Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 8390:acc24060b64f
Use implicit null checks for all null checks
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Mon, 18 Mar 2013 14:45:36 +0100 |
parents | b8f261ba79c6 |
children | b9a918201d47 |
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; |
0 | 163 } |
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164 if (size > max_inline_size) { |
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165 if (max_inline_size > default_max_inline_size) { |
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166 set_msg("hot method too big"); |
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167 } else { |
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168 set_msg("too big"); |
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169 } |
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170 return false; |
0 | 171 } |
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172 return true; |
0 | 173 } |
174 | |
175 | |
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176 // negative filter: should callee NOT be inlined? |
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177 bool InlineTree::should_not_inline(ciMethod *callee_method, |
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178 ciMethod* caller_method, |
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179 WarmCallInfo* wci_result) { |
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180 |
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181 const char* fail_msg = NULL; |
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182 |
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183 // First check all inlining restrictions which are required for correctness |
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184 if ( callee_method->is_abstract()) { |
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185 fail_msg = "abstract method"; // // note: we allow ik->is_abstract() |
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186 } else if (!callee_method->holder()->is_initialized()) { |
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187 fail_msg = "method holder not initialized"; |
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188 } else if ( callee_method->is_native()) { |
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189 fail_msg = "native method"; |
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190 } else if ( callee_method->dont_inline()) { |
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191 fail_msg = "don't inline by annotation"; |
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192 } |
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193 |
0 | 194 if (!UseOldInlining) { |
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195 if (fail_msg != NULL) { |
0 | 196 *wci_result = *(WarmCallInfo::always_cold()); |
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197 set_msg(fail_msg); |
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198 return true; |
0 | 199 } |
200 | |
201 if (callee_method->has_unloaded_classes_in_signature()) { | |
202 wci_result->set_profit(wci_result->profit() * 0.1); | |
203 } | |
204 | |
205 // don't inline exception code unless the top method belongs to an | |
206 // exception class | |
207 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
208 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); | |
209 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
210 wci_result->set_profit(wci_result->profit() * 0.1); | |
211 } | |
212 } | |
213 | |
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214 if (callee_method->has_compiled_code() && |
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215 callee_method->instructions_size() > InlineSmallCode) { |
0 | 216 wci_result->set_profit(wci_result->profit() * 0.1); |
217 // %%% adjust wci_result->size()? | |
218 } | |
219 | |
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220 return false; |
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221 } |
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222 |
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223 // one more inlining restriction |
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224 if (fail_msg == NULL && callee_method->has_unloaded_classes_in_signature()) { |
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225 fail_msg = "unloaded signature classes"; |
0 | 226 } |
227 | |
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228 if (fail_msg != NULL) { |
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229 set_msg(fail_msg); |
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230 return true; |
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231 } |
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232 |
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233 // ignore heuristic controls on inlining |
7473 | 234 if (callee_method->should_inline()) { |
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235 set_msg("force inline by CompilerOracle"); |
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236 return false; |
0 | 237 } |
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238 if (callee_method->should_not_inline()) { |
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239 set_msg("disallowed by CompilerOracle"); |
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240 return false; |
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241 } |
0 | 242 |
243 // Now perform checks which are heuristic | |
244 | |
7473 | 245 if (!callee_method->force_inline()) { |
246 if (callee_method->has_compiled_code() && | |
247 callee_method->instructions_size() > InlineSmallCode) { | |
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248 set_msg("already compiled into a big method"); |
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249 return true; |
7473 | 250 } |
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251 } |
0 | 252 |
253 // don't inline exception code unless the top method belongs to an | |
254 // exception class | |
255 if (caller_tree() != NULL && | |
256 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
257 const InlineTree *top = this; | |
258 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
259 ciInstanceKlass* k = top->method()->holder(); | |
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260 if (!k->is_subclass_of(C->env()->Throwable_klass())) { |
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261 set_msg("exception method"); |
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262 return true; |
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263 } |
0 | 264 } |
265 | |
