Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 11341:ca5054bbfcdd
Merge.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Aug 2013 03:55:16 +0200 |
parents | 6b0fd0964b87 |
children | cefad50507d8 |
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()); | |
126 if (PrintInlining && 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); |
140 if (PrintInlining && 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 WarmCallInfo* wci_result) { |
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201 |
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202 const char* fail_msg = NULL; |
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203 |
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204 // First check all inlining restrictions which are required for correctness |
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205 if ( callee_method->is_abstract()) { |
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206 fail_msg = "abstract method"; // // note: we allow ik->is_abstract() |
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207 } else if (!callee_method->holder()->is_initialized()) { |
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208 fail_msg = "method holder not initialized"; |
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209 } else if ( callee_method->is_native()) { |
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210 fail_msg = "native method"; |
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211 } else if ( callee_method->dont_inline()) { |
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212 fail_msg = "don't inline by annotation"; |
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213 } |
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214 |
0 | 215 if (!UseOldInlining) { |
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216 if (fail_msg != NULL) { |
0 | 217 *wci_result = *(WarmCallInfo::always_cold()); |
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218 set_msg(fail_msg); |
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219 return true; |
0 | 220 } |
221 | |
222 if (callee_method->has_unloaded_classes_in_signature()) { | |
223 wci_result->set_profit(wci_result->profit() * 0.1); | |
224 } | |
225 | |
226 // don't inline exception code unless the top method belongs to an | |
227 // exception class | |
228 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
229 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); | |
230 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
231 wci_result->set_profit(wci_result->profit() * 0.1); | |
232 } | |
233 } | |
234 | |
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235 if (callee_method->has_compiled_code() && |
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236 callee_method->instructions_size() > InlineSmallCode) { |
0 | 237 wci_result->set_profit(wci_result->profit() * 0.1); |
238 // %%% adjust wci_result->size()? | |
239 } | |
240 | |
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241 return false; |
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242 } |
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243 |
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244 // one more inlining restriction |
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245 if (fail_msg == NULL && callee_method->has_unloaded_classes_in_signature()) { |
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246 fail_msg = "unloaded signature classes"; |
0 | 247 } |
248 | |
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249 if (fail_msg != NULL) { |
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250 set_msg(fail_msg); |
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251 return true; |
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252 } |
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253 |
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254 // ignore heuristic controls on inlining |
7473 | 255 if (callee_method->should_inline()) { |
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256 set_msg("force inline by CompilerOracle"); |
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257 return false; |
0 | 258 } |
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259 if (callee_method->should_not_inline()) { |
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260 set_msg("disallowed by CompilerOracle"); |
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261 return false; |
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262 } |
0 | 263 |
10278 | 264 if (callee_method->should_not_inline()) { |
265 set_msg("disallowed by CompilerOracle"); | |
266 return true; | |
267 } | |
268 | |
269 #ifndef PRODUCT | |
270 if (ciReplay::should_not_inline(callee_method)) { | |
271 set_msg("disallowed by ciReplay"); | |
272 return true; | |
273 } | |
274 #endif | |
275 | |
0 | 276 // Now perform checks which are heuristic |
277 | |
10278 | 278 if (is_unboxing_method(callee_method, C)) { |
279 // Inline unboxing methods. | |
280 return false; | |
281 } | |
282 | |
7473 | 283 if (!callee_method->force_inline()) { |
284 if (callee_method->has_compiled_code() && | |
285 callee_method->instructions_size() > InlineSmallCode) { | |
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286 set_msg("already compiled into a big method"); |
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287 return true; |
7473 | 288 } |
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289 } |
0 | 290 |
291 // don't inline exception code unless the top method belongs to an | |
292 // exception class | |
293 if (caller_tree() != NULL && | |
294 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
295 const InlineTree *top = this; | |
296 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
297 ciInstanceKlass* k = top->method()->holder(); | |
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298 if (!k->is_subclass_of(C->env()->Throwable_klass())) { |
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299 set_msg("exception method"); |
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300 return true; |
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301 } |
0 | 302 } |
303 | |
