Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 9450:ca34e36c53e8
Add loop safepoint elimination
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Tue, 30 Apr 2013 21:38:48 +0200 |
parents | b9a918201d47 |
children | 836a62f43af9 |
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 static bool is_init_with_ea(ciMethod* callee_method, |
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89 ciMethod* caller_method, Compile* C) { |
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90 // True when EA is ON and a java constructor is called or |
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91 // a super constructor is called from an inlined java constructor. |
244 | 92 return C->do_escape_analysis() && EliminateAllocations && |
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93 ( callee_method->is_initializer() || |
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94 (caller_method->is_initializer() && |
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95 caller_method != C->method() && |
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96 caller_method->holder()->is_subclass_of(callee_method->holder())) |
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97 ); |
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98 } |
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99 |
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100 // positive filter: should callee be inlined? |
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101 bool InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, |
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102 int caller_bci, ciCallProfile& profile, |
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103 WarmCallInfo* wci_result) { |
0 | 104 // Allows targeted inlining |
105 if(callee_method->should_inline()) { | |
106 *wci_result = *(WarmCallInfo::always_hot()); | |
107 if (PrintInlining && Verbose) { | |
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108 CompileTask::print_inline_indent(inline_level()); |
0 | 109 tty->print_cr("Inlined method is hot: "); |
110 } | |
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111 set_msg("force inline by CompilerOracle"); |
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112 return true; |
0 | 113 } |
114 | |
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115 int size = callee_method->code_size_for_inlining(); |
0 | 116 |
117 // Check for too many throws (and not too huge) | |
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118 if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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119 size < InlineThrowMaxSize ) { |
0 | 120 wci_result->set_profit(wci_result->profit() * 100); |
121 if (PrintInlining && Verbose) { | |
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122 CompileTask::print_inline_indent(inline_level()); |
0 | 123 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); |
124 } | |
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125 set_msg("many throws"); |
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126 return true; |
0 | 127 } |
128 | |
129 if (!UseOldInlining) { | |
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130 set_msg("!UseOldInlining"); |
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131 return true; // size and frequency are represented in a new way |
0 | 132 } |
133 | |
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134 int default_max_inline_size = C->max_inline_size(); |
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135 int inline_small_code_size = InlineSmallCode / 4; |
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136 int max_inline_size = default_max_inline_size; |
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137 |
0 | 138 int call_site_count = method()->scale_count(profile.count()); |
139 int invoke_count = method()->interpreter_invocation_count(); | |
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140 |
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141 assert(invoke_count != 0, "require invocation count greater than zero"); |
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142 int freq = call_site_count / invoke_count; |
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143 |
0 | 144 // bump the max size if the call is frequent |
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145 if ((freq >= InlineFrequencyRatio) || |
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146 (call_site_count >= InlineFrequencyCount) || |
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147 is_init_with_ea(callee_method, caller_method, C)) { |
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148 |
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149 max_inline_size = C->freq_inline_size(); |
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150 if (size <= max_inline_size && TraceFrequencyInlining) { |
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151 CompileTask::print_inline_indent(inline_level()); |
0 | 152 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); |
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153 CompileTask::print_inline_indent(inline_level()); |
0 | 154 callee_method->print(); |
155 tty->cr(); | |
156 } | |
157 } else { | |
158 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. | |
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159 if (callee_method->has_compiled_code() && |
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160 callee_method->instructions_size() > inline_small_code_size) { |
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161 set_msg("already compiled into a medium method"); |
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162 return false; |
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163 } |
0 | 164 } |
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165 if (size > max_inline_size) { |
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166 if (max_inline_size > default_max_inline_size) { |
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167 set_msg("hot method too big"); |
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168 } else { |
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169 set_msg("too big"); |
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170 } |
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171 return false; |
0 | 172 } |
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173 return true; |
