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 _call_node(NULL), 127 _separate_io_proj(separate_io_proj) 128 { 129 if (ValueTypeReturnedAsFields && method->is_method_handle_intrinsic()) { 130 // If that call has not been optimized by the time optimizations are over, 131 // we'll need to add a call to create a value type instance from the klass 132 // returned by the call (see PhaseMacroExpand::expand_mh_intrinsic_return). 133 // Separating 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 // Make an explicit receiver null_check as part of this call. 166 // Since we share a map with the caller, his JVMS gets adjusted. 167 kit.null_check_receiver_before_call(method()); 168 if (kit.stopped()) { 169 // And dump it back to the caller, decorated with any exceptions: 170 return kit.transfer_exceptions_into_jvms(); 171 } 172 // Mark the call node as virtual, sort of: 173 call->set_optimized_virtual(true); 174 if (method()->is_method_handle_intrinsic() || 175 method()->is_compiled_lambda_form()) { 176 call->set_method_handle_invoke(true); 177 } 178 } 179 kit.set_arguments_for_java_call(call); 180 if (kit.stopped()) { 181 return kit.transfer_exceptions_into_jvms(); 182 } 183 kit.set_edges_for_java_call(call, false, _separate_io_proj); 184 Node* ret = kit.set_results_for_java_call(call, _separate_io_proj); 185 kit.push_node(method()->return_type()->basic_type(), ret); 186 return kit.transfer_exceptions_into_jvms(); 187 } 188 189 //--------------------------VirtualCallGenerator------------------------------ 190 // Internal class which handles all out-of-line calls checking receiver type. 191 class VirtualCallGenerator : public CallGenerator { 192 private: 193 int _vtable_index; 194 public: 195 VirtualCallGenerator(ciMethod* method, int vtable_index) 196 : CallGenerator(method), _vtable_index(vtable_index) 197 { 198 assert(vtable_index == Method::invalid_vtable_index || 199 vtable_index >= 0, "either invalid or usable"); 200 } 201 virtual bool is_virtual() const { return true; } 202 virtual JVMState* generate(JVMState* jvms); 203 }; 204 205 JVMState* VirtualCallGenerator::generate(JVMState* jvms) { 206 GraphKit kit(jvms); 207 Node* receiver = kit.argument(0); 208 kit.C->print_inlining_update(this); 209 210 if (kit.C->log() != NULL) { 211 kit.C->log()->elem("virtual_call bci='%d'", jvms->bci()); 212 } 213 214 // If the receiver is a constant null, do not torture the system 215 // by attempting to call through it. The compile will proceed 216 // correctly, but may bail out in final_graph_reshaping, because 217 // the call instruction will have a seemingly deficient out-count. 218 // (The bailout says something misleading about an "infinite loop".) 219 if (!receiver->is_ValueType() && kit.gvn().type(receiver)->higher_equal(TypePtr::NULL_PTR)) { 220 assert(Bytecodes::is_invoke(kit.java_bc()), "%d: %s", kit.java_bc(), Bytecodes::name(kit.java_bc())); 221 ciMethod* declared_method = kit.method()->get_method_at_bci(kit.bci()); 222 int arg_size = declared_method->signature()->arg_size_for_bc(kit.java_bc()); 223 kit.inc_sp(arg_size); // restore arguments 224 kit.uncommon_trap(Deoptimization::Reason_null_check, 225 Deoptimization::Action_none, 226 NULL, "null receiver"); 227 return kit.transfer_exceptions_into_jvms(); 228 } 229 230 // Ideally we would unconditionally do a null check here and let it 231 // be converted to an implicit check based on profile information. 232 // However currently the conversion to implicit null checks in 233 // Block::implicit_null_check() only looks for loads and stores, not calls. 234 ciMethod *caller = kit.method(); 235 ciMethodData *caller_md = (caller == NULL) ? NULL : caller->method_data(); 236 if (!UseInlineCaches || !ImplicitNullChecks || !os::zero_page_read_protected() || 237 ((ImplicitNullCheckThreshold > 0) && caller_md && 238 (caller_md->trap_count(Deoptimization::Reason_null_check) 239 >= (uint)ImplicitNullCheckThreshold))) { 240 // Make an explicit receiver null_check as part of this call. 241 // Since we share a map with the caller, his JVMS gets adjusted. 242 receiver = kit.null_check_receiver_before_call(method()); 243 if (kit.stopped()) { 244 // And dump it back to the caller, decorated with any exceptions: 245 return kit.transfer_exceptions_into_jvms(); 246 } 247 } 248 249 assert(!method()->is_static(), "virtual call must not be to static"); 250 assert(!method()->is_final(), "virtual call should not be to final"); 251 assert(!method()->is_private(), "virtual call should not be to private"); 252 assert(_vtable_index == Method::invalid_vtable_index || !UseInlineCaches, 253 "no vtable calls if +UseInlineCaches "); 254 address target = SharedRuntime::get_resolve_virtual_call_stub(); 255 // Normal inline cache used for call 256 CallDynamicJavaNode *call = new CallDynamicJavaNode(tf(), target, method(), _vtable_index, kit.bci()); 257 if (is_inlined_method_handle_intrinsic(jvms, method())) { 258 // To be able to issue a direct call (optimized virtual or virtual) 259 // and skip a call to MH.linkTo*/invokeBasic adapter, additional information 260 // about the method being invoked should be attached to the call site to 261 // make resolution logic work (see SharedRuntime::resolve_{virtual,opt_virtual}_call_C). 262 call->set_override_symbolic_info(true); 263 } 264 kit.set_arguments_for_java_call(call); 265 if (kit.stopped()) { 266 return kit.transfer_exceptions_into_jvms(); 267 } 268 kit.set_edges_for_java_call(call); 269 Node* ret = kit.set_results_for_java_call(call); 270 kit.push_node(method()->return_type()->basic_type(), ret); 271 272 // Represent the effect of an implicit receiver null_check 273 // as part of this call. Since we share a map with the caller, 274 // his JVMS gets adjusted. 275 kit.cast_not_null(receiver); 276 return kit.transfer_exceptions_into_jvms(); 277 } 278 279 CallGenerator* CallGenerator::for_inline(ciMethod* m, float expected_uses) { 280 if (InlineTree::check_can_parse(m) != NULL) return NULL; 281 return new ParseGenerator(m, expected_uses); 282 } 283 284 // As a special case, the JVMS passed to this CallGenerator is 285 // for the method execution already in progress, not just the JVMS 286 // of the caller. Thus, this CallGenerator cannot be mixed with others! 