src/share/vm/opto/bytecodeInfo.cpp

Sun, 23 Dec 2012 17:08:22 +0100

author
roland
date
Sun, 23 Dec 2012 17:08:22 +0100
changeset 4409
d092d1b31229
parent 4357
ad5dd04754ee
child 4532
60bba1398c51
permissions
-rw-r--r--

8005071: Incremental inlining for JSR 292
Summary: post parse inlining driven by number of live nodes.
Reviewed-by: twisti, kvn, jrose

duke@435 1 /*
mikael@4153 2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435 4 *
duke@435 5 * This code is free software; you can redistribute it and/or modify it
duke@435 6 * under the terms of the GNU General Public License version 2 only, as
duke@435 7 * published by the Free Software Foundation.
duke@435 8 *
duke@435 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@435 13 * accompanied this code).
duke@435 14 *
duke@435 15 * You should have received a copy of the GNU General Public License version
duke@435 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@435 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435 18 *
trims@1907 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907 20 * or visit www.oracle.com if you need additional information or have any
trims@1907 21 * questions.
duke@435 22 *
duke@435 23 */
duke@435 24
stefank@2314 25 #include "precompiled.hpp"
minqi@4267 26 #include "ci/ciReplay.hpp"
stefank@2314 27 #include "classfile/systemDictionary.hpp"
stefank@2314 28 #include "classfile/vmSymbols.hpp"
twisti@2687 29 #include "compiler/compileBroker.hpp"
stefank@2314 30 #include "compiler/compileLog.hpp"
stefank@2314 31 #include "interpreter/linkResolver.hpp"
stefank@2314 32 #include "oops/objArrayKlass.hpp"
stefank@2314 33 #include "opto/callGenerator.hpp"
stefank@2314 34 #include "opto/parse.hpp"
stefank@2314 35 #include "runtime/handles.inline.hpp"
duke@435 36
duke@435 37 //=============================================================================
duke@435 38 //------------------------------InlineTree-------------------------------------
never@2981 39 InlineTree::InlineTree(Compile* c,
never@2981 40 const InlineTree *caller_tree, ciMethod* callee,
never@2981 41 JVMState* caller_jvms, int caller_bci,
never@2981 42 float site_invoke_ratio, int max_inline_level) :
never@2981 43 C(c),
never@2981 44 _caller_jvms(caller_jvms),
never@2981 45 _caller_tree((InlineTree*) caller_tree),
never@2981 46 _method(callee),
never@2981 47 _site_invoke_ratio(site_invoke_ratio),
never@2981 48 _max_inline_level(max_inline_level),
roland@4409 49 _count_inline_bcs(method()->code_size_for_inlining()),
roland@4409 50 _subtrees(c->comp_arena(), 2, 0, NULL)
jrose@1592 51 {
duke@435 52 NOT_PRODUCT(_count_inlines = 0;)
duke@435 53 if (_caller_jvms != NULL) {
duke@435 54 // Keep a private copy of the caller_jvms:
duke@435 55 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms());
duke@435 56 _caller_jvms->set_bci(caller_jvms->bci());
cfang@1335 57 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining");
duke@435 58 }
duke@435 59 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS");
jrose@1592 60 assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter");
duke@435 61 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter");
duke@435 62 if (UseOldInlining) {
duke@435 63 // Update hierarchical counts, count_inline_bcs() and count_inlines()
duke@435 64 InlineTree *caller = (InlineTree *)caller_tree;
duke@435 65 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) {
duke@435 66 caller->_count_inline_bcs += count_inline_bcs();
duke@435 67 NOT_PRODUCT(caller->_count_inlines++;)
duke@435 68 }
duke@435 69 }
duke@435 70 }
duke@435 71
jrose@1592 72 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms,
never@2981 73 float site_invoke_ratio, int max_inline_level) :
never@2981 74 C(c),
never@2981 75 _caller_jvms(caller_jvms),
never@2981 76 _caller_tree(NULL),
never@2981 77 _method(callee_method),
never@2981 78 _site_invoke_ratio(site_invoke_ratio),
never@2981 79 _max_inline_level(max_inline_level),
jrose@1592 80 _count_inline_bcs(method()->code_size())
jrose@1592 81 {
duke@435 82 NOT_PRODUCT(_count_inlines = 0;)
duke@435 83 assert(!UseOldInlining, "do not use for old stuff");
duke@435 84 }
duke@435 85
kvn@476 86 static bool is_init_with_ea(ciMethod* callee_method,
kvn@476 87 ciMethod* caller_method, Compile* C) {
kvn@476 88 // True when EA is ON and a java constructor is called or
kvn@476 89 // a super constructor is called from an inlined java constructor.
