Mercurial > hg > graal-compiler
annotate src/share/vm/opto/bytecodeInfo.cpp @ 1585:49fac4acd688
6958485: fix for 6879921 was insufficient
Reviewed-by: kvn
author | never |
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date | Mon, 07 Jun 2010 14:17:01 -0700 |
parents | e9ff18c4ace7 |
children | d5d065957597 |
rev | line source |
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0 | 1 /* |
1579 | 2 * Copyright (c) 1998, 2010, 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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_bytecodeInfo.cpp.incl" | |
27 | |
28 //============================================================================= | |
29 //------------------------------InlineTree------------------------------------- | |
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30 InlineTree::InlineTree( Compile* c, |
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31 const InlineTree *caller_tree, ciMethod* callee, |
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32 JVMState* caller_jvms, int caller_bci, |
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33 float site_invoke_ratio, int site_depth_adjust) |
0 | 34 : C(c), _caller_jvms(caller_jvms), |
35 _caller_tree((InlineTree*)caller_tree), | |
36 _method(callee), _site_invoke_ratio(site_invoke_ratio), | |
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37 _site_depth_adjust(site_depth_adjust), |
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38 _count_inline_bcs(method()->code_size()) |
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39 { |
0 | 40 NOT_PRODUCT(_count_inlines = 0;) |
41 if (_caller_jvms != NULL) { | |
42 // Keep a private copy of the caller_jvms: | |
43 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); | |
44 _caller_jvms->set_bci(caller_jvms->bci()); | |
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45 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); |
0 | 46 } |
47 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); | |
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48 assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter"); |
0 | 49 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); |
50 if (UseOldInlining) { | |
51 // Update hierarchical counts, count_inline_bcs() and count_inlines() | |
52 InlineTree *caller = (InlineTree *)caller_tree; | |
53 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { | |
54 caller->_count_inline_bcs += count_inline_bcs(); | |
55 NOT_PRODUCT(caller->_count_inlines++;) | |
56 } | |
57 } | |
58 } | |
59 | |
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60 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, |
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61 float site_invoke_ratio, int site_depth_adjust) |
0 | 62 : C(c), _caller_jvms(caller_jvms), _caller_tree(NULL), |
63 _method(callee_method), _site_invoke_ratio(site_invoke_ratio), | |
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64 _site_depth_adjust(site_depth_adjust), |
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65 _count_inline_bcs(method()->code_size()) |
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66 { |
0 | 67 NOT_PRODUCT(_count_inlines = 0;) |
68 assert(!UseOldInlining, "do not use for old stuff"); | |
69 } | |
70 | |
71 | |
72 | |
73 static void print_indent(int depth) { | |
74 tty->print(" "); | |
75 for (int i = depth; i != 0; --i) tty->print(" "); | |
76 } | |
77 | |
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78 static bool is_init_with_ea(ciMethod* callee_method, |
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79 ciMethod* caller_method, Compile* C) { |
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80 // True when EA is ON and a java constructor is called or |
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81 // a super constructor is called from an inlined java constructor. |
244 | 82 return C->do_escape_analysis() && EliminateAllocations && |
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83 ( callee_method->is_initializer() || |
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84 (caller_method->is_initializer() && |
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85 caller_method != C->method() && |
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86 caller_method->holder()->is_subclass_of(callee_method->holder())) |
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87 ); |
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88 } |
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89 |
0 | 90 // positive filter: should send be inlined? returns NULL, if yes, or rejection msg |
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91 const char* InlineTree::shouldInline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const { |
0 | 92 // Allows targeted inlining |
93 if(callee_method->should_inline()) { | |
94 *wci_result = *(WarmCallInfo::always_hot()); | |
95 if (PrintInlining && Verbose) { | |
96 print_indent(inline_depth()); | |
97 tty->print_cr("Inlined method is hot: "); | |
98 } | |
99 return NULL; | |
100 } | |
101 | |
102 // positive filter: should send be inlined? returns NULL (--> yes) | |
103 // or rejection msg | |
104 int max_size = C->max_inline_size(); | |
105 int size = callee_method->code_size(); | |
106 | |
107 // Check for too many throws (and not too huge) | |
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108 if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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109 size < InlineThrowMaxSize ) { |
0 | 110 wci_result->set_profit(wci_result->profit() * 100); |
