1 /* 2 * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "ci/bcEscapeAnalyzer.hpp" 27 #include "ci/ciCallSite.hpp" 28 #include "ci/ciObjArray.hpp" 29 #include "ci/ciMemberName.hpp" 30 #include "ci/ciMethodHandle.hpp" 31 #include "classfile/javaClasses.hpp" 32 #include "compiler/compileLog.hpp" 33 #include "opto/addnode.hpp" 34 #include "opto/callGenerator.hpp" 35 #include "opto/callnode.hpp" 36 #include "opto/castnode.hpp" 37 #include "opto/cfgnode.hpp" 38 #include "opto/parse.hpp" 39 #include "opto/rootnode.hpp" 40 #include "opto/runtime.hpp" 41 #include "opto/subnode.hpp" 42 #include "opto/valuetypenode.hpp" 43 #include "runtime/sharedRuntime.hpp" 44 45 // Utility function. 46 const TypeFunc* CallGenerator::tf() const { 47 return TypeFunc::make(method()); 48 } 49 50 bool CallGenerator::is_inlined_method_handle_intrinsic(JVMState* jvms, ciMethod* callee) { 51 ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci()); 52 return symbolic_info->is_method_handle_intrinsic() && !callee->is_method_handle_intrinsic(); 53 } 54 55 //-----------------------------ParseGenerator--------------------------------- 56 // Internal class which handles all direct bytecode traversal. 57 class ParseGenerator : public InlineCallGenerator { 58 private: 59 bool _is_osr; 60 float _expected_uses; 61 62 public: 63 ParseGenerator(ciMethod* method, float expected_uses, bool is_osr = false) 64 : InlineCallGenerator(method) 65 { 66 _is_osr = is_osr; 67 _expected_uses = expected_uses; 68 assert(InlineTree::check_can_parse(method) == NULL, "parse must be possible"); 69 } 70 71 virtual bool is_parse() const { return true; } 72 virtual JVMState* generate(JVMState* jvms); 73 int is_osr() { return _is_osr; } 74 75 }; 76 77 JVMState* ParseGenerator::generate(JVMState* jvms) { 78 Compile* C = Compile::current(); 79 C->print_inlining_update(this); 80 81 if (is_osr()) { 82 // The JVMS for a OSR has a single argument (see its TypeFunc). 83 assert(jvms->depth() == 1, "no inline OSR"); 84 } 85 86 if (C->failing()) { 87 return NULL; // bailing out of the compile; do not try to parse 88 } 89 90 Parse parser(jvms, method(), _expected_uses); 91 // Grab signature for matching/allocation 92 #ifdef ASSERT 93 if (parser.tf() != (parser.depth() == 1 ? C->tf() : tf())) { 94 MutexLockerEx ml(Compile_lock, Mutex::_no_safepoint_check_flag); 95 assert(C->env()->system_dictionary_modification_counter_changed(), 96 "Must invalidate if TypeFuncs differ"); 97 } 98 #endif 99 100 GraphKit& exits = parser.exits(); 101 102 if (C->failing()) { 103 while (exits.pop_exception_state() != NULL) ; 104 return NULL; 105 } 106 107 assert(exits.jvms()->same_calls_as(jvms), "sanity"); 108 109 // Simply return the exit state of the parser, 110 // augmented by any exceptional states. 111 return exits.transfer_exceptions_into_jvms(); 112 } 113 114 //---------------------------DirectCallGenerator------------------------------ 115 // Internal class which handles all out-of-line calls w/o receiver type checks. 116 class DirectCallGenerator : public CallGenerator { 117 private: 118 CallStaticJavaNode* _call_node; 119 // Force separate memory and I/O projections for the exceptional 120 // paths to facilitate late inlining. 121 bool _separate_io_proj; 122 123 public: 124 DirectCallGenerator(ciMethod* method, bool separate_io_proj) 125 : CallGenerator(method), 126 _separate_io_proj(separate_io_proj) 127 { 128 if (method->is_method_handle_intrinsic() && 129 method->signature()->return_type() == ciEnv::current()->___Value_klass()) { 130 // If that call has not been optimized by the time optimizations 131 // are over, we'll need to add a call to create a value type 132 // instance from the klass returned by the call. Separating 133 // memory and I/O projections for exceptions is required to 134 // perform that graph transformation. 135 _separate_io_proj = true; 136 } 137 } 138 virtual JVMState* generate(JVMState* jvms); 139 140 CallStaticJavaNode* call_node() const { return _call_node; } 141 }; 142 143 JVMState* DirectCallGenerator::generate(JVMState* jvms) { 144 GraphKit kit(jvms); 145 kit.C->print_inlining_update(this); 146 PhaseGVN& gvn = kit.gvn(); 147 bool is_static = method()->is_static(); 148 address target = is_static ? SharedRuntime::get_resolve_static_call_stub() 149 : SharedRuntime::get_resolve_opt_virtual_call_stub(); 150 151 if (kit.C->log() != NULL) { 152 kit.C->log()->elem("direct_call bci='%d'", jvms->bci()); 153 } 154 155 CallStaticJavaNode *call = new CallStaticJavaNode(kit.C, tf(), target, method(), kit.bci()); 156 if (is_inlined_method_handle_intrinsic(jvms, method())) { 157 // To be able to issue a direct call and skip a call to MH.linkTo*/invokeBasic adapter, 158 // additional information about the method being invoked should be attached 159 // to the call site to make resolution logic work 160 // (see SharedRuntime::resolve_static_call_C). 161 call->set_override_symbolic_info(true); 162 } 163 _call_node = call; // Save the call node in case we need it later 164 if (!is_static) { 165 if (!kit.argument(0)->is_ValueType()) { 166 // Make an explicit receiver null_check as part of this call. 167 // Since we share a map with the caller, his JVMS gets adjusted. 168 kit.null_check_receiver_before_call(method()); 169 } 170 if (kit.stopped()) { 171 // And dump it back to the caller, decorated with any exceptions: 172 return kit.transfer_exceptions_into_jvms(); 173 } 174 // Mark the call node as virtual, sort of: 175 call->set_optimized_virtual(true); 176 if (method()->is_method_handle_intrinsic() || 177 method()->is_compiled_lambda_form()) { 178 call->set_method_handle_invoke(true); 179 } 180 } 181 kit.set_arguments_for_java_call(call); 182 kit.set_edges_for_java_call(call, false, _separate_io_proj); 183 Node* ret = kit.set_results_for_java_call(call, _separate_io_proj); 184 // Check if return value is a value type pointer 185 const TypeValueTypePtr* vtptr = gvn.type(ret)->isa_valuetypeptr(); 186 if (vtptr != NULL) { 187 if (vtptr->klass() != kit.C->env()->___Value_klass()) { 188 // Create ValueTypeNode from the oop and replace the return value 189 Node* vt = ValueTypeNode::make(gvn, kit.merged_memory(), ret); 190 kit.push_node(T_VALUETYPE, vt); 191 } else { 192 kit.push_node(T_VALUETYPE, ret); 193 } 194 } else { 195 kit.push_node(method()->return_type()->basic_type(), ret); 196 } 197 return kit.transfer_exceptions_into_jvms(); 198 } 199 200 //--------------------------VirtualCallGenerator------------------------------ 201 // Internal class which handles all out-of-line calls checking receiver type. 202 class VirtualCallGenerator : public CallGenerator { 203 private: 204 int _vtable_index; 205 public: 206 VirtualCallGenerator(ciMethod* method, int vtable_index) 207 : CallGenerator(method), _vtable_index(vtable_index) 208 { 209 assert(vtable_index == Method::invalid_vtable_index || 210 vtable_index >= 0, "either invalid or usable"); 211 } 212 virtual bool is_virtual() const { return true; } 213 virtual JVMState* generate(JVMState* jvms); 214 }; 215 216 JVMState* VirtualCallGenerator::generate(JVMState* jvms) { 217 GraphKit kit(jvms); 218 Node* receiver = kit.argument(0); 219 PhaseGVN& gvn = kit.gvn(); 220 kit.C->print_inlining_update(this); 221 222 if (kit.C->log() != NULL) { 223 kit.C->log()->elem("virtual_call bci='%d'", jvms->bci()); 224 } 225 226 // If the receiver is a constant null, do not torture the system 227 // by attempting to call through it. The compile will proceed 228 // correctly, but may bail out in final_graph_reshaping, because 229 // the call instruction will have a seemingly deficient out-count. 230 // (The bailout says something misleading about an "infinite loop".) 231 if (kit.gvn().type(receiver)->higher_equal(TypePtr::NULL_PTR)) { 232 assert(Bytecodes::is_invoke(kit.java_bc()), "%d: %s", kit.java_bc(), Bytecodes::name(kit.java_bc())); 233 ciMethod* declared_method = kit.method()->get_method_at_bci(kit.bci()); 234 int arg_size = declared_method->signature()->arg_size_for_bc(kit.java_bc()); 235 kit.inc_sp(arg_size); // restore arguments 236 kit.uncommon_trap(Deoptimization::Reason_null_check, 237 Deoptimization::Action_none, 238 NULL, "null receiver"); 239 return kit.transfer_exceptions_into_jvms(); 240 } 241 242 // Ideally we would unconditionally do a null check here and let it 243 // be converted to an implicit check based on profile information. 244 // However currently the conversion to implicit null checks in 245 // Block::implicit_null_check() only looks for loads and stores, not calls. 246 ciMethod *caller = kit.method(); 247 ciMethodData *caller_md = (caller == NULL) ? NULL : caller->method_data(); 248 if (!UseInlineCaches || !ImplicitNullChecks || !os::zero_page_read_protected() || 249 ((ImplicitNullCheckThreshold > 0) && caller_md && 250 (caller_md->trap_count(Deoptimization::Reason_null_check) 251 >= (uint)ImplicitNullCheckThreshold))) { 252 // Make an explicit receiver null_check as part of this call. 253 // Since we share a map with the caller, his JVMS gets adjusted. 254 receiver = kit.null_check_receiver_before_call(method()); 255 if (kit.stopped()) { 256 // And dump it back to the caller, decorated with any exceptions: 257 return kit.transfer_exceptions_into_jvms(); 258 } 259 } 260 261 assert(!method()->is_static(), "virtual call must not be to static"); 262 assert(!method()->is_final(), "virtual call should not be to final"); 263 assert(!method()->is_private(), "virtual call should not be to private"); 264 assert(_vtable_index == Method::invalid_vtable_index || !UseInlineCaches, 265 "no vtable calls if +UseInlineCaches "); 266 address target = SharedRuntime::get_resolve_virtual_call_stub(); 267 // Normal inline cache used for call 268 CallDynamicJavaNode *call = new CallDynamicJavaNode(tf(), target, method(), _vtable_index, kit.bci()); 269 if (is_inlined_method_handle_intrinsic(jvms, method())) { 270 // To be able to issue a direct call (optimized virtual or virtual) 271 // and skip a call to MH.linkTo*/invokeBasic adapter, additional information 272 // about the method being invoked should be attached to the call site to 273 // make resolution logic work (see SharedRuntime::resolve_{virtual,opt_virtual}_call_C). 274 call->set_override_symbolic_info(true); 275 } 276 kit.set_arguments_for_java_call(call); 277 kit.set_edges_for_java_call(call); 278 Node* ret = kit.set_results_for_java_call(call); 279 // Check if return value is a value type pointer 280 if (gvn.type(ret)->isa_valuetypeptr()) { 281 // Create ValueTypeNode from the oop and replace the return value 282 Node* vt = ValueTypeNode::make(gvn, kit.merged_memory(), ret); 283 kit.push_node(T_VALUETYPE, vt); 284 } else { 285 kit.push_node(method()->return_type()->basic_type(), ret); 286 } 287 288 // Represent the effect of an implicit receiver null_check 289 // as part of this call. Since we share a map with the caller, 290 // his JVMS gets adjusted. 291 kit.cast_not_null(receiver); 292 return kit.transfer_exceptions_into_jvms(); 293 } 294 295 CallGenerator* CallGenerator::for_inline(ciMethod* m, float expected_uses) { 296 if (InlineTree::check_can_parse(m) != NULL) return NULL; 297 return new ParseGenerator(m, expected_uses); 298 } 299 300 // As a special case, the JVMS passed to this CallGenerator is 301 // for the method execution already in progress, not just the JVMS 302 // of the caller. Thus, this CallGenerator cannot be mixed with others! 303 CallGenerator* CallGenerator::for_osr(ciMethod* m, int osr_bci) { 304 if (InlineTree::check_can_parse(m) != NULL) return NULL; 305 float past_uses = m->interpreter_invocation_count(); 306 float expected_uses = past_uses; 307 return new ParseGenerator(m, expected_uses, true); 308 } 309 310 CallGenerator* CallGenerator::for_direct_call(ciMethod* m, bool separate_io_proj) { 311 assert(!m->is_abstract(), "for_direct_call mismatch"); 312 return new DirectCallGenerator(m, separate_io_proj); 313 } 314 315 CallGenerator* CallGenerator::for_virtual_call(ciMethod* m, int vtable_index) { 316 assert(!m->is_static(), "for_virtual_call mismatch"); 317 assert(!m->is_method_handle_intrinsic(), "should be a direct call"); 318 return new VirtualCallGenerator(m, vtable_index); 319 } 320 321 // Allow inlining decisions to be delayed 322 class LateInlineCallGenerator : public DirectCallGenerator { 323 private: 324 // unique id for log compilation 325 jlong _unique_id; 326 327 protected: 328 CallGenerator* _inline_cg; 329 virtual bool do_late_inline_check(JVMState* jvms) { return true; } 330 331 public: 332 LateInlineCallGenerator(ciMethod* method, CallGenerator* inline_cg) : 333 DirectCallGenerator(method, true), _inline_cg(inline_cg), _unique_id(0) {} 334 335 virtual bool is_late_inline() const { return true; } 336 337 // Convert the CallStaticJava into an inline 338 virtual void do_late_inline(); 339 340 virtual JVMState* generate(JVMState* jvms) { 341 Compile *C = Compile::current(); 342 343 C->log_inline_id(this); 344 345 // Record that this call site should be revisited once the main 346 // parse is finished. 