count(); |
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144 if (invoke_count == 0) { |
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145 return "method handle not reached"; |
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146 } |
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147 |
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148 if (_caller_jvms != NULL && _caller_jvms->method() != NULL && |
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149 _caller_jvms->method()->method_data() != NULL && |
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150 !_caller_jvms->method()->method_data()->is_empty()) { |
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151 ciMethodData* mdo = _caller_jvms->method()->method_data(); |
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152 ciProfileData* mha_profile = mdo->bci_to_data(_caller_jvms->bci()); |
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153 assert(mha_profile, "must exist"); |
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154 CounterData* cd = mha_profile->as_CounterData(); |
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155 call_site_count = cd->count(); |
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156 } else { |
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157 call_site_count = invoke_count; // use the same value |
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158 } |
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159 } |
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160 |
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161 assert(invoke_count != 0, "require invocation count greater than zero"); |
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162 int freq = call_site_count / invoke_count; |
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163 |
0 | 164 // bump the max size if the call is frequent |
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165 if ((freq >= InlineFrequencyRatio) || |
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166 (call_site_count >= InlineFrequencyCount) || |
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167 is_init_with_ea(callee_method, caller_method, C)) { |
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168 |
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169 max_inline_size = C->freq_inline_size(); |
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170 if (size <= max_inline_size && TraceFrequencyInlining) { |
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171 CompileTask::print_inline_indent(inline_level()); |
0 | 172 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); |
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173 CompileTask::print_inline_indent(inline_level()); |
0 | 174 callee_method->print(); |
175 tty->cr(); | |
176 } | |
177 } else { | |
178 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. | |
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179 if (callee_method->has_compiled_code() && |
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180 callee_method->instructions_size(CompLevel_full_optimization) > inline_small_code_size) |
0 | 181 return "already compiled into a medium method"; |
182 } | |
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183 if (size > max_inline_size) { |
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184 if (max_inline_size > default_max_inline_size) |
0 | 185 return "hot method too big"; |
186 return "too big"; | |
187 } | |
188 return NULL; | |
189 } | |
190 | |
191 | |
192 // negative filter: should send NOT be inlined? returns NULL, ok to inline, or rejection msg | |
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193 const char* InlineTree::should_not_inline(ciMethod *callee_method, ciMethod* caller_method, WarmCallInfo* wci_result) const { |
0 | 194 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg |
195 if (!UseOldInlining) { | |
196 const char* fail = NULL; | |
197 if (callee_method->is_abstract()) fail = "abstract method"; | |
198 // note: we allow ik->is_abstract() | |
199 if (!callee_method->holder()->is_initialized()) fail = "method holder not initialized"; | |
200 if (callee_method->is_native()) fail = "native method"; | |
201 | |
202 if (fail) { | |
203 *wci_result = *(WarmCallInfo::always_cold()); | |
204 return fail; | |
205 } | |
206 | |
207 if (callee_method->has_unloaded_classes_in_signature()) { | |
208 wci_result->set_profit(wci_result->profit() * 0.1); | |
209 } | |
210 | |
211 // don't inline exception code unless the top method belongs to an | |
212 // exception class | |
213 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
214 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); | |
215 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
216 wci_result->set_profit(wci_result->profit() * 0.1); | |
217 } | |
218 } | |
219 | |
1783 | 220 if (callee_method->has_compiled_code() && callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode) { |
0 | 221 wci_result->set_profit(wci_result->profit() * 0.1); |
222 // %%% adjust wci_result->size()? | |
223 } | |
224 | |
225 return NULL; | |
226 } | |
227 | |
1564 | 228 // Always inline MethodHandle methods and generated MethodHandle adapters. |
229 if (callee_method->is_method_handle_invoke() || callee_method->is_method_handle_adapter()) | |
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230 return NULL; |
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231 |
0 | 232 // First check all inlining restrictions which are required for correctness |
233 if (callee_method->is_abstract()) return "abstract method"; | |