kvn@679 90 return C->do_escape_analysis() && EliminateAllocations &&
kvn@476 91 ( callee_method->is_initializer() ||
kvn@476 92 (caller_method->is_initializer() &&
kvn@476 93 caller_method != C->method() &&
kvn@476 94 caller_method->holder()->is_subclass_of(callee_method->holder()))
kvn@476 95 );
kvn@476 96 }
kvn@476 97
twisti@3969 98 // positive filter: should callee be inlined? returns NULL, if yes, or rejection msg
twisti@2898 99 const char* InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const {
duke@435 100 // Allows targeted inlining
duke@435 101 if(callee_method->should_inline()) {
duke@435 102 *wci_result = *(WarmCallInfo::always_hot());
duke@435 103 if (PrintInlining && Verbose) {
never@2981 104 CompileTask::print_inline_indent(inline_level());
duke@435 105 tty->print_cr("Inlined method is hot: ");
duke@435 106 }
duke@435 107 return NULL;
duke@435 108 }
duke@435 109
duke@435 110 // positive filter: should send be inlined? returns NULL (--> yes)
duke@435 111 // or rejection msg
twisti@3097 112 int size = callee_method->code_size_for_inlining();
duke@435 113
duke@435 114 // Check for too many throws (and not too huge)
kvn@476 115 if(callee_method->interpreter_throwout_count() > InlineThrowCount &&
kvn@476 116 size < InlineThrowMaxSize ) {
duke@435 117 wci_result->set_profit(wci_result->profit() * 100);
duke@435 118 if (PrintInlining && Verbose) {
never@2981 119 CompileTask::print_inline_indent(inline_level());
duke@435 120 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count());
duke@435 121 }
duke@435 122 return NULL;
duke@435 123 }
duke@435 124
duke@435 125 if (!UseOldInlining) {
duke@435 126 return NULL; // size and frequency are represented in a new way
duke@435 127 }
duke@435 128
twisti@2898 129 int default_max_inline_size = C->max_inline_size();
twisti@2898 130 int inline_small_code_size = InlineSmallCode / 4;
twisti@2898 131 int max_inline_size = default_max_inline_size;
twisti@2898 132
duke@435 133 int call_site_count = method()->scale_count(profile.count());
duke@435 134 int invoke_count = method()->interpreter_invocation_count();
twisti@2898 135
twisti@2898 136 assert(invoke_count != 0, "require invocation count greater than zero");
twisti@2898 137 int freq = call_site_count / invoke_count;
kvn@476 138
duke@435 139 // bump the max size if the call is frequent
kvn@476 140 if ((freq >= InlineFrequencyRatio) ||
kvn@476 141 (call_site_count >= InlineFrequencyCount) ||
kvn@476 142 is_init_with_ea(callee_method, caller_method, C)) {
kvn@476 143
twisti@2898 144 max_inline_size = C->freq_inline_size();
twisti@2898 145 if (size <= max_inline_size && TraceFrequencyInlining) {
never@2981 146 CompileTask::print_inline_indent(inline_level());
duke@435 147 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count);
never@2981 148 CompileTask::print_inline_indent(inline_level());
duke@435 149 callee_method->print();
duke@435 150 tty->cr();
duke@435 151 }
duke@435 152 } else {
duke@435 153 // Not hot. Check for medium-sized pre-existing nmethod at cold sites.