0 | 174 } |
175 | |
176 | |
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177 // negative filter: should callee NOT be inlined? |
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178 bool InlineTree::should_not_inline(ciMethod *callee_method, |
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179 ciMethod* caller_method, |
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180 WarmCallInfo* wci_result) { |
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181 |
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182 const char* fail_msg = NULL; |
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183 |
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184 // First check all inlining restrictions which are required for correctness |
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185 if ( callee_method->is_abstract()) { |
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186 fail_msg = "abstract method"; // // note: we allow ik->is_abstract() |
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187 } else if (!callee_method->holder()->is_initialized()) { |
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188 fail_msg = "method holder not initialized"; |
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189 } else if ( callee_method->is_native()) { |
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190 fail_msg = "native method"; |
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191 } else if ( callee_method->dont_inline()) { |
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192 fail_msg = "don't inline by annotation"; |
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193 } |
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194 |
0 | 195 if (!UseOldInlining) { |
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196 if (fail_msg != NULL) { |
0 | 197 *wci_result = *(WarmCallInfo::always_cold()); |
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198 set_msg(fail_msg); |
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199 return true; |
0 | 200 } |
201 | |
202 if (callee_method->has_unloaded_classes_in_signature()) { | |
203 wci_result->set_profit(wci_result->profit() * 0.1); | |
204 } | |
205 | |
206 // don't inline exception code unless the top method belongs to an | |
207 // exception class | |
208 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
209 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); | |
210 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
211 wci_result->set_profit(wci_result->profit() * 0.1); | |
212 } | |
213 } | |
214 | |
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215 if (callee_method->has_compiled_code() && |
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216 callee_method->instructions_size() > InlineSmallCode) { |
0 | 217 wci_result->set_profit(wci_result->profit() * 0.1); |
218 // %%% adjust wci_result->size()? | |
219 } | |
220 | |
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221 return false; |
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222 } |
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223 |
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224 // one more inlining restriction |
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225 if (fail_msg == NULL && callee_method->has_unloaded_classes_in_signature()) { |
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226 fail_msg = "unloaded signature classes"; |
0 | 227 } |
228 | |
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229 if (fail_msg != NULL) { |
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230 set_msg(fail_msg); |
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231 return true; |
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232 } |
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233 |
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234 // ignore heuristic controls on inlining |
7473 | 235 if (callee_method->should_inline()) { |
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236 set_msg("force inline by CompilerOracle"); |
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237 return false; |
0 | 238 } |
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239 if (callee_method->should_not_inline()) { |
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240 set_msg("disallowed by CompilerOracle"); |
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241 return false; |
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242 } |
0 | 243 |
244 // Now perform checks which are heuristic | |
245 | |
7473 | 246 if (!callee_method->force_inline()) { |
247 if (callee_method->has_compiled_code() && | |
248 callee_method->instructions_size() > InlineSmallCode) { | |
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249 set_msg("already compiled into a big method"); |
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250 return true; |
7473 | 251 } |
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252 } |
0 | 253 |
254 // don't inline exception code unless the top method belongs to an | |
255 // exception class | |
256 if (caller_tree() != NULL && | |
257 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
258 const InlineTree *top = this; | |
259 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
260 ciInstanceKlass* k = top->method()->holder(); | |
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261 if (!k->is_subclass_of(C->env()->Throwable_klass())) { |
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262 set_msg("exception method"); |
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263 return true; |
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264 } |
0 | 265 } |
266 | |
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267 if (callee_method->should_not_inline()) { |
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268 set_msg("disallowed by CompilerOracle"); |
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269 return true; |
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270 } |
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271 |
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272 #ifndef PRODUCT |
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273 if (ciReplay::should_not_inline(callee_method)) { |
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274 set_msg("disallowed by ciReplay"); |
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275 return true; |
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276 } |