234 // note: we allow ik->is_abstract() | |
235 if (!callee_method->holder()->is_initialized()) return "method holder not initialized"; | |
236 if (callee_method->is_native()) return "native method"; | |
237 if (callee_method->has_unloaded_classes_in_signature()) return "unloaded signature classes"; | |
238 | |
239 if (callee_method->should_inline()) { | |
240 // ignore heuristic controls on inlining | |
241 return NULL; | |
242 } | |
243 | |
244 // Now perform checks which are heuristic | |
245 | |
1783 | 246 if( callee_method->has_compiled_code() && callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode ) |
0 | 247 return "already compiled into a big method"; |
248 | |
249 // don't inline exception code unless the top method belongs to an | |
250 // exception class | |
251 if (caller_tree() != NULL && | |
252 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
253 const InlineTree *top = this; | |
254 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
255 ciInstanceKlass* k = top->method()->holder(); | |
256 if (!k->is_subclass_of(C->env()->Throwable_klass())) | |
257 return "exception method"; | |
258 } | |
259 | |
260 // use frequency-based objections only for non-trivial methods | |
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261 if (callee_method->code_size_for_inlining() <= MaxTrivialSize) return NULL; |
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262 |
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263 // don't use counts with -Xcomp or CTW |
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264 if (UseInterpreter && !CompileTheWorld) { |
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265 |
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266 if (!callee_method->has_compiled_code() && |
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267 !callee_method->was_executed_more_than(0)) { |
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268 return "never executed"; |
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269 } |
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270 |
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271 if (is_init_with_ea(callee_method, caller_method, C)) { |
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272 |
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273 // Escape Analysis: inline all executed constructors |
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274 |
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275 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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276 CompileThreshold >> 1))) { |
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277 return "executed < MinInliningThreshold times"; |
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278 } |
0 | 279 } |
280 | |
281 if (callee_method->should_not_inline()) { | |
282 return "disallowed by CompilerOracle"; | |
283 } | |
284 | |
675 | 285 if (UseStringCache) { |
286 // Do not inline StringCache::profile() method used only at the beginning. | |
287 if (callee_method->name() == ciSymbol::profile_name() && | |
288 callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { | |
289 return "profiling method"; | |
290 } | |
291 } | |
292 | |
0 | 293 return NULL; |
294 } | |
295 | |
296 //-----------------------------try_to_inline----------------------------------- | |
297 // return NULL if ok, reason for not inlining otherwise | |
298 // Relocated from "InliningClosure::try_to_inline" | |
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299 const char* InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) { |
0 | 300 |
301 // Old algorithm had funny accumulating BC-size counters | |
302 if (UseOldInlining && ClipInlining | |
303 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
304 return "size > DesiredMethodLimit"; | |
305 } | |
306 | |
307 const char *msg = NULL; | |
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308 msg = should_inline(callee_method, caller_method, caller_bci, profile, wci_result); |
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309 if (msg != NULL) |
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310 return msg; |
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311 |
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312 msg = should_not_inline(callee_method, caller_method, wci_result); |
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313 if (msg != NULL) |
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314 return msg; |
0 | 315 |
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316 if (InlineAccessors && callee_method->is_accessor()) { |
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317 // accessor methods are not subject to any of the following limits. |
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318 return NULL; |
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319 } |
0 | 320 |
321 // suppress a few checks for accessors and trivial methods | |
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322 if (callee_method->code_size_for_inlining() > MaxTrivialSize) { |
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323 |
0 | 324 // don't inline into giant methods |
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325 if (C->unique() > (uint)NodeCountInliningCutoff) { |
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326 return "NodeCountInliningCutoff"; |
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327 } |
0 | 328 |
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329 if ((!UseInterpreter || CompileTheWorld) && |