111 if (PrintInlining && Verbose) { | |
112 print_indent(inline_depth()); | |
113 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); | |
114 } | |
115 return NULL; | |
116 } | |
117 | |
118 if (!UseOldInlining) { | |
119 return NULL; // size and frequency are represented in a new way | |
120 } | |
121 | |
122 int call_site_count = method()->scale_count(profile.count()); | |
123 int invoke_count = method()->interpreter_invocation_count(); | |
124 assert( invoke_count != 0, "Require invokation count greater than zero"); | |
125 int freq = call_site_count/invoke_count; | |
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126 |
0 | 127 // bump the max size if the call is frequent |
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128 if ((freq >= InlineFrequencyRatio) || |
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129 (call_site_count >= InlineFrequencyCount) || |
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130 is_init_with_ea(callee_method, caller_method, C)) { |
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131 |
0 | 132 max_size = C->freq_inline_size(); |
133 if (size <= max_size && TraceFrequencyInlining) { | |
134 print_indent(inline_depth()); | |
135 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); | |
136 print_indent(inline_depth()); | |
137 callee_method->print(); | |
138 tty->cr(); | |
139 } | |
140 } else { | |
141 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. | |
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142 if (callee_method->has_compiled_code() && |
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143 callee_method->instructions_size() > InlineSmallCode/4) |
0 | 144 return "already compiled into a medium method"; |
145 } | |
146 if (size > max_size) { | |
147 if (max_size > C->max_inline_size()) | |
148 return "hot method too big"; | |
149 return "too big"; | |
150 } | |
151 return NULL; | |
152 } | |
153 | |
154 | |
155 // negative filter: should send NOT be inlined? returns NULL, ok to inline, or rejection msg | |
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156 const char* InlineTree::shouldNotInline(ciMethod *callee_method, ciMethod* caller_method, WarmCallInfo* wci_result) const { |
0 | 157 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg |
158 if (!UseOldInlining) { | |
159 const char* fail = NULL; | |
160 if (callee_method->is_abstract()) fail = "abstract method"; | |
161 // note: we allow ik->is_abstract() | |
162 if (!callee_method->holder()->is_initialized()) fail = "method holder not initialized"; | |
163 if (callee_method->is_native()) fail = "native method"; | |
164 | |
165 if (fail) { | |
166 *wci_result = *(WarmCallInfo::always_cold()); | |
167 return fail; | |
168 } | |
169 | |
170 if (callee_method->has_unloaded_classes_in_signature()) { | |
171 wci_result->set_profit(wci_result->profit() * 0.1); | |
172 } | |
173 | |
174 // don't inline exception code unless the top method belongs to an | |
175 // exception class | |
176 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
177 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); | |
178 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
179 wci_result->set_profit(wci_result->profit() * 0.1); | |
180 } | |
181 } | |
182 | |
183 if (callee_method->has_compiled_code() && callee_method->instructions_size() > InlineSmallCode) { | |
184 wci_result->set_profit(wci_result->profit() * 0.1); | |
185 // %%% adjust wci_result->size()? | |
186 } | |
187 | |
188 return NULL; | |
189 } | |
190 | |
1564 | 191 // Always inline MethodHandle methods and generated MethodHandle adapters. |
192 if (callee_method->is_method_handle_invoke() || callee_method->is_method_handle_adapter()) | |
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193 return NULL; |
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194 |
0 | 195 // First check all inlining restrictions which are required for correctness |
196 if (callee_method->is_abstract()) return "abstract method"; | |
197 // note: we allow ik->is_abstract() | |
198 if (!callee_method->holder()->is_initialized()) return "method holder not initialized"; | |
199 if (callee_method->is_native()) return "native method"; | |
200 if (callee_method->has_unloaded_classes_in_signature()) return "unloaded signature classes"; | |
201 | |
202 if (callee_method->should_inline()) { | |
203 // ignore heuristic controls on inlining | |
204 return NULL; | |
205 } | |
206 | |
207 // Now perform checks which are heuristic | |
208 | |
209 if( callee_method->has_compiled_code() && callee_method->instructions_size() > InlineSmallCode ) | |
210 return "already compiled into a big method"; | |
211 | |
212 // don't inline exception code unless the top method belongs to an | |
213 // exception class | |
214 if (caller_tree() != NULL && | |
215 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
216 const InlineTree *top = this; | |
217 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
218 ciInstanceKlass* k = top->method()->holder(); | |
219 if (!k->is_subclass_of(C->env()->Throwable_klass())) | |
220 return "exception method"; | |
221 } | |
222 | |
223 // use frequency-based objections only for non-trivial methods | |
224 if (callee_method->code_size() <= MaxTrivialSize) return NULL; | |
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225 |
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226 // don't use counts with -Xcomp or CTW |
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227 if (UseInterpreter && !CompileTheWorld) { |
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228 |
