Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 12966:b2ee5dc63353
8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti
author | roland |
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date | Wed, 23 Oct 2013 12:40:23 +0200 |
parents | 0c4c40f5c399 |
children | e74074c34312 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2012, 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 { |
0 | 53 NOT_PRODUCT(_count_inlines = 0;) |
54 if (_caller_jvms != NULL) { | |
55 // Keep a private copy of the caller_jvms: | |
56 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); | |
57 _caller_jvms->set_bci(caller_jvms->bci()); | |
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58 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); |
0 | 59 } |
60 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); | |
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61 assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter"); |
0 | 62 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); |
63 if (UseOldInlining) { | |
64 // Update hierarchical counts, count_inline_bcs() and count_inlines() | |
65 InlineTree *caller = (InlineTree *)caller_tree; | |
66 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { | |
67 caller->_count_inline_bcs += count_inline_bcs(); | |
68 NOT_PRODUCT(caller->_count_inlines++;) | |
69 } | |
70 } | |
71 } | |
72 | |
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73 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, |
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74 float site_invoke_ratio, int max_inline_level) : |
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75 C(c), |
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76 _caller_jvms(caller_jvms), |
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77 _caller_tree(NULL), |
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78 _method(callee_method), |
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79 _site_invoke_ratio(site_invoke_ratio), |
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80 _max_inline_level(max_inline_level), |
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81 _count_inline_bcs(method()->code_size()), |
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82 _msg(NULL) |
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83 { |
0 | 84 NOT_PRODUCT(_count_inlines = 0;) |
85 assert(!UseOldInlining, "do not use for old stuff"); | |
86 } | |
87 | |
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88 /** |
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89 * Return true when EA is ON and a java constructor is called or |
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90 * a super constructor is called from an inlined java constructor. |
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91 * Also return true for boxing methods. |
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92 */ |
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93 static bool is_init_with_ea(ciMethod* callee_method, |
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94 ciMethod* caller_method, Compile* C) { |
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95 if (!C->do_escape_analysis() || !EliminateAllocations) { |
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96 return false; // EA is off |
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97 } |
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98 if (callee_method->is_initializer()) { |
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99 return true; // constuctor |
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100 } |
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101 if (caller_method->is_initializer() && |
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102 caller_method != C->method() && |
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103 caller_method->holder()->is_subclass_of(callee_method->holder())) { |
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104 return true; // super constructor is called from inlined constructor |
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105 } |
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106 if (C->eliminate_boxing() && callee_method->is_boxing_method()) { |
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107 return true; |
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108 } |
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109 return false; |
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110 } |
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111 |
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112 /** |
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113 * Force inlining unboxing accessor. |
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114 */ |
10278 | 115 static bool is_unboxing_method(ciMethod* callee_method, Compile* C) { |
116 return C->eliminate_boxing() && callee_method->is_unboxing_method(); | |
117 } | |
118 | |
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119 // positive filter: should callee be inlined? |
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120 bool InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, |
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121 int caller_bci, ciCallProfile& profile, |
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122 WarmCallInfo* wci_result) { |
0 | 123 // Allows targeted inlining |
124 if(callee_method->should_inline()) { | |
125 *wci_result = *(WarmCallInfo::always_hot()); | |
12295 | 126 if (C->print_inlining() && Verbose) { |
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127 CompileTask::print_inline_indent(inline_level()); |
0 | 128 tty->print_cr("Inlined method is hot: "); |
129 } | |
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130 set_msg("force inline by CompilerOracle"); |
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131 return true; |
0 | 132 } |
133 | |
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134 int size = callee_method->code_size_for_inlining(); |
0 | 135 |
136 // Check for too many throws (and not too huge) | |
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137 if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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138 size < InlineThrowMaxSize ) { |
0 | 139 wci_result->set_profit(wci_result->profit() * 100); |
12295 | 140 if (C->print_inlining() && Verbose) { |
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141 CompileTask::print_inline_indent(inline_level()); |
0 | 142 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); |
143 } | |
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144 set_msg("many throws"); |
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145 return true; |
0 | 146 } |
147 | |
148 if (!UseOldInlining) { | |