287 CallGenerator* CallGenerator::for_osr(ciMethod* m, int osr_bci) { 288 if (InlineTree::check_can_parse(m) != NULL) return NULL; 289 float past_uses = m->interpreter_invocation_count(); 290 float expected_uses = past_uses; 291 return new ParseGenerator(m, expected_uses, true); 292 } 293 294 CallGenerator* CallGenerator::for_direct_call(ciMethod* m, bool separate_io_proj) { 295 assert(!m->is_abstract(), "for_direct_call mismatch"); 296 return new DirectCallGenerator(m, separate_io_proj); 297 } 298 299 CallGenerator* CallGenerator::for_virtual_call(ciMethod* m, int vtable_index) { 300 assert(!m->is_static(), "for_virtual_call mismatch"); 301 assert(!m->is_method_handle_intrinsic(), "should be a direct call"); 302 return new VirtualCallGenerator(m, vtable_index); 303 } 304 305 // Allow inlining decisions to be delayed 306 class LateInlineCallGenerator : public DirectCallGenerator { 307 private: 308 // unique id for log compilation 309 jlong _unique_id; 310 311 protected: 312 CallGenerator* _inline_cg; 313 virtual bool do_late_inline_check(JVMState* jvms) { return true; } 314 315 public: 316 LateInlineCallGenerator(ciMethod* method, CallGenerator* inline_cg) : 317 DirectCallGenerator(method, true), _unique_id(0), _inline_cg(inline_cg) {} 318 319 virtual bool is_late_inline() const { return true; } 320 321 // Convert the CallStaticJava into an inline 322 virtual void do_late_inline(); 323 324 virtual JVMState* generate(JVMState* jvms) { 325 Compile *C = Compile::current(); 326 327 C->log_inline_id(this); 328 329 // Record that this call site should be revisited once the main 330 // parse is finished. 331 if (!is_mh_late_inline()) { 332 C->add_late_inline(this); 333 } 334 335 // Emit the CallStaticJava and request separate projections so 336 // that the late inlining logic can distinguish between fall 337 // through and exceptional uses of the memory and io projections 338 // as is done for allocations and macro expansion. 339 return DirectCallGenerator::generate(jvms); 340 } 341 342 virtual void print_inlining_late(const char* msg) { 343 CallNode* call = call_node(); 344 Compile* C = Compile::current(); 345 C->print_inlining_assert_ready(); 346 C->print_inlining(method(), call->jvms()->depth()-1, call->jvms()->bci(), msg); 347 C->print_inlining_move_to(this); 348 C->print_inlining_update_delayed(this); 349 } 350 351 virtual void set_unique_id(jlong id) { 352 _unique_id = id; 353 } 354 355 virtual jlong unique_id() const { 356 return _unique_id; 357 } 358 }; 359 360 void LateInlineCallGenerator::do_late_inline() { 361 // Can't inline it 362 CallStaticJavaNode* call = call_node(); 363 if (call == NULL || call->outcnt() == 0 || 364 call->in(0) == NULL || call->in(0)->is_top()) { 365 return; 366 } 367 368 const TypeTuple *r = call->tf()->domain_cc(); 369 for (int i1 = 0; i1 < method()->arg_size(); i1++) { 370 if (call->in(TypeFunc::Parms + i1)->is_top() && r->field_at(TypeFunc::Parms + i1) != Type::HALF) { 371 assert(Compile::current()->inlining_incrementally(), "shouldn't happen during parsing"); 372 return; 373 } 374 } 375 376 if (call->in(TypeFunc::Memory)->is_top()) { 377 assert(Compile::current()->inlining_incrementally(), "shouldn't happen during parsing"); 378 return; 379 } 380 381 // check for unreachable loop 382 CallProjections* callprojs = call->extract_projections(true); 383 if (callprojs->fallthrough_catchproj == call->in(0) || 384 callprojs->catchall_catchproj == call->in(0) || 385 callprojs->fallthrough_memproj == call->in(TypeFunc::Memory) || 386 callprojs->catchall_memproj == call->in(TypeFunc::Memory) || 387 callprojs->fallthrough_ioproj == call->in(TypeFunc::I_O) || 388 callprojs->catchall_ioproj == call->in(TypeFunc::I_O) || 389 (callprojs->exobj != NULL && call->find_edge(callprojs->exobj) != -1)) { 390 return; 391 } 392 for (uint i = 0; i < callprojs->nb_resproj; i++) { 393 if (callprojs->resproj[i] != NULL && call->find_edge(callprojs->resproj[i]) != -1) { 394 return; 395 } 396 } 397 398 399 Compile* C = Compile::current(); 400 // Remove inlined methods from Compiler's lists. 401 if (call->is_macro()) { 402 C->remove_macro_node(call); 403 } 404 405 // Make a clone of the JVMState that appropriate to use for driving a parse 406 JVMState* old_jvms = call->jvms(); 407 JVMState* jvms = old_jvms->clone_shallow(C); 408 uint size = call->req(); 409 SafePointNode* map = new SafePointNode(size, jvms); 410 for (uint i1 = 0; i1 < size; i1++) { 411 map->init_req(i1, call->in(i1)); 412 } 413 414 PhaseGVN& gvn = *C->initial_gvn(); 415 // Make sure the state is a MergeMem for parsing. 416 if (!map->in(TypeFunc::Memory)->is_MergeMem()) { 417 Node* mem = MergeMemNode::make(map->in(TypeFunc::Memory)); 418 gvn.set_type_bottom(mem); 419 map->set_req(TypeFunc::Memory, mem); 420 } 421 422 // blow away old call arguments 423 Node* top = C->top(); 424 for (uint i1 = TypeFunc::Parms; i1 < call->_tf->domain_cc()->cnt(); i1++) { 425 map->set_req(i1, top); 426 } 427 jvms->set_map(map); 428 429 // Make enough space in the expression stack to transfer 430 // the incoming arguments and return value. 