kvn@476 154 if (callee_method->has_compiled_code() &&
minqi@4267 155 callee_method->instructions_size() > inline_small_code_size)
duke@435 156 return "already compiled into a medium method";
duke@435 157 }
twisti@2898 158 if (size > max_inline_size) {
twisti@2898 159 if (max_inline_size > default_max_inline_size)
duke@435 160 return "hot method too big";
duke@435 161 return "too big";
duke@435 162 }
duke@435 163 return NULL;
duke@435 164 }
duke@435 165
duke@435 166
twisti@3969 167 // negative filter: should callee NOT be inlined? returns NULL, ok to inline, or rejection msg
twisti@2898 168 const char* InlineTree::should_not_inline(ciMethod *callee_method, ciMethod* caller_method, WarmCallInfo* wci_result) const {
duke@435 169 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg
duke@435 170 if (!UseOldInlining) {
duke@435 171 const char* fail = NULL;
twisti@3969 172 if ( callee_method->is_abstract()) fail = "abstract method";
duke@435 173 // note: we allow ik->is_abstract()
twisti@3969 174 if (!callee_method->holder()->is_initialized()) fail = "method holder not initialized";
twisti@3969 175 if ( callee_method->is_native()) fail = "native method";
twisti@3969 176 if ( callee_method->dont_inline()) fail = "don't inline by annotation";
duke@435 177
duke@435 178 if (fail) {
duke@435 179 *wci_result = *(WarmCallInfo::always_cold());
duke@435 180 return fail;
duke@435 181 }
duke@435 182
duke@435 183 if (callee_method->has_unloaded_classes_in_signature()) {
duke@435 184 wci_result->set_profit(wci_result->profit() * 0.1);
duke@435 185 }
duke@435 186
duke@435 187 // don't inline exception code unless the top method belongs to an
duke@435 188 // exception class
duke@435 189 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
duke@435 190 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method();
duke@435 191 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
duke@435 192 wci_result->set_profit(wci_result->profit() * 0.1);
duke@435 193 }
duke@435 194 }
duke@435 195
twisti@3969 196 if (callee_method->has_compiled_code() &&
minqi@4267 197 callee_method->instructions_size() > InlineSmallCode) {
duke@435 198 wci_result->set_profit(wci_result->profit() * 0.1);
duke@435 199 // %%% adjust wci_result->size()?
duke@435 200 }
duke@435 201
duke@435 202 return NULL;
duke@435 203 }
duke@435 204
twisti@3969 205 // First check all inlining restrictions which are required for correctness
twisti@3969 206 if ( callee_method->is_abstract()) return "abstract method";
twisti@3969 207 // note: we allow ik->is_abstract()
twisti@3969 208 if (!callee_method->holder()->is_initialized()) return "method holder not initialized";
twisti@3969 209 if ( callee_method->is_native()) return "native method";
twisti@3969 210 if ( callee_method->dont_inline()) return "don't inline by annotation";
twisti@3969 211 if ( callee_method->has_unloaded_classes_in_signature()) return "unloaded signature classes";
twisti@1573 212
roland@4409 213 if (callee_method->should_inline()) {
duke@435 214 // ignore heuristic controls on inlining
duke@435 215 return NULL;
duke@435 216 }
duke@435 217
duke@435 218 // Now perform checks which are heuristic
duke@435 219
roland@4409 220 if (!callee_method->force_inline()) {
roland@4409 221 if (callee_method->has_compiled_code() &&
roland@4409 222 callee_method->instructions_size() > InlineSmallCode) {
duke@435 223 return "already compiled into a big method";
roland@4409 224 }
twisti@3969 225 }
duke@435 226
duke@435 227 // don't inline exception code unless the top method belongs to an
duke@435 228 // exception class
duke@435 229 if (caller_tree() != NULL &&
duke@435 230 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
duke@435 231 const InlineTree *top = this;
duke@435 232 while (top->caller_tree() != NULL) top = top->caller_tree();
duke@435 233 ciInstanceKlass* k = top->method()->holder();
duke@435 234 if (!k->is_subclass_of(C->env()->Throwable_klass()))
duke@435 235 return "exception method";
duke@435 236 }
duke@435 237
never@3653 238 if (callee_method->should_not_inline()) {
never@3653 239 return "disallowed by CompilerOracle";
never@3653 240 }
never@3653 241
minqi@4267 242 #ifndef PRODUCT
minqi@4267 243 if (ciReplay::should_not_inline(callee_method)) {
minqi@4267 244 return "disallowed by ciReplay";
minqi@4267 245 }
minqi@4267 246 #endif
minqi@4267 247
never@3653 248 if (UseStringCache) {
never@3653 249 // Do not inline StringCache::profile() method used only at the beginning.