304 // use frequency-based objections only for non-trivial methods | |
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305 if (callee_method->code_size() <= MaxTrivialSize) { |
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306 return false; |
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307 } |
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308 |
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309 // don't use counts with -Xcomp or CTW |
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310 if (UseInterpreter && !CompileTheWorld) { |
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311 |
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312 if (!callee_method->has_compiled_code() && |
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313 !callee_method->was_executed_more_than(0)) { |
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314 set_msg("never executed"); |
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315 return true; |
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316 } |
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317 |
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318 if (is_init_with_ea(callee_method, caller_method, C)) { |
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319 // Escape Analysis: inline all executed constructors |
10278 | 320 return false; |
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321 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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322 CompileThreshold >> 1))) { |
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323 set_msg("executed < MinInliningThreshold times"); |
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324 return true; |
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325 } |
0 | 326 } |
327 | |
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328 return false; |
0 | 329 } |
330 | |
331 //-----------------------------try_to_inline----------------------------------- | |
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332 // return true if ok |
0 | 333 // Relocated from "InliningClosure::try_to_inline" |
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334 bool InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, |
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335 int caller_bci, ciCallProfile& profile, |
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336 WarmCallInfo* wci_result, bool& should_delay) { |
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337 |
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338 // Old algorithm had funny accumulating BC-size counters |
0 | 339 if (UseOldInlining && ClipInlining |
340 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
7473 | 341 if (!callee_method->force_inline() || !IncrementalInline) { |
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342 set_msg("size > DesiredMethodLimit"); |
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343 return false; |
7473 | 344 } else if (!C->inlining_incrementally()) { |
345 should_delay = true; | |
346 } | |
0 | 347 } |
348 | |
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349 if (!should_inline(callee_method, caller_method, caller_bci, profile, |
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350 wci_result)) { |
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351 return false; |
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352 } |
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353 if (should_not_inline(callee_method, caller_method, wci_result)) { |
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354 return false; |
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355 } |
0 | 356 |
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357 if (InlineAccessors && callee_method->is_accessor()) { |
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358 // accessor methods are not subject to any of the following limits. |
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359 set_msg("accessor"); |
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360 return true; |
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361 } |
0 | 362 |
363 // suppress a few checks for accessors and trivial methods | |
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364 if (callee_method->code_size() > MaxTrivialSize) { |
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365 |
0 | 366 // don't inline into giant methods |
7473 | 367 if (C->over_inlining_cutoff()) { |
368 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form()) | |
369 || !IncrementalInline) { | |
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370 set_msg("NodeCountInliningCutoff"); |
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371 return false; |
7473 | 372 } else { |
373 should_delay = true; | |
374 } | |
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375 } |
0 | 376 |
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377 if ((!UseInterpreter || CompileTheWorld) && |
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378 is_init_with_ea(callee_method, caller_method, C)) { |
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379 |
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380 // Escape Analysis stress testing when running Xcomp or CTW: |
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381 // inline constructors even if they are not reached. |
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382 |
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383 } else if (profile.count() == 0) { |
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384 // don't inline unreached call sites |
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385 set_msg("call site not reached"); |
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386 return false; |
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387 } |
0 | 388 } |
389 | |
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390 if (!C->do_inlining() && InlineAccessors) { |
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391 set_msg("not an accessor"); |
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392 return false; |
41
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393 } |