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149 set_msg("!UseOldInlining"); |
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150 return true; // size and frequency are represented in a new way |
0 | 151 } |
152 | |
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153 int default_max_inline_size = C->max_inline_size(); |
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154 int inline_small_code_size = InlineSmallCode / 4; |
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155 int max_inline_size = default_max_inline_size; |
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156 |
0 | 157 int call_site_count = method()->scale_count(profile.count()); |
158 int invoke_count = method()->interpreter_invocation_count(); | |
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159 |
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160 assert(invoke_count != 0, "require invocation count greater than zero"); |
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161 int freq = call_site_count / invoke_count; |
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162 |
0 | 163 // bump the max size if the call is frequent |
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164 if ((freq >= InlineFrequencyRatio) || |
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165 (call_site_count >= InlineFrequencyCount) || |
10278 | 166 is_unboxing_method(callee_method, C) || |
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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() > inline_small_code_size) { |
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181 set_msg("already compiled into a medium method"); |
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182 return false; |
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183 } |
0 | 184 } |
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185 if (size > max_inline_size) { |
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186 if (max_inline_size > default_max_inline_size) { |
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187 set_msg("hot method too big"); |
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188 } else { |
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189 set_msg("too big"); |
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190 } |
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191 return false; |
0 | 192 } |
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193 return true; |
0 | 194 } |
195 | |
196 | |
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197 // negative filter: should callee NOT be inlined? |
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198 bool InlineTree::should_not_inline(ciMethod *callee_method, |
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199 ciMethod* caller_method, |
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200 JVMState* jvms, |
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201 WarmCallInfo* wci_result) { |
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202 |
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203 const char* fail_msg = NULL; |
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204 |
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205 // First check all inlining restrictions which are required for correctness |
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206 if ( callee_method->is_abstract()) { |
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207 fail_msg = "abstract method"; // // note: we allow ik->is_abstract() |
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208 } else if (!callee_method->holder()->is_initialized()) { |
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209 fail_msg = "method holder not initialized"; |
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210 } else if ( callee_method->is_native()) { |
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211 fail_msg = "native method"; |
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212 } else if ( callee_method->dont_inline()) { |
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213 fail_msg = "don't inline by annotation"; |
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214 } |
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215 |
0 | 216 if (!UseOldInlining) { |
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217 if (fail_msg != NULL) { |
0 | 218 *wci_result = *(WarmCallInfo::always_cold()); |
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219 set_msg(fail_msg); |
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220 return true; |
0 | 221 } |
222 | |
223 if (callee_method->has_unloaded_classes_in_signature()) { | |
224 wci_result->set_profit(wci_result->profit() * 0.1); | |
225 } | |
226 | |
227 // don't inline exception code unless the top method belongs to an | |
228 // exception class | |
229 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
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230 ciMethod* top_method = jvms->caller() != NULL ? jvms->caller()->of_depth(1)->method() : method(); |
0 | 231 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { |
232 wci_result->set_profit(wci_result->profit() * 0.1); | |
233 } | |
234 } | |
235 | |
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236 if (callee_method->has_compiled_code() && |
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237 callee_method->instructions_size() > InlineSmallCode) { |
0 | 238 wci_result->set_profit(wci_result->profit() * 0.1); |
239 // %%% adjust wci_result->size()? | |
240 } | |
241 | |
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242 return false; |
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243 } |
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244 |
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245 // one more inlining restriction |
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246 if (fail_msg == NULL && callee_method->has_unloaded_classes_in_signature()) { |
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247 fail_msg = "unloaded signature classes"; |
0 | 248 } |
249 | |
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250 if (fail_msg != NULL) { |
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251 set_msg(fail_msg); |
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252 return true; |
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253 } |
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254 |
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255 // ignore heuristic controls on inlining |
7473 | 256 if (callee_method->should_inline()) { |
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257 set_msg("force inline by CompilerOracle"); |
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258 return false; |
0 | 259 } |
260 | |
10278 | 261 if (callee_method->should_not_inline()) { |
262 set_msg("disallowed by CompilerOracle"); | |
