Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 21738:28943e5044b5
Merge
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Thu, 04 Jun 2015 19:49:45 -0700 |
parents | 7848fc12602b |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2013, 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" |
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26 #include "ci/ciReplay.hpp" |
1972 | 27 #include "classfile/systemDictionary.hpp" |
28 #include "classfile/vmSymbols.hpp" | |
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29 #include "compiler/compileBroker.hpp" |
1972 | 30 #include "compiler/compileLog.hpp" |
31 #include "interpreter/linkResolver.hpp" | |
32 #include "oops/objArrayKlass.hpp" | |
33 #include "opto/callGenerator.hpp" | |
34 #include "opto/parse.hpp" | |
35 #include "runtime/handles.inline.hpp" | |
0 | 36 |
37 //============================================================================= | |
38 //------------------------------InlineTree------------------------------------- | |
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39 InlineTree::InlineTree(Compile* c, |
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40 const InlineTree *caller_tree, ciMethod* callee, |
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41 JVMState* caller_jvms, int caller_bci, |
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42 float site_invoke_ratio, int max_inline_level) : |
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43 C(c), |
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44 _caller_jvms(caller_jvms), |
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45 _caller_tree((InlineTree*) caller_tree), |
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46 _method(callee), |
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47 _site_invoke_ratio(site_invoke_ratio), |
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48 _max_inline_level(max_inline_level), |
7473 | 49 _count_inline_bcs(method()->code_size_for_inlining()), |
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50 _subtrees(c->comp_arena(), 2, 0, NULL), |
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51 _msg(NULL) |
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52 { |
14232 | 53 #ifndef PRODUCT |
54 _count_inlines = 0; | |
55 _forced_inline = false; | |
56 #endif | |
0 | 57 if (_caller_jvms != NULL) { |
58 // Keep a private copy of the caller_jvms: | |
59 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); | |
60 _caller_jvms->set_bci(caller_jvms->bci()); | |
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61 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); |
0 | 62 } |
63 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); | |
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64 assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter"); |
0 | 65 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); |
14384 | 66 // Update hierarchical counts, count_inline_bcs() and count_inlines() |
67 InlineTree *caller = (InlineTree *)caller_tree; | |
68 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { | |
69 caller->_count_inline_bcs += count_inline_bcs(); | |
70 NOT_PRODUCT(caller->_count_inlines++;) | |
0 | 71 } |
72 } | |
73 | |
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74 /** |
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75 * Return true when EA is ON and a java constructor is called or |
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76 * a super constructor is called from an inlined java constructor. |
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77 * Also return true for boxing methods. |
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78 */ |
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79 static bool is_init_with_ea(ciMethod* callee_method, |
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80 ciMethod* caller_method, Compile* C) { |
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81 if (!C->do_escape_analysis() || !EliminateAllocations) { |
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82 return false; // EA is off |
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83 } |
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84 if (callee_method->is_initializer()) { |
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85 return true; // constuctor |
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86 } |
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87 if (caller_method->is_initializer() && |
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88 caller_method != C->method() && |
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89 caller_method->holder()->is_subclass_of(callee_method->holder())) { |
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90 return true; // super constructor is called from inlined constructor |
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91 } |
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92 if (C->eliminate_boxing() && callee_method->is_boxing_method()) { |
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93 return true; |
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94 } |
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95 return false; |
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96 } |
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97 |
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98 /** |
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99 * Force inlining unboxing accessor. |
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100 */ |
10278 | 101 static bool is_unboxing_method(ciMethod* callee_method, Compile* C) { |
102 return C->eliminate_boxing() && callee_method->is_unboxing_method(); | |
103 } | |
104 | |
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105 // positive filter: should callee be inlined? |
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106 bool InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, |
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107 int caller_bci, ciCallProfile& profile, |
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108 WarmCallInfo* wci_result) { |
0 | 109 // Allows targeted inlining |