431 map->ensure_stack(jvms, jvms->method()->max_stack()); 432 const TypeTuple *domain_sig = call->_tf->domain_sig(); 433 uint nargs = method()->arg_size(); 434 assert(domain_sig->cnt() - TypeFunc::Parms == nargs, "inconsistent signature"); 435 436 uint j = TypeFunc::Parms; 437 for (uint i1 = 0; i1 < nargs; i1++) { 438 const Type* t = domain_sig->field_at(TypeFunc::Parms + i1); 439 if (method()->get_Method()->has_scalarized_args()) { 440 GraphKit arg_kit(jvms, &gvn); 441 // TODO for now, don't scalarize value type receivers because of interface calls 442 if (t->is_valuetypeptr() && (method()->is_static() || i1 != 0)) { 443 arg_kit.set_control(map->control()); 444 ValueTypeNode* vt = ValueTypeNode::make_from_multi(&arg_kit, call, t->value_klass(), j, true); 445 map->set_control(arg_kit.control()); 446 map->set_argument(jvms, i1, vt); 447 } else { 448 int index = j; 449 SigEntry res_entry = method()->get_Method()->get_res_entry(); 450 if (res_entry._offset != -1 && (index - TypeFunc::Parms) >= res_entry._offset) { 451 // Skip reserved entry 452 index += type2size[res_entry._bt]; 453 } 454 map->set_argument(jvms, i1, call->in(index)); 455 j++; 456 } 457 } else { 458 Node* arg = call->in(TypeFunc::Parms + i1); 459 map->set_argument(jvms, i1, arg); 460 } 461 } 462 463 C->print_inlining_assert_ready(); 464 465 C->print_inlining_move_to(this); 466 467 C->log_late_inline(this); 468 469 // This check is done here because for_method_handle_inline() method 470 // needs jvms for inlined state. 471 if (!do_late_inline_check(jvms)) { 472 map->disconnect_inputs(NULL, C); 473 return; 474 } 475 476 // Setup default node notes to be picked up by the inlining 477 Node_Notes* old_nn = C->node_notes_at(call->_idx); 478 if (old_nn != NULL) { 479 Node_Notes* entry_nn = old_nn->clone(C); 480 entry_nn->set_jvms(jvms); 481 C->set_default_node_notes(entry_nn); 482 } 483 484 // Now perform the inlining using the synthesized JVMState 485 JVMState* new_jvms = _inline_cg->generate(jvms); 486 if (new_jvms == NULL) return; // no change 487 if (C->failing()) return; 488 489 // Capture any exceptional control flow 490 GraphKit kit(new_jvms); 491 492 // Find the result object 493 Node* result = C->top(); 494 ciType* return_type = _inline_cg->method()->return_type(); 495 int result_size = return_type->size(); 496 if (result_size != 0 && !kit.stopped()) { 497 result = (result_size == 1) ? kit.pop() : kit.pop_pair(); 498 } 499 500 C->set_has_loops(C->has_loops() || _inline_cg->method()->has_loops()); 501 C->env()->notice_inlined_method(_inline_cg->method()); 502 C->set_inlining_progress(true); 503 504 // Handle value type returns 505 bool returned_as_fields = call->tf()->returns_value_type_as_fields(); 506 if (result->is_ValueType()) { 507 ValueTypeNode* vt = result->as_ValueType(); 508 if (returned_as_fields) { 509 // Return of multiple values (the fields of a value type) 510 vt->replace_call_results(&kit, call, C); 511 if (vt->is_allocated(&gvn) && !StressValueTypeReturnedAsFields) { 512 result = vt->get_oop(); 513 } else { 514 result = vt->tagged_klass(gvn); 515 } 516 } else { 517 result = ValueTypePtrNode::make_from_value_type(&kit, vt); 518 } 519 } else if (gvn.type(result)->is_valuetypeptr() && returned_as_fields) { 520 const Type* vt_t = call->_tf->range_sig()->field_at(TypeFunc::Parms); 521 Node* cast = new CheckCastPPNode(NULL, result, vt_t); 522 gvn.record_for_igvn(cast); 523 ValueTypePtrNode* vtptr = ValueTypePtrNode::make_from_oop(&kit, gvn.transform(cast)); 524 vtptr->replace_call_results(&kit, call, C); 525 result = cast; 526 } 527 528 kit.replace_call(call, result, true); 529 } 530 531 532 CallGenerator* CallGenerator::for_late_inline(ciMethod* method, CallGenerator* inline_cg) { 533 return new LateInlineCallGenerator(method, inline_cg); 534 } 535 536 class LateInlineMHCallGenerator : public LateInlineCallGenerator { 537 ciMethod* _caller; 538 int _attempt; 539 bool _input_not_const; 540 541 virtual bool do_late_inline_check(JVMState* jvms); 542 virtual bool already_attempted() const { return _attempt > 0; } 543 544 public: 545 LateInlineMHCallGenerator(ciMethod* caller, ciMethod* callee, bool input_not_const) : 546 LateInlineCallGenerator(callee, NULL), _caller(caller), _attempt(0), _input_not_const(input_not_const) {} 547 548 virtual bool is_mh_late_inline() const { return true; } 549 550 virtual JVMState* generate(JVMState* jvms) { 551 JVMState* new_jvms = LateInlineCallGenerator::generate(jvms); 552 553 Compile* C = Compile::current(); 554 if (_input_not_const) { 555 // inlining won't be possible so no need to enqueue right now. 556 call_node()->set_generator(this); 557 } else { 558 C->add_late_inline(this); 559 } 560 return new_jvms; 561 } 562 }; 563 564 bool LateInlineMHCallGenerator::do_late_inline_check(JVMState* jvms) { 565 566 CallGenerator* cg = for_method_handle_inline(jvms, _caller, method(), _input_not_const, AlwaysIncrementalInline); 567 568 Compile::current()->print_inlining_update_delayed(this); 569 570 if (!_input_not_const) { 571 _attempt++; 572 } 573 574 if (cg != NULL && (cg->is_inline() || cg->is_inlined_method_handle_intrinsic(jvms, cg->method()))) { 575 assert(!cg->is_late_inline(), "we're doing late inlining"); 576 _inline_cg = cg; 577 Compile::current()->dec_number_of_mh_late_inlines(); 578 return true; 579 } 580 581 call_node()->set_generator(this); 582 return false; 583 } 584 585 CallGenerator* CallGenerator::for_mh_late_inline(ciMethod* caller, ciMethod* callee, bool input_not_const) { 586 Compile::current()->inc_number_of_mh_late_inlines(); 587 CallGenerator* cg = new LateInlineMHCallGenerator(caller, callee, input_not_const); 588 return cg; 589 } 590 591 class LateInlineStringCallGenerator : public LateInlineCallGenerator { 592 593 public: 594 LateInlineStringCallGenerator(ciMethod* method, CallGenerator* inline_cg) : 595 LateInlineCallGenerator(method, inline_cg) {} 596 597 virtual JVMState* generate(JVMState* jvms) { 598 Compile *C = Compile::current(); 599 600 C->log_inline_id(this); 601 602 C->add_string_late_inline(this); 603 604 JVMState* new_jvms = DirectCallGenerator::generate(jvms); 605 return new_jvms; 606 } 607 608 virtual bool is_string_late_inline() const { return true; } 609 }; 610 611 CallGenerator* CallGenerator::for_string_late_inline(ciMethod* method, CallGenerator* inline_cg) { 612 return new LateInlineStringCallGenerator(method, inline_cg); 613 } 614 615 class LateInlineBoxingCallGenerator : public LateInlineCallGenerator { 616 617 public: 618 LateInlineBoxingCallGenerator(ciMethod* method, CallGenerator* inline_cg) : 619 LateInlineCallGenerator(method, inline_cg) {} 620 621 virtual JVMState* generate(JVMState* jvms) { 622 Compile *C = Compile::current(); 623 624 C->log_inline_id(this); 625 626 C->add_boxing_late_inline(this); 627 628 JVMState* new_jvms = DirectCallGenerator::generate(jvms); 629 return new_jvms; 630 } 631 }; 632 633 CallGenerator* CallGenerator::for_boxing_late_inline(ciMethod* method, CallGenerator* inline_cg) { 634 return new LateInlineBoxingCallGenerator(method, inline_cg); 635 } 636 637 //---------------------------WarmCallGenerator-------------------------------- 638 // Internal class which handles initial deferral of inlining decisions. 