never@3653 250 if (callee_method->name() == ciSymbol::profile_name() &&
never@3653 251 callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) {
never@3653 252 return "profiling method";
never@3653 253 }
never@3653 254 }
never@3653 255
duke@435 256 // use frequency-based objections only for non-trivial methods
twisti@3969 257 if (callee_method->code_size() <= MaxTrivialSize) return NULL;
kvn@476 258
kvn@476 259 // don't use counts with -Xcomp or CTW
kvn@476 260 if (UseInterpreter && !CompileTheWorld) {
kvn@476 261
kvn@476 262 if (!callee_method->has_compiled_code() &&
kvn@476 263 !callee_method->was_executed_more_than(0)) {
kvn@476 264 return "never executed";
kvn@476 265 }
kvn@476 266
kvn@476 267 if (is_init_with_ea(callee_method, caller_method, C)) {
kvn@476 268
kvn@476 269 // Escape Analysis: inline all executed constructors
kvn@476 270
kvn@476 271 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold,
kvn@476 272 CompileThreshold >> 1))) {
kvn@476 273 return "executed < MinInliningThreshold times";
kvn@476 274 }
duke@435 275 }
duke@435 276
duke@435 277 return NULL;
duke@435 278 }
duke@435 279
duke@435 280 //-----------------------------try_to_inline-----------------------------------
duke@435 281 // return NULL if ok, reason for not inlining otherwise
duke@435 282 // Relocated from "InliningClosure::try_to_inline"
roland@4409 283 const char* InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result, bool& should_delay) {
duke@435 284 // Old algorithm had funny accumulating BC-size counters
duke@435 285 if (UseOldInlining && ClipInlining
duke@435 286 && (int)count_inline_bcs() >= DesiredMethodLimit) {
roland@4409 287 if (!callee_method->force_inline() || !IncrementalInline) {
roland@4409 288 return "size > DesiredMethodLimit";
roland@4409 289 } else if (!C->inlining_incrementally()) {
roland@4409 290 should_delay = true;
roland@4409 291 }
duke@435 292 }
duke@435 293
duke@435 294 const char *msg = NULL;
twisti@2898 295 msg = should_inline(callee_method, caller_method, caller_bci, profile, wci_result);
twisti@2898 296 if (msg != NULL)
kvn@476 297 return msg;
twisti@2898 298
twisti@2898 299 msg = should_not_inline(callee_method, caller_method, wci_result);
twisti@2898 300 if (msg != NULL)
kvn@476 301 return msg;
duke@435 302
jrose@1592 303 if (InlineAccessors && callee_method->is_accessor()) {
jrose@1592 304 // accessor methods are not subject to any of the following limits.