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266 if (callee_method->should_not_inline()) { |
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267 set_msg("disallowed by CompilerOracle"); |
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268 return true; |
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269 } |
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270 |
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271 #ifndef PRODUCT |
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272 if (ciReplay::should_not_inline(callee_method)) { |
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273 set_msg("disallowed by ciReplay"); |
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274 return true; |
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275 } |
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276 #endif |
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277 |
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278 if (UseStringCache) { |
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279 // Do not inline StringCache::profile() method used only at the beginning. |
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280 if (callee_method->name() == ciSymbol::profile_name() && |
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281 callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { |
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282 set_msg("profiling method"); |
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283 return true; |
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284 } |
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285 } |
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286 |
0 | 287 // use frequency-based objections only for non-trivial methods |
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288 if (callee_method->code_size() <= MaxTrivialSize) { |
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289 return false; |
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290 } |
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291 |
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292 // don't use counts with -Xcomp or CTW |
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293 if (UseInterpreter && !CompileTheWorld) { |
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294 |
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295 if (!callee_method->has_compiled_code() && |
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296 !callee_method->was_executed_more_than(0)) { |
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297 set_msg("never executed"); |
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298 return true; |
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299 } |
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300 |
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301 if (is_init_with_ea(callee_method, caller_method, C)) { |
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302 |
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303 // Escape Analysis: inline all executed constructors |
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304 |
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305 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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306 CompileThreshold >> 1))) { |
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307 set_msg("executed < MinInliningThreshold times"); |
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308 return true; |
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309 } |
0 | 310 } |
311 | |
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312 return false; |
0 | 313 } |
314 | |
315 //-----------------------------try_to_inline----------------------------------- | |
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316 // return true if ok |
0 | 317 // Relocated from "InliningClosure::try_to_inline" |
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318 bool InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, |
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319 int caller_bci, ciCallProfile& profile, |
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320 WarmCallInfo* wci_result, bool& should_delay) { |
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321 |
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322 // Old algorithm had funny accumulating BC-size counters |
0 | 323 if (UseOldInlining && ClipInlining |
324 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
7473 | 325 if (!callee_method->force_inline() || !IncrementalInline) { |
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326 set_msg("size > DesiredMethodLimit"); |
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327 return false; |
7473 | 328 } else if (!C->inlining_incrementally()) { |
329 should_delay = true; | |
330 } | |
0 | 331 } |
332 | |
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333 if (!should_inline(callee_method, caller_method, caller_bci, profile, |
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334 wci_result)) { |
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335 return false; |
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336 } |
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337 if (should_not_inline(callee_method, caller_method, wci_result)) { |
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338 return false; |
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339 } |
0 | 340 |
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341 if (InlineAccessors && callee_method->is_accessor()) { |
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342 // accessor methods are not subject to any of the following limits. |
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343 set_msg("accessor"); |
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344 return true; |
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345 } |
0 | 346 |
347 // suppress a few checks for accessors and trivial methods | |
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348 if (callee_method->code_size() > MaxTrivialSize) { |
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349 |
0 | 350 // don't inline into giant methods |
7473 | 351 if (C->over_inlining_cutoff()) { |
352 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form()) | |
353 || !IncrementalInline) { | |
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354 set_msg("NodeCountInliningCutoff"); |
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355 return false; |
7473 | 356 } else { |
357 should_delay = true; | |
358 } | |