263 return true; | |
264 } | |
265 | |
266 #ifndef PRODUCT | |
267 if (ciReplay::should_not_inline(callee_method)) { | |
268 set_msg("disallowed by ciReplay"); | |
269 return true; | |
270 } | |
271 #endif | |
272 | |
0 | 273 // Now perform checks which are heuristic |
274 | |
10278 | 275 if (is_unboxing_method(callee_method, C)) { |
276 // Inline unboxing methods. | |
277 return false; | |
278 } | |
279 | |
7473 | 280 if (!callee_method->force_inline()) { |
281 if (callee_method->has_compiled_code() && | |
282 callee_method->instructions_size() > InlineSmallCode) { | |
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283 set_msg("already compiled into a big method"); |
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284 return true; |
7473 | 285 } |
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286 } |
0 | 287 |
288 // don't inline exception code unless the top method belongs to an | |
289 // exception class | |
290 if (caller_tree() != NULL && | |
291 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
292 const InlineTree *top = this; | |
293 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
294 ciInstanceKlass* k = top->method()->holder(); | |
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295 if (!k->is_subclass_of(C->env()->Throwable_klass())) { |
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296 set_msg("exception method"); |
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297 return true; |
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298 } |
0 | 299 } |
300 | |
301 // use frequency-based objections only for non-trivial methods | |
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302 if (callee_method->code_size() <= MaxTrivialSize) { |
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303 return false; |
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304 } |
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305 |
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306 // don't use counts with -Xcomp or CTW |
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307 if (UseInterpreter && !CompileTheWorld) { |
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308 |
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309 if (!callee_method->has_compiled_code() && |
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310 !callee_method->was_executed_more_than(0)) { |
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311 set_msg("never executed"); |
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312 return true; |
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313 } |
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314 |
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315 if (is_init_with_ea(callee_method, caller_method, C)) { |
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316 // Escape Analysis: inline all executed constructors |
10278 | 317 return false; |
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318 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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319 CompileThreshold >> 1))) { |
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320 set_msg("executed < MinInliningThreshold times"); |
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321 return true; |
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322 } |
0 | 323 } |
324 | |
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325 return false; |
0 | 326 } |
327 | |
328 //-----------------------------try_to_inline----------------------------------- | |
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329 // return true if ok |
0 | 330 // Relocated from "InliningClosure::try_to_inline" |
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331 bool InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, |
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332 int caller_bci, JVMState* jvms, ciCallProfile& profile, |
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333 WarmCallInfo* wci_result, bool& should_delay) { |
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334 |
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335 // Old algorithm had funny accumulating BC-size counters |
0 | 336 if (UseOldInlining && ClipInlining |
337 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
7473 | 338 if (!callee_method->force_inline() || !IncrementalInline) { |
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339 set_msg("size > DesiredMethodLimit"); |
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340 return false; |
7473 | 341 } else if (!C->inlining_incrementally()) { |
342 should_delay = true; | |
343 } | |
0 | 344 } |
345 | |
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346 if (!should_inline(callee_method, caller_method, caller_bci, profile, |
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347 wci_result)) { |
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348 return false; |
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349 } |
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350 if (should_not_inline(callee_method, caller_method, jvms, wci_result)) { |
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351 return false; |
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352 } |
0 | 353 |
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354 if (InlineAccessors && callee_method->is_accessor()) { |
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355 // accessor methods are not subject to any of the following limits. |
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356 set_msg("accessor"); |
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357 return true; |
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358 } |
0 | 359 |
360 // suppress a few checks for accessors and trivial methods | |
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361 if (callee_method->code_size() > MaxTrivialSize) { |
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362 |
0 | 363 // don't inline into giant methods |
7473 | 364 if (C->over_inlining_cutoff()) { |
365 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form()) | |
366 || !IncrementalInline) { | |
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367 set_msg("NodeCountInliningCutoff"); |
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368 return false; |
7473 | 369 } else { |
370 should_delay = true; | |
371 } | |
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372 } |
0 | 373 |
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374 if ((!UseInterpreter || CompileTheWorld) && |
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375 is_init_with_ea(callee_method, caller_method, C)) { |
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376 |
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377 // Escape Analysis stress testing when running Xcomp or CTW: |