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110 if (callee_method->should_inline()) { |
0 | 111 *wci_result = *(WarmCallInfo::always_hot()); |
12295 | 112 if (C->print_inlining() && Verbose) { |
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113 CompileTask::print_inline_indent(inline_level()); |
0 | 114 tty->print_cr("Inlined method is hot: "); |
115 } | |
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116 set_msg("force inline by CompilerOracle"); |
14232 | 117 _forced_inline = true; |
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118 return true; |
0 | 119 } |
120 | |
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121 if (callee_method->force_inline()) { |
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122 set_msg("force inline by annotation"); |
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123 _forced_inline = true; |
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124 return true; |
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125 } |
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126 |
14232 | 127 #ifndef PRODUCT |
128 int inline_depth = inline_level()+1; | |
129 if (ciReplay::should_inline(C->replay_inline_data(), callee_method, caller_bci, inline_depth)) { | |
130 set_msg("force inline by ciReplay"); | |
131 _forced_inline = true; | |
132 return true; | |
133 } | |
134 #endif | |
135 | |
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136 int size = callee_method->code_size_for_inlining(); |
0 | 137 |
138 // Check for too many throws (and not too huge) | |
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139 if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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140 size < InlineThrowMaxSize ) { |
0 | 141 wci_result->set_profit(wci_result->profit() * 100); |
12295 | 142 if (C->print_inlining() && Verbose) { |
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143 CompileTask::print_inline_indent(inline_level()); |
0 | 144 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); |
145 } | |
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146 set_msg("many throws"); |
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147 return true; |
0 | 148 } |
149 | |
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150 int default_max_inline_size = C->max_inline_size(); |
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151 int inline_small_code_size = InlineSmallCode / 4; |
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152 int max_inline_size = default_max_inline_size; |
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153 |
0 | 154 int call_site_count = method()->scale_count(profile.count()); |
155 int invoke_count = method()->interpreter_invocation_count(); | |
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156 |
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157 assert(invoke_count != 0, "require invocation count greater than zero"); |
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158 int freq = call_site_count / invoke_count; |
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159 |
0 | 160 // bump the max size if the call is frequent |
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161 if ((freq >= InlineFrequencyRatio) || |
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162 (call_site_count >= InlineFrequencyCount) || |
10278 | 163 is_unboxing_method(callee_method, C) || |
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164 is_init_with_ea(callee_method, caller_method, C)) { |
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165 |
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166 max_inline_size = C->freq_inline_size(); |
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167 if (size <= max_inline_size && TraceFrequencyInlining) { |
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168 CompileTask::print_inline_indent(inline_level()); |
0 | 169 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); |
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170 CompileTask::print_inline_indent(inline_level()); |
0 | 171 callee_method->print(); |
172 tty->cr(); | |
173 } | |
174 } else { | |
175 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. | |
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176 if (callee_method->has_compiled_code() && |
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177 callee_method->instructions_size() > inline_small_code_size) { |
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178 set_msg("already compiled into a medium method"); |
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179 return false; |
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180 } |
0 | 181 } |
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182 if (size > max_inline_size) { |
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183 if (max_inline_size > default_max_inline_size) { |
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184 set_msg("hot method too big"); |
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185 } else { |
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186 set_msg("too big"); |
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187 } |
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188 return false; |
0 | 189 } |
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190 return true; |
0 | 191 } |
192 | |
193 | |
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194 // negative filter: should callee NOT be inlined? |
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195 bool InlineTree::should_not_inline(ciMethod *callee_method, |
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196 ciMethod* caller_method, |
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197 JVMState* jvms, |
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198 WarmCallInfo* wci_result) { |
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199 |
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200 const char* fail_msg = NULL; |
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201 |
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202 // First check all inlining restrictions which are required for correctness |
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203 if ( callee_method->is_abstract()) { |