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277 #endif |
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278 |
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279 if (UseStringCache) { |
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280 // Do not inline StringCache::profile() method used only at the beginning. |
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281 if (callee_method->name() == ciSymbol::profile_name() && |
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282 callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { |
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283 set_msg("profiling method"); |
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284 return true; |
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285 } |
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286 } |
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287 |
0 | 288 // use frequency-based objections only for non-trivial methods |
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289 if (callee_method->code_size() <= MaxTrivialSize) { |
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290 return false; |
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291 } |
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292 |
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293 // don't use counts with -Xcomp or CTW |
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294 if (UseInterpreter && !CompileTheWorld) { |
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295 |
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296 if (!callee_method->has_compiled_code() && |
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297 !callee_method->was_executed_more_than(0)) { |
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298 set_msg("never executed"); |
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299 return true; |
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300 } |
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301 |
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302 if (is_init_with_ea(callee_method, caller_method, C)) { |
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303 |
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304 // Escape Analysis: inline all executed constructors |
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305 |
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306 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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307 CompileThreshold >> 1))) { |
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308 set_msg("executed < MinInliningThreshold times"); |
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309 return true; |
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310 } |
0 | 311 } |
312 | |
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313 return false; |
0 | 314 } |
315 | |
316 //-----------------------------try_to_inline----------------------------------- | |
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317 // return true if ok |
0 | 318 // Relocated from "InliningClosure::try_to_inline" |
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319 bool InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, |
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320 int caller_bci, ciCallProfile& profile, |
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321 WarmCallInfo* wci_result, bool& should_delay) { |
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322 |
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323 // Old algorithm had funny accumulating BC-size counters |
0 | 324 if (UseOldInlining && ClipInlining |
325 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
7473 | 326 if (!callee_method->force_inline() || !IncrementalInline) { |
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327 set_msg("size > DesiredMethodLimit"); |
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328 return false; |
7473 | 329 } else if (!C->inlining_incrementally()) { |
330 should_delay = true; | |
331 } | |
0 | 332 } |
333 | |
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334 if (!should_inline(callee_method, caller_method, caller_bci, profile, |
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335 wci_result)) { |
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336 return false; |
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337 } |
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338 if (should_not_inline(callee_method, caller_method, wci_result)) { |
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339 return false; |
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340 } |
0 | 341 |
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342 if (InlineAccessors && callee_method->is_accessor()) { |
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343 // accessor methods are not subject to any of the following limits. |
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344 set_msg("accessor"); |
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345 return true; |
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346 } |
0 | 347 |
348 // suppress a few checks for accessors and trivial methods | |
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349 if (callee_method->code_size() > MaxTrivialSize) { |
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350 |
0 | 351 // don't inline into giant methods |
7473 | 352 if (C->over_inlining_cutoff()) { |
353 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form()) | |
354 || !IncrementalInline) { | |
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355 set_msg("NodeCountInliningCutoff"); |
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356 return false; |
7473 | 357 } else { |
358 should_delay = true; | |
359 } | |
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360 } |
0 | 361 |
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362 if ((!UseInterpreter || CompileTheWorld) && |
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363 is_init_with_ea(callee_method, caller_method, C)) { |
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364 |
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365 // Escape Analysis stress testing when running Xcomp or CTW: |
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366 // inline constructors even if they are not reached. |