347 if (!is_mh_late_inline()) { 348 C->add_late_inline(this); 349 } 350 351 // Emit the CallStaticJava and request separate projections so 352 // that the late inlining logic can distinguish between fall 353 // through and exceptional uses of the memory and io projections 354 // as is done for allocations and macro expansion. 355 return DirectCallGenerator::generate(jvms); 356 } 357 358 virtual void print_inlining_late(const char* msg) { 359 CallNode* call = call_node(); 360 Compile* C = Compile::current(); 361 C->print_inlining_assert_ready(); 362 C->print_inlining(method(), call->jvms()->depth()-1, call->jvms()->bci(), msg); 363 C->print_inlining_move_to(this); 364 C->print_inlining_update_delayed(this); 365 } 366 367 virtual void set_unique_id(jlong id) { 368 _unique_id = id; 369 } 370 371 virtual jlong unique_id() const { 372 return _unique_id; 373 } 374 }; 375 376 void LateInlineCallGenerator::do_late_inline() { 377 // Can't inline it 378 CallStaticJavaNode* call = call_node(); 379 if (call == NULL || call->outcnt() == 0 || 380 call->in(0) == NULL || call->in(0)->is_top()) { 381 return; 382 } 383 384 const TypeTuple *r = call->tf()->domain_cc(); 385 for (int i1 = 0; i1 < method()->arg_size(); i1++) { 386 if (call->in(TypeFunc::Parms + i1)->is_top() && r->field_at(TypeFunc::Parms + i1) != Type::HALF) { 387 assert(Compile::current()->inlining_incrementally(), "shouldn't happen during parsing"); 388 return; 389 } 390 } 391 392 if (call->in(TypeFunc::Memory)->is_top()) { 393 assert(Compile::current()->inlining_incrementally(), "shouldn't happen during parsing"); 394 return; 395 } 396 397 Compile* C = Compile::current(); 398 // Remove inlined methods from Compiler's lists. 399 if (call->is_macro()) { 400 C->remove_macro_node(call); 401 } 402 403 // Make a clone of the JVMState that appropriate to use for driving a parse 404 JVMState* old_jvms = call->jvms(); 405 JVMState* jvms = old_jvms->clone_shallow(C); 406 uint size = call->req(); 407 SafePointNode* map = new SafePointNode(size, jvms); 408 for (uint i1 = 0; i1 < size; i1++) { 409 map->init_req(i1, call->in(i1)); 410 } 411 412 PhaseGVN& gvn = *C->initial_gvn(); 413 // Make sure the state is a MergeMem for parsing. 414 if (!map->in(TypeFunc::Memory)->is_MergeMem()) { 415 Node* mem = MergeMemNode::make(map->in(TypeFunc::Memory)); 416 gvn.set_type_bottom(mem); 417 map->set_req(TypeFunc::Memory, mem); 418 } 419 420 // blow away old call arguments 421 Node* top = C->top(); 422 for (uint i1 = TypeFunc::Parms; i1 < call->_tf->domain_cc()->cnt(); i1++) { 423 map->set_req(i1, top); 424 } 425 jvms->set_map(map); 426 427 // Make enough space in the expression stack to transfer 428 // the incoming arguments and return value. 429 map->ensure_stack(jvms, jvms->method()->max_stack()); 430 const TypeTuple *domain_sig = call->_tf->domain_sig(); 431 uint nargs = method()->arg_size(); 432 assert(domain_sig->cnt() - TypeFunc::Parms == nargs, "inconsistent signature"); 433 434 uint j = TypeFunc::Parms; 435 for (uint i1 = 0; i1 < nargs; i1++) { 436 const Type* t = domain_sig->field_at(TypeFunc::Parms + i1); 437 if (!ValueTypePassFieldsAsArgs) { 438 Node* arg = call->in(TypeFunc::Parms + i1); 439 if (t->isa_valuetypeptr()) { 440 arg = ValueTypeNode::make(gvn, map->memory(), arg); 441 } 442 map->set_argument(jvms, i1, arg); 443 } else { 444 if (t->isa_valuetypeptr() && t->is_valuetypeptr()->klass() != C->env()->___Value_klass()) { 445 ciValueKlass* vk = t->is_valuetypeptr()->value_type()->value_klass(); 446 Node* vt = C->create_vt_node(call, vk, vk, 0, j, true); 447 map->set_argument(jvms, i1, gvn.transform(vt)); 448 j += vk->value_arg_slots(); 449 } else { 450 map->set_argument(jvms, i1, call->in(j)); 451 j++; 452 } 453 } 454 } 455 456 C->print_inlining_assert_ready(); 457 458 C->print_inlining_move_to(this); 459 460 C->log_late_inline(this); 461 462 // This check is done here because for_method_handle_inline() method 463 // needs jvms for inlined state. 464 if (!do_late_inline_check(jvms)) { 465 map->disconnect_inputs(NULL, C); 466 return; 467 } 468 469 // Setup default node notes to be picked up by the inlining 470 Node_Notes* old_nn = C->node_notes_at(call->_idx); 471 if (old_nn != NULL) { 472 Node_Notes* entry_nn = old_nn->clone(C); 473 entry_nn->set_jvms(jvms); 474 C->set_default_node_notes(entry_nn); 475 } 476 477 // Now perform the inlining using the synthesized JVMState 478 JVMState* new_jvms = _inline_cg->generate(jvms); 479 if (new_jvms == NULL) return; // no change 480 if (C->failing()) return; 481 482 // Capture any exceptional control flow 483 GraphKit kit(new_jvms); 484 485 // Find the result object 486 Node* result = C->top(); 487 ciType* return_type = _inline_cg->method()->return_type(); 488 int result_size = return_type->size(); 489 if (result_size != 0 && !kit.stopped()) { 490 result = (result_size == 1) ? kit.pop() : kit.pop_pair(); 491 } 492 493 C->set_has_loops(C->has_loops() || _inline_cg->method()->has_loops()); 494 C->env()->notice_inlined_method(_inline_cg->method()); 495 C->set_inlining_progress(true); 496 497 if (return_type->is_valuetype() && return_type != C->env()->___Value_klass()) { 498 if (result->is_ValueType()) { 499 if (!call->tf()->returns_value_type_as_fields()) { 500 result = result->as_ValueType()->store_to_memory(&kit); 501 } else { 502 // Return of multiple values (the fields of a value type) 503 ValueTypeNode* vt = result->as_ValueType(); 504 vt->replace_call_results(call, C); 505 } 506 } else { 507 assert(result->is_top(), "what else?"); 508 for (DUIterator_Fast imax, i = call->fast_outs(imax); i < imax; i++) { 509 ProjNode *pn = call->fast_out(i)->as_Proj(); 510 uint con = pn->_con; 511 if (con >= TypeFunc::Parms) { 512 // C->gvn_replace_by(pn, C->top()); 513 C->initial_gvn()->hash_delete(pn); 514 pn->set_req(0, C->top()); 515 --i; --imax; 516 } 517 } 518 } 519 } 520 521 kit.replace_call(call, result, true); 522 } 523 524 525 CallGenerator* CallGenerator::for_late_inline(ciMethod* method, CallGenerator* inline_cg) { 526 return new LateInlineCallGenerator(method, inline_cg); 527 } 528 529 class LateInlineMHCallGenerator : public LateInlineCallGenerator { 530 ciMethod* _caller; 531 int _attempt; 532 bool _input_not_const; 533 534 virtual bool do_late_inline_check(JVMState* jvms); 535 virtual bool already_attempted() const { return _attempt > 0; } 536 537 public: 538 LateInlineMHCallGenerator(ciMethod* caller, ciMethod* callee, bool input_not_const) : 539 LateInlineCallGenerator(callee, NULL), _caller(caller), _attempt(0), _input_not_const(input_not_const) {} 540 541 virtual bool is_mh_late_inline() const { return true; } 542 543 virtual JVMState* generate(JVMState* jvms) { 544 JVMState* new_jvms = LateInlineCallGenerator::generate(jvms); 545 546 Compile* C = Compile::current(); 547 if (_input_not_const) { 548 // inlining won't be possible so no need to enqueue right now. 549 call_node()->set_generator(this); 550 } else { 551 C->add_late_inline(this); 552 } 553 return new_jvms; 554 } 555 }; 556 557 bool LateInlineMHCallGenerator::do_late_inline_check(JVMState* jvms) { 558 559 CallGenerator* cg = for_method_handle_inline(jvms, _caller, method(), _input_not_const, AlwaysIncrementalInline); 560 561 Compile::current()->print_inlining_update_delayed(this); 562 563 if (!_input_not_const) { 564 _attempt++; 565 } 566 567 if (cg != NULL && (cg->is_inline() || cg->is_inlined_method_handle_intrinsic(jvms, cg->method()))) { 568 assert(!cg->is_late_inline(), "we're doing late inlining"); 569 _inline_cg = cg; 570 Compile::current()->dec_number_of_mh_late_inlines(); 571 return true; 572 } 573 574 call_node()->set_generator(this); 575 return false; 576 } 577 578 CallGenerator* CallGenerator::for_mh_late_inline(ciMethod* caller, ciMethod* callee, bool input_not_const) { 579 Compile::current()->inc_number_of_mh_late_inlines(); 580 CallGenerator* cg = new LateInlineMHCallGenerator(caller, callee, input_not_const); 581 return cg; 582 } 583 584 class LateInlineStringCallGenerator : public LateInlineCallGenerator { 585 586 public: 587 LateInlineStringCallGenerator(ciMethod* method, CallGenerator* inline_cg) : 588 LateInlineCallGenerator(method, inline_cg) {} 589 590 virtual JVMState* generate(JVMState* jvms) { 591 Compile *C = Compile::current(); 592 593 C->log_inline_id(this); 594 595 C->add_string_late_inline(this); 596 597 JVMState* new_jvms = DirectCallGenerator::generate(jvms); 598 return new_jvms; 599 } 600 601 virtual bool is_string_late_inline() const { return true; } 602 }; 603 604 CallGenerator* CallGenerator::for_string_late_inline(ciMethod* method, CallGenerator* inline_cg) { 605 return new LateInlineStringCallGenerator(method, inline_cg); 606 } 607 608 class LateInlineBoxingCallGenerator : public LateInlineCallGenerator { 609 610 public: 611 LateInlineBoxingCallGenerator(ciMethod* method, CallGenerator* inline_cg) : 612 LateInlineCallGenerator(method, inline_cg) {} 613 614 virtual JVMState* generate(JVMState* jvms) { 615 Compile *C = Compile::current(); 616 617 C->log_inline_id(this); 618 619 C->add_boxing_late_inline(this); 620 621 JVMState* new_jvms = DirectCallGenerator::generate(jvms); 622 return new_jvms; 623 } 624 }; 625 626 CallGenerator* CallGenerator::for_boxing_late_inline(ciMethod* method, CallGenerator* inline_cg) { 627 return new LateInlineBoxingCallGenerator(method, inline_cg); 628 } 629 630 //---------------------------WarmCallGenerator-------------------------------- 631 // Internal class which handles initial deferral of inlining decisions. 632 class WarmCallGenerator : public CallGenerator { 633 WarmCallInfo* _call_info; 634 CallGenerator* _if_cold; 635 CallGenerator* _if_hot; 636 bool _is_virtual; // caches virtuality of if_cold 637 bool _is_inline; // caches inline-ness of if_hot 638 639 public: 640 WarmCallGenerator(WarmCallInfo* ci, 641 CallGenerator* if_cold, 642 CallGenerator* if_hot) 643 : CallGenerator(if_cold->method()) 644 { 645 assert(method() == if_hot->method(), "consistent choices"); 646 _call_info = ci; 647 _if_cold = if_cold; 648 _if_hot = if_hot; 649 _is_virtual = if_cold->is_virtual(); 650 _is_inline = if_hot->is_inline(); 651 } 652 653 virtual bool is_inline() const { return _is_inline; } 654 virtual bool is_virtual() const { return _is_virtual; } 655 virtual bool is_deferred() const { return true; } 656 657 virtual JVMState* generate(JVMState* jvms); 658 }; 659 660 661 CallGenerator* CallGenerator::for_warm_call(WarmCallInfo* ci, 662 CallGenerator* if_cold, 663 CallGenerator* if_hot) { 664 return new WarmCallGenerator(ci, if_cold, if_hot); 665 } 666 667 JVMState* WarmCallGenerator::generate(JVMState* jvms) { 668 Compile* C = Compile::current(); 669 C->print_inlining_update(this); 670 671 if (C->log() != NULL) { 672 C->log()->elem("warm_call bci='%d'", jvms->bci()); 673 } 674 jvms = _if_cold->generate(jvms); 675 if (jvms != NULL) { 676 Node* m = jvms->map()->control(); 677 if (m->is_CatchProj()) m = m->in(0); else m = C->top(); 678 if (m->is_Catch()) m = m->in(0); else m = C->top(); 679 if (m->is_Proj()) m = m->in(0); else m = C->top(); 680 if (m->is_CallJava()) { 681 _call_info->set_call(m->as_Call()); 682 _call_info->set_hot_cg(_if_hot); 683 #ifndef PRODUCT 684 if (PrintOpto || PrintOptoInlining) { 685 tty->print_cr("Queueing for warm inlining at bci %d:", jvms->bci()); 686 tty->print("WCI: "); 687 _call_info->print(); 688 } 689 #endif 690 _call_info->set_heat(_call_info->compute_heat()); 691 C->set_warm_calls(_call_info->insert_into(C->warm_calls())); 692 } 693 } 694 return jvms; 695 } 696 697 void WarmCallInfo::make_hot() { 698 Unimplemented(); 699 } 700 701 void WarmCallInfo::make_cold() { 702 // No action: Just dequeue. 703 } 704 705 706 //------------------------PredictedCallGenerator------------------------------ 707 // Internal class which handles all out-of-line calls checking receiver type. 708 class PredictedCallGenerator : public CallGenerator { 709 ciKlass* _predicted_receiver; 710 CallGenerator* _if_missed; 711 CallGenerator* _if_hit; 712 float _hit_prob; 713 714 public: 715 PredictedCallGenerator(ciKlass* predicted_receiver, 716 CallGenerator* if_missed, 717 CallGenerator* if_hit, float hit_prob) 718 : CallGenerator(if_missed->method()) 719 { 720 // The call profile data may predict the hit_prob as extreme as 0 or 1. 721 // Remove the extremes values from the range. 