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204 fail_msg = "abstract method"; // // note: we allow ik->is_abstract() |
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205 } else if (!callee_method->holder()->is_initialized()) { |
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206 fail_msg = "method holder not initialized"; |
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207 } else if ( callee_method->is_native()) { |
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208 fail_msg = "native method"; |
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209 } else if ( callee_method->dont_inline()) { |
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210 fail_msg = "don't inline by annotation"; |
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211 } |
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212 |
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213 // one more inlining restriction |
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214 if (fail_msg == NULL && callee_method->has_unloaded_classes_in_signature()) { |
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215 fail_msg = "unloaded signature classes"; |
0 | 216 } |
217 | |
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218 if (fail_msg != NULL) { |
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219 set_msg(fail_msg); |
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220 return true; |
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221 } |
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222 |
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223 // ignore heuristic controls on inlining |
7473 | 224 if (callee_method->should_inline()) { |
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225 set_msg("force inline by CompilerOracle"); |
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226 return false; |
0 | 227 } |
228 | |
10278 | 229 if (callee_method->should_not_inline()) { |
230 set_msg("disallowed by CompilerOracle"); | |
231 return true; | |
232 } | |
233 | |
234 #ifndef PRODUCT | |
14232 | 235 int caller_bci = jvms->bci(); |
236 int inline_depth = inline_level()+1; | |
237 if (ciReplay::should_inline(C->replay_inline_data(), callee_method, caller_bci, inline_depth)) { | |
238 set_msg("force inline by ciReplay"); | |
239 return false; | |
240 } | |
241 | |
242 if (ciReplay::should_not_inline(C->replay_inline_data(), callee_method, caller_bci, inline_depth)) { | |
243 set_msg("disallowed by ciReplay"); | |
244 return true; | |
245 } | |
246 | |
10278 | 247 if (ciReplay::should_not_inline(callee_method)) { |
248 set_msg("disallowed by ciReplay"); | |
249 return true; | |
250 } | |
251 #endif | |
252 | |
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253 if (callee_method->force_inline()) { |
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254 set_msg("force inline by annotation"); |
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255 return false; |
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256 } |
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257 |
0 | 258 // Now perform checks which are heuristic |
259 | |
10278 | 260 if (is_unboxing_method(callee_method, C)) { |
261 // Inline unboxing methods. | |
262 return false; | |
263 } | |
264 | |
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265 if (callee_method->has_compiled_code() && |
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266 callee_method->instructions_size() > InlineSmallCode) { |
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267 set_msg("already compiled into a big method"); |
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268 return true; |
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269 } |
0 | 270 |
271 // don't inline exception code unless the top method belongs to an | |
272 // exception class | |
273 if (caller_tree() != NULL && | |
274 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
275 const InlineTree *top = this; | |
276 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
277 ciInstanceKlass* k = top->method()->holder(); | |
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278 if (!k->is_subclass_of(C->env()->Throwable_klass())) { |
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279 set_msg("exception method"); |
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280 return true; |
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281 } |
0 | 282 } |
283 | |
284 // use frequency-based objections only for non-trivial methods | |
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285 if (callee_method->code_size() <= MaxTrivialSize) { |
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286 return false; |
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287 } |
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288 |
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289 // don't use counts with -Xcomp or CTW |
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290 if (UseInterpreter && !CompileTheWorld) { |
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291 |
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292 if (!callee_method->has_compiled_code() && |
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293 !callee_method->was_executed_more_than(0)) { |
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294 set_msg("never executed"); |
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295 return true; |
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296 } |
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297 |
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298 if (is_init_with_ea(callee_method, caller_method, C)) { |
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299 // Escape Analysis: inline all executed constructors |
10278 | 300 return false; |
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301 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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302 CompileThreshold >> 1))) { |
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303 set_msg("executed < MinInliningThreshold times"); |
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304 return true; |
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305 } |