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394 if (inline_level() > _max_inline_level) { |
7473 | 395 if (!callee_method->force_inline() || !IncrementalInline) { |
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396 set_msg("inlining too deep"); |
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397 return false; |
7473 | 398 } else if (!C->inlining_incrementally()) { |
399 should_delay = true; | |
400 } | |
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401 } |
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402 |
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403 // detect direct and indirect recursive inlining |
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404 if (!callee_method->is_compiled_lambda_form()) { |
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405 // count the current method and the callee |
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406 int inline_level = (method() == callee_method) ? 1 : 0; |
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407 if (inline_level > MaxRecursiveInlineLevel) { |
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408 set_msg("recursively inlining too deep"); |
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409 return false; |
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410 } |
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411 // count callers of current method and callee |
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412 JVMState* jvms = caller_jvms(); |
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413 while (jvms != NULL && jvms->has_method()) { |
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414 if (jvms->method() == callee_method) { |
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415 inline_level++; |
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416 if (inline_level > MaxRecursiveInlineLevel) { |
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417 set_msg("recursively inlining too deep"); |
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418 return false; |
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419 } |
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420 } |
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421 jvms = jvms->caller(); |
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422 } |
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423 } |
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424 |
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425 int size = callee_method->code_size_for_inlining(); |
0 | 426 |
427 if (UseOldInlining && ClipInlining | |
428 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
7473 | 429 if (!callee_method->force_inline() || !IncrementalInline) { |
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430 set_msg("size > DesiredMethodLimit"); |
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431 return false; |
7473 | 432 } else if (!C->inlining_incrementally()) { |
433 should_delay = true; | |
434 } | |
0 | 435 } |
436 | |
437 // ok, inline this method | |
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438 return true; |
0 | 439 } |
440 | |
441 //------------------------------pass_initial_checks---------------------------- | |
442 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
443 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
444 // Check if a callee_method was suggested | |
445 if( callee_method == NULL ) return false; | |
446 // Check if klass of callee_method is loaded | |
447 if( !callee_holder->is_loaded() ) return false; | |
448 if( !callee_holder->is_initialized() ) return false; | |
449 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
450 // Checks that constant pool's call site has been visited | |
451 // stricter than callee_holder->is_initialized() | |
452 ciBytecodeStream iter(caller_method); | |
453 iter.force_bci(caller_bci); | |
454 Bytecodes::Code call_bc = iter.cur_bc(); | |
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455 // An invokedynamic instruction does not have a klass. |
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456 if (call_bc != Bytecodes::_invokedynamic) { |
1565 | 457 int index = iter.get_index_u2_cpcache(); |
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458 if (!caller_method->is_klass_loaded(index, true)) { |
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459 return false; |
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460 } |
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461 // Try to do constant pool resolution if running Xcomp |
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462 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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463 return false; |
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464 } |
0 | 465 } |
466 } | |
467 // We will attempt to see if a class/field/etc got properly loaded. If it | |
468 // did not, it may attempt to throw an exception during our probing. Catch | |
469 // and ignore such exceptions and do not attempt to compile the method. | |
470 if( callee_method->should_exclude() ) return false; | |
471 | |
472 return true; | |
473 } | |
474 | |
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475 //------------------------------check_can_parse-------------------------------- |
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476 const char* InlineTree::check_can_parse(ciMethod* callee) { |
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477 // Certain methods cannot be parsed at all: |
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478 if ( callee->is_native()) return "native method"; |
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479 if ( callee->is_abstract()) return "abstract method"; |
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480 if (!callee->can_be_compiled()) return "not compilable (disabled)"; |
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481 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)"; |
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482 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)"; |
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483 return NULL; |