722 if (hit_prob > PROB_MAX) hit_prob = PROB_MAX; 723 if (hit_prob < PROB_MIN) hit_prob = PROB_MIN; 724 725 _predicted_receiver = predicted_receiver; 726 _if_missed = if_missed; 727 _if_hit = if_hit; 728 _hit_prob = hit_prob; 729 } 730 731 virtual bool is_virtual() const { return true; } 732 virtual bool is_inline() const { return _if_hit->is_inline(); } 733 virtual bool is_deferred() const { return _if_hit->is_deferred(); } 734 735 virtual JVMState* generate(JVMState* jvms); 736 }; 737 738 739 CallGenerator* CallGenerator::for_predicted_call(ciKlass* predicted_receiver, 740 CallGenerator* if_missed, 741 CallGenerator* if_hit, 742 float hit_prob) { 743 return new PredictedCallGenerator(predicted_receiver, if_missed, if_hit, hit_prob); 744 } 745 746 747 JVMState* PredictedCallGenerator::generate(JVMState* jvms) { 748 GraphKit kit(jvms); 749 kit.C->print_inlining_update(this); 750 PhaseGVN& gvn = kit.gvn(); 751 // We need an explicit receiver null_check before checking its type. 752 // We share a map with the caller, so his JVMS gets adjusted. 753 Node* receiver = kit.argument(0); 754 CompileLog* log = kit.C->log(); 755 if (log != NULL) { 756 log->elem("predicted_call bci='%d' klass='%d'", 757 jvms->bci(), log->identify(_predicted_receiver)); 758 } 759 760 receiver = kit.null_check_receiver_before_call(method()); 761 if (kit.stopped()) { 762 return kit.transfer_exceptions_into_jvms(); 763 } 764 765 // Make a copy of the replaced nodes in case we need to restore them 766 ReplacedNodes replaced_nodes = kit.map()->replaced_nodes(); 767 replaced_nodes.clone(); 768 769 Node* exact_receiver = receiver; // will get updated in place... 770 Node* slow_ctl = kit.type_check_receiver(receiver, 771 _predicted_receiver, _hit_prob, 772 &exact_receiver); 773 774 SafePointNode* slow_map = NULL; 775 JVMState* slow_jvms = NULL; 776 { PreserveJVMState pjvms(&kit); 777 kit.set_control(slow_ctl); 778 if (!kit.stopped()) { 779 slow_jvms = _if_missed->generate(kit.sync_jvms()); 780 if (kit.failing()) 781 return NULL; // might happen because of NodeCountInliningCutoff 782 assert(slow_jvms != NULL, "must be"); 783 kit.add_exception_states_from(slow_jvms); 784 kit.set_map(slow_jvms->map()); 785 if (!kit.stopped()) 786 slow_map = kit.stop(); 787 } 788 } 789 790 if (kit.stopped()) { 791 // Instance exactly does not matches the desired type. 792 kit.set_jvms(slow_jvms); 793 return kit.transfer_exceptions_into_jvms(); 794 } 795 796 // fall through if the instance exactly matches the desired type 797 kit.replace_in_map(receiver, exact_receiver); 798 799 // Make the hot call: 800 JVMState* new_jvms = _if_hit->generate(kit.sync_jvms()); 801 if (new_jvms == NULL) { 802 // Inline failed, so make a direct call. 803 assert(_if_hit->is_inline(), "must have been a failed inline"); 804 CallGenerator* cg = CallGenerator::for_direct_call(_if_hit->method()); 805 new_jvms = cg->generate(kit.sync_jvms()); 806 } 807 kit.add_exception_states_from(new_jvms); 808 kit.set_jvms(new_jvms); 809 810 // Need to merge slow and fast? 811 if (slow_map == NULL) { 812 // The fast path is the only path remaining. 813 return kit.transfer_exceptions_into_jvms(); 814 } 815 816 if (kit.stopped()) { 817 // Inlined method threw an exception, so it's just the slow path after all. 818 kit.set_jvms(slow_jvms); 819 return kit.transfer_exceptions_into_jvms(); 820 } 821 822 // There are 2 branches and the replaced nodes are only valid on 823 // one: restore the replaced nodes to what they were before the 824 // branch. 825 kit.map()->set_replaced_nodes(replaced_nodes); 826 827 // Finish the diamond. 828 kit.C->set_has_split_ifs(true); // Has chance for split-if optimization 829 RegionNode* region = new RegionNode(3); 830 region->init_req(1, kit.control()); 831 region->init_req(2, slow_map->control()); 832 kit.set_control(gvn.transform(region)); 833 Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO); 834 iophi->set_req(2, slow_map->i_o()); 835 kit.set_i_o(gvn.transform(iophi)); 836 // Merge memory 837 kit.merge_memory(slow_map->merged_memory(), region, 2); 838 // Transform new memory Phis. 839 for (MergeMemStream mms(kit.merged_memory()); mms.next_non_empty();) { 840 Node* phi = mms.memory(); 841 if (phi->is_Phi() && phi->in(0) == region) { 842 mms.set_memory(gvn.transform(phi)); 843 } 844 } 845 uint tos = kit.jvms()->stkoff() + kit.sp(); 846 uint limit = slow_map->req(); 847 for (uint i = TypeFunc::Parms; i < limit; i++) { 848 // Skip unused stack slots; fast forward to monoff(); 849 if (i == tos) { 850 i = kit.jvms()->monoff(); 851 if( i >= limit ) break; 852 } 853 Node* m = kit.map()->in(i); 854 Node* n = slow_map->in(i); 855 if (m != n) { 856 const Type* t = gvn.type(m)->meet_speculative(gvn.type(n)); 857 Node* phi = PhiNode::make(region, m, t); 858 phi->set_req(2, n); 859 kit.map()->set_req(i, gvn.transform(phi)); 860 } 861 } 862 return kit.transfer_exceptions_into_jvms(); 863 } 864 865 866 CallGenerator* CallGenerator::for_method_handle_call(JVMState* jvms, ciMethod* caller, ciMethod* callee, bool delayed_forbidden) { 867 assert(callee->is_method_handle_intrinsic(), "for_method_handle_call mismatch"); 868 bool input_not_const; 869 CallGenerator* cg = CallGenerator::for_method_handle_inline(jvms, caller, callee, input_not_const, false); 870 Compile* C = Compile::current(); 871 if (cg != NULL) { 872 if (!delayed_forbidden && AlwaysIncrementalInline) { 873 return CallGenerator::for_late_inline(callee, cg); 874 } else { 875 return cg; 876 } 877 } 878 int bci = jvms->bci(); 879 ciCallProfile profile = caller->call_profile_at_bci(bci); 880 int call_site_count = caller->scale_count(profile.count()); 881 882 if (IncrementalInline && (AlwaysIncrementalInline || 883 (call_site_count > 0 && (input_not_const || !C->inlining_incrementally() || C->over_inlining_cutoff())))) { 884 return CallGenerator::for_mh_late_inline(caller, callee, input_not_const); 885 } else { 886 // Out-of-line call. 887 return CallGenerator::for_direct_call(callee); 888 } 889 } 890 891 CallGenerator* CallGenerator::for_method_handle_inline(JVMState* jvms, ciMethod* caller, ciMethod* callee, bool& input_not_const, bool delayed_forbidden) { 892 GraphKit kit(jvms); 893 PhaseGVN& gvn = kit.gvn(); 894 Compile* C = kit.C; 895 vmIntrinsics::ID iid = callee->intrinsic_id(); 896 input_not_const = true; 897 switch (iid) { 898 case vmIntrinsics::_invokeBasic: 899 { 900 // Get MethodHandle receiver: 901 Node* receiver = kit.argument(0); 902 if (receiver->Opcode() == Op_ConP) { 903 input_not_const = false; 904 const TypeOopPtr* oop_ptr = receiver->bottom_type()->is_oopptr(); 905 ciMethod* target = oop_ptr->const_oop()->as_method_handle()->get_vmtarget(); 