0 | 306 } |
307 | |
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308 return false; |
0 | 309 } |
310 | |
311 //-----------------------------try_to_inline----------------------------------- | |
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312 // return true if ok |
0 | 313 // Relocated from "InliningClosure::try_to_inline" |
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314 bool InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, |
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315 int caller_bci, JVMState* jvms, ciCallProfile& profile, |
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316 WarmCallInfo* wci_result, bool& should_delay) { |
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317 |
14384 | 318 if (ClipInlining && (int)count_inline_bcs() >= DesiredMethodLimit) { |
7473 | 319 if (!callee_method->force_inline() || !IncrementalInline) { |
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320 set_msg("size > DesiredMethodLimit"); |
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321 return false; |
7473 | 322 } else if (!C->inlining_incrementally()) { |
323 should_delay = true; | |
324 } | |
0 | 325 } |
326 | |
14232 | 327 _forced_inline = false; // Reset |
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328 if (!should_inline(callee_method, caller_method, caller_bci, profile, |
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329 wci_result)) { |
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330 return false; |
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331 } |
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332 if (should_not_inline(callee_method, caller_method, jvms, wci_result)) { |
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333 return false; |
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334 } |
0 | 335 |
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336 if (InlineAccessors && callee_method->is_accessor()) { |
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337 // accessor methods are not subject to any of the following limits. |
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338 set_msg("accessor"); |
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339 return true; |
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340 } |
0 | 341 |
342 // suppress a few checks for accessors and trivial methods | |
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343 if (callee_method->code_size() > MaxTrivialSize) { |
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344 |
0 | 345 // don't inline into giant methods |
7473 | 346 if (C->over_inlining_cutoff()) { |
347 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form()) | |
348 || !IncrementalInline) { | |
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349 set_msg("NodeCountInliningCutoff"); |
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350 return false; |
7473 | 351 } else { |
352 should_delay = true; | |
353 } | |
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354 } |
0 | 355 |
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356 if ((!UseInterpreter || CompileTheWorld) && |
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357 is_init_with_ea(callee_method, caller_method, C)) { |
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358 // Escape Analysis stress testing when running Xcomp or CTW: |
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359 // inline constructors even if they are not reached. |
14232 | 360 } else if (forced_inline()) { |
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361 // Inlining was forced by CompilerOracle, ciReplay or annotation |
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362 } else if (profile.count() == 0) { |
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363 // don't inline unreached call sites |
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364 set_msg("call site not reached"); |
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365 return false; |
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366 } |
0 | 367 } |
368 | |
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369 if (!C->do_inlining() && InlineAccessors) { |
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370 set_msg("not an accessor"); |
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371 return false; |
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372 } |
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373 |
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374 // Limit inlining depth in case inlining is forced or |
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375 // _max_inline_level was increased to compensate for lambda forms. |
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376 if (inline_level() > MaxForceInlineLevel) { |
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377 set_msg("MaxForceInlineLevel"); |
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378 return false; |
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379 } |
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380 if (inline_level() > _max_inline_level) { |
7473 | 381 if (!callee_method->force_inline() || !IncrementalInline) { |
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382 set_msg("inlining too deep"); |
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383 return false; |
7473 | 384 } else if (!C->inlining_incrementally()) { |
385 should_delay = true; | |
386 } | |
41
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387 } |
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388 |
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389 // detect direct and indirect recursive inlining |
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390 { |
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391 // count the current method and the callee |
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392 const bool is_compiled_lambda_form = callee_method->is_compiled_lambda_form(); |
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393 int inline_level = 0; |
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394 if (!is_compiled_lambda_form) { |
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395 if (method() == callee_method) { |