jrose@1592 305 return NULL;
jrose@1592 306 }
duke@435 307
duke@435 308 // suppress a few checks for accessors and trivial methods
twisti@3969 309 if (callee_method->code_size() > MaxTrivialSize) {
kvn@476 310
duke@435 311 // don't inline into giant methods
roland@4409 312 if (C->over_inlining_cutoff()) {
roland@4409 313 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form())
roland@4409 314 || !IncrementalInline) {
roland@4409 315 return "NodeCountInliningCutoff";
roland@4409 316 } else {
roland@4409 317 should_delay = true;
roland@4409 318 }
kvn@476 319 }
duke@435 320
kvn@476 321 if ((!UseInterpreter || CompileTheWorld) &&
kvn@476 322 is_init_with_ea(callee_method, caller_method, C)) {
kvn@476 323
kvn@476 324 // Escape Analysis stress testing when running Xcomp or CTW:
kvn@476 325 // inline constructors even if they are not reached.
kvn@476 326
kvn@476 327 } else if (profile.count() == 0) {
kvn@476 328 // don't inline unreached call sites
kvn@476 329 return "call site not reached";
kvn@476 330 }
duke@435 331 }
duke@435 332
jrose@1592 333 if (!C->do_inlining() && InlineAccessors) {
kvn@476 334 return "not an accessor";
kvn@476 335 }
never@2981 336 if (inline_level() > _max_inline_level) {
roland@4409 337 if (!callee_method->force_inline() || !IncrementalInline) {
roland@4409 338 return "inlining too deep";
roland@4409 339 } else if (!C->inlining_incrementally()) {
roland@4409 340 should_delay = true;
roland@4409 341 }
kvn@476 342 }
twisti@2687 343
twisti@2866 344 // detect direct and indirect recursive inlining
twisti@3969 345 if (!callee_method->is_compiled_lambda_form()) {
twisti@2866 346 // count the current method and the callee
twisti@2866 347 int inline_level = (method() == callee_method) ? 1 : 0;
twisti@2866 348 if (inline_level > MaxRecursiveInlineLevel)
twisti@2866 349 return "recursively inlining too deep";
twisti@2866 350 // count callers of current method and callee
twisti@2687 351 JVMState* jvms = caller_jvms();
twisti@2687 352 while (jvms != NULL && jvms->has_method()) {
twisti@2687 353 if (jvms->method() == callee_method) {
twisti@2687 354 inline_level++;
twisti@2687 355 if (inline_level > MaxRecursiveInlineLevel)
twisti@2687 356 return "recursively inlining too deep";
twisti@2687 357 }
twisti@2687 358 jvms = jvms->caller();
twisti@2687 359 }
twisti@2687 360 }
twisti@2687 361
twisti@3097 362 int size = callee_method->code_size_for_inlining();
duke@435 363
duke@435 364 if (UseOldInlining && ClipInlining
duke@435 365 && (int)count_inline_bcs() + size >= DesiredMethodLimit) {
roland@4409 366 if (!callee_method->force_inline() || !IncrementalInline) {
roland@4409 367 return "size > DesiredMethodLimit";
roland@4409 368 } else if (!C->inlining_incrementally()) {
roland@4409 369 should_delay = true;
roland@4409 370 }
duke@435 371 }
duke@435 372
duke@435 373 // ok, inline this method
duke@435 374 return NULL;
duke@435 375 }
duke@435 376
duke@435 377 //------------------------------pass_initial_checks----------------------------
duke@435 378 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) {
duke@435 379 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL;
duke@435 380 // Check if a callee_method was suggested
duke@435 381 if( callee_method == NULL ) return false;
duke@435 382 // Check if klass of callee_method is loaded
duke@435 383 if( !callee_holder->is_loaded() ) return false;
duke@435 384 if( !callee_holder->is_initialized() ) return false;
duke@435 385 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) {
duke@435 386 // Checks that constant pool's call site has been visited
duke@435 387 // stricter than callee_holder->is_initialized()
duke@435 388 ciBytecodeStream iter(caller_method);
duke@435 389 iter.force_bci(caller_bci);
duke@435 390 Bytecodes::Code call_bc = iter.cur_bc();
twisti@1572 391 // An invokedynamic instruction does not have a klass.