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330 is_init_with_ea(callee_method, caller_method, C)) { |
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331 |
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332 // Escape Analysis stress testing when running Xcomp or CTW: |
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333 // inline constructors even if they are not reached. |
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334 |
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335 } else if (profile.count() == 0) { |
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336 // don't inline unreached call sites |
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337 return "call site not reached"; |
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338 } |
0 | 339 } |
340 | |
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341 if (!C->do_inlining() && InlineAccessors) { |
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342 return "not an accessor"; |
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343 } |
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344 if (inline_level() > _max_inline_level) { |
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345 return "inlining too deep"; |
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346 } |
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347 |
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348 // detect direct and indirect recursive inlining |
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349 { |
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350 // count the current method and the callee |
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351 int inline_level = (method() == callee_method) ? 1 : 0; |
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352 if (inline_level > MaxRecursiveInlineLevel) |
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353 return "recursively inlining too deep"; |
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354 // count callers of current method and callee |
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355 JVMState* jvms = caller_jvms(); |
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356 while (jvms != NULL && jvms->has_method()) { |
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357 if (jvms->method() == callee_method) { |
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358 inline_level++; |
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359 if (inline_level > MaxRecursiveInlineLevel) |
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360 return "recursively inlining too deep"; |
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361 } |
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362 jvms = jvms->caller(); |
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363 } |
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364 } |
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365 |
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366 int size = callee_method->code_size_for_inlining(); |
0 | 367 |
368 if (UseOldInlining && ClipInlining | |
369 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
370 return "size > DesiredMethodLimit"; | |
371 } | |
372 | |
373 // ok, inline this method | |
374 return NULL; | |
375 } | |
376 | |
377 //------------------------------pass_initial_checks---------------------------- | |
378 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
379 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
380 // Check if a callee_method was suggested | |
381 if( callee_method == NULL ) return false; | |
382 // Check if klass of callee_method is loaded | |
383 if( !callee_holder->is_loaded() ) return false; | |
384 if( !callee_holder->is_initialized() ) return false; | |
385 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
386 // Checks that constant pool's call site has been visited | |
387 // stricter than callee_holder->is_initialized() | |
388 ciBytecodeStream iter(caller_method); | |
389 iter.force_bci(caller_bci); | |
390 Bytecodes::Code call_bc = iter.cur_bc(); | |
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391 // An invokedynamic instruction does not have a klass. |
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392 if (call_bc != Bytecodes::_invokedynamic) { |
1565 | 393 int index = iter.get_index_u2_cpcache(); |
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394 if (!caller_method->is_klass_loaded(index, true)) { |
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395 return false; |
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396 } |
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397 // Try to do constant pool resolution if running Xcomp |
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398 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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399 return false; |
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400 } |
0 | 401 } |
402 } | |
403 // We will attempt to see if a class/field/etc got properly loaded. If it | |
404 // did not, it may attempt to throw an exception during our probing. Catch | |
405 // and ignore such exceptions and do not attempt to compile the method. | |
406 if( callee_method->should_exclude() ) return false; | |
407 | |
408 return true; | |
409 } | |
410 | |
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411 //------------------------------check_can_parse-------------------------------- |
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412 const char* InlineTree::check_can_parse(ciMethod* callee) { |
