Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 1138:dd57230ba8fe
6893268: additional dynamic language related optimizations in C2
Summary: C2 needs some additional optimizations to be able to handle MethodHandle invokes and invokedynamic instructions at the best performance.
Reviewed-by: kvn, never
| author | twisti |
|---|---|
| date | Tue, 05 Jan 2010 15:21:25 +0100 |
| parents | 97125851f396 |
| children | c3b315a0d58a |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 844 | 2 * Copyright 1998-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_bytecodeInfo.cpp.incl" | |
| 27 | |
| 28 //============================================================================= | |
| 29 //------------------------------InlineTree------------------------------------- | |
| 30 InlineTree::InlineTree( Compile* c, const InlineTree *caller_tree, ciMethod* callee, JVMState* caller_jvms, int caller_bci, float site_invoke_ratio ) | |
| 31 : C(c), _caller_jvms(caller_jvms), | |
| 32 _caller_tree((InlineTree*)caller_tree), | |
| 33 _method(callee), _site_invoke_ratio(site_invoke_ratio), | |
| 34 _count_inline_bcs(method()->code_size()) { | |
| 35 NOT_PRODUCT(_count_inlines = 0;) | |
| 36 if (_caller_jvms != NULL) { | |
| 37 // Keep a private copy of the caller_jvms: | |
| 38 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); | |
| 39 _caller_jvms->set_bci(caller_jvms->bci()); | |
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40 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); |
| 0 | 41 } |
| 42 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); | |
| 43 assert((caller_tree == NULL ? 0 : caller_tree->inline_depth() + 1) == inline_depth(), "correct (redundant) depth parameter"); | |
| 44 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); | |
| 45 if (UseOldInlining) { | |
| 46 // Update hierarchical counts, count_inline_bcs() and count_inlines() | |
| 47 InlineTree *caller = (InlineTree *)caller_tree; | |
| 48 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { | |
| 49 caller->_count_inline_bcs += count_inline_bcs(); | |
| 50 NOT_PRODUCT(caller->_count_inlines++;) | |
| 51 } | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, float site_invoke_ratio) | |
| 56 : C(c), _caller_jvms(caller_jvms), _caller_tree(NULL), | |
| 57 _method(callee_method), _site_invoke_ratio(site_invoke_ratio), | |
| 58 _count_inline_bcs(method()->code_size()) { | |
| 59 NOT_PRODUCT(_count_inlines = 0;) | |
| 60 assert(!UseOldInlining, "do not use for old stuff"); | |
| 61 } | |
| 62 | |
| 63 | |
| 64 | |
| 65 static void print_indent(int depth) { | |
| 66 tty->print(" "); | |
| 67 for (int i = depth; i != 0; --i) tty->print(" "); | |
| 68 } | |
| 69 | |
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70 static bool is_init_with_ea(ciMethod* callee_method, |
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71 ciMethod* caller_method, Compile* C) { |
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72 // True when EA is ON and a java constructor is called or |
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73 // a super constructor is called from an inlined java constructor. |
| 244 | 74 return C->do_escape_analysis() && EliminateAllocations && |
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75 ( callee_method->is_initializer() || |
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76 (caller_method->is_initializer() && |
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77 caller_method != C->method() && |
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78 caller_method->holder()->is_subclass_of(callee_method->holder())) |
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79 ); |
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80 } |
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81 |
| 0 | 82 // positive filter: should send be inlined? returns NULL, if yes, or rejection msg |
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83 const char* InlineTree::shouldInline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const { |
| 0 | 84 // Allows targeted inlining |
| 85 if(callee_method->should_inline()) { | |
| 86 *wci_result = *(WarmCallInfo::always_hot()); | |
| 87 if (PrintInlining && Verbose) { | |
| 88 print_indent(inline_depth()); | |
| 89 tty->print_cr("Inlined method is hot: "); | |
| 90 } | |
| 91 return NULL; | |
| 92 } | |
| 93 | |
| 94 // positive filter: should send be inlined? returns NULL (--> yes) | |
| 95 // or rejection msg | |
| 96 int max_size = C->max_inline_size(); | |
| 97 int size = callee_method->code_size(); | |
| 98 | |
| 99 // Check for too many throws (and not too huge) | |
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100 if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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101 size < InlineThrowMaxSize ) { |
| 0 | 102 wci_result->set_profit(wci_result->profit() * 100); |
| 103 if (PrintInlining && Verbose) { | |
| 104 print_indent(inline_depth()); | |
| 105 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); | |
| 106 } | |
| 107 return NULL; | |
| 108 } | |
| 109 | |
| 110 if (!UseOldInlining) { | |