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378 // inline constructors even if they are not reached. |
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379 |
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380 } else if (profile.count() == 0) { |
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381 // don't inline unreached call sites |
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382 set_msg("call site not reached"); |
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383 return false; |
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384 } |
0 | 385 } |
386 | |
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387 if (!C->do_inlining() && InlineAccessors) { |
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388 set_msg("not an accessor"); |
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389 return false; |
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390 } |
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391 if (inline_level() > _max_inline_level) { |
7473 | 392 if (!callee_method->force_inline() || !IncrementalInline) { |
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393 set_msg("inlining too deep"); |
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394 return false; |
7473 | 395 } else if (!C->inlining_incrementally()) { |
396 should_delay = true; | |
397 } | |
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398 } |
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399 |
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400 // detect direct and indirect recursive inlining |
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401 { |
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402 // count the current method and the callee |
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403 const bool is_compiled_lambda_form = callee_method->is_compiled_lambda_form(); |
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404 int inline_level = 0; |
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405 if (!is_compiled_lambda_form) { |
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406 if (method() == callee_method) { |
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407 inline_level++; |
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408 } |
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409 } |
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410 // count callers of current method and callee |
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411 Node* callee_argument0 = is_compiled_lambda_form ? jvms->map()->argument(jvms, 0)->uncast() : NULL; |
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412 for (JVMState* j = jvms->caller(); j != NULL && j->has_method(); j = j->caller()) { |
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413 if (j->method() == callee_method) { |
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414 if (is_compiled_lambda_form) { |
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415 // Since compiled lambda forms are heavily reused we allow recursive inlining. If it is truly |
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416 // a recursion (using the same "receiver") we limit inlining otherwise we can easily blow the |
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417 // compiler stack. |
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418 Node* caller_argument0 = j->map()->argument(j, 0)->uncast(); |
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419 if (caller_argument0 == callee_argument0) { |
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420 inline_level++; |
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421 } |
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422 } else { |
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423 inline_level++; |
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424 } |
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425 } |
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426 } |
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427 if (inline_level > MaxRecursiveInlineLevel) { |
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428 set_msg("recursive inlining is too deep"); |
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429 return false; |
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430 } |
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431 } |
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432 |
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433 int size = callee_method->code_size_for_inlining(); |
0 | 434 |
435 if (UseOldInlining && ClipInlining | |
436 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
7473 | 437 if (!callee_method->force_inline() || !IncrementalInline) { |
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438 set_msg("size > DesiredMethodLimit"); |
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439 return false; |
7473 | 440 } else if (!C->inlining_incrementally()) { |
441 should_delay = true; | |
442 } | |
0 | 443 } |
444 | |
445 // ok, inline this method | |
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446 return true; |
0 | 447 } |
448 | |
449 //------------------------------pass_initial_checks---------------------------- | |
450 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
451 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
452 // Check if a callee_method was suggested | |
453 if( callee_method == NULL ) return false; | |
454 // Check if klass of callee_method is loaded | |
455 if( !callee_holder->is_loaded() ) return false; | |
456 if( !callee_holder->is_initialized() ) return false; | |
457 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
458 // Checks that constant pool's call site has been visited | |
459 // stricter than callee_holder->is_initialized() | |
460 ciBytecodeStream iter(caller_method); | |
461 iter.force_bci(caller_bci); | |
462 Bytecodes::Code call_bc = iter.cur_bc(); | |
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463 // An invokedynamic instruction does not have a klass. |
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464 if (call_bc != Bytecodes::_invokedynamic) { |
1565 | 465 int index = iter.get_index_u2_cpcache(); |
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466 if (!caller_method->is_klass_loaded(index, true)) { |
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467 return false; |
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468 } |
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469 // Try to do constant pool resolution if running Xcomp |
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470 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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471 return false; |
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472 } |