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367 |
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368 } else if (profile.count() == 0) { |
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369 // don't inline unreached call sites |
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370 set_msg("call site not reached"); |
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371 return false; |
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372 } |
0 | 373 } |
374 | |
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375 if (!C->do_inlining() && InlineAccessors) { |
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376 set_msg("not an accessor"); |
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377 return false; |
41
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378 } |
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379 if (inline_level() > _max_inline_level) { |
7473 | 380 if (!callee_method->force_inline() || !IncrementalInline) { |
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381 set_msg("inlining too deep"); |
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382 return false; |
7473 | 383 } else if (!C->inlining_incrementally()) { |
384 should_delay = true; | |
385 } | |
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386 } |
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387 |
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388 // detect direct and indirect recursive inlining |
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389 if (!callee_method->is_compiled_lambda_form()) { |
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390 // count the current method and the callee |
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391 int inline_level = (method() == callee_method) ? 1 : 0; |
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392 if (inline_level > MaxRecursiveInlineLevel) { |
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393 set_msg("recursively inlining too deep"); |
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394 return false; |
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395 } |
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396 // count callers of current method and callee |
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397 JVMState* jvms = caller_jvms(); |
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398 while (jvms != NULL && jvms->has_method()) { |
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399 if (jvms->method() == callee_method) { |
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400 inline_level++; |
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401 if (inline_level > MaxRecursiveInlineLevel) { |
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402 set_msg("recursively inlining too deep"); |
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403 return false; |
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404 } |
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405 } |
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406 jvms = jvms->caller(); |
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407 } |
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408 } |
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409 |
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410 int size = callee_method->code_size_for_inlining(); |
0 | 411 |
412 if (UseOldInlining && ClipInlining | |
413 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
7473 | 414 if (!callee_method->force_inline() || !IncrementalInline) { |
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415 set_msg("size > DesiredMethodLimit"); |
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416 return false; |
7473 | 417 } else if (!C->inlining_incrementally()) { |
418 should_delay = true; | |
419 } | |
0 | 420 } |
421 | |
422 // ok, inline this method | |
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423 return true; |
0 | 424 } |
425 | |
426 //------------------------------pass_initial_checks---------------------------- | |
427 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
428 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
429 // Check if a callee_method was suggested | |
430 if( callee_method == NULL ) return false; | |
431 // Check if klass of callee_method is loaded | |
432 if( !callee_holder->is_loaded() ) return false; | |
433 if( !callee_holder->is_initialized() ) return false; | |
434 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
435 // Checks that constant pool's call site has been visited | |
436 // stricter than callee_holder->is_initialized() | |
437 ciBytecodeStream iter(caller_method); | |
438 iter.force_bci(caller_bci); | |
439 Bytecodes::Code call_bc = iter.cur_bc(); | |
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440 // An invokedynamic instruction does not have a klass. |
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441 if (call_bc != Bytecodes::_invokedynamic) { |
1565 | 442 int index = iter.get_index_u2_cpcache(); |
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443 if (!caller_method->is_klass_loaded(index, true)) { |
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444 return false; |
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445 } |
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446 // Try to do constant pool resolution if running Xcomp |
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447 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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448 return false; |
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449 } |
0 | 450 } |
451 } | |
452 // We will attempt to see if a class/field/etc got properly loaded. If it | |
453 // did not, it may attempt to throw an exception during our probing. Catch | |
454 // and ignore such exceptions and do not attempt to compile the method. | |
455 if( callee_method->should_exclude() ) return false; | |
456 | |
457 return true; | |
458 } | |
459 | |
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460 //------------------------------check_can_parse-------------------------------- |
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461 const char* InlineTree::check_can_parse(ciMethod* callee) { |
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462 // Certain methods cannot be parsed at all: |
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463 if ( callee->is_native()) return "native method"; |