906 const int vtable_index = Method::invalid_vtable_index; 907 908 if (!ciMethod::is_consistent_info(callee, target)) { 909 print_inlining_failure(C, callee, jvms->depth() - 1, jvms->bci(), 910 "signatures mismatch"); 911 return NULL; 912 } 913 914 CallGenerator* cg = C->call_generator(target, vtable_index, 915 false /* call_does_dispatch */, 916 jvms, 917 true /* allow_inline */, 918 PROB_ALWAYS, 919 NULL, 920 true, 921 delayed_forbidden); 922 return cg; 923 } else { 924 print_inlining_failure(C, callee, jvms->depth() - 1, jvms->bci(), 925 "receiver not constant"); 926 } 927 } 928 break; 929 930 case vmIntrinsics::_linkToVirtual: 931 case vmIntrinsics::_linkToStatic: 932 case vmIntrinsics::_linkToSpecial: 933 case vmIntrinsics::_linkToInterface: 934 { 935 // Get MemberName argument: 936 Node* member_name = kit.argument(callee->arg_size() - 1); 937 if (member_name->Opcode() == Op_ConP) { 938 input_not_const = false; 939 const TypeOopPtr* oop_ptr = member_name->bottom_type()->is_oopptr(); 940 ciMethod* target = oop_ptr->const_oop()->as_member_name()->get_vmtarget(); 941 942 if (!ciMethod::is_consistent_info(callee, target)) { 943 print_inlining_failure(C, callee, jvms->depth() - 1, jvms->bci(), 944 "signatures mismatch"); 945 return NULL; 946 } 947 948 // In lambda forms we erase signature types to avoid resolving issues 949 // involving class loaders. When we optimize a method handle invoke 950 // to a direct call we must cast the receiver and arguments to its 951 // actual types. 952 ciSignature* signature = target->signature(); 953 const int receiver_skip = target->is_static() ? 0 : 1; 954 // Cast receiver to its type. 955 if (!target->is_static()) { 956 Node* arg = kit.argument(0); 957 const TypeOopPtr* arg_type = arg->bottom_type()->isa_oopptr(); 958 const Type* sig_type = TypeOopPtr::make_from_klass(signature->accessing_klass()); 959 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) { 960 Node* cast_obj = gvn.transform(new CheckCastPPNode(kit.control(), arg, sig_type)); 961 kit.set_argument(0, cast_obj); 962 } 963 } 964 // Cast reference arguments to its type. 965 for (int i = 0, j = 0; i < signature->count(); i++) { 966 ciType* t = signature->type_at(i); 967 if (t->is_klass()) { 968 Node* arg = kit.argument(receiver_skip + j); 969 const TypeOopPtr* arg_type = arg->bottom_type()->isa_oopptr(); 970 const Type* sig_type = TypeOopPtr::make_from_klass(t->as_klass()); 971 if (arg_type != NULL && !arg_type->higher_equal(sig_type)) { 972 Node* cast_obj = gvn.transform(new CheckCastPPNode(kit.control(), arg, sig_type)); 973 kit.set_argument(receiver_skip + j, cast_obj); 974 } 975 } 976 j += t->size(); // long and double take two slots 977 } 978 979 // Try to get the most accurate receiver type 980 const bool is_virtual = (iid == vmIntrinsics::_linkToVirtual); 981 const bool is_virtual_or_interface = (is_virtual || iid == vmIntrinsics::_linkToInterface); 982 int vtable_index = Method::invalid_vtable_index; 983 bool call_does_dispatch = false; 984 985 ciKlass* speculative_receiver_type = NULL; 986 if (is_virtual_or_interface) { 987 ciInstanceKlass* klass = target->holder(); 988 Node* receiver_node = kit.argument(0); 989 const TypeOopPtr* receiver_type = gvn.type(receiver_node)->isa_oopptr(); 990 // call_does_dispatch and vtable_index are out-parameters. They might be changed. 991 // optimize_virtual_call() takes 2 different holder 992 // arguments for a corner case that doesn't apply here (see 993 // Parse::do_call()) 994 target = C->optimize_virtual_call(caller, jvms->bci(), klass, klass, 995 target, receiver_type, is_virtual, 996 call_does_dispatch, vtable_index, // out-parameters 997 false /* check_access */); 998 // We lack profiling at this call but type speculation may 999 // provide us with a type 1000 speculative_receiver_type = (receiver_type != NULL) ? receiver_type->speculative_type() : NULL; 1001 } 1002 CallGenerator* cg = C->call_generator(target, vtable_index, call_does_dispatch, jvms, 1003 true /* allow_inline */, 1004 PROB_ALWAYS, 1005 speculative_receiver_type, 1006 true, 1007 delayed_forbidden); 1008 return cg; 1009 } else { 1010 print_inlining_failure(C, callee, jvms->depth() - 1, jvms->bci(), 1011 "member_name not constant"); 1012 } 1013 } 1014 break; 1015 1016 default: 1017 fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)); 1018 break; 1019 } 1020 return NULL; 1021 } 1022 1023 1024 //------------------------PredicatedIntrinsicGenerator------------------------------ 1025 // Internal class which handles all predicated Intrinsic calls. 1026 class PredicatedIntrinsicGenerator : public CallGenerator { 1027 CallGenerator* _intrinsic; 1028 CallGenerator* _cg; 1029 1030 public: 1031 PredicatedIntrinsicGenerator(CallGenerator* intrinsic, 1032 CallGenerator* cg) 1033 : CallGenerator(cg->method()) 1034 { 1035 _intrinsic = intrinsic; 1036 _cg = cg; 1037 } 1038 1039 virtual bool is_virtual() const { return true; } 1040 virtual bool is_inlined() const { return true; } 1041 virtual bool is_intrinsic() const { return true; } 1042 1043 virtual JVMState* generate(JVMState* jvms); 1044 }; 1045 1046 1047 CallGenerator* CallGenerator::for_predicated_intrinsic(CallGenerator* intrinsic, 1048 CallGenerator* cg) { 1049 return new PredicatedIntrinsicGenerator(intrinsic, cg); 1050 } 1051 1052 1053 JVMState* PredicatedIntrinsicGenerator::generate(JVMState* jvms) { 1054 // The code we want to generate here is: 1055 // if (receiver == NULL) 1056 // uncommon_Trap 1057 // if (predicate(0)) 1058 // do_intrinsic(0) 1059 // else 1060 // if (predicate(1)) 1061 // do_intrinsic(1) 1062 // ... 1063 // else 1064 // do_java_comp 1065 1066 GraphKit kit(jvms); 1067 PhaseGVN& gvn = kit.gvn(); 1068 1069 CompileLog* log = kit.C->log(); 1070 if (log != NULL) { 1071 log->elem("predicated_intrinsic bci='%d' method='%d'", 1072 jvms->bci(), log->identify(method())); 1073 } 1074 1075 if (!method()->is_static()) { 1076 // We need an explicit receiver null_check before checking its type in predicate. 1077 // We share a map with the caller, so his JVMS gets adjusted. 1078 Node* receiver = kit.null_check_receiver_before_call(method()); 1079 if (kit.stopped()) { 1080 return kit.transfer_exceptions_into_jvms(); 1081 } 1082 } 1083 1084 int n_predicates = _intrinsic->predicates_count(); 1085 assert(n_predicates > 0, "sanity"); 1086 1087 JVMState** result_jvms = NEW_RESOURCE_ARRAY(JVMState*, (n_predicates+1)); 1088 1089 // Region for normal compilation code if intrinsic failed. 