| 111 return NULL; // size and frequency are represented in a new way | |
| 112 } | |
| 113 | |
| 114 int call_site_count = method()->scale_count(profile.count()); | |
| 115 int invoke_count = method()->interpreter_invocation_count(); | |
| 116 assert( invoke_count != 0, "Require invokation count greater than zero"); | |
| 117 int freq = call_site_count/invoke_count; | |
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118 |
| 0 | 119 // bump the max size if the call is frequent |
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120 if ((freq >= InlineFrequencyRatio) || |
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121 (call_site_count >= InlineFrequencyCount) || |
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122 is_init_with_ea(callee_method, caller_method, C)) { |
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123 |
| 0 | 124 max_size = C->freq_inline_size(); |
| 125 if (size <= max_size && TraceFrequencyInlining) { | |
| 126 print_indent(inline_depth()); | |
| 127 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); | |
| 128 print_indent(inline_depth()); | |
| 129 callee_method->print(); | |
| 130 tty->cr(); | |
| 131 } | |
| 132 } else { | |
| 133 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. | |
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134 if (callee_method->has_compiled_code() && |
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135 callee_method->instructions_size() > InlineSmallCode/4) |
| 0 | 136 return "already compiled into a medium method"; |
| 137 } | |
| 138 if (size > max_size) { | |
| 139 if (max_size > C->max_inline_size()) | |
| 140 return "hot method too big"; | |
| 141 return "too big"; | |
| 142 } | |
| 143 return NULL; | |
| 144 } | |
| 145 | |
| 146 | |
| 147 // negative filter: should send NOT be inlined? returns NULL, ok to inline, or rejection msg | |
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148 const char* InlineTree::shouldNotInline(ciMethod *callee_method, ciMethod* caller_method, WarmCallInfo* wci_result) const { |
| 0 | 149 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg |
| 150 if (!UseOldInlining) { | |
| 151 const char* fail = NULL; | |
| 152 if (callee_method->is_abstract()) fail = "abstract method"; | |
| 153 // note: we allow ik->is_abstract() | |
| 154 if (!callee_method->holder()->is_initialized()) fail = "method holder not initialized"; | |
| 155 if (callee_method->is_native()) fail = "native method"; | |
| 156 | |
| 157 if (fail) { | |
| 158 *wci_result = *(WarmCallInfo::always_cold()); | |
| 159 return fail; | |
| 160 } | |
| 161 | |
| 162 if (callee_method->has_unloaded_classes_in_signature()) { | |
| 163 wci_result->set_profit(wci_result->profit() * 0.1); | |
| 164 } | |
| 165 | |
| 166 // don't inline exception code unless the top method belongs to an | |
| 167 // exception class | |
| 168 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
| 169 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); | |
| 170 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
| 171 wci_result->set_profit(wci_result->profit() * 0.1); | |
| 172 } | |
| 173 } | |
| 174 | |
| 175 if (callee_method->has_compiled_code() && callee_method->instructions_size() > InlineSmallCode) { | |
| 176 wci_result->set_profit(wci_result->profit() * 0.1); | |
| 177 // %%% adjust wci_result->size()? | |
| 178 } | |
| 179 | |
| 180 return NULL; | |
| 181 } | |
| 182 | |
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183 // Always inline MethodHandle methods. |
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184 if (callee_method->is_method_handle_invoke()) |
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185 return NULL; |
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186 |
| 0 | 187 // First check all inlining restrictions which are required for correctness |
| 188 if (callee_method->is_abstract()) return "abstract method"; | |
| 189 // note: we allow ik->is_abstract() | |
| 190 if (!callee_method->holder()->is_initialized()) return "method holder not initialized"; | |
| 191 if (callee_method->is_native()) return "native method"; | |
| 192 if (callee_method->has_unloaded_classes_in_signature()) return "unloaded signature classes"; | |
| 193 | |
| 194 if (callee_method->should_inline()) { | |
| 195 // ignore heuristic controls on inlining | |
| 196 return NULL; | |
| 197 } | |
| 198 | |
| 199 // Now perform checks which are heuristic | |
| 200 | |
| 201 if( callee_method->has_compiled_code() && callee_method->instructions_size() > InlineSmallCode ) | |
| 202 return "already compiled into a big method"; | |
| 203 | |
| 204 // don't inline exception code unless the top method belongs to an | |
| 205 // exception class | |
| 206 if (caller_tree() != NULL && | |
| 207 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
| 208 const InlineTree *top = this; | |
| 209 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
| 210 ciInstanceKlass* k = top->method()->holder(); | |
| 211 if (!k->is_subclass_of(C->env()->Throwable_klass())) | |
| 212 return "exception method"; | |
| 213 } | |
| 214 | |
| 215 // use frequency-based objections only for non-trivial methods | |