639 class WarmCallGenerator : public CallGenerator { 640 WarmCallInfo* _call_info; 641 CallGenerator* _if_cold; 642 CallGenerator* _if_hot; 643 bool _is_virtual; // caches virtuality of if_cold 644 bool _is_inline; // caches inline-ness of if_hot 645 646 public: 647 WarmCallGenerator(WarmCallInfo* ci, 648 CallGenerator* if_cold, 649 CallGenerator* if_hot) 650 : CallGenerator(if_cold->method()) 651 { 652 assert(method() == if_hot->method(), "consistent choices"); 653 _call_info = ci; 654 _if_cold = if_cold; 655 _if_hot = if_hot; 656 _is_virtual = if_cold->is_virtual(); 657 _is_inline = if_hot->is_inline(); 658 } 659 660 virtual bool is_inline() const { return _is_inline; } 661 virtual bool is_virtual() const { return _is_virtual; } 662 virtual bool is_deferred() const { return true; } 663 664 virtual JVMState* generate(JVMState* jvms); 665 }; 666 667 668 CallGenerator* CallGenerator::for_warm_call(WarmCallInfo* ci, 669 CallGenerator* if_cold, 670 CallGenerator* if_hot) { 671 return new WarmCallGenerator(ci, if_cold, if_hot); 672 } 673 674 JVMState* WarmCallGenerator::generate(JVMState* jvms) { 675 Compile* C = Compile::current(); 676 C->print_inlining_update(this); 677 678 if (C->log() != NULL) { 679 C->log()->elem("warm_call bci='%d'", jvms->bci()); 680 } 681 jvms = _if_cold->generate(jvms); 682 if (jvms != NULL) { 683 Node* m = jvms->map()->control(); 684 if (m->is_CatchProj()) m = m->in(0); else m = C->top(); 685 if (m->is_Catch()) m = m->in(0); else m = C->top(); 686 if (m->is_Proj()) m = m->in(0); else m = C->top(); 687 if (m->is_CallJava()) { 688 _call_info->set_call(m->as_Call()); 689 _call_info->set_hot_cg(_if_hot); 690 #ifndef PRODUCT 691 if (PrintOpto || PrintOptoInlining) { 692 tty->print_cr("Queueing for warm inlining at bci %d:", jvms->bci()); 693 tty->print("WCI: "); 694 _call_info->print(); 695 } 696 #endif 697 _call_info->set_heat(_call_info->compute_heat()); 698 C->set_warm_calls(_call_info->insert_into(C->warm_calls())); 699 } 700 } 701 return jvms; 702 } 703 704 void WarmCallInfo::make_hot() { 705 Unimplemented(); 706 } 707 708 void WarmCallInfo::make_cold() { 709 // No action: Just dequeue. 710 } 711 712 713 //------------------------PredictedCallGenerator------------------------------ 714 // Internal class which handles all out-of-line calls checking receiver type. 715 class PredictedCallGenerator : public CallGenerator { 716 ciKlass* _predicted_receiver; 717 CallGenerator* _if_missed; 718 CallGenerator* _if_hit; 719 float _hit_prob; 720 721 public: 722 PredictedCallGenerator(ciKlass* predicted_receiver, 723 CallGenerator* if_missed, 724 CallGenerator* if_hit, float hit_prob) 725 : CallGenerator(if_missed->method()) 726 { 727 // The call profile data may predict the hit_prob as extreme as 0 or 1. 728 // Remove the extremes values from the range. 729 if (hit_prob > PROB_MAX) hit_prob = PROB_MAX; 730 if (hit_prob < PROB_MIN) hit_prob = PROB_MIN; 731 732 _predicted_receiver = predicted_receiver; 733 _if_missed = if_missed; 734 _if_hit = if_hit; 735 _hit_prob = hit_prob; 736 } 737 738 virtual bool is_virtual() const { return true; } 739 virtual bool is_inline() const { return _if_hit->is_inline(); } 740 virtual bool is_deferred() const { return _if_hit->is_deferred(); } 741 742 virtual JVMState* generate(JVMState* jvms); 743 }; 744 745 746 CallGenerator* CallGenerator::for_predicted_call(ciKlass* predicted_receiver, 747 CallGenerator* if_missed, 748 CallGenerator* if_hit, 749 float hit_prob) { 750 return new PredictedCallGenerator(predicted_receiver, if_missed, if_hit, hit_prob); 751 } 752 753 754 JVMState* PredictedCallGenerator::generate(JVMState* jvms) { 755 GraphKit kit(jvms); 756 kit.C->print_inlining_update(this); 757 PhaseGVN& gvn = kit.gvn(); 758 // We need an explicit receiver null_check before checking its type. 759 // We share a map with the caller, so his JVMS gets adjusted. 760 Node* receiver = kit.argument(0); 761 CompileLog* log = kit.C->log(); 762 if (log != NULL) { 763 log->elem("predicted_call bci='%d' klass='%d'", 764 jvms->bci(), log->identify(_predicted_receiver)); 765 } 766 767 receiver = kit.null_check_receiver_before_call(method()); 768 if (kit.stopped()) { 769 return kit.transfer_exceptions_into_jvms(); 770 } 771 772 // Make a copy of the replaced nodes in case we need to restore them 773 ReplacedNodes replaced_nodes = kit.map()->replaced_nodes(); 774 replaced_nodes.clone(); 775 776 Node* exact_receiver = receiver; // will get updated in place... 777 Node* slow_ctl = kit.type_check_receiver(receiver, 778 _predicted_receiver, _hit_prob, 779 &exact_receiver); 780 781 SafePointNode* slow_map = NULL; 782 JVMState* slow_jvms = NULL; 783 { PreserveJVMState pjvms(&kit); 784 kit.set_control(slow_ctl); 785 if (!kit.stopped()) { 786 slow_jvms = _if_missed->generate(kit.sync_jvms()); 787 if (kit.failing()) 788 return NULL; // might happen because of NodeCountInliningCutoff 789 assert(slow_jvms != NULL, "must be"); 790 kit.add_exception_states_from(slow_jvms); 791 kit.set_map(slow_jvms->map()); 792 if (!kit.stopped()) 793 slow_map = kit.stop(); 794 } 795 } 796 797 if (kit.stopped()) { 798 // Instance exactly does not matches the desired type. 799 kit.set_jvms(slow_jvms); 800 return kit.transfer_exceptions_into_jvms(); 801 } 802 803 // fall through if the instance exactly matches the desired type 804 kit.replace_in_map(receiver, exact_receiver); 805 806 // Make the hot call: 807 JVMState* new_jvms = _if_hit->generate(kit.sync_jvms()); 808 if (new_jvms == NULL) { 809 // Inline failed, so make a direct call. 810 assert(_if_hit->is_inline(), "must have been a failed inline"); 811 CallGenerator* cg = CallGenerator::for_direct_call(_if_hit->method()); 812 new_jvms = cg->generate(kit.sync_jvms()); 813 } 814 kit.add_exception_states_from(new_jvms); 815 kit.set_jvms(new_jvms); 816 817 // Need to merge slow and fast? 818 if (slow_map == NULL) { 819 // The fast path is the only path remaining. 