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413 // Certain methods cannot be parsed at all: |
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414 if ( callee->is_native()) return "native method"; |
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415 if (!callee->can_be_compiled()) return "not compilable (disabled)"; |
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416 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)"; |
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417 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)"; |
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418 return NULL; |
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419 } |
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420 |
0 | 421 //------------------------------print_inlining--------------------------------- |
422 // Really, the failure_msg can be a success message also. | |
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423 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, const char* failure_msg) const { |
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424 CompileTask::print_inlining(callee_method, inline_level(), caller_bci, failure_msg ? failure_msg : "inline"); |
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425 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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426 if (Verbose && callee_method) { |
0 | 427 const InlineTree *top = this; |
428 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } | |
429 tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); | |
430 } | |
431 } | |
432 | |
433 //------------------------------ok_to_inline----------------------------------- | |
434 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci) { | |
435 assert(callee_method != NULL, "caller checks for optimized virtual!"); | |
436 #ifdef ASSERT | |
437 // Make sure the incoming jvms has the same information content as me. | |
438 // This means that we can eventually make this whole class AllStatic. | |
439 if (jvms->caller() == NULL) { | |
440 assert(_caller_jvms == NULL, "redundant instance state"); | |
441 } else { | |
442 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
443 } | |
444 assert(_method == jvms->method(), "redundant instance state"); | |
445 #endif | |
446 const char *failure_msg = NULL; | |
447 int caller_bci = jvms->bci(); | |
448 ciMethod *caller_method = jvms->method(); | |
449 | |
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450 // Do some initial checks. |
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451 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) { |
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452 if (PrintInlining) { |
0 | 453 failure_msg = "failed_initial_checks"; |
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454 print_inlining(callee_method, caller_bci, failure_msg); |
0 | 455 } |
456 return NULL; | |
457 } | |
458 | |
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459 // Do some parse checks. |
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460 failure_msg = check_can_parse(callee_method); |
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461 if (failure_msg != NULL) { |
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462 if (PrintInlining) print_inlining(callee_method, caller_bci, failure_msg); |
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463 return NULL; |
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464 } |
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465 |
0 | 466 // Check if inlining policy says no. |
467 WarmCallInfo wci = *(initial_wci); | |
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468 failure_msg = try_to_inline(callee_method, caller_method, caller_bci, profile, &wci); |
0 | 469 if (failure_msg != NULL && C->log() != NULL) { |
470 C->log()->begin_elem("inline_fail reason='"); | |
471 C->log()->text("%s", failure_msg); | |
472 C->log()->end_elem("'"); | |
473 } | |
474 | |
475 #ifndef PRODUCT | |
476 if (UseOldInlining && InlineWarmCalls | |
477 && (PrintOpto || PrintOptoInlining || PrintInlining)) { | |
478 bool cold = wci.is_cold(); | |
479 bool hot = !cold && wci.is_hot(); | |
480 bool old_cold = (failure_msg != NULL); | |
481 if (old_cold != cold || (Verbose || WizardMode)) { | |
482 tty->print(" OldInlining= %4s : %s\n WCI=", | |
483 old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK"); | |
484 wci.print(); | |
485 } | |
486 } | |
487 #endif | |
488 if (UseOldInlining) { | |
489 if (failure_msg == NULL) | |
490 wci = *(WarmCallInfo::always_hot()); | |
491 else | |
492 wci = *(WarmCallInfo::always_cold()); | |
493 } | |
494 if (!InlineWarmCalls) { | |
495 if (!wci.is_cold() && !wci.is_hot()) { | |
496 // Do not inline the warm calls. | |
497 wci = *(WarmCallInfo::always_cold()); | |
498 } | |
499 } | |
500 | |
501 if (!wci.is_cold()) { | |
502 // In -UseOldInlining, the failure_msg may also be a success message. | |
503 if (failure_msg == NULL) failure_msg = "inline (hot)"; | |
504 | |
505 // Inline! | |
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506 if (PrintInlining) print_inlining(callee_method, caller_bci, failure_msg); |
0 | 507 if (UseOldInlining) |
508 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
509 if (InlineWarmCalls && !wci.is_hot()) | |
510 return new (C) WarmCallInfo(wci); // copy to heap | |
511 return WarmCallInfo::always_hot(); | |
512 } | |
513 | |
514 // Do not inline | |
515 if (failure_msg == NULL) failure_msg = "too cold to inline"; | |