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464 if ( callee->is_abstract()) return "abstract method"; |
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465 if (!callee->can_be_compiled()) return "not compilable (disabled)"; |
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466 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)"; |
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467 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)"; |
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468 return NULL; |
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469 } |
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470 |
0 | 471 //------------------------------print_inlining--------------------------------- |
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472 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, |
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473 bool success) const { |
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474 const char* inline_msg = msg(); |
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475 assert(inline_msg != NULL, "just checking"); |
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476 if (C->log() != NULL) { |
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477 if (success) { |
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478 C->log()->inline_success(inline_msg); |
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479 } else { |
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480 C->log()->inline_fail(inline_msg); |
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481 } |
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482 } |
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483 if (PrintInlining) { |
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484 C->print_inlining(callee_method, inline_level(), caller_bci, inline_msg); |
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485 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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486 if (Verbose && callee_method) { |
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487 const InlineTree *top = this; |
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488 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } |
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489 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); |
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490 } |
0 | 491 } |
492 } | |
493 | |
494 //------------------------------ok_to_inline----------------------------------- | |
7473 | 495 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) { |
0 | 496 assert(callee_method != NULL, "caller checks for optimized virtual!"); |
7473 | 497 assert(!should_delay, "should be initialized to false"); |
0 | 498 #ifdef ASSERT |
499 // Make sure the incoming jvms has the same information content as me. | |
500 // This means that we can eventually make this whole class AllStatic. | |
501 if (jvms->caller() == NULL) { | |
502 assert(_caller_jvms == NULL, "redundant instance state"); | |
503 } else { | |
504 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
505 } | |
506 assert(_method == jvms->method(), "redundant instance state"); | |
507 #endif | |
508 int caller_bci = jvms->bci(); | |
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509 ciMethod* caller_method = jvms->method(); |
0 | 510 |
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511 // Do some initial checks. |
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512 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) { |
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513 set_msg("failed initial checks"); |
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514 print_inlining(callee_method, caller_bci, false /* !success */); |
0 | 515 return NULL; |
516 } | |
517 | |
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518 // Do some parse checks. |
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519 set_msg(check_can_parse(callee_method)); |
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520 if (msg() != NULL) { |
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521 print_inlining(callee_method, caller_bci, false /* !success */); |
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522 return NULL; |
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523 } |
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524 |
0 | 525 // Check if inlining policy says no. |
526 WarmCallInfo wci = *(initial_wci); | |
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527 bool success = try_to_inline(callee_method, caller_method, caller_bci, |
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528 profile, &wci, should_delay); |
0 | 529 |
530 #ifndef PRODUCT | |
531 if (UseOldInlining && InlineWarmCalls | |
532 && (PrintOpto || PrintOptoInlining || PrintInlining)) { | |
533 bool cold = wci.is_cold(); | |
534 bool hot = !cold && wci.is_hot(); | |
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535 bool old_cold = !success; |
0 | 536 if (old_cold != cold || (Verbose || WizardMode)) { |
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537 if (msg() == NULL) { |
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538 set_msg("OK"); |
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539 } |
0 | 540 tty->print(" OldInlining= %4s : %s\n WCI=", |
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541 old_cold ? "cold" : "hot", msg()); |
0 | 542 wci.print(); |
543 } | |
544 } | |
545 #endif | |
546 if (UseOldInlining) { | |
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547 if (success) { |
0 | 548 wci = *(WarmCallInfo::always_hot()); |
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549 } else { |
0 | 550 wci = *(WarmCallInfo::always_cold()); |
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551 } |
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552 } |
0 | 553 if (!InlineWarmCalls) { |
554 if (!wci.is_cold() && !wci.is_hot()) { | |
555 // Do not inline the warm calls. | |
556 wci = *(WarmCallInfo::always_cold()); | |
557 } | |
558 } | |
559 | |
560 if (!wci.is_cold()) { | |
561 // Inline! | |
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562 if (msg() == NULL) { |
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563 set_msg("inline (hot)"); |
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564 } |