1090 Node* slow_region = new RegionNode(1); 1091 1092 int results = 0; 1093 for (int predicate = 0; (predicate < n_predicates) && !kit.stopped(); predicate++) { 1094 #ifdef ASSERT 1095 JVMState* old_jvms = kit.jvms(); 1096 SafePointNode* old_map = kit.map(); 1097 Node* old_io = old_map->i_o(); 1098 Node* old_mem = old_map->memory(); 1099 Node* old_exc = old_map->next_exception(); 1100 #endif 1101 Node* else_ctrl = _intrinsic->generate_predicate(kit.sync_jvms(), predicate); 1102 #ifdef ASSERT 1103 // Assert(no_new_memory && no_new_io && no_new_exceptions) after generate_predicate. 1104 assert(old_jvms == kit.jvms(), "generate_predicate should not change jvm state"); 1105 SafePointNode* new_map = kit.map(); 1106 assert(old_io == new_map->i_o(), "generate_predicate should not change i_o"); 1107 assert(old_mem == new_map->memory(), "generate_predicate should not change memory"); 1108 assert(old_exc == new_map->next_exception(), "generate_predicate should not add exceptions"); 1109 #endif 1110 if (!kit.stopped()) { 1111 PreserveJVMState pjvms(&kit); 1112 // Generate intrinsic code: 1113 JVMState* new_jvms = _intrinsic->generate(kit.sync_jvms()); 1114 if (new_jvms == NULL) { 1115 // Intrinsic failed, use normal compilation path for this predicate. 1116 slow_region->add_req(kit.control()); 1117 } else { 1118 kit.add_exception_states_from(new_jvms); 1119 kit.set_jvms(new_jvms); 1120 if (!kit.stopped()) { 1121 result_jvms[results++] = kit.jvms(); 1122 } 1123 } 1124 } 1125 if (else_ctrl == NULL) { 1126 else_ctrl = kit.C->top(); 1127 } 1128 kit.set_control(else_ctrl); 1129 } 1130 if (!kit.stopped()) { 1131 // Final 'else' after predicates. 1132 slow_region->add_req(kit.control()); 1133 } 1134 if (slow_region->req() > 1) { 1135 PreserveJVMState pjvms(&kit); 1136 // Generate normal compilation code: 1137 kit.set_control(gvn.transform(slow_region)); 1138 JVMState* new_jvms = _cg->generate(kit.sync_jvms()); 1139 if (kit.failing()) 1140 return NULL; // might happen because of NodeCountInliningCutoff 1141 assert(new_jvms != NULL, "must be"); 1142 kit.add_exception_states_from(new_jvms); 1143 kit.set_jvms(new_jvms); 1144 if (!kit.stopped()) { 1145 result_jvms[results++] = kit.jvms(); 1146 } 1147 } 1148 1149 if (results == 0) { 1150 // All paths ended in uncommon traps. 1151 (void) kit.stop(); 1152 return kit.transfer_exceptions_into_jvms(); 1153 } 1154 1155 if (results == 1) { // Only one path 1156 kit.set_jvms(result_jvms[0]); 1157 return kit.transfer_exceptions_into_jvms(); 1158 } 1159 1160 // Merge all paths. 1161 kit.C->set_has_split_ifs(true); // Has chance for split-if optimization 1162 RegionNode* region = new RegionNode(results + 1); 1163 Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO); 1164 for (int i = 0; i < results; i++) { 1165 JVMState* jvms = result_jvms[i]; 1166 int path = i + 1; 1167 SafePointNode* map = jvms->map(); 1168 region->init_req(path, map->control()); 1169 iophi->set_req(path, map->i_o()); 1170 if (i == 0) { 1171 kit.set_jvms(jvms); 1172 } else { 1173 kit.merge_memory(map->merged_memory(), region, path); 1174 } 1175 } 1176 kit.set_control(gvn.transform(region)); 1177 kit.set_i_o(gvn.transform(iophi)); 1178 // Transform new memory Phis. 1179 for (MergeMemStream mms(kit.merged_memory()); mms.next_non_empty();) { 1180 Node* phi = mms.memory(); 1181 if (phi->is_Phi() && phi->in(0) == region) { 1182 mms.set_memory(gvn.transform(phi)); 1183 } 1184 } 1185 1186 // Merge debug info. 1187 Node** ins = NEW_RESOURCE_ARRAY(Node*, results); 1188 uint tos = kit.jvms()->stkoff() + kit.sp(); 1189 Node* map = kit.map(); 1190 uint limit = map->req(); 1191 for (uint i = TypeFunc::Parms; i < limit; i++) { 1192 // Skip unused stack slots; fast forward to monoff(); 1193 if (i == tos) { 1194 i = kit.jvms()->monoff(); 1195 if( i >= limit ) break; 1196 } 1197 Node* n = map->in(i); 1198 ins[0] = n; 1199 const Type* t = gvn.type(n); 1200 bool needs_phi = false; 1201 for (int j = 1; j < results; j++) { 1202 JVMState* jvms = result_jvms[j]; 1203 Node* jmap = jvms->map(); 1204 Node* m = NULL; 1205 if (jmap->req() > i) { 1206 m = jmap->in(i); 1207 if (m != n) { 1208 needs_phi = true; 1209 t = t->meet_speculative(gvn.type(m)); 1210 } 1211 } 1212 ins[j] = m; 1213 } 1214 if (needs_phi) { 1215 Node* phi = PhiNode::make(region, n, t); 1216 for (int j = 1; j < results; j++) { 1217 phi->set_req(j + 1, ins[j]); 1218 } 1219 map->set_req(i, gvn.transform(phi)); 1220 } 1221 } 1222 1223 return kit.transfer_exceptions_into_jvms(); 1224 } 1225 1226 //-------------------------UncommonTrapCallGenerator----------------------------- 1227 // Internal class which handles all out-of-line calls checking receiver type. 1228 class UncommonTrapCallGenerator : public CallGenerator { 1229 Deoptimization::DeoptReason _reason; 1230 Deoptimization::DeoptAction _action; 1231 1232 public: 1233 UncommonTrapCallGenerator(ciMethod* m, 1234 Deoptimization::DeoptReason reason, 1235 Deoptimization::DeoptAction action) 1236 : CallGenerator(m) 1237 { 1238 _reason = reason; 1239 _action = action; 1240 } 1241 1242 virtual bool is_virtual() const { ShouldNotReachHere(); return false; } 1243 virtual bool is_trap() const { return true; } 1244 1245 virtual JVMState* generate(JVMState* jvms); 1246 }; 1247 1248 1249 CallGenerator* 1250 CallGenerator::for_uncommon_trap(ciMethod* m, 1251 Deoptimization::DeoptReason reason, 1252 Deoptimization::DeoptAction action) { 1253 return new UncommonTrapCallGenerator(m, reason, action); 1254 } 1255 1256 1257 JVMState* UncommonTrapCallGenerator::generate(JVMState* jvms) { 1258 GraphKit kit(jvms); 1259 kit.C->print_inlining_update(this); 1260 // Take the trap with arguments pushed on the stack. (Cf. null_check_receiver). 1261 // Callsite signature can be different from actual method being called (i.e _linkTo* sites). 1262 // Use callsite signature always. 