820 return kit.transfer_exceptions_into_jvms(); 821 } 822 823 if (kit.stopped()) { 824 // Inlined method threw an exception, so it's just the slow path after all. 825 kit.set_jvms(slow_jvms); 826 return kit.transfer_exceptions_into_jvms(); 827 } 828 829 // Allocate value types if they are merged with objects (similar to Parse::merge_common()) 830 uint tos = kit.jvms()->stkoff() + kit.sp(); 831 uint limit = slow_map->req(); 832 for (uint i = TypeFunc::Parms; i < limit; i++) { 833 Node* m = kit.map()->in(i); 834 Node* n = slow_map->in(i); 835 const Type* t = gvn.type(m)->meet_speculative(gvn.type(n)); 836 if (m->is_ValueType() && !t->isa_valuetype()) { 837 // Allocate value type in fast path 838 m = ValueTypePtrNode::make_from_value_type(&kit, m->as_ValueType()); 839 kit.map()->set_req(i, m); 840 } 841 if (n->is_ValueType() && !t->isa_valuetype()) { 842 // Allocate value type in slow path 843 PreserveJVMState pjvms(&kit); 844 kit.set_map(slow_map); 845 n = ValueTypePtrNode::make_from_value_type(&kit, n->as_ValueType()); 846 kit.map()->set_req(i, n); 847 slow_map = kit.stop(); 848 } 849 } 850 851 // There are 2 branches and the replaced nodes are only valid on 852 // one: restore the replaced nodes to what they were before the 853 // branch. 854 kit.map()->set_replaced_nodes(replaced_nodes); 855 856 // Finish the diamond. 857 kit.C->set_has_split_ifs(true); // Has chance for split-if optimization 858 RegionNode* region = new RegionNode(3); 859 region->init_req(1, kit.control()); 860 region->init_req(2, slow_map->control()); 861 kit.set_control(gvn.transform(region)); 862 Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO); 863 iophi->set_req(2, slow_map->i_o()); 864 kit.set_i_o(gvn.transform(iophi)); 865 // Merge memory 866 kit.merge_memory(slow_map->merged_memory(), region, 2); 867 // Transform new memory Phis. 868 for (MergeMemStream mms(kit.merged_memory()); mms.next_non_empty();) { 869 Node* phi = mms.memory(); 870 if (phi->is_Phi() && phi->in(0) == region) { 871 mms.set_memory(gvn.transform(phi)); 872 } 873 } 874 for (uint i = TypeFunc::Parms; i < limit; i++) { 875 // Skip unused stack slots; fast forward to monoff(); 876 if (i == tos) { 877 i = kit.jvms()->monoff(); 878 if( i >= limit ) break; 879 } 880 Node* m = kit.map()->in(i); 881 Node* n = slow_map->in(i); 882 if (m != n) { 883 const Type* t = gvn.type(m)->meet_speculative(gvn.type(n)); 884 Node* phi = PhiNode::make(region, m, t); 885 phi->set_req(2, n); 886 kit.map()->set_req(i, gvn.transform(phi)); 887 } 888 } 889 return kit.transfer_exceptions_into_jvms(); 890 } 891 892 893 CallGenerator* CallGenerator::for_method_handle_call(JVMState* jvms, ciMethod* caller, ciMethod* callee, bool delayed_forbidden) { 894 assert(callee->is_method_handle_intrinsic(), "for_method_handle_call mismatch"); 895 bool input_not_const; 896 CallGenerator* cg = CallGenerator::for_method_handle_inline(jvms, caller, callee, input_not_const, false); 897 Compile* C = Compile::current(); 898 if (cg != NULL) { 899 if (!delayed_forbidden && AlwaysIncrementalInline) { 900 return CallGenerator::for_late_inline(callee, cg); 901 } else { 902 return cg; 903 } 904 } 905 int bci = jvms->bci(); 906 ciCallProfile profile = caller->call_profile_at_bci(bci); 907 int call_site_count = caller->scale_count(profile.count()); 908 909 if (IncrementalInline && (AlwaysIncrementalInline || 910 (call_site_count > 0 && (input_not_const || !C->inlining_incrementally() || C->over_inlining_cutoff())))) { 911 return CallGenerator::for_mh_late_inline(caller, callee, input_not_const); 912 } else { 913 // Out-of-line call. 914 return CallGenerator::for_direct_call(callee); 915 } 916 } 917 918 static void cast_argument(int nargs, int arg_nb, ciType* t, GraphKit& kit) { 919 PhaseGVN& gvn = kit.gvn(); 920 Node* arg = kit.argument(arg_nb); 921 const Type* arg_type = arg->bottom_type(); 922 const Type* sig_type = TypeOopPtr::make_from_klass(t->as_klass()); 923 if (arg_type->isa_oopptr() && !arg_type->higher_equal(sig_type)) { 924 arg = gvn.transform(new CheckCastPPNode(kit.control(), arg, sig_type)); 925 kit.set_argument(arg_nb, arg); 926 } 927 if (sig_type->is_valuetypeptr() && !arg->is_ValueType() && 928 !kit.gvn().type(arg)->maybe_null() && t->as_value_klass()->is_scalarizable()) { 929 arg = ValueTypeNode::make_from_oop(&kit, arg, t->as_value_klass()); 930 kit.set_argument(arg_nb, arg); 931 } 932 } 933 934 CallGenerator* CallGenerator::for_method_handle_inline(JVMState* jvms, ciMethod* caller, ciMethod* callee, bool& input_not_const, bool delayed_forbidden) { 935 GraphKit kit(jvms); 936 PhaseGVN& gvn = kit.gvn(); 937 Compile* C = kit.C; 938 vmIntrinsics::ID iid = callee->intrinsic_id(); 939 input_not_const = true; 940 switch (iid) { 941 case vmIntrinsics::_invokeBasic: 942 { 943 // Get MethodHandle receiver: 944 Node* receiver = kit.argument(0); 945 if (receiver->Opcode() == Op_ConP) { 946 input_not_const = false; 947 const TypeOopPtr* oop_ptr = receiver->bottom_type()->is_oopptr(); 948 ciMethod* target = oop_ptr->const_oop()->as_method_handle()->get_vmtarget(); 949 const int vtable_index = Method::invalid_vtable_index; 950 951 if (!ciMethod::is_consistent_info(callee, target)) { 952 print_inlining_failure(C, callee, jvms->depth() - 1, jvms->bci(), 953 "signatures mismatch"); 954 return NULL; 955 } 956 957 CallGenerator* cg = C->call_generator(target, vtable_index, 958 false /* call_does_dispatch */, 959 jvms, 960 true /* allow_inline */, 961 PROB_ALWAYS, 962 NULL, 963 true, 964 delayed_forbidden); 965 return cg; 966 } else { 967 print_inlining_failure(C, callee, jvms->depth() - 1, jvms->bci(), 968 "receiver not