0 | 473 } |
474 } | |
475 // We will attempt to see if a class/field/etc got properly loaded. If it | |
476 // did not, it may attempt to throw an exception during our probing. Catch | |
477 // and ignore such exceptions and do not attempt to compile the method. | |
478 if( callee_method->should_exclude() ) return false; | |
479 | |
480 return true; | |
481 } | |
482 | |
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483 //------------------------------check_can_parse-------------------------------- |
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484 const char* InlineTree::check_can_parse(ciMethod* callee) { |
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485 // Certain methods cannot be parsed at all: |
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486 if ( callee->is_native()) return "native method"; |
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487 if ( callee->is_abstract()) return "abstract method"; |
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488 if (!callee->can_be_compiled()) return "not compilable (disabled)"; |
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489 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)"; |
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490 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)"; |
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491 return NULL; |
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492 } |
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493 |
0 | 494 //------------------------------print_inlining--------------------------------- |
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495 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, |
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496 bool success) const { |
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497 const char* inline_msg = msg(); |
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498 assert(inline_msg != NULL, "just checking"); |
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499 if (C->log() != NULL) { |
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500 if (success) { |
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501 C->log()->inline_success(inline_msg); |
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502 } else { |
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503 C->log()->inline_fail(inline_msg); |
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504 } |
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505 } |
12295 | 506 if (C->print_inlining()) { |
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507 C->print_inlining(callee_method, inline_level(), caller_bci, inline_msg); |
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508 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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509 if (Verbose && callee_method) { |
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510 const InlineTree *top = this; |
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511 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } |
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512 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); |
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513 } |
0 | 514 } |
515 } | |
516 | |
517 //------------------------------ok_to_inline----------------------------------- | |
7473 | 518 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) { |
0 | 519 assert(callee_method != NULL, "caller checks for optimized virtual!"); |
7473 | 520 assert(!should_delay, "should be initialized to false"); |
0 | 521 #ifdef ASSERT |
522 // Make sure the incoming jvms has the same information content as me. | |
523 // This means that we can eventually make this whole class AllStatic. | |
524 if (jvms->caller() == NULL) { | |
525 assert(_caller_jvms == NULL, "redundant instance state"); | |
526 } else { | |
527 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
528 } | |
529 assert(_method == jvms->method(), "redundant instance state"); | |
530 #endif | |
531 int caller_bci = jvms->bci(); | |
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532 ciMethod* caller_method = jvms->method(); |
0 | 533 |
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534 // Do some initial checks. |
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535 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) { |
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536 set_msg("failed initial checks"); |
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537 print_inlining(callee_method, caller_bci, false /* !success */); |
0 | 538 return NULL; |
539 } | |
540 | |
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541 // Do some parse checks. |
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542 set_msg(check_can_parse(callee_method)); |
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543 if (msg() != NULL) { |
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544 print_inlining(callee_method, caller_bci, false /* !success */); |
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545 return NULL; |
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546 } |
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547 |
0 | 548 // Check if inlining policy says no. |
549 WarmCallInfo wci = *(initial_wci); | |
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550 bool success = try_to_inline(callee_method, caller_method, caller_bci, |
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551 jvms, profile, &wci, should_delay); |
0 | 552 |
553 #ifndef PRODUCT | |
554 if (UseOldInlining && InlineWarmCalls | |
12295 | 555 && (PrintOpto || C->print_inlining())) { |
0 | 556 bool cold = wci.is_cold(); |
557 bool hot = !cold && wci.is_hot(); | |
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558 bool old_cold = !success; |
0 | 559 if (old_cold != cold || (Verbose || WizardMode)) { |
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560 if (msg() == NULL) { |
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561 set_msg("OK"); |
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562 } |
0 | 563 tty->print(" OldInlining= %4s : %s\n WCI=", |
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564 old_cold ? "cold" : "hot", msg()); |
0 | 565 wci.print(); |
566 } | |
567 } | |
568 #endif | |
569 if (UseOldInlining) { | |
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570 if (success) { |
0 | 571 wci = *(WarmCallInfo::always_hot()); |
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572 } else { |
0 | 573 wci = *(WarmCallInfo::always_cold()); |
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574 } |
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575 } |
0 | 576 if (!InlineWarmCalls) { |
577 if (!wci.is_cold() && !wci.is_hot()) { | |