twisti@1572 392 if (call_bc != Bytecodes::_invokedynamic) {
jrose@1920 393 int index = iter.get_index_u2_cpcache();
twisti@1572 394 if (!caller_method->is_klass_loaded(index, true)) {
twisti@1572 395 return false;
twisti@1572 396 }
twisti@1572 397 // Try to do constant pool resolution if running Xcomp
twisti@1572 398 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) {
twisti@1572 399 return false;
twisti@1572 400 }
duke@435 401 }
duke@435 402 }
duke@435 403 // We will attempt to see if a class/field/etc got properly loaded. If it
duke@435 404 // did not, it may attempt to throw an exception during our probing. Catch
duke@435 405 // and ignore such exceptions and do not attempt to compile the method.
duke@435 406 if( callee_method->should_exclude() ) return false;
duke@435 407
duke@435 408 return true;
duke@435 409 }
duke@435 410
twisti@3100 411 //------------------------------check_can_parse--------------------------------
twisti@3100 412 const char* InlineTree::check_can_parse(ciMethod* callee) {
twisti@3100 413 // Certain methods cannot be parsed at all:
twisti@3100 414 if ( callee->is_native()) return "native method";
twisti@3969 415 if ( callee->is_abstract()) return "abstract method";
twisti@3100 416 if (!callee->can_be_compiled()) return "not compilable (disabled)";
twisti@3100 417 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)";
twisti@3100 418 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)";
twisti@3100 419 return NULL;
twisti@3100 420 }
twisti@3100 421
duke@435 422 //------------------------------print_inlining---------------------------------
duke@435 423 // Really, the failure_msg can be a success message also.
twisti@2687 424 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, const char* failure_msg) const {
roland@4357 425 C->print_inlining(callee_method, inline_level(), caller_bci, failure_msg ? failure_msg : "inline");
twisti@2687 426 if (callee_method == NULL) tty->print(" callee not monotonic or profiled");
twisti@2687 427 if (Verbose && callee_method) {
duke@435 428 const InlineTree *top = this;
duke@435 429 while( top->caller_tree() != NULL ) { top = top->caller_tree(); }
twisti@3969 430 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count());
duke@435 431 }
duke@435 432 }
duke@435 433
duke@435 434 //------------------------------ok_to_inline-----------------------------------
roland@4409 435 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) {
duke@435 436 assert(callee_method != NULL, "caller checks for optimized virtual!");
roland@4409 437 assert(!should_delay, "should be initialized to false");
duke@435 438 #ifdef ASSERT
duke@435 439 // Make sure the incoming jvms has the same information content as me.
duke@435 440 // This means that we can eventually make this whole class AllStatic.
duke@435 441 if (jvms->caller() == NULL) {
duke@435 442 assert(_caller_jvms == NULL, "redundant instance state");
duke@435 443 } else {
duke@435 444 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state");
duke@435 445 }
duke@435 446 assert(_method == jvms->method(), "redundant instance state");
duke@435 447 #endif
duke@435 448 const char *failure_msg = NULL;
duke@435 449 int caller_bci = jvms->bci();
duke@435 450 ciMethod *caller_method = jvms->method();
duke@435 451
twisti@3100 452 // Do some initial checks.
twisti@3100 453 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) {
twisti@3969 454 if (PrintInlining) print_inlining(callee_method, caller_bci, "failed initial checks");
duke@435 455 return NULL;
duke@435 456 }
duke@435 457
twisti@3100 458 // Do some parse checks.
twisti@3100 459 failure_msg = check_can_parse(callee_method);
twisti@3100 460 if (failure_msg != NULL) {
twisti@3100 461 if (PrintInlining) print_inlining(callee_method, caller_bci, failure_msg);
twisti@3100 462 return NULL;
twisti@3100 463 }
twisti@3100 464
duke@435 465 // Check if inlining policy says no.