constant"); 969 } 970 } 971 break; 972 973 case vmIntrinsics::_linkToVirtual: 974 case vmIntrinsics::_linkToStatic: 975 case vmIntrinsics::_linkToSpecial: 976 case vmIntrinsics::_linkToInterface: 977 { 978 int nargs = callee->arg_size(); 979 // Get MemberName argument: 980 Node* member_name = kit.argument(nargs - 1); 981 if (member_name->Opcode() == Op_ConP) { 982 input_not_const = false; 983 const TypeOopPtr* oop_ptr = member_name->bottom_type()->is_oopptr(); 984 ciMethod* target = oop_ptr->const_oop()->as_member_name()->get_vmtarget(); 985 986 if (!ciMethod::is_consistent_info(callee, target)) { 987 print_inlining_failure(C, callee, jvms->depth() - 1, jvms->bci(), 988 "signatures mismatch"); 989 return NULL; 990 } 991 992 // In lambda forms we erase signature types to avoid resolving issues 993 // involving class loaders. When we optimize a method handle invoke 994 // to a direct call we must cast the receiver and arguments to its 995 // actual types. 996 ciSignature* signature = target->signature(); 997 const int receiver_skip = target->is_static() ? 0 : 1; 998 // Cast receiver to its type. 999 if (!target->is_static()) { 1000 cast_argument(nargs, 0, signature->accessing_klass(), kit); 1001 } 1002 // Cast reference arguments to its type. 1003 for (int i = 0, j = 0; i < signature->count(); i++) { 1004 ciType* t = signature->type_at(i); 1005 if (t->is_klass()) { 1006 cast_argument(nargs, receiver_skip + j, t, kit); 1007 } 1008 j += t->size(); // long and double take two slots 1009 } 1010 1011 // Try to get the most accurate receiver type 1012 const bool is_virtual = (iid == vmIntrinsics::_linkToVirtual); 1013 const bool is_virtual_or_interface = (is_virtual || iid == vmIntrinsics::_linkToInterface); 1014 int vtable_index = Method::invalid_vtable_index; 1015 bool call_does_dispatch = false; 1016 1017 ciKlass* speculative_receiver_type = NULL; 1018 if (is_virtual_or_interface) { 1019 ciInstanceKlass* klass = target->holder(); 1020 Node* receiver_node = kit.argument(0); 1021 const TypeOopPtr* receiver_type = gvn.type(receiver_node)->isa_oopptr(); 1022 // call_does_dispatch and vtable_index are out-parameters. They might be changed. 1023 // optimize_virtual_call() takes 2 different holder 1024 // arguments for a corner case that doesn't apply here (see 1025 // Parse::do_call()) 1026 target = C->optimize_virtual_call(caller, jvms->bci(), klass, klass, 1027 target, receiver_type, is_virtual, 1028 call_does_dispatch, vtable_index, // out-parameters 1029 false /* check_access */); 1030 // We lack profiling at this call but type speculation may 1031 // provide us with a type 1032 speculative_receiver_type = (receiver_type != NULL) ? receiver_type->speculative_type() : NULL; 1033 } 1034 CallGenerator* cg = C->call_generator(target, vtable_index, call_does_dispatch, jvms, 1035 !StressMethodHandleLinkerInlining /* allow_inline */, 1036 PROB_ALWAYS, 1037 speculative_receiver_type, 1038 true, 1039 delayed_forbidden); 1040 return cg; 1041 } else { 1042 print_inlining_failure(C, callee, jvms->depth() - 1, jvms->bci(), 1043 "member_name not constant"); 1044 } 1045 } 1046 break; 1047 1048 default: 1049 fatal("unexpected intrinsic %d: %s", iid, vmIntrinsics::name_at(iid)); 1050 break; 1051 } 1052 return NULL; 1053 } 1054 1055 1056 //------------------------PredicatedIntrinsicGenerator------------------------------ 1057 // Internal class which handles all predicated Intrinsic calls. 1058 class PredicatedIntrinsicGenerator : public CallGenerator { 1059 CallGenerator* _intrinsic; 1060 CallGenerator* _cg; 1061 1062 public: 1063 PredicatedIntrinsicGenerator(CallGenerator* intrinsic, 1064 CallGenerator* cg) 1065 : CallGenerator(cg->method()) 1066 { 1067 _intrinsic = intrinsic; 1068 _cg = cg; 1069 } 1070 1071 virtual bool is_virtual() const { return true; } 1072 virtual bool is_inlined() const { return true; } 1073 virtual bool is_intrinsic() const { return true; } 1074 1075 virtual JVMState* generate(JVMState* jvms); 1076 }; 1077 1078 1079 CallGenerator* CallGenerator::for_predicated_intrinsic(CallGenerator* intrinsic, 1080 CallGenerator* cg) { 1081 return new PredicatedIntrinsicGenerator(intrinsic, cg); 1082 } 1083 1084 1085 JVMState* PredicatedIntrinsicGenerator::generate(JVMState* jvms) { 1086 // The code we want to generate here is: 1087 // if (receiver == NULL) 1088 // uncommon_Trap 1089 // if (predicate(0)) 1090 // do_intrinsic(0) 1091 // else 1092 // if (predicate(1)) 1093 // do_intrinsic(1) 1094 // ... 1095 // else 1096 // do_java_comp 1097 1098 GraphKit kit(jvms); 1099 PhaseGVN& gvn = kit.gvn(); 1100 1101 CompileLog* log = kit.C->log(); 1102 if (log != NULL) { 1103 log->elem("predicated_intrinsic bci='%d' method='%d'", 1104 jvms->bci(), log->identify(method())); 1105 } 1106 1107 if (!method()->is_static()) { 1108 // We need an explicit receiver null_check before checking its type in predicate. 1109 // We share a map with the caller, so his JVMS gets adjusted. 1110 Node* receiver = kit.null_check_receiver_before_call(method()); 1111 if (kit.stopped()) { 1112 return kit.transfer_exceptions_into_jvms(); 1113 } 1114 } 1115 1116 int n_predicates = _intrinsic->predicates_count(); 1117 assert(n_predicates > 0, "sanity"); 1118 1119 JVMState** result_jvms = NEW_RESOURCE_ARRAY(JVMState*, (n_predicates+1)); 1120 1121 // Region for normal compilation code if intrinsic failed. 1122 Node* slow_region = new RegionNode(1); 1123 1124 int results = 0; 1125 for (int predicate = 0; (predicate < n_predicates) && !kit.stopped(); predicate++) { 1126 #ifdef ASSERT 1127 JVMState* old_jvms = kit.jvms(); 1128 SafePointNode* old_map = kit.map(); 1129 Node* old_io = old_map->i_o(); 1130 Node* old_mem = old_map->memory(); 1131 Node* old_exc = old_map->next_exception(); 1132 #endif 1133 Node* else_ctrl = _intrinsic->generate_predicate(kit.sync_jvms(), predicate); 1134 #ifdef ASSERT 1135 // Assert(no_new_memory && no_new_io && no_new_exceptions) after generate_predicate. 