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396 inline_level++; |
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397 } |
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398 } |
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399 // count callers of current method and callee |
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400 Node* callee_argument0 = is_compiled_lambda_form ? jvms->map()->argument(jvms, 0)->uncast() : NULL; |
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401 for (JVMState* j = jvms->caller(); j != NULL && j->has_method(); j = j->caller()) { |
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402 if (j->method() == callee_method) { |
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403 if (is_compiled_lambda_form) { |
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404 // Since compiled lambda forms are heavily reused we allow recursive inlining. If it is truly |
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405 // a recursion (using the same "receiver") we limit inlining otherwise we can easily blow the |
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406 // compiler stack. |
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407 Node* caller_argument0 = j->map()->argument(j, 0)->uncast(); |
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408 if (caller_argument0 == callee_argument0) { |
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409 inline_level++; |
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410 } |
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411 } else { |
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412 inline_level++; |
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413 } |
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414 } |
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415 } |
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416 if (inline_level > MaxRecursiveInlineLevel) { |
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417 set_msg("recursive inlining is too deep"); |
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418 return false; |
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419 } |
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420 } |
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421 |
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422 int size = callee_method->code_size_for_inlining(); |
0 | 423 |
14384 | 424 if (ClipInlining && (int)count_inline_bcs() + size >= DesiredMethodLimit) { |
7473 | 425 if (!callee_method->force_inline() || !IncrementalInline) { |
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426 set_msg("size > DesiredMethodLimit"); |
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427 return false; |
7473 | 428 } else if (!C->inlining_incrementally()) { |
429 should_delay = true; | |
430 } | |
0 | 431 } |
432 | |
433 // ok, inline this method | |
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434 return true; |
0 | 435 } |
436 | |
437 //------------------------------pass_initial_checks---------------------------- | |
438 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
439 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
440 // Check if a callee_method was suggested | |
441 if( callee_method == NULL ) return false; | |
442 // Check if klass of callee_method is loaded | |
443 if( !callee_holder->is_loaded() ) return false; | |
444 if( !callee_holder->is_initialized() ) return false; | |
445 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
446 // Checks that constant pool's call site has been visited | |
447 // stricter than callee_holder->is_initialized() | |
448 ciBytecodeStream iter(caller_method); | |
449 iter.force_bci(caller_bci); | |
450 Bytecodes::Code call_bc = iter.cur_bc(); | |
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451 // An invokedynamic instruction does not have a klass. |
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452 if (call_bc != Bytecodes::_invokedynamic) { |
1565 | 453 int index = iter.get_index_u2_cpcache(); |
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454 if (!caller_method->is_klass_loaded(index, true)) { |
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455 return false; |
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456 } |
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457 // Try to do constant pool resolution if running Xcomp |
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458 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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459 return false; |
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460 } |
0 | 461 } |
462 } | |
463 // We will attempt to see if a class/field/etc got properly loaded. If it | |
464 // did not, it may attempt to throw an exception during our probing. Catch | |
465 // and ignore such exceptions and do not attempt to compile the method. | |
466 if( callee_method->should_exclude() ) return false; | |
467 | |
468 return true; | |
469 } | |
470 | |
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471 //------------------------------check_can_parse-------------------------------- |
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472 const char* InlineTree::check_can_parse(ciMethod* callee) { |
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473 // Certain methods cannot be parsed at all: |
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474 if ( callee->is_native()) return "native method"; |
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475 if ( callee->is_abstract()) return "abstract method"; |
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476 if (!callee->can_be_compiled()) return "not compilable (disabled)"; |
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477 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)"; |
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478 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)"; |
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479 return NULL; |
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480 } |
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481 |