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484 } |
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485 |
0 | 486 //------------------------------print_inlining--------------------------------- |
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487 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, |
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488 bool success) const { |
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489 const char* inline_msg = msg(); |
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490 assert(inline_msg != NULL, "just checking"); |
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491 if (C->log() != NULL) { |
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492 if (success) { |
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493 C->log()->inline_success(inline_msg); |
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494 } else { |
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495 C->log()->inline_fail(inline_msg); |
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496 } |
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497 } |
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498 if (PrintInlining) { |
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499 C->print_inlining(callee_method, inline_level(), caller_bci, inline_msg); |
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500 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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501 if (Verbose && callee_method) { |
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502 const InlineTree *top = this; |
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503 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } |
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504 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); |
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505 } |
0 | 506 } |
507 } | |
508 | |
509 //------------------------------ok_to_inline----------------------------------- | |
7473 | 510 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) { |
0 | 511 assert(callee_method != NULL, "caller checks for optimized virtual!"); |
7473 | 512 assert(!should_delay, "should be initialized to false"); |
0 | 513 #ifdef ASSERT |
514 // Make sure the incoming jvms has the same information content as me. | |
515 // This means that we can eventually make this whole class AllStatic. | |
516 if (jvms->caller() == NULL) { | |
517 assert(_caller_jvms == NULL, "redundant instance state"); | |
518 } else { | |
519 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
520 } | |
521 assert(_method == jvms->method(), "redundant instance state"); | |
522 #endif | |
523 int caller_bci = jvms->bci(); | |
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524 ciMethod* caller_method = jvms->method(); |
0 | 525 |
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526 // Do some initial checks. |
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527 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) { |
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528 set_msg("failed initial checks"); |
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529 print_inlining(callee_method, caller_bci, false /* !success */); |
0 | 530 return NULL; |
531 } | |
532 | |
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533 // Do some parse checks. |
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534 set_msg(check_can_parse(callee_method)); |
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535 if (msg() != NULL) { |
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536 print_inlining(callee_method, caller_bci, false /* !success */); |
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537 return NULL; |
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538 } |
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539 |
0 | 540 // Check if inlining policy says no. |
541 WarmCallInfo wci = *(initial_wci); | |
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542 bool success = try_to_inline(callee_method, caller_method, caller_bci, |
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543 profile, &wci, should_delay); |
0 | 544 |
545 #ifndef PRODUCT | |
546 if (UseOldInlining && InlineWarmCalls | |
547 && (PrintOpto || PrintOptoInlining || PrintInlining)) { | |
548 bool cold = wci.is_cold(); | |
549 bool hot = !cold && wci.is_hot(); | |
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550 bool old_cold = !success; |
0 | 551 if (old_cold != cold || (Verbose || WizardMode)) { |
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552 if (msg() == NULL) { |
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553 set_msg("OK"); |
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554 } |
0 | 555 tty->print(" OldInlining= %4s : %s\n WCI=", |
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556 old_cold ? "cold" : "hot", msg()); |
0 | 557 wci.print(); |
558 } | |
559 } | |
560 #endif | |
561 if (UseOldInlining) { | |
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562 if (success) { |
0 | 563 wci = *(WarmCallInfo::always_hot()); |
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564 } else { |
0 | 565 wci = *(WarmCallInfo::always_cold()); |
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566 } |
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567 } |
0 | 568 if (!InlineWarmCalls) { |
569 if (!wci.is_cold() && !wci.is_hot()) { | |
570 // Do not inline the warm calls. | |
571 wci = *(WarmCallInfo::always_cold()); | |
572 } | |
573 } | |
574 | |
575 if (!wci.is_cold()) { | |
576 // Inline! | |
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577 if (msg() == NULL) { |
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578 set_msg("inline (hot)"); |
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579 } |
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580 print_inlining(callee_method, caller_bci, true /* success */); |
0 | 581 if (UseOldInlining) |
582 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
583 if (InlineWarmCalls && !wci.is_hot()) | |
584 return new (C) WarmCallInfo(wci); // copy to heap | |