1263 ciMethod* declared_method = kit.method()->get_method_at_bci(kit.bci()); 1264 int nargs = declared_method->arg_size(); 1265 kit.inc_sp(nargs); 1266 assert(nargs <= kit.sp() && kit.sp() <= jvms->stk_size(), "sane sp w/ args pushed"); 1267 if (_reason == Deoptimization::Reason_class_check && 1268 _action == Deoptimization::Action_maybe_recompile) { 1269 // Temp fix for 6529811 1270 // Don't allow uncommon_trap to override our decision to recompile in the event 1271 // of a class cast failure for a monomorphic call as it will never let us convert 1272 // the call to either bi-morphic or megamorphic and can lead to unc-trap loops 1273 bool keep_exact_action = true; 1274 kit.uncommon_trap(_reason, _action, NULL, "monomorphic vcall checkcast", false, keep_exact_action); 1275 } else { 1276 kit.uncommon_trap(_reason, _action); 1277 } 1278 return kit.transfer_exceptions_into_jvms(); 1279 } 1280 1281 // (Note: Moved hook_up_call to GraphKit::set_edges_for_java_call.) 1282 1283 // (Node: Merged hook_up_exits into ParseGenerator::generate.) 1284 1285 #define NODES_OVERHEAD_PER_METHOD (30.0) 1286 #define NODES_PER_BYTECODE (9.5) 1287 1288 void WarmCallInfo::init(JVMState* call_site, ciMethod* call_method, ciCallProfile& profile, float prof_factor) { 1289 int call_count = profile.count(); 1290 int code_size = call_method->code_size(); 1291 1292 // Expected execution count is based on the historical count: 1293 _count = call_count < 0 ? 1 : call_site->method()->scale_count(call_count, prof_factor); 1294 1295 // Expected profit from inlining, in units of simple call-overheads. 1296 _profit = 1.0; 1297 1298 // Expected work performed by the call in units of call-overheads. 1299 // %%% need an empirical curve fit for "work" (time in call) 1300 float bytecodes_per_call = 3; 1301 _work = 1.0 + code_size / bytecodes_per_call; 1302 1303 // Expected size of compilation graph: 1304 // -XX:+PrintParseStatistics once reported: 1305 // Methods seen: 9184 Methods parsed: 9184 Nodes created: 1582391 1306 // Histogram of 144298 parsed bytecodes: 1307 // %%% Need an better predictor for graph size. 1308 _size = NODES_OVERHEAD_PER_METHOD + (NODES_PER_BYTECODE * code_size); 1309 } 1310 1311 // is_cold: Return true if the node should never be inlined. 1312 // This is true if any of the key metrics are extreme. 1313 bool WarmCallInfo::is_cold() const { 1314 if (count() < WarmCallMinCount) return true; 1315 if (profit() < WarmCallMinProfit) return true; 1316 if (work() > WarmCallMaxWork) return true; 1317 if (size() > WarmCallMaxSize) return true; 1318 return false; 1319 } 1320 1321 // is_hot: Return true if the node should be inlined immediately. 1322 // This is true if any of the key metrics are extreme. 1323 bool WarmCallInfo::is_hot() const { 1324 assert(!is_cold(), "eliminate is_cold cases before testing is_hot"); 1325 if (count() >= HotCallCountThreshold) return true; 1326 if (profit() >= HotCallProfitThreshold) return true; 1327 if (work() <= HotCallTrivialWork) return true; 1328 if (size() <= HotCallTrivialSize) return true; 1329 return false; 1330 } 1331 1332 // compute_heat: 1333 float WarmCallInfo::compute_heat() const { 1334 assert(!is_cold(), "compute heat only on warm nodes"); 1335 assert(!is_hot(), "compute heat only on warm nodes"); 1336 int min_size = MAX2(0, (int)HotCallTrivialSize); 1337 int max_size = MIN2(500, (int)WarmCallMaxSize); 1338 float method_size = (size() - min_size) / MAX2(1, max_size - min_size); 1339 float size_factor; 1340 if (method_size < 0.05) size_factor = 4; // 2 sigmas better than avg. 1341 else if (method_size < 0.15) size_factor = 2; // 1 sigma better than avg. 1342 else if (method_size < 0.5) size_factor = 1; // better than avg. 1343 else size_factor = 0.5; // worse than avg. 1344 return (count() * profit() * size_factor); 1345 } 1346 1347 bool WarmCallInfo::warmer_than(WarmCallInfo* that) { 1348 assert(this != that, "compare only different WCIs"); 1349 assert(this->heat() != 0 && that->heat() != 0, "call compute_heat 1st"); 1350 if (this->heat() > that->heat()) return true; 1351 if (this->heat() < that->heat()) return false; 1352 assert(this->heat() == that->heat(), "no NaN heat allowed"); 1353 // Equal heat. Break the tie some other way. 1354 if (!this->call() || !that->call()) return (address)this > (address)that; 1355 return this->call()->_idx > that->call()->_idx; 1356 } 1357 1358 //#define UNINIT_NEXT ((WarmCallInfo*)badAddress) 1359 #define UNINIT_NEXT ((WarmCallInfo*)NULL) 1360 1361 WarmCallInfo* WarmCallInfo::insert_into(WarmCallInfo* head) { 1362 assert(next() == UNINIT_NEXT, "not yet on any list"); 1363 WarmCallInfo* prev_p = NULL; 1364 WarmCallInfo* next_p = head; 1365 while (next_p != NULL && next_p->warmer_than(this)) { 1366 prev_p = next_p; 1367 next_p = prev_p->next(); 1368 } 1369 // Install this between prev_p and next_p. 1370 this->set_next(next_p); 1371 if (prev_p == NULL) 1372 head = this; 1373 else 1374 prev_p->set_next(this); 1375 return head; 1376 } 1377 1378 WarmCallInfo* WarmCallInfo::remove_from(WarmCallInfo* head) { 1379 WarmCallInfo* prev_p = NULL; 1380 WarmCallInfo* next_p = head; 1381 while (next_p != this) { 1382 assert(next_p != NULL, "this must be in the list somewhere"); 1383 prev_p = next_p; 1384 next_p = prev_p->next(); 1385 } 1386 next_p = this->next(); 1387 debug_only(this->set_next(UNINIT_NEXT)); 1388 // Remove this from between prev_p and next_p. 1389 if (prev_p == NULL) 1390 head = next_p; 1391 else 1392 prev_p->set_next(next_p); 1393 return head; 1394 } 1395 1396 WarmCallInfo WarmCallInfo::_always_hot(WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE(), 1397 WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE()); 1398 WarmCallInfo WarmCallInfo::_always_cold(WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE(), 1399 WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE()); 1400 1401 WarmCallInfo* WarmCallInfo::always_hot() { 1402 assert(_always_hot.is_hot(), "must always be hot"); 1403 return &_always_hot; 1404 } 1405 1406 WarmCallInfo* WarmCallInfo::always_cold() { 1407 assert(_always_cold.is_cold(), "must always be cold"); 1408 return &_always_cold; 1409 } 1410 1411 1412 #ifndef PRODUCT 1413 1414 void WarmCallInfo::print() const { 1415 tty->print("%s : C=%6.1f P=%6.1f W=%6.1f S=%6.1f H=%6.1f -> %p", 1416 is_cold() ? "cold" : is_hot() ? "hot " : "warm", 1417 count(), profit(), work(), size(), compute_heat(), next()); 1418 tty->cr(); 1419 if (call() != NULL) call()->dump(); 1420 } 1421 1422 void print_wci(WarmCallInfo* ci) { 1423 ci->print(); 1424 } 1425 1426 void WarmCallInfo::print_all() const { 1427 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) 1428 p->print(); 1429 } 1430 1431 int WarmCallInfo::count_all() const { 1432 int cnt = 0; 1433 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) 1434 cnt++; 1435 return cnt; 1436 } 1437 1438 #endif //PRODUCT