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516 if (PrintInlining) print_inlining(callee_method, caller_bci, failure_msg); |
0 | 517 return NULL; |
518 } | |
519 | |
520 //------------------------------compute_callee_frequency----------------------- | |
521 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
522 int count = method()->interpreter_call_site_count(caller_bci); | |
523 int invcnt = method()->interpreter_invocation_count(); | |
524 float freq = (float)count/(float)invcnt; | |
525 // Call-site count / interpreter invocation count, scaled recursively. | |
526 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
527 // total execution time used at this call site. | |
528 | |
529 return freq; | |
530 } | |
531 | |
532 //------------------------------build_inline_tree_for_callee------------------- | |
533 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
534 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
535 // Attempt inlining. | |
536 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
537 if (old_ilt != NULL) { | |
538 return old_ilt; | |
539 } | |
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540 int max_inline_level_adjust = 0; |
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541 if (caller_jvms->method() != NULL) { |
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542 if (caller_jvms->method()->is_method_handle_adapter()) |
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543 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames |
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544 else if (callee_method->is_method_handle_invoke()) { |
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545 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem |
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546 } |
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547 if (max_inline_level_adjust != 0 && PrintInlining && (Verbose || WizardMode)) { |
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548 CompileTask::print_inline_indent(inline_level()); |
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549 tty->print_cr(" \\-> discounting inline depth"); |
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550 } |
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551 if (max_inline_level_adjust != 0 && C->log()) { |
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552 int id1 = C->log()->identify(caller_jvms->method()); |
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553 int id2 = C->log()->identify(callee_method); |
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554 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2); |
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555 } |
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556 } |
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557 InlineTree* ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _max_inline_level + max_inline_level_adjust); |
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558 _subtrees.append(ilt); |
0 | 559 |
560 NOT_PRODUCT( _count_inlines += 1; ) | |
561 | |
562 return ilt; | |
563 } | |
564 | |
565 | |
566 //---------------------------------------callee_at----------------------------- | |
567 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
568 for (int i = 0; i < _subtrees.length(); i++) { | |
569 InlineTree* sub = _subtrees.at(i); | |
570 if (sub->caller_bci() == bci && callee == sub->method()) { | |
571 return sub; | |
572 } | |
573 } | |
574 return NULL; | |
575 } | |
576 | |
577 | |
578 //------------------------------build_inline_tree_root------------------------- | |
579 InlineTree *InlineTree::build_inline_tree_root() { | |
580 Compile* C = Compile::current(); | |
581 | |
582 // Root of inline tree | |
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583 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel); |
0 | 584 |
585 return ilt; | |
586 } | |
587 | |
588 | |
589 //-------------------------find_subtree_from_root----------------------------- | |
590 // Given a jvms, which determines a call chain from the root method, | |
591 // find the corresponding inline tree. | |
592 // Note: This method will be removed or replaced as InlineTree goes away. | |
593 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee, bool create_if_not_found) { | |
594 InlineTree* iltp = root; | |
595 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
596 for (uint d = 1; d <= depth; d++) { | |
597 JVMState* jvmsp = jvms->of_depth(d); | |
598 // Select the corresponding subtree for this bci. | |
599 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
600 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
601 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
602 if (!sub) { | |
603 if (create_if_not_found && d == depth) { | |
604 return iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); | |
605 } | |
606 assert(sub != NULL, "should be a sub-ilt here"); | |
607 return NULL; | |
608 } | |
609 iltp = sub; | |
610 } | |
611 return iltp; | |
612 } | |
3939 | 613 |
614 | |
615 | |
616 #ifndef PRODUCT | |
617 void InlineTree::print_impl(outputStream* st, int indent) const { | |
618 for (int i = 0; i < indent; i++) st->print(" "); | |
619 st->print(" @ %d ", caller_bci()); | |
620 method()->print_short_name(st); | |
621 st->cr(); | |
622 | |
623 for (int i = 0 ; i < _subtrees.length(); i++) { | |
624 _subtrees.at(i)->print_impl(st, indent + 2); | |
625 } | |
626 } | |
627 | |
628 void InlineTree::print_value_on(outputStream* st) const { | |
629 print_impl(st, 2); | |
630 } | |
631 #endif |