578 // Do not inline the warm calls. | |
579 wci = *(WarmCallInfo::always_cold()); | |
580 } | |
581 } | |
582 | |
583 if (!wci.is_cold()) { | |
584 // Inline! | |
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585 if (msg() == NULL) { |
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586 set_msg("inline (hot)"); |
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587 } |
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588 print_inlining(callee_method, caller_bci, true /* success */); |
0 | 589 if (UseOldInlining) |
590 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
591 if (InlineWarmCalls && !wci.is_hot()) | |
592 return new (C) WarmCallInfo(wci); // copy to heap | |
593 return WarmCallInfo::always_hot(); | |
594 } | |
595 | |
596 // Do not inline | |
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597 if (msg() == NULL) { |
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598 set_msg("too cold to inline"); |
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599 } |
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600 print_inlining(callee_method, caller_bci, false /* !success */ ); |
0 | 601 return NULL; |
602 } | |
603 | |
604 //------------------------------compute_callee_frequency----------------------- | |
605 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
606 int count = method()->interpreter_call_site_count(caller_bci); | |
607 int invcnt = method()->interpreter_invocation_count(); | |
608 float freq = (float)count/(float)invcnt; | |
609 // Call-site count / interpreter invocation count, scaled recursively. | |
610 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
611 // total execution time used at this call site. | |
612 | |
613 return freq; | |
614 } | |
615 | |
616 //------------------------------build_inline_tree_for_callee------------------- | |
617 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
618 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
619 // Attempt inlining. | |
620 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
621 if (old_ilt != NULL) { | |
622 return old_ilt; | |
623 } | |
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624 int max_inline_level_adjust = 0; |
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625 if (caller_jvms->method() != NULL) { |
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626 if (caller_jvms->method()->is_compiled_lambda_form()) |
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627 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames |
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628 else if (callee_method->is_method_handle_intrinsic() || |
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629 callee_method->is_compiled_lambda_form()) { |
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630 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem |
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631 } |
12295 | 632 if (max_inline_level_adjust != 0 && C->print_inlining() && (Verbose || WizardMode)) { |
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633 CompileTask::print_inline_indent(inline_level()); |
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634 tty->print_cr(" \\-> discounting inline depth"); |
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635 } |
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636 if (max_inline_level_adjust != 0 && C->log()) { |
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637 int id1 = C->log()->identify(caller_jvms->method()); |
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638 int id2 = C->log()->identify(callee_method); |
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639 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2); |
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640 } |
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641 } |
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642 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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643 _subtrees.append(ilt); |
0 | 644 |
645 NOT_PRODUCT( _count_inlines += 1; ) | |
646 | |
647 return ilt; | |
648 } | |
649 | |
650 | |
651 //---------------------------------------callee_at----------------------------- | |
652 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
653 for (int i = 0; i < _subtrees.length(); i++) { | |
654 InlineTree* sub = _subtrees.at(i); | |
655 if (sub->caller_bci() == bci && callee == sub->method()) { | |
656 return sub; | |
657 } | |
658 } | |
659 return NULL; | |
660 } | |
661 | |
662 | |
663 //------------------------------build_inline_tree_root------------------------- | |
664 InlineTree *InlineTree::build_inline_tree_root() { | |
665 Compile* C = Compile::current(); | |
666 | |
667 // Root of inline tree | |
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668 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel); |
0 | 669 |
670 return ilt; | |
671 } | |
672 | |
673 | |
674 //-------------------------find_subtree_from_root----------------------------- | |
675 // Given a jvms, which determines a call chain from the root method, | |
676 // find the corresponding inline tree. | |
677 // Note: This method will be removed or replaced as InlineTree goes away. | |
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678 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) { |
0 | 679 InlineTree* iltp = root; |
680 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
681 for (uint d = 1; d <= depth; d++) { | |
682 JVMState* jvmsp = jvms->of_depth(d); | |
683 // Select the corresponding subtree for this bci. | |
684 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
685 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
686 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
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687 if (sub == NULL) { |
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688 if (d == depth) { |
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689 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); |
0 | 690 } |
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691 guarantee(sub != NULL, "should be a sub-ilt here"); |
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692 return sub; |
0 | 693 } |
694 iltp = sub; | |
695 } | |
696 return iltp; | |
697 } | |
3939 | 698 |
699 | |
700 | |
701 #ifndef PRODUCT | |
702 void InlineTree::print_impl(outputStream* st, int indent) const { | |
703 for (int i = 0; i < indent; i++) st->print(" "); | |
704 st->print(" @ %d ", caller_bci()); | |
705 method()->print_short_name(st); | |
706 st->cr(); | |
707 | |
708 for (int i = 0 ; i < _subtrees.length(); i++) { | |
709 _subtrees.at(i)->print_impl(st, indent + 2); | |
710 } | |
711 } | |
712 | |
713 void InlineTree::print_value_on(outputStream* st) const { | |
714 print_impl(st, 2); | |
715 } | |
716 #endif |