1136 assert(old_jvms == kit.jvms(), "generate_predicate should not change jvm state"); 1137 SafePointNode* new_map = kit.map(); 1138 assert(old_io == new_map->i_o(), "generate_predicate should not change i_o"); 1139 assert(old_mem == new_map->memory(), "generate_predicate should not change memory"); 1140 assert(old_exc == new_map->next_exception(), "generate_predicate should not add exceptions"); 1141 #endif 1142 if (!kit.stopped()) { 1143 PreserveJVMState pjvms(&kit); 1144 // Generate intrinsic code: 1145 JVMState* new_jvms = _intrinsic->generate(kit.sync_jvms()); 1146 if (new_jvms == NULL) { 1147 // Intrinsic failed, use normal compilation path for this predicate. 1148 slow_region->add_req(kit.control()); 1149 } else { 1150 kit.add_exception_states_from(new_jvms); 1151 kit.set_jvms(new_jvms); 1152 if (!kit.stopped()) { 1153 result_jvms[results++] = kit.jvms(); 1154 } 1155 } 1156 } 1157 if (else_ctrl == NULL) { 1158 else_ctrl = kit.C->top(); 1159 } 1160 kit.set_control(else_ctrl); 1161 } 1162 if (!kit.stopped()) { 1163 // Final 'else' after predicates. 1164 slow_region->add_req(kit.control()); 1165 } 1166 if (slow_region->req() > 1) { 1167 PreserveJVMState pjvms(&kit); 1168 // Generate normal compilation code: 1169 kit.set_control(gvn.transform(slow_region)); 1170 JVMState* new_jvms = _cg->generate(kit.sync_jvms()); 1171 if (kit.failing()) 1172 return NULL; // might happen because of NodeCountInliningCutoff 1173 assert(new_jvms != NULL, "must be"); 1174 kit.add_exception_states_from(new_jvms); 1175 kit.set_jvms(new_jvms); 1176 if (!kit.stopped()) { 1177 result_jvms[results++] = kit.jvms(); 1178 } 1179 } 1180 1181 if (results == 0) { 1182 // All paths ended in uncommon traps. 1183 (void) kit.stop(); 1184 return kit.transfer_exceptions_into_jvms(); 1185 } 1186 1187 if (results == 1) { // Only one path 1188 kit.set_jvms(result_jvms[0]); 1189 return kit.transfer_exceptions_into_jvms(); 1190 } 1191 1192 // Merge all paths. 1193 kit.C->set_has_split_ifs(true); // Has chance for split-if optimization 1194 RegionNode* region = new RegionNode(results + 1); 1195 Node* iophi = PhiNode::make(region, kit.i_o(), Type::ABIO); 1196 for (int i = 0; i < results; i++) { 1197 JVMState* jvms = result_jvms[i]; 1198 int path = i + 1; 1199 SafePointNode* map = jvms->map(); 1200 region->init_req(path, map->control()); 1201 iophi->set_req(path, map->i_o()); 1202 if (i == 0) { 1203 kit.set_jvms(jvms); 1204 } else { 1205 kit.merge_memory(map->merged_memory(), region, path); 1206 } 1207 } 1208 kit.set_control(gvn.transform(region)); 1209 kit.set_i_o(gvn.transform(iophi)); 1210 // Transform new memory Phis. 1211 for (MergeMemStream mms(kit.merged_memory()); mms.next_non_empty();) { 1212 Node* phi = mms.memory(); 1213 if (phi->is_Phi() && phi->in(0) == region) { 1214 mms.set_memory(gvn.transform(phi)); 1215 } 1216 } 1217 1218 // Merge debug info. 1219 Node** ins = NEW_RESOURCE_ARRAY(Node*, results); 1220 uint tos = kit.jvms()->stkoff() + kit.sp(); 1221 Node* map = kit.map(); 1222 uint limit = map->req(); 1223 for (uint i = TypeFunc::Parms; i < limit; i++) { 1224 // Skip unused stack slots; fast forward to monoff(); 1225 if (i == tos) { 1226 i = kit.jvms()->monoff(); 1227 if( i >= limit ) break; 1228 } 1229 Node* n = map->in(i); 1230 ins[0] = n; 1231 const Type* t = gvn.type(n); 1232 bool needs_phi = false; 1233 for (int j = 1; j < results; j++) { 1234 JVMState* jvms = result_jvms[j]; 1235 Node* jmap = jvms->map(); 1236 Node* m = NULL; 1237 if (jmap->req() > i) { 1238 m = jmap->in(i); 1239 if (m != n) { 1240 needs_phi = true; 1241 t = t->meet_speculative(gvn.type(m)); 1242 } 1243 } 1244 ins[j] = m; 1245 } 1246 if (needs_phi) { 1247 Node* phi = PhiNode::make(region, n, t); 1248 for (int j = 1; j < results; j++) { 1249 phi->set_req(j + 1, ins[j]); 1250 } 1251 map->set_req(i, gvn.transform(phi)); 1252 } 1253 } 1254 1255 return kit.transfer_exceptions_into_jvms(); 1256 } 1257 1258 //-------------------------UncommonTrapCallGenerator----------------------------- 1259 // Internal class which handles all out-of-line calls checking receiver type. 1260 class UncommonTrapCallGenerator : public CallGenerator { 1261 Deoptimization::DeoptReason _reason; 1262 Deoptimization::DeoptAction _action; 1263 1264 public: 1265 UncommonTrapCallGenerator(ciMethod* m, 1266 Deoptimization::DeoptReason reason, 1267 Deoptimization::DeoptAction action) 1268 : CallGenerator(m) 1269 { 1270 _reason = reason; 1271 _action = action; 1272 } 1273 1274 virtual bool is_virtual() const { ShouldNotReachHere(); return false; } 1275 virtual bool is_trap() const { return true; } 1276 1277 virtual JVMState* generate(JVMState* jvms); 1278 }; 1279 1280 1281 CallGenerator* 1282 CallGenerator::for_uncommon_trap(ciMethod* m, 1283 Deoptimization::DeoptReason reason, 1284 Deoptimization::DeoptAction action) { 1285 return new UncommonTrapCallGenerator(m, reason, action); 1286 } 1287 1288 1289 JVMState* UncommonTrapCallGenerator::generate(JVMState* jvms) { 1290 GraphKit kit(jvms); 1291 kit.C->print_inlining_update(this); 1292 // Take the trap with arguments pushed on the stack. (Cf. null_check_receiver). 1293 // Callsite signature can be different from actual method being called (i.e _linkTo* sites). 1294 // Use callsite signature always. 1295 ciMethod* declared_method = kit.method()->get_method_at_bci(kit.bci()); 1296 int nargs = declared_method->arg_size(); 1297 kit.inc_sp(nargs); 1298 assert(nargs <= kit.sp() && kit.sp() <= jvms->stk_size(), "sane sp w/ args pushed"); 1299 if (_reason == Deoptimization::Reason_class_check && 1300 _action == Deoptimization::Action_maybe_recompile) { 1301 // Temp fix for 6529811 1302 // Don't allow uncommon_trap to override our decision to recompile in the event 1303 // of a class cast failure for a monomorphic call as it will never let us convert 1304 // the call to either bi-morphic or megamorphic and can lead to unc-trap loops 1305 bool keep_exact_action = true; 1306 kit.uncommon_trap(_reason, _action, NULL, "monomorphic vcall checkcast", false, keep_exact_action); 1307 } else { 1308 kit.uncommon_trap(_reason, _action); 1309 } 1310 return kit.transfer_exceptions_into_jvms(); 1311 } 1312 1313 // (Note: Moved hook_up_call to GraphKit::set_edges_for_java_call.) 1314 1315 // (Node: Merged hook_up_exits into ParseGenerator::generate.) 