585 return WarmCallInfo::always_hot(); | |
586 } | |
587 | |
588 // Do not inline | |
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589 if (msg() == NULL) { |
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590 set_msg("too cold to inline"); |
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591 } |
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592 print_inlining(callee_method, caller_bci, false /* !success */ ); |
0 | 593 return NULL; |
594 } | |
595 | |
596 //------------------------------compute_callee_frequency----------------------- | |
597 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
598 int count = method()->interpreter_call_site_count(caller_bci); | |
599 int invcnt = method()->interpreter_invocation_count(); | |
600 float freq = (float)count/(float)invcnt; | |
601 // Call-site count / interpreter invocation count, scaled recursively. | |
602 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
603 // total execution time used at this call site. | |
604 | |
605 return freq; | |
606 } | |
607 | |
608 //------------------------------build_inline_tree_for_callee------------------- | |
609 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
610 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
611 // Attempt inlining. | |
612 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
613 if (old_ilt != NULL) { | |
614 return old_ilt; | |
615 } | |
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616 int max_inline_level_adjust = 0; |
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617 if (caller_jvms->method() != NULL) { |
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618 if (caller_jvms->method()->is_compiled_lambda_form()) |
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619 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames |
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620 else if (callee_method->is_method_handle_intrinsic() || |
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621 callee_method->is_compiled_lambda_form()) { |
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622 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem |
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623 } |
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624 if (max_inline_level_adjust != 0 && PrintInlining && (Verbose || WizardMode)) { |
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625 CompileTask::print_inline_indent(inline_level()); |
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626 tty->print_cr(" \\-> discounting inline depth"); |
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627 } |
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628 if (max_inline_level_adjust != 0 && C->log()) { |
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629 int id1 = C->log()->identify(caller_jvms->method()); |
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630 int id2 = C->log()->identify(callee_method); |
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631 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2); |
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632 } |
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633 } |
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634 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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635 _subtrees.append(ilt); |
0 | 636 |
637 NOT_PRODUCT( _count_inlines += 1; ) | |
638 | |
639 return ilt; | |
640 } | |
641 | |
642 | |
643 //---------------------------------------callee_at----------------------------- | |
644 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
645 for (int i = 0; i < _subtrees.length(); i++) { | |
646 InlineTree* sub = _subtrees.at(i); | |
647 if (sub->caller_bci() == bci && callee == sub->method()) { | |
648 return sub; | |
649 } | |
650 } | |
651 return NULL; | |
652 } | |
653 | |
654 | |
655 //------------------------------build_inline_tree_root------------------------- | |
656 InlineTree *InlineTree::build_inline_tree_root() { | |
657 Compile* C = Compile::current(); | |
658 | |
659 // Root of inline tree | |
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660 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel); |
0 | 661 |
662 return ilt; | |
663 } | |
664 | |
665 | |
666 //-------------------------find_subtree_from_root----------------------------- | |
667 // Given a jvms, which determines a call chain from the root method, | |
668 // find the corresponding inline tree. | |
669 // Note: This method will be removed or replaced as InlineTree goes away. | |
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670 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) { |
0 | 671 InlineTree* iltp = root; |
672 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
673 for (uint d = 1; d <= depth; d++) { | |
674 JVMState* jvmsp = jvms->of_depth(d); | |
675 // Select the corresponding subtree for this bci. | |
676 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
677 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
678 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
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679 if (sub == NULL) { |
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680 if (d == depth) { |
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681 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); |
0 | 682 } |
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683 guarantee(sub != NULL, "should be a sub-ilt here"); |
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684 return sub; |
0 | 685 } |
686 iltp = sub; | |
687 } | |
688 return iltp; | |
689 } | |
3939 | 690 |
691 | |
692 | |
693 #ifndef PRODUCT | |
694 void InlineTree::print_impl(outputStream* st, int indent) const { | |
695 for (int i = 0; i < indent; i++) st->print(" "); | |
696 st->print(" @ %d ", caller_bci()); | |
697 method()->print_short_name(st); | |
698 st->cr(); | |
699 | |
700 for (int i = 0 ; i < _subtrees.length(); i++) { | |
701 _subtrees.at(i)->print_impl(st, indent + 2); | |
702 } | |
703 } | |
704 | |
705 void InlineTree::print_value_on(outputStream* st) const { | |
706 print_impl(st, 2); | |
707 } | |
708 #endif |