0 | 482 //------------------------------print_inlining--------------------------------- |
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483 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, |
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484 bool success) const { |
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485 const char* inline_msg = msg(); |
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486 assert(inline_msg != NULL, "just checking"); |
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487 if (C->log() != NULL) { |
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488 if (success) { |
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489 C->log()->inline_success(inline_msg); |
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490 } else { |
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491 C->log()->inline_fail(inline_msg); |
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492 } |
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493 } |
12295 | 494 if (C->print_inlining()) { |
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495 C->print_inlining(callee_method, inline_level(), caller_bci, inline_msg); |
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496 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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497 if (Verbose && callee_method) { |
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498 const InlineTree *top = this; |
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499 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } |
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500 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); |
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501 } |
0 | 502 } |
503 } | |
504 | |
505 //------------------------------ok_to_inline----------------------------------- | |
7473 | 506 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) { |
0 | 507 assert(callee_method != NULL, "caller checks for optimized virtual!"); |
7473 | 508 assert(!should_delay, "should be initialized to false"); |
0 | 509 #ifdef ASSERT |
510 // Make sure the incoming jvms has the same information content as me. | |
511 // This means that we can eventually make this whole class AllStatic. | |
512 if (jvms->caller() == NULL) { | |
513 assert(_caller_jvms == NULL, "redundant instance state"); | |
514 } else { | |
515 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
516 } | |
517 assert(_method == jvms->method(), "redundant instance state"); | |
518 #endif | |
519 int caller_bci = jvms->bci(); | |
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520 ciMethod* caller_method = jvms->method(); |
0 | 521 |
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522 // Do some initial checks. |
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523 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) { |
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524 set_msg("failed initial checks"); |
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525 print_inlining(callee_method, caller_bci, false /* !success */); |
0 | 526 return NULL; |
527 } | |
528 | |
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529 // Do some parse checks. |
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530 set_msg(check_can_parse(callee_method)); |
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531 if (msg() != NULL) { |
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532 print_inlining(callee_method, caller_bci, false /* !success */); |
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533 return NULL; |
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534 } |
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535 |
0 | 536 // Check if inlining policy says no. |
537 WarmCallInfo wci = *(initial_wci); | |
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538 bool success = try_to_inline(callee_method, caller_method, caller_bci, |
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539 jvms, profile, &wci, should_delay); |
0 | 540 |
541 #ifndef PRODUCT | |
14384 | 542 if (InlineWarmCalls && (PrintOpto || C->print_inlining())) { |
0 | 543 bool cold = wci.is_cold(); |
544 bool hot = !cold && wci.is_hot(); | |
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545 bool old_cold = !success; |
0 | 546 if (old_cold != cold || (Verbose || WizardMode)) { |
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547 if (msg() == NULL) { |
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548 set_msg("OK"); |
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549 } |
0 | 550 tty->print(" OldInlining= %4s : %s\n WCI=", |
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551 old_cold ? "cold" : "hot", msg()); |
0 | 552 wci.print(); |
553 } | |
554 } | |
555 #endif | |
14384 | 556 if (success) { |
557 wci = *(WarmCallInfo::always_hot()); | |
558 } else { | |
559 wci = *(WarmCallInfo::always_cold()); | |
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560 } |
14384 | 561 |
0 | 562 if (!InlineWarmCalls) { |
563 if (!wci.is_cold() && !wci.is_hot()) { | |
564 // Do not inline the warm calls. | |
565 wci = *(WarmCallInfo::always_cold()); | |
566 } | |
567 } | |
568 | |
569 if (!wci.is_cold()) { | |
570 // Inline! | |
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571 if (msg() == NULL) { |
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572 set_msg("inline (hot)"); |
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573 } |
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574 print_inlining(callee_method, caller_bci, true /* success */); |
14384 | 575 build_inline_tree_for_callee(callee_method, jvms, caller_bci); |
0 | 576 if (InlineWarmCalls && !wci.is_hot()) |
577 return new (C) WarmCallInfo(wci); // copy to heap | |
578 return WarmCallInfo::always_hot(); | |
579 } | |
580 | |
581 // Do not inline | |
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582 if (msg() == NULL) { |
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583 set_msg("too cold to inline"); |
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584 } |
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585 print_inlining(callee_method, caller_bci, false /* !success */ ); |
0 | 586 return NULL; |
587 } | |
588 | |