duke@435 466 WarmCallInfo wci = *(initial_wci);
roland@4409 467 failure_msg = try_to_inline(callee_method, caller_method, caller_bci, profile, &wci, should_delay);
duke@435 468 if (failure_msg != NULL && C->log() != NULL) {
vlivanov@4154 469 C->log()->inline_fail(failure_msg);
duke@435 470 }
duke@435 471
duke@435 472 #ifndef PRODUCT
duke@435 473 if (UseOldInlining && InlineWarmCalls
duke@435 474 && (PrintOpto || PrintOptoInlining || PrintInlining)) {
duke@435 475 bool cold = wci.is_cold();
duke@435 476 bool hot = !cold && wci.is_hot();
duke@435 477 bool old_cold = (failure_msg != NULL);
duke@435 478 if (old_cold != cold || (Verbose || WizardMode)) {
duke@435 479 tty->print(" OldInlining= %4s : %s\n WCI=",
duke@435 480 old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK");
duke@435 481 wci.print();
duke@435 482 }
duke@435 483 }
duke@435 484 #endif
duke@435 485 if (UseOldInlining) {
duke@435 486 if (failure_msg == NULL)
duke@435 487 wci = *(WarmCallInfo::always_hot());
duke@435 488 else
duke@435 489 wci = *(WarmCallInfo::always_cold());
duke@435 490 }
duke@435 491 if (!InlineWarmCalls) {
duke@435 492 if (!wci.is_cold() && !wci.is_hot()) {
duke@435 493 // Do not inline the warm calls.
duke@435 494 wci = *(WarmCallInfo::always_cold());
duke@435 495 }
duke@435 496 }
duke@435 497
duke@435 498 if (!wci.is_cold()) {
duke@435 499 // In -UseOldInlining, the failure_msg may also be a success message.
duke@435 500 if (failure_msg == NULL) failure_msg = "inline (hot)";
duke@435 501
duke@435 502 // Inline!
twisti@3100 503 if (PrintInlining) print_inlining(callee_method, caller_bci, failure_msg);
duke@435 504 if (UseOldInlining)
duke@435 505 build_inline_tree_for_callee(callee_method, jvms, caller_bci);
duke@435 506 if (InlineWarmCalls && !wci.is_hot())
duke@435 507 return new (C) WarmCallInfo(wci); // copy to heap
duke@435 508 return WarmCallInfo::always_hot();
duke@435 509 }
duke@435 510
duke@435 511 // Do not inline
duke@435 512 if (failure_msg == NULL) failure_msg = "too cold to inline";
twisti@3100 513 if (PrintInlining) print_inlining(callee_method, caller_bci, failure_msg);
duke@435 514 return NULL;
duke@435 515 }
duke@435 516
duke@435 517 //------------------------------compute_callee_frequency-----------------------
duke@435 518 float InlineTree::compute_callee_frequency( int caller_bci ) const {
duke@435 519 int count = method()->interpreter_call_site_count(caller_bci);
duke@435 520 int invcnt = method()->interpreter_invocation_count();
duke@435 521 float freq = (float)count/(float)invcnt;
duke@435 522 // Call-site count / interpreter invocation count, scaled recursively.
duke@435 523 // Always between 0.0 and 1.0. Represents the percentage of the method's
duke@435 524 // total execution time used at this call site.
duke@435 525
duke@435 526 return freq;
duke@435 527 }
duke@435 528
duke@435 529 //------------------------------build_inline_tree_for_callee-------------------
duke@435 530 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) {
duke@435 531 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci);
duke@435 532 // Attempt inlining.