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229 if (!callee_method->has_compiled_code() && |
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230 !callee_method->was_executed_more_than(0)) { |
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231 return "never executed"; |
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232 } |
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233 |
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234 if (is_init_with_ea(callee_method, caller_method, C)) { |
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235 |
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236 // Escape Analysis: inline all executed constructors |
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237 |
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238 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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239 CompileThreshold >> 1))) { |
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240 return "executed < MinInliningThreshold times"; |
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241 } |
0 | 242 } |
243 | |
244 if (callee_method->should_not_inline()) { | |
245 return "disallowed by CompilerOracle"; | |
246 } | |
247 | |
675 | 248 if (UseStringCache) { |
249 // Do not inline StringCache::profile() method used only at the beginning. | |
250 if (callee_method->name() == ciSymbol::profile_name() && | |
251 callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { | |
252 return "profiling method"; | |
253 } | |
254 } | |
255 | |
0 | 256 return NULL; |
257 } | |
258 | |
259 //-----------------------------try_to_inline----------------------------------- | |
260 // return NULL if ok, reason for not inlining otherwise | |
261 // Relocated from "InliningClosure::try_to_inline" | |
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262 const char* InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) { |
0 | 263 |
264 // Old algorithm had funny accumulating BC-size counters | |
265 if (UseOldInlining && ClipInlining | |
266 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
267 return "size > DesiredMethodLimit"; | |
268 } | |
269 | |
270 const char *msg = NULL; | |
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271 if ((msg = shouldInline(callee_method, caller_method, caller_bci, |
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272 profile, wci_result)) != NULL) { |
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273 return msg; |
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274 } |
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275 if ((msg = shouldNotInline(callee_method, caller_method, |
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276 wci_result)) != NULL) { |
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277 return msg; |
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278 } |
0 | 279 |
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280 if (InlineAccessors && callee_method->is_accessor()) { |
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281 // accessor methods are not subject to any of the following limits. |
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282 return NULL; |
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283 } |
0 | 284 |
285 // suppress a few checks for accessors and trivial methods | |
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286 if (callee_method->code_size() > MaxTrivialSize) { |
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287 |
0 | 288 // don't inline into giant methods |
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289 if (C->unique() > (uint)NodeCountInliningCutoff) { |
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290 return "NodeCountInliningCutoff"; |
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291 } |
0 | 292 |
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293 if ((!UseInterpreter || CompileTheWorld) && |
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294 is_init_with_ea(callee_method, caller_method, C)) { |
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295 |
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296 // Escape Analysis stress testing when running Xcomp or CTW: |
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297 // inline constructors even if they are not reached. |
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298 |
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299 } else if (profile.count() == 0) { |
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300 // don't inline unreached call sites |
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301 return "call site not reached"; |
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302 } |
0 | 303 } |
304 | |
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305 if (!C->do_inlining() && InlineAccessors) { |
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306 return "not an accessor"; |
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307 } |
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308 if( inline_depth() > MaxInlineLevel ) { |
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309 return "inlining too deep"; |
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310 } |
0 | 311 if( method() == callee_method && |
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312 inline_depth() > MaxRecursiveInlineLevel ) { |
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313 return "recursively inlining too deep"; |
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314 } |
0 | 315 |
316 int size = callee_method->code_size(); | |