| 216 if (callee_method->code_size() <= MaxTrivialSize) return NULL; | |
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217 |
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218 // don't use counts with -Xcomp or CTW |
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219 if (UseInterpreter && !CompileTheWorld) { |
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220 |
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221 if (!callee_method->has_compiled_code() && |
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222 !callee_method->was_executed_more_than(0)) { |
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223 return "never executed"; |
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224 } |
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225 |
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226 if (is_init_with_ea(callee_method, caller_method, C)) { |
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227 |
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228 // Escape Analysis: inline all executed constructors |
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229 |
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230 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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231 CompileThreshold >> 1))) { |
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232 return "executed < MinInliningThreshold times"; |
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233 } |
| 0 | 234 } |
| 235 | |
| 236 if (callee_method->should_not_inline()) { | |
| 237 return "disallowed by CompilerOracle"; | |
| 238 } | |
| 239 | |
| 675 | 240 if (UseStringCache) { |
| 241 // Do not inline StringCache::profile() method used only at the beginning. | |
| 242 if (callee_method->name() == ciSymbol::profile_name() && | |
| 243 callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { | |
| 244 return "profiling method"; | |
| 245 } | |
| 246 } | |
| 247 | |
| 0 | 248 return NULL; |
| 249 } | |
| 250 | |
| 251 //-----------------------------try_to_inline----------------------------------- | |
| 252 // return NULL if ok, reason for not inlining otherwise | |
| 253 // Relocated from "InliningClosure::try_to_inline" | |
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254 const char* InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) { |
| 0 | 255 |
| 256 // Old algorithm had funny accumulating BC-size counters | |
| 257 if (UseOldInlining && ClipInlining | |
| 258 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
| 259 return "size > DesiredMethodLimit"; | |
| 260 } | |
| 261 | |
| 262 const char *msg = NULL; | |
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263 if ((msg = shouldInline(callee_method, caller_method, caller_bci, |
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264 profile, wci_result)) != NULL) { |
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265 return msg; |
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266 } |
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267 if ((msg = shouldNotInline(callee_method, caller_method, |
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268 wci_result)) != NULL) { |
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269 return msg; |
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270 } |
| 0 | 271 |
| 272 bool is_accessor = InlineAccessors && callee_method->is_accessor(); | |
| 273 | |
| 274 // suppress a few checks for accessors and trivial methods | |
| 275 if (!is_accessor && callee_method->code_size() > MaxTrivialSize) { | |
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276 |
| 0 | 277 // don't inline into giant methods |
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278 if (C->unique() > (uint)NodeCountInliningCutoff) { |
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279 return "NodeCountInliningCutoff"; |
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280 } |
| 0 | 281 |
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282 if ((!UseInterpreter || CompileTheWorld) && |
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283 is_init_with_ea(callee_method, caller_method, C)) { |
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284 |
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285 // Escape Analysis stress testing when running Xcomp or CTW: |
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286 // inline constructors even if they are not reached. |
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287 |
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288 } else if (profile.count() == 0) { |
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289 // don't inline unreached call sites |
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290 return "call site not reached"; |
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291 } |
| 0 | 292 } |
| 293 | |
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294 if (!C->do_inlining() && InlineAccessors && !is_accessor) { |
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295 return "not an accessor"; |
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296 } |