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359 } |
0 | 360 |
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361 if ((!UseInterpreter || CompileTheWorld) && |
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362 is_init_with_ea(callee_method, caller_method, C)) { |
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363 |
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364 // Escape Analysis stress testing when running Xcomp or CTW: |
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365 // inline constructors even if they are not reached. |
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366 |
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367 } else if (profile.count() == 0) { |
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368 // don't inline unreached call sites |
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369 set_msg("call site not reached"); |
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370 return false; |
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371 } |
0 | 372 } |
373 | |
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374 if (!C->do_inlining() && InlineAccessors) { |
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375 set_msg("not an accessor"); |
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376 return false; |
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377 } |
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378 if (inline_level() > _max_inline_level) { |
7473 | 379 if (!callee_method->force_inline() || !IncrementalInline) { |
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380 set_msg("inlining too deep"); |
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381 return false; |
7473 | 382 } else if (!C->inlining_incrementally()) { |
383 should_delay = true; | |
384 } | |
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385 } |
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386 |
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387 // detect direct and indirect recursive inlining |
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388 if (!callee_method->is_compiled_lambda_form()) { |
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389 // count the current method and the callee |
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390 int inline_level = (method() == callee_method) ? 1 : 0; |
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391 if (inline_level > MaxRecursiveInlineLevel) { |
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392 set_msg("recursively inlining too deep"); |
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393 return false; |
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394 } |
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395 // count callers of current method and callee |
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396 JVMState* jvms = caller_jvms(); |
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397 while (jvms != NULL && jvms->has_method()) { |
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398 if (jvms->method() == callee_method) { |
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399 inline_level++; |
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400 if (inline_level > MaxRecursiveInlineLevel) { |
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401 set_msg("recursively inlining too deep"); |
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402 return false; |
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403 } |
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404 } |
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405 jvms = jvms->caller(); |
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406 } |
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407 } |
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408 |
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409 int size = callee_method->code_size_for_inlining(); |
0 | 410 |
411 if (UseOldInlining && ClipInlining | |
412 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
7473 | 413 if (!callee_method->force_inline() || !IncrementalInline) { |
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414 set_msg("size > DesiredMethodLimit"); |
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415 return false; |
7473 | 416 } else if (!C->inlining_incrementally()) { |
417 should_delay = true; | |
418 } | |
0 | 419 } |
420 | |
421 // ok, inline this method | |
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422 return true; |
0 | 423 } |
424 | |
425 //------------------------------pass_initial_checks---------------------------- | |
426 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
427 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
428 // Check if a callee_method was suggested | |
429 if( callee_method == NULL ) return false; | |
430 // Check if klass of callee_method is loaded | |
431 if( !callee_holder->is_loaded() ) return false; | |
432 if( !callee_holder->is_initialized() ) return false; | |
433 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
434 // Checks that constant pool's call site has been visited | |
435 // stricter than callee_holder->is_initialized() | |
436 ciBytecodeStream iter(caller_method); | |
437 iter.force_bci(caller_bci); | |
438 Bytecodes::Code call_bc = iter.cur_bc(); | |
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439 // An invokedynamic instruction does not have a klass. |
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440 if (call_bc != Bytecodes::_invokedynamic) { |
1565 | 441 int index = iter.get_index_u2_cpcache(); |
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442 if (!caller_method->is_klass_loaded(index, true)) { |
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443 return false; |
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444 } |
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445 // Try to do constant pool resolution if running Xcomp |
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446 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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447 return false; |
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448 } |
0 | 449 } |
450 } | |
451 // We will attempt to see if a class/field/etc got properly loaded. If it | |
452 // did not, it may attempt to throw an exception during our probing. Catch | |
453 // and ignore such exceptions and do not attempt to compile the method. | |
454 if( callee_method->should_exclude() ) return false; | |
455 | |
456 return true; | |
457 } | |
458 | |
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459 //------------------------------check_can_parse-------------------------------- |