duke@435 533 InlineTree* old_ilt = callee_at(caller_bci, callee_method);
duke@435 534 if (old_ilt != NULL) {
duke@435 535 return old_ilt;
duke@435 536 }
never@2981 537 int max_inline_level_adjust = 0;
jrose@1592 538 if (caller_jvms->method() != NULL) {
twisti@3969 539 if (caller_jvms->method()->is_compiled_lambda_form())
never@2981 540 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames
twisti@3969 541 else if (callee_method->is_method_handle_intrinsic() ||
twisti@3969 542 callee_method->is_compiled_lambda_form()) {
never@2981 543 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem
jrose@1592 544 }
never@2981 545 if (max_inline_level_adjust != 0 && PrintInlining && (Verbose || WizardMode)) {
never@2981 546 CompileTask::print_inline_indent(inline_level());
twisti@2898 547 tty->print_cr(" \\-> discounting inline depth");
jrose@1592 548 }
never@2981 549 if (max_inline_level_adjust != 0 && C->log()) {
jrose@1592 550 int id1 = C->log()->identify(caller_jvms->method());
jrose@1592 551 int id2 = C->log()->identify(callee_method);
never@2981 552 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2);
jrose@1592 553 }
jrose@1592 554 }
never@2981 555 InlineTree* ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _max_inline_level + max_inline_level_adjust);
never@2981 556 _subtrees.append(ilt);
duke@435 557
duke@435 558 NOT_PRODUCT( _count_inlines += 1; )
duke@435 559
duke@435 560 return ilt;
duke@435 561 }
duke@435 562
duke@435 563
duke@435 564 //---------------------------------------callee_at-----------------------------
duke@435 565 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const {
duke@435 566 for (int i = 0; i < _subtrees.length(); i++) {
duke@435 567 InlineTree* sub = _subtrees.at(i);
duke@435 568 if (sub->caller_bci() == bci && callee == sub->method()) {
duke@435 569 return sub;
duke@435 570 }
duke@435 571 }
duke@435 572 return NULL;
duke@435 573 }
duke@435 574
duke@435 575
duke@435 576 //------------------------------build_inline_tree_root-------------------------
duke@435 577 InlineTree *InlineTree::build_inline_tree_root() {
duke@435 578 Compile* C = Compile::current();
duke@435 579
duke@435 580 // Root of inline tree
never@2981 581 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel);
duke@435 582
duke@435 583 return ilt;
duke@435 584 }
duke@435 585
duke@435 586
duke@435 587 //-------------------------find_subtree_from_root-----------------------------
duke@435 588 // Given a jvms, which determines a call chain from the root method,
duke@435 589 // find the corresponding inline tree.
duke@435 590 // Note: This method will be removed or replaced as InlineTree goes away.
twisti@3969 591 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) {
duke@435 592 InlineTree* iltp = root;
duke@435 593 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0;
duke@435 594 for (uint d = 1; d <= depth; d++) {
duke@435 595 JVMState* jvmsp = jvms->of_depth(d);
duke@435 596 // Select the corresponding subtree for this bci.
duke@435 597 assert(jvmsp->method() == iltp->method(), "tree still in sync");
duke@435 598 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method();
duke@435 599 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee);
twisti@3969 600 if (sub == NULL) {
twisti@3969 601 if (d == depth) {
twisti@3969 602 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci());
duke@435 603 }
twisti@3969 604 guarantee(sub != NULL, "should be a sub-ilt here");
twisti@3969 605 return sub;
duke@435 606 }
duke@435 607 iltp = sub;
duke@435 608 }
duke@435 609 return iltp;
duke@435 610 }
never@3138 611
never@3138 612
never@3138 613
never@3138 614 #ifndef PRODUCT
never@3138 615 void InlineTree::print_impl(outputStream* st, int indent) const {
never@3138 616 for (int i = 0; i < indent; i++) st->print(" ");
never@3138 617 st->print(" @ %d ", caller_bci());
never@3138 618 method()->print_short_name(st);
never@3138 619 st->cr();
never@3138 620
never@3138 621 for (int i = 0 ; i < _subtrees.length(); i++) {
never@3138 622 _subtrees.at(i)->print_impl(st, indent + 2);
never@3138 623 }
never@3138 624 }
never@3138 625
never@3138 626 void InlineTree::print_value_on(outputStream* st) const {
never@3138 627 print_impl(st, 2);
never@3138 628 }
never@3138 629 #endif

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