317 | |
318 if (UseOldInlining && ClipInlining | |
319 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
320 return "size > DesiredMethodLimit"; | |
321 } | |
322 | |
323 // ok, inline this method | |
324 return NULL; | |
325 } | |
326 | |
327 //------------------------------pass_initial_checks---------------------------- | |
328 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
329 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
330 // Check if a callee_method was suggested | |
331 if( callee_method == NULL ) return false; | |
332 // Check if klass of callee_method is loaded | |
333 if( !callee_holder->is_loaded() ) return false; | |
334 if( !callee_holder->is_initialized() ) return false; | |
335 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
336 // Checks that constant pool's call site has been visited | |
337 // stricter than callee_holder->is_initialized() | |
338 ciBytecodeStream iter(caller_method); | |
339 iter.force_bci(caller_bci); | |
340 Bytecodes::Code call_bc = iter.cur_bc(); | |
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341 // An invokedynamic instruction does not have a klass. |
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342 if (call_bc != Bytecodes::_invokedynamic) { |
1565 | 343 int index = iter.get_index_u2_cpcache(); |
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344 if (!caller_method->is_klass_loaded(index, true)) { |
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345 return false; |
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346 } |
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347 // Try to do constant pool resolution if running Xcomp |
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348 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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349 return false; |
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350 } |
0 | 351 } |
352 } | |
353 // We will attempt to see if a class/field/etc got properly loaded. If it | |
354 // did not, it may attempt to throw an exception during our probing. Catch | |
355 // and ignore such exceptions and do not attempt to compile the method. | |
356 if( callee_method->should_exclude() ) return false; | |
357 | |
358 return true; | |
359 } | |
360 | |
361 #ifndef PRODUCT | |
362 //------------------------------print_inlining--------------------------------- | |
363 // Really, the failure_msg can be a success message also. | |
364 void InlineTree::print_inlining(ciMethod *callee_method, int caller_bci, const char *failure_msg) const { | |
365 print_indent(inline_depth()); | |
366 tty->print("@ %d ", caller_bci); | |
367 if( callee_method ) callee_method->print_short_name(); | |
368 else tty->print(" callee not monotonic or profiled"); | |
369 tty->print(" %s", (failure_msg ? failure_msg : "inline")); | |
370 if( Verbose && callee_method ) { | |
371 const InlineTree *top = this; | |
372 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } | |
373 tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); | |
374 } | |
375 tty->cr(); | |
376 } | |
377 #endif | |
378 | |
379 //------------------------------ok_to_inline----------------------------------- | |
380 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci) { | |
381 assert(callee_method != NULL, "caller checks for optimized virtual!"); | |
382 #ifdef ASSERT | |
383 // Make sure the incoming jvms has the same information content as me. | |
384 // This means that we can eventually make this whole class AllStatic. | |
385 if (jvms->caller() == NULL) { | |
386 assert(_caller_jvms == NULL, "redundant instance state"); | |
387 } else { | |
388 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
389 } | |
390 assert(_method == jvms->method(), "redundant instance state"); | |
391 #endif | |
392 const char *failure_msg = NULL; | |
393 int caller_bci = jvms->bci(); | |
394 ciMethod *caller_method = jvms->method(); | |
395 | |
396 if( !pass_initial_checks(caller_method, caller_bci, callee_method)) { | |
397 if( PrintInlining ) { | |
398 failure_msg = "failed_initial_checks"; | |
399 print_inlining( callee_method, caller_bci, failure_msg); | |
400 } | |
401 return NULL; | |
402 } | |
403 | |
404 // Check if inlining policy says no. | |
405 WarmCallInfo wci = *(initial_wci); | |
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406 failure_msg = try_to_inline(callee_method, caller_method, caller_bci, profile, &wci); |
0 | 407 if (failure_msg != NULL && C->log() != NULL) { |
408 C->log()->begin_elem("inline_fail reason='"); | |
409 C->log()->text("%s", failure_msg); | |
410 C->log()->end_elem("'"); | |
411 } | |
412 | |
413 #ifndef PRODUCT | |
414 if (UseOldInlining && InlineWarmCalls | |
415 && (PrintOpto || PrintOptoInlining || PrintInlining)) { | |
416 bool cold = wci.is_cold(); | |
417 bool hot = !cold && wci.is_hot(); | |
418 bool old_cold = (failure_msg != NULL); | |
419 if (old_cold != cold || (Verbose || WizardMode)) { | |
420 tty->print(" OldInlining= %4s : %s\n WCI=", | |
421 old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK"); | |
422 wci.print(); | |
423 } | |
424 } | |
425 #endif | |
426 if (UseOldInlining) { | |
427 if (failure_msg == NULL) | |
428 wci = *(WarmCallInfo::always_hot()); | |
429 else | |
430 wci = *(WarmCallInfo::always_cold()); | |
431 } | |
432 if (!InlineWarmCalls) { | |
433 if (!wci.is_cold() && !wci.is_hot()) { | |
434 // Do not inline the warm calls. | |
435 wci = *(WarmCallInfo::always_cold()); | |
436 } | |
437 } | |
438 | |
439 if (!wci.is_cold()) { | |
440 // In -UseOldInlining, the failure_msg may also be a success message. | |