589 //------------------------------compute_callee_frequency----------------------- | |
590 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
591 int count = method()->interpreter_call_site_count(caller_bci); | |
592 int invcnt = method()->interpreter_invocation_count(); | |
593 float freq = (float)count/(float)invcnt; | |
594 // Call-site count / interpreter invocation count, scaled recursively. | |
595 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
596 // total execution time used at this call site. | |
597 | |
598 return freq; | |
599 } | |
600 | |
601 //------------------------------build_inline_tree_for_callee------------------- | |
602 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
603 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
604 // Attempt inlining. | |
605 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
606 if (old_ilt != NULL) { | |
607 return old_ilt; | |
608 } | |
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609 int max_inline_level_adjust = 0; |
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610 if (caller_jvms->method() != NULL) { |
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611 if (caller_jvms->method()->is_compiled_lambda_form()) |
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612 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames |
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613 else if (callee_method->is_method_handle_intrinsic() || |
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614 callee_method->is_compiled_lambda_form()) { |
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615 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem |
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616 } |
12295 | 617 if (max_inline_level_adjust != 0 && C->print_inlining() && (Verbose || WizardMode)) { |
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618 CompileTask::print_inline_indent(inline_level()); |
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619 tty->print_cr(" \\-> discounting inline depth"); |
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620 } |
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621 if (max_inline_level_adjust != 0 && C->log()) { |
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622 int id1 = C->log()->identify(caller_jvms->method()); |
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623 int id2 = C->log()->identify(callee_method); |
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624 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2); |
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625 } |
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626 } |
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627 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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628 _subtrees.append(ilt); |
0 | 629 |
630 NOT_PRODUCT( _count_inlines += 1; ) | |
631 | |
632 return ilt; | |
633 } | |
634 | |
635 | |
636 //---------------------------------------callee_at----------------------------- | |
637 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
638 for (int i = 0; i < _subtrees.length(); i++) { | |
639 InlineTree* sub = _subtrees.at(i); | |
640 if (sub->caller_bci() == bci && callee == sub->method()) { | |
641 return sub; | |
642 } | |
643 } | |
644 return NULL; | |
645 } | |
646 | |
647 | |
648 //------------------------------build_inline_tree_root------------------------- | |
649 InlineTree *InlineTree::build_inline_tree_root() { | |
650 Compile* C = Compile::current(); | |
651 | |
652 // Root of inline tree | |
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653 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel); |
0 | 654 |
655 return ilt; | |
656 } | |
657 | |
658 | |
659 //-------------------------find_subtree_from_root----------------------------- | |
660 // Given a jvms, which determines a call chain from the root method, | |
661 // find the corresponding inline tree. | |
662 // Note: This method will be removed or replaced as InlineTree goes away. | |
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663 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) { |
0 | 664 InlineTree* iltp = root; |
665 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
666 for (uint d = 1; d <= depth; d++) { | |
667 JVMState* jvmsp = jvms->of_depth(d); | |
668 // Select the corresponding subtree for this bci. | |
669 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
670 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
671 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
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672 if (sub == NULL) { |
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673 if (d == depth) { |
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674 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); |
0 | 675 } |
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676 guarantee(sub != NULL, "should be a sub-ilt here"); |
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677 return sub; |
0 | 678 } |
679 iltp = sub; | |
680 } | |
681 return iltp; | |
682 } | |
3939 | 683 |
14232 | 684 // Count number of nodes in this subtree |
685 int InlineTree::count() const { | |
686 int result = 1; | |
687 for (int i = 0 ; i < _subtrees.length(); i++) { | |
688 result += _subtrees.at(i)->count(); | |
689 } | |
690 return result; | |
691 } | |
692 | |
693 void InlineTree::dump_replay_data(outputStream* out) { | |
694 out->print(" %d %d ", inline_level(), caller_bci()); | |
695 method()->dump_name_as_ascii(out); | |
696 for (int i = 0 ; i < _subtrees.length(); i++) { | |
697 _subtrees.at(i)->dump_replay_data(out); | |
698 } | |
699 } | |
3939 | 700 |
701 | |
702 #ifndef PRODUCT | |
703 void InlineTree::print_impl(outputStream* st, int indent) const { | |
704 for (int i = 0; i < indent; i++) st->print(" "); | |
14232 | 705 st->print(" @ %d", caller_bci()); |
3939 | 706 method()->print_short_name(st); |
707 st->cr(); | |
708 | |
709 for (int i = 0 ; i < _subtrees.length(); i++) { | |
710 _subtrees.at(i)->print_impl(st, indent + 2); | |
711 } | |
712 } | |
713 | |
714 void InlineTree::print_value_on(outputStream* st) const { | |
715 print_impl(st, 2); | |
716 } | |
717 #endif |