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460 const char* InlineTree::check_can_parse(ciMethod* callee) { |
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461 // Certain methods cannot be parsed at all: |
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462 if ( callee->is_native()) return "native method"; |
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463 if ( callee->is_abstract()) return "abstract method"; |
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464 if (!callee->can_be_compiled()) return "not compilable (disabled)"; |
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465 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)"; |
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466 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)"; |
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467 return NULL; |
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468 } |
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469 |
0 | 470 //------------------------------print_inlining--------------------------------- |
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471 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, |
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472 bool success) const { |
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473 const char* inline_msg = msg(); |
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474 assert(inline_msg != NULL, "just checking"); |
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475 if (C->log() != NULL) { |
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476 if (success) { |
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477 C->log()->inline_success(inline_msg); |
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478 } else { |
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479 C->log()->inline_fail(inline_msg); |
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480 } |
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481 } |
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482 if (PrintInlining) { |
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483 C->print_inlining(callee_method, inline_level(), caller_bci, inline_msg); |
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484 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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485 if (Verbose && callee_method) { |
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486 const InlineTree *top = this; |
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487 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } |
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488 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); |
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489 } |
0 | 490 } |
491 } | |
492 | |
493 //------------------------------ok_to_inline----------------------------------- | |
7473 | 494 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) { |
0 | 495 assert(callee_method != NULL, "caller checks for optimized virtual!"); |
7473 | 496 assert(!should_delay, "should be initialized to false"); |
0 | 497 #ifdef ASSERT |
498 // Make sure the incoming jvms has the same information content as me. | |
499 // This means that we can eventually make this whole class AllStatic. | |
500 if (jvms->caller() == NULL) { | |
501 assert(_caller_jvms == NULL, "redundant instance state"); | |
502 } else { | |
503 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
504 } | |
505 assert(_method == jvms->method(), "redundant instance state"); | |
506 #endif | |
507 int caller_bci = jvms->bci(); | |
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508 ciMethod* caller_method = jvms->method(); |
0 | 509 |
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510 // Do some initial checks. |
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511 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) { |
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512 set_msg("failed initial checks"); |
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513 print_inlining(callee_method, caller_bci, false /* !success */); |
0 | 514 return NULL; |
515 } | |
516 | |
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517 // Do some parse checks. |
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518 set_msg(check_can_parse(callee_method)); |
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519 if (msg() != NULL) { |
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520 print_inlining(callee_method, caller_bci, false /* !success */); |
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521 return NULL; |
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522 } |
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523 |
0 | 524 // Check if inlining policy says no. |
525 WarmCallInfo wci = *(initial_wci); | |
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526 bool success = try_to_inline(callee_method, caller_method, caller_bci, |
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527 profile, &wci, should_delay); |
0 | 528 |
529 #ifndef PRODUCT | |
530 if (UseOldInlining && InlineWarmCalls | |
531 && (PrintOpto || PrintOptoInlining || PrintInlining)) { | |
532 bool cold = wci.is_cold(); | |
533 bool hot = !cold && wci.is_hot(); | |
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534 bool old_cold = !success; |
0 | 535 if (old_cold != cold || (Verbose || WizardMode)) { |
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536 if (msg() == NULL) { |
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537 set_msg("OK"); |
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538 } |
0 | 539 tty->print(" OldInlining= %4s : %s\n WCI=", |
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540 old_cold ? "cold" : "hot", msg()); |
0 | 541 wci.print(); |
542 } | |
543 } | |
544 #endif | |
545 if (UseOldInlining) { | |
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546 if (success) { |
0 | 547 wci = *(WarmCallInfo::always_hot()); |
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548 } else { |
0 | 549 wci = *(WarmCallInfo::always_cold()); |
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550 } |
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551 } |
0 | 552 if (!InlineWarmCalls) { |
553 if (!wci.is_cold() && !wci.is_hot()) { | |
554 // Do not inline the warm calls. | |
555 wci = *(WarmCallInfo::always_cold()); | |
556 } | |
557 } | |
558 | |
559 if (!wci.is_cold()) { | |
560 // Inline! | |
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561 if (msg() == NULL) { |