1316 1317 #define NODES_OVERHEAD_PER_METHOD (30.0) 1318 #define NODES_PER_BYTECODE (9.5) 1319 1320 void WarmCallInfo::init(JVMState* call_site, ciMethod* call_method, ciCallProfile& profile, float prof_factor) { 1321 int call_count = profile.count(); 1322 int code_size = call_method->code_size(); 1323 1324 // Expected execution count is based on the historical count: 1325 _count = call_count < 0 ? 1 : call_site->method()->scale_count(call_count, prof_factor); 1326 1327 // Expected profit from inlining, in units of simple call-overheads. 1328 _profit = 1.0; 1329 1330 // Expected work performed by the call in units of call-overheads. 1331 // %%% need an empirical curve fit for "work" (time in call) 1332 float bytecodes_per_call = 3; 1333 _work = 1.0 + code_size / bytecodes_per_call; 1334 1335 // Expected size of compilation graph: 1336 // -XX:+PrintParseStatistics once reported: 1337 // Methods seen: 9184 Methods parsed: 9184 Nodes created: 1582391 1338 // Histogram of 144298 parsed bytecodes: 1339 // %%% Need an better predictor for graph size. 1340 _size = NODES_OVERHEAD_PER_METHOD + (NODES_PER_BYTECODE * code_size); 1341 } 1342 1343 // is_cold: Return true if the node should never be inlined. 1344 // This is true if any of the key metrics are extreme. 1345 bool WarmCallInfo::is_cold() const { 1346 if (count() < WarmCallMinCount) return true; 1347 if (profit() < WarmCallMinProfit) return true; 1348 if (work() > WarmCallMaxWork) return true; 1349 if (size() > WarmCallMaxSize) return true; 1350 return false; 1351 } 1352 1353 // is_hot: Return true if the node should be inlined immediately. 1354 // This is true if any of the key metrics are extreme. 1355 bool WarmCallInfo::is_hot() const { 1356 assert(!is_cold(), "eliminate is_cold cases before testing is_hot"); 1357 if (count() >= HotCallCountThreshold) return true; 1358 if (profit() >= HotCallProfitThreshold) return true; 1359 if (work() <= HotCallTrivialWork) return true; 1360 if (size() <= HotCallTrivialSize) return true; 1361 return false; 1362 } 1363 1364 // compute_heat: 1365 float WarmCallInfo::compute_heat() const { 1366 assert(!is_cold(), "compute heat only on warm nodes"); 1367 assert(!is_hot(), "compute heat only on warm nodes"); 1368 int min_size = MAX2(0, (int)HotCallTrivialSize); 1369 int max_size = MIN2(500, (int)WarmCallMaxSize); 1370 float method_size = (size() - min_size) / MAX2(1, max_size - min_size); 1371 float size_factor; 1372 if (method_size < 0.05) size_factor = 4; // 2 sigmas better than avg. 1373 else if (method_size < 0.15) size_factor = 2; // 1 sigma better than avg. 1374 else if (method_size < 0.5) size_factor = 1; // better than avg. 1375 else size_factor = 0.5; // worse than avg. 1376 return (count() * profit() * size_factor); 1377 } 1378 1379 bool WarmCallInfo::warmer_than(WarmCallInfo* that) { 1380 assert(this != that, "compare only different WCIs"); 1381 assert(this->heat() != 0 && that->heat() != 0, "call compute_heat 1st"); 1382 if (this->heat() > that->heat()) return true; 1383 if (this->heat() < that->heat()) return false; 1384 assert(this->heat() == that->heat(), "no NaN heat allowed"); 1385 // Equal heat. Break the tie some other way. 1386 if (!this->call() || !that->call()) return (address)this > (address)that; 1387 return this->call()->_idx > that->call()->_idx; 1388 } 1389 1390 //#define UNINIT_NEXT ((WarmCallInfo*)badAddress) 1391 #define UNINIT_NEXT ((WarmCallInfo*)NULL) 1392 1393 WarmCallInfo* WarmCallInfo::insert_into(WarmCallInfo* head) { 1394 assert(next() == UNINIT_NEXT, "not yet on any list"); 1395 WarmCallInfo* prev_p = NULL; 1396 WarmCallInfo* next_p = head; 1397 while (next_p != NULL && next_p->warmer_than(this)) { 1398 prev_p = next_p; 1399 next_p = prev_p->next(); 1400 } 1401 // Install this between prev_p and next_p. 1402 this->set_next(next_p); 1403 if (prev_p == NULL) 1404 head = this; 1405 else 1406 prev_p->set_next(this); 1407 return head; 1408 } 1409 1410 WarmCallInfo* WarmCallInfo::remove_from(WarmCallInfo* head) { 1411 WarmCallInfo* prev_p = NULL; 1412 WarmCallInfo* next_p = head; 1413 while (next_p != this) { 1414 assert(next_p != NULL, "this must be in the list somewhere"); 1415 prev_p = next_p; 1416 next_p = prev_p->next(); 1417 } 1418 next_p = this->next(); 1419 debug_only(this->set_next(UNINIT_NEXT)); 1420 // Remove this from between prev_p and next_p. 1421 if (prev_p == NULL) 1422 head = next_p; 1423 else 1424 prev_p->set_next(next_p); 1425 return head; 1426 } 1427 1428 WarmCallInfo WarmCallInfo::_always_hot(WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE(), 1429 WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE()); 1430 WarmCallInfo WarmCallInfo::_always_cold(WarmCallInfo::MIN_VALUE(), WarmCallInfo::MIN_VALUE(), 1431 WarmCallInfo::MAX_VALUE(), WarmCallInfo::MAX_VALUE()); 1432 1433 WarmCallInfo* WarmCallInfo::always_hot() { 1434 assert(_always_hot.is_hot(), "must always be hot"); 1435 return &_always_hot; 1436 } 1437 1438 WarmCallInfo* WarmCallInfo::always_cold() { 1439 assert(_always_cold.is_cold(), "must always be cold"); 1440 return &_always_cold; 1441 } 1442 1443 1444 #ifndef PRODUCT 1445 1446 void WarmCallInfo::print() const { 1447 tty->print("%s : C=%6.1f P=%6.1f W=%6.1f S=%6.1f H=%6.1f -> %p", 1448 is_cold() ? "cold" : is_hot() ? "hot " : "warm", 1449 count(), profit(), work(), size(), compute_heat(), next()); 1450 tty->cr(); 1451 if (call() != NULL) call()->dump(); 1452 } 1453 1454 void print_wci(WarmCallInfo* ci) { 1455 ci->print(); 1456 } 1457 1458 void WarmCallInfo::print_all() const { 1459 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) 1460 p->print(); 1461 } 1462 1463 int WarmCallInfo::count_all() const { 1464 int cnt = 0; 1465 for (const WarmCallInfo* p = this; p != NULL; p = p->next()) 1466 cnt++; 1467 return cnt; 1468 } 1469 1470 #endif //PRODUCT