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297 if( inline_depth() > MaxInlineLevel ) { |
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298 return "inlining too deep"; |
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299 } |
| 0 | 300 if( method() == callee_method && |
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301 inline_depth() > MaxRecursiveInlineLevel ) { |
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302 return "recursively inlining too deep"; |
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303 } |
| 0 | 304 |
| 305 int size = callee_method->code_size(); | |
| 306 | |
| 307 if (UseOldInlining && ClipInlining | |
| 308 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
| 309 return "size > DesiredMethodLimit"; | |
| 310 } | |
| 311 | |
| 312 // ok, inline this method | |
| 313 return NULL; | |
| 314 } | |
| 315 | |
| 316 //------------------------------pass_initial_checks---------------------------- | |
| 317 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
| 318 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
| 319 // Check if a callee_method was suggested | |
| 320 if( callee_method == NULL ) return false; | |
| 321 // Check if klass of callee_method is loaded | |
| 322 if( !callee_holder->is_loaded() ) return false; | |
| 323 if( !callee_holder->is_initialized() ) return false; | |
| 324 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
| 325 // Checks that constant pool's call site has been visited | |
| 326 // stricter than callee_holder->is_initialized() | |
| 327 ciBytecodeStream iter(caller_method); | |
| 328 iter.force_bci(caller_bci); | |
| 329 Bytecodes::Code call_bc = iter.cur_bc(); | |
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330 // An invokedynamic instruction does not have a klass. |
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331 if (call_bc != Bytecodes::_invokedynamic) { |
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332 int index = iter.get_index_int(); |
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333 if (!caller_method->is_klass_loaded(index, true)) { |
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334 return false; |
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335 } |
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336 // Try to do constant pool resolution if running Xcomp |
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337 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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338 return false; |
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339 } |
| 0 | 340 } |
| 341 } | |
| 342 // We will attempt to see if a class/field/etc got properly loaded. If it | |
| 343 // did not, it may attempt to throw an exception during our probing. Catch | |
| 344 // and ignore such exceptions and do not attempt to compile the method. | |
| 345 if( callee_method->should_exclude() ) return false; | |
| 346 | |
| 347 return true; | |
| 348 } | |
| 349 | |
| 350 #ifndef PRODUCT | |
| 351 //------------------------------print_inlining--------------------------------- | |
| 352 // Really, the failure_msg can be a success message also. | |
| 353 void InlineTree::print_inlining(ciMethod *callee_method, int caller_bci, const char *failure_msg) const { | |
| 354 print_indent(inline_depth()); | |
| 355 tty->print("@ %d ", caller_bci); | |
| 356 if( callee_method ) callee_method->print_short_name(); | |
| 357 else tty->print(" callee not monotonic or profiled"); | |
| 358 tty->print(" %s", (failure_msg ? failure_msg : "inline")); | |
| 359 if( Verbose && callee_method ) { | |
| 360 const InlineTree *top = this; | |
| 361 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } | |
| 362 tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); | |
| 363 } | |
| 364 tty->cr(); | |
| 365 } | |
| 366 #endif | |
| 367 | |
| 368 //------------------------------ok_to_inline----------------------------------- | |
| 369 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci) { | |
| 370 assert(callee_method != NULL, "caller checks for optimized virtual!"); | |
| 371 #ifdef ASSERT | |
| 372 // Make sure the incoming jvms has the same information content as me. | |
| 373 // This means that we can eventually make this whole class AllStatic. | |
| 374 if (jvms->caller() == NULL) { | |
| 375 assert(_caller_jvms == NULL, "redundant instance state"); | |
| 376 } else { | |
| 377 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
| 378 } | |
| 379 assert(_method == jvms->method(), "redundant instance state"); | |
| 380 #endif | |
| 381 const char *failure_msg = NULL; | |
| 382 int caller_bci = jvms->bci(); | |
| 383 ciMethod *caller_method = jvms->method(); | |
| 384 | |
| 385 if( !pass_initial_checks(caller_method, caller_bci, callee_method)) { | |
| 386 if( PrintInlining ) { | |
| 387 failure_msg = "failed_initial_checks"; | |
| 388 print_inlining( callee_method, caller_bci, failure_msg); | |
| 389 } | |
| 390 return NULL; | |
| 391 } | |
| 392 | |
| 393 // Check if inlining policy says no. | |
| 394 WarmCallInfo wci = *(initial_wci); | |