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562 set_msg("inline (hot)"); |
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563 } |
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564 print_inlining(callee_method, caller_bci, true /* success */); |
0 | 565 if (UseOldInlining) |
566 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
567 if (InlineWarmCalls && !wci.is_hot()) | |
568 return new (C) WarmCallInfo(wci); // copy to heap | |
569 return WarmCallInfo::always_hot(); | |
570 } | |
571 | |
572 // Do not inline | |
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573 if (msg() == NULL) { |
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574 set_msg("too cold to inline"); |
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575 } |
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576 print_inlining(callee_method, caller_bci, false /* !success */ ); |
0 | 577 return NULL; |
578 } | |
579 | |
580 //------------------------------compute_callee_frequency----------------------- | |
581 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
582 int count = method()->interpreter_call_site_count(caller_bci); | |
583 int invcnt = method()->interpreter_invocation_count(); | |
584 float freq = (float)count/(float)invcnt; | |
585 // Call-site count / interpreter invocation count, scaled recursively. | |
586 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
587 // total execution time used at this call site. | |
588 | |
589 return freq; | |
590 } | |
591 | |
592 //------------------------------build_inline_tree_for_callee------------------- | |
593 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
594 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
595 // Attempt inlining. | |
596 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
597 if (old_ilt != NULL) { | |
598 return old_ilt; | |
599 } | |
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600 int max_inline_level_adjust = 0; |
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601 if (caller_jvms->method() != NULL) { |
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602 if (caller_jvms->method()->is_compiled_lambda_form()) |
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603 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames |
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604 else if (callee_method->is_method_handle_intrinsic() || |
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605 callee_method->is_compiled_lambda_form()) { |
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606 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem |
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607 } |
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608 if (max_inline_level_adjust != 0 && PrintInlining && (Verbose || WizardMode)) { |
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609 CompileTask::print_inline_indent(inline_level()); |
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610 tty->print_cr(" \\-> discounting inline depth"); |
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611 } |
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612 if (max_inline_level_adjust != 0 && C->log()) { |
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613 int id1 = C->log()->identify(caller_jvms->method()); |
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614 int id2 = C->log()->identify(callee_method); |
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615 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2); |
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616 } |
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617 } |
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618 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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619 _subtrees.append(ilt); |
0 | 620 |
621 NOT_PRODUCT( _count_inlines += 1; ) | |
622 | |
623 return ilt; | |
624 } | |
625 | |
626 | |
627 //---------------------------------------callee_at----------------------------- | |
628 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
629 for (int i = 0; i < _subtrees.length(); i++) { | |
630 InlineTree* sub = _subtrees.at(i); | |
631 if (sub->caller_bci() == bci && callee == sub->method()) { | |
632 return sub; | |
633 } | |
634 } | |
635 return NULL; | |
636 } | |
637 | |
638 | |
639 //------------------------------build_inline_tree_root------------------------- | |
640 InlineTree *InlineTree::build_inline_tree_root() { | |
641 Compile* C = Compile::current(); | |
642 | |
643 // Root of inline tree | |
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644 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel); |
0 | 645 |
646 return ilt; | |
647 } | |
648 | |
649 | |
650 //-------------------------find_subtree_from_root----------------------------- | |
651 // Given a jvms, which determines a call chain from the root method, | |
652 // find the corresponding inline tree. | |
653 // Note: This method will be removed or replaced as InlineTree goes away. | |
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654 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) { |
0 | 655 InlineTree* iltp = root; |
656 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
657 for (uint d = 1; d <= depth; d++) { | |
658 JVMState* jvmsp = jvms->of_depth(d); | |
659 // Select the corresponding subtree for this bci. | |
660 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
661 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
662 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
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663 if (sub == NULL) { |
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664 if (d == depth) { |
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665 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); |
0 | 666 } |
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667 guarantee(sub != NULL, "should be a sub-ilt here"); |
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668 return sub; |
0 | 669 } |
670 iltp = sub; | |
671 } | |
672 return iltp; | |
673 } | |
3939 | 674 |
675 | |
676 | |
677 #ifndef PRODUCT | |
678 void InlineTree::print_impl(outputStream* st, int indent) const { | |
679 for (int i = 0; i < indent; i++) st->print(" "); | |
680 st->print(" @ %d ", caller_bci()); | |
681 method()->print_short_name(st); | |
682 st->cr(); | |
683 | |
684 for (int i = 0 ; i < _subtrees.length(); i++) { | |
685 _subtrees.at(i)->print_impl(st, indent + 2); | |
686 } | |
687 } | |
688 | |
689 void InlineTree::print_value_on(outputStream* st) const { | |
690 print_impl(st, 2); | |
691 } | |
692 #endif |