441 if (failure_msg == NULL) failure_msg = "inline (hot)"; | |
442 | |
443 // Inline! | |
444 if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); | |
445 if (UseOldInlining) | |
446 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
447 if (InlineWarmCalls && !wci.is_hot()) | |
448 return new (C) WarmCallInfo(wci); // copy to heap | |
449 return WarmCallInfo::always_hot(); | |
450 } | |
451 | |
452 // Do not inline | |
453 if (failure_msg == NULL) failure_msg = "too cold to inline"; | |
454 if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); | |
455 return NULL; | |
456 } | |
457 | |
458 //------------------------------compute_callee_frequency----------------------- | |
459 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
460 int count = method()->interpreter_call_site_count(caller_bci); | |
461 int invcnt = method()->interpreter_invocation_count(); | |
462 float freq = (float)count/(float)invcnt; | |
463 // Call-site count / interpreter invocation count, scaled recursively. | |
464 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
465 // total execution time used at this call site. | |
466 | |
467 return freq; | |
468 } | |
469 | |
470 //------------------------------build_inline_tree_for_callee------------------- | |
471 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
472 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
473 // Attempt inlining. | |
474 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
475 if (old_ilt != NULL) { | |
476 return old_ilt; | |
477 } | |
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478 int new_depth_adjust = 0; |
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479 if (caller_jvms->method() != NULL) { |
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480 if (caller_jvms->method()->is_method_handle_adapter()) |
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481 new_depth_adjust -= 1; // don't count actions in MH or indy adapter frames |
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482 else if (callee_method->is_method_handle_invoke()) { |
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483 new_depth_adjust -= 1; // don't count method handle calls from java.dyn implem |
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484 } |
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485 if (new_depth_adjust != 0 && PrintInlining) { |
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486 stringStream nm1; caller_jvms->method()->print_name(&nm1); |
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487 stringStream nm2; callee_method->print_name(&nm2); |
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488 tty->print_cr("discounting inlining depth from %s to %s", nm1.base(), nm2.base()); |
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489 } |
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490 if (new_depth_adjust != 0 && C->log()) { |
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491 int id1 = C->log()->identify(caller_jvms->method()); |
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492 int id2 = C->log()->identify(callee_method); |
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493 C->log()->elem("inline_depth_discount caller='%d' callee='%d'", id1, id2); |
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494 } |
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495 } |
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496 InlineTree *ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _site_depth_adjust + new_depth_adjust); |
0 | 497 _subtrees.append( ilt ); |
498 | |
499 NOT_PRODUCT( _count_inlines += 1; ) | |
500 | |
501 return ilt; | |
502 } | |
503 | |
504 | |
505 //---------------------------------------callee_at----------------------------- | |
506 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
507 for (int i = 0; i < _subtrees.length(); i++) { | |
508 InlineTree* sub = _subtrees.at(i); | |
509 if (sub->caller_bci() == bci && callee == sub->method()) { | |
510 return sub; | |
511 } | |
512 } | |
513 return NULL; | |
514 } | |
515 | |
516 | |
517 //------------------------------build_inline_tree_root------------------------- | |
518 InlineTree *InlineTree::build_inline_tree_root() { | |
519 Compile* C = Compile::current(); | |
520 | |
521 // Root of inline tree | |
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522 InlineTree *ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, 0); |
0 | 523 |
524 return ilt; | |
525 } | |
526 | |
527 | |
528 //-------------------------find_subtree_from_root----------------------------- | |
529 // Given a jvms, which determines a call chain from the root method, | |
530 // find the corresponding inline tree. | |
531 // Note: This method will be removed or replaced as InlineTree goes away. | |
532 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee, bool create_if_not_found) { | |
533 InlineTree* iltp = root; | |
534 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
535 for (uint d = 1; d <= depth; d++) { | |
536 JVMState* jvmsp = jvms->of_depth(d); | |
537 // Select the corresponding subtree for this bci. | |
538 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
539 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
540 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
541 if (!sub) { | |
542 if (create_if_not_found && d == depth) { | |
543 return iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); | |
544 } | |
545 assert(sub != NULL, "should be a sub-ilt here"); | |
546 return NULL; | |
547 } | |
548 iltp = sub; | |
549 } | |
550 return iltp; | |
551 } |