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565 print_inlining(callee_method, caller_bci, true /* success */); |
0 | 566 if (UseOldInlining) |
567 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
568 if (InlineWarmCalls && !wci.is_hot()) | |
569 return new (C) WarmCallInfo(wci); // copy to heap | |
570 return WarmCallInfo::always_hot(); | |
571 } | |
572 | |
573 // Do not inline | |
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574 if (msg() == NULL) { |
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575 set_msg("too cold to inline"); |
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576 } |
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577 print_inlining(callee_method, caller_bci, false /* !success */ ); |
0 | 578 return NULL; |
579 } | |
580 | |
581 //------------------------------compute_callee_frequency----------------------- | |
582 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
583 int count = method()->interpreter_call_site_count(caller_bci); | |
584 int invcnt = method()->interpreter_invocation_count(); | |
585 float freq = (float)count/(float)invcnt; | |
586 // Call-site count / interpreter invocation count, scaled recursively. | |
587 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
588 // total execution time used at this call site. | |
589 | |
590 return freq; | |
591 } | |
592 | |
593 //------------------------------build_inline_tree_for_callee------------------- | |
594 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
595 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
596 // Attempt inlining. | |
597 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
598 if (old_ilt != NULL) { | |
599 return old_ilt; | |
600 } | |
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601 int max_inline_level_adjust = 0; |
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602 if (caller_jvms->method() != NULL) { |
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603 if (caller_jvms->method()->is_compiled_lambda_form()) |
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604 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames |
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605 else if (callee_method->is_method_handle_intrinsic() || |
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606 callee_method->is_compiled_lambda_form()) { |
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607 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem |
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608 } |
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609 if (max_inline_level_adjust != 0 && PrintInlining && (Verbose || WizardMode)) { |
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610 CompileTask::print_inline_indent(inline_level()); |
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611 tty->print_cr(" \\-> discounting inline depth"); |
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612 } |
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613 if (max_inline_level_adjust != 0 && C->log()) { |
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614 int id1 = C->log()->identify(caller_jvms->method()); |
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615 int id2 = C->log()->identify(callee_method); |
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616 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2); |
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617 } |
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618 } |
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619 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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620 _subtrees.append(ilt); |
0 | 621 |
622 NOT_PRODUCT( _count_inlines += 1; ) | |
623 | |
624 return ilt; | |
625 } | |
626 | |
627 | |
628 //---------------------------------------callee_at----------------------------- | |
629 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
630 for (int i = 0; i < _subtrees.length(); i++) { | |
631 InlineTree* sub = _subtrees.at(i); | |
632 if (sub->caller_bci() == bci && callee == sub->method()) { | |
633 return sub; | |
634 } | |
635 } | |
636 return NULL; | |
637 } | |
638 | |
639 | |
640 //------------------------------build_inline_tree_root------------------------- | |
641 InlineTree *InlineTree::build_inline_tree_root() { | |
642 Compile* C = Compile::current(); | |
643 | |
644 // Root of inline tree | |
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645 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel); |
0 | 646 |
647 return ilt; | |
648 } | |
649 | |
650 | |
651 //-------------------------find_subtree_from_root----------------------------- | |
652 // Given a jvms, which determines a call chain from the root method, | |
653 // find the corresponding inline tree. | |
654 // Note: This method will be removed or replaced as InlineTree goes away. | |
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655 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) { |
0 | 656 InlineTree* iltp = root; |
657 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
658 for (uint d = 1; d <= depth; d++) { | |
659 JVMState* jvmsp = jvms->of_depth(d); | |
660 // Select the corresponding subtree for this bci. | |
661 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
662 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
663 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
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664 if (sub == NULL) { |
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665 if (d == depth) { |
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666 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); |
0 | 667 } |
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668 guarantee(sub != NULL, "should be a sub-ilt here"); |
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669 return sub; |
0 | 670 } |
671 iltp = sub; | |
672 } | |
673 return iltp; | |
674 } | |
3939 | 675 |
676 | |
677 | |
678 #ifndef PRODUCT | |
679 void InlineTree::print_impl(outputStream* st, int indent) const { | |
680 for (int i = 0; i < indent; i++) st->print(" "); | |
681 st->print(" @ %d ", caller_bci()); | |
682 method()->print_short_name(st); | |
683 st->cr(); | |
684 | |
685 for (int i = 0 ; i < _subtrees.length(); i++) { | |
686 _subtrees.at(i)->print_impl(st, indent + 2); | |
687 } | |
688 } | |
689 | |
690 void InlineTree::print_value_on(outputStream* st) const { | |
691 print_impl(st, 2); | |
692 } | |
693 #endif |