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395 failure_msg = try_to_inline(callee_method, caller_method, caller_bci, profile, &wci); |
| 0 | 396 if (failure_msg != NULL && C->log() != NULL) { |
| 397 C->log()->begin_elem("inline_fail reason='"); | |
| 398 C->log()->text("%s", failure_msg); | |
| 399 C->log()->end_elem("'"); | |
| 400 } | |
| 401 | |
| 402 #ifndef PRODUCT | |
| 403 if (UseOldInlining && InlineWarmCalls | |
| 404 && (PrintOpto || PrintOptoInlining || PrintInlining)) { | |
| 405 bool cold = wci.is_cold(); | |
| 406 bool hot = !cold && wci.is_hot(); | |
| 407 bool old_cold = (failure_msg != NULL); | |
| 408 if (old_cold != cold || (Verbose || WizardMode)) { | |
| 409 tty->print(" OldInlining= %4s : %s\n WCI=", | |
| 410 old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK"); | |
| 411 wci.print(); | |
| 412 } | |
| 413 } | |
| 414 #endif | |
| 415 if (UseOldInlining) { | |
| 416 if (failure_msg == NULL) | |
| 417 wci = *(WarmCallInfo::always_hot()); | |
| 418 else | |
| 419 wci = *(WarmCallInfo::always_cold()); | |
| 420 } | |
| 421 if (!InlineWarmCalls) { | |
| 422 if (!wci.is_cold() && !wci.is_hot()) { | |
| 423 // Do not inline the warm calls. | |
| 424 wci = *(WarmCallInfo::always_cold()); | |
| 425 } | |
| 426 } | |
| 427 | |
| 428 if (!wci.is_cold()) { | |
| 429 // In -UseOldInlining, the failure_msg may also be a success message. | |
| 430 if (failure_msg == NULL) failure_msg = "inline (hot)"; | |
| 431 | |
| 432 // Inline! | |
| 433 if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); | |
| 434 if (UseOldInlining) | |
| 435 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
| 436 if (InlineWarmCalls && !wci.is_hot()) | |
| 437 return new (C) WarmCallInfo(wci); // copy to heap | |
| 438 return WarmCallInfo::always_hot(); | |
| 439 } | |
| 440 | |
| 441 // Do not inline | |
| 442 if (failure_msg == NULL) failure_msg = "too cold to inline"; | |
| 443 if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); | |
| 444 return NULL; | |
| 445 } | |
| 446 | |
| 447 //------------------------------compute_callee_frequency----------------------- | |
| 448 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
| 449 int count = method()->interpreter_call_site_count(caller_bci); | |
| 450 int invcnt = method()->interpreter_invocation_count(); | |
| 451 float freq = (float)count/(float)invcnt; | |
| 452 // Call-site count / interpreter invocation count, scaled recursively. | |
| 453 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
| 454 // total execution time used at this call site. | |
| 455 | |
| 456 return freq; | |
| 457 } | |
| 458 | |
| 459 //------------------------------build_inline_tree_for_callee------------------- | |
| 460 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
| 461 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
| 462 // Attempt inlining. | |
| 463 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
| 464 if (old_ilt != NULL) { | |
| 465 return old_ilt; | |
| 466 } | |
| 467 InlineTree *ilt = new InlineTree( C, this, callee_method, caller_jvms, caller_bci, recur_frequency ); | |
| 468 _subtrees.append( ilt ); | |
| 469 | |
| 470 NOT_PRODUCT( _count_inlines += 1; ) | |
| 471 | |
| 472 return ilt; | |
| 473 } | |
| 474 | |
| 475 | |
| 476 //---------------------------------------callee_at----------------------------- | |
| 477 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
| 478 for (int i = 0; i < _subtrees.length(); i++) { | |
| 479 InlineTree* sub = _subtrees.at(i); | |
| 480 if (sub->caller_bci() == bci && callee == sub->method()) { | |
| 481 return sub; | |
| 482 } | |
| 483 } | |
| 484 return NULL; | |
| 485 } | |
| 486 | |
| 487 | |
| 488 //------------------------------build_inline_tree_root------------------------- | |
| 489 InlineTree *InlineTree::build_inline_tree_root() { | |
| 490 Compile* C = Compile::current(); | |
| 491 | |
| 492 // Root of inline tree | |
| 493 InlineTree *ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F); | |
| 494 | |
| 495 return ilt; | |
| 496 } | |
| 497 | |
| 498 | |
| 499 //-------------------------find_subtree_from_root----------------------------- | |
| 500 // Given a jvms, which determines a call chain from the root method, | |
| 501 // find the corresponding inline tree. | |
| 502 // Note: This method will be removed or replaced as InlineTree goes away. | |
| 503 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee, bool create_if_not_found) { | |
| 504 InlineTree* iltp = root; | |
| 505 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
| 506 for (uint d = 1; d <= depth; d++) { | |
| 507 JVMState* jvmsp = jvms->of_depth(d); | |
| 508 // Select the corresponding subtree for this bci. | |
| 509 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
| 510 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
| 511 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
| 512 if (!sub) { | |
| 513 if (create_if_not_found && d == depth) { | |
| 514 return iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); | |
| 515 } | |
| 516 assert(sub != NULL, "should be a sub-ilt here"); | |
| 517 return NULL; | |
| 518 } | |
| 519 iltp = sub; | |
| 520 } | |
| 521 return iltp; | |
| 522 } |