1 // Copyright 2012 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "src/crankshaft/ia32/lithium-ia32.h" 6 7 #include <sstream> 8 9 #if V8_TARGET_ARCH_IA32 10 11 #include "src/crankshaft/hydrogen-osr.h" 12 #include "src/crankshaft/ia32/lithium-codegen-ia32.h" 13 #include "src/crankshaft/lithium-inl.h" 14 15 namespace v8 { 16 namespace internal { 17 18 #define DEFINE_COMPILE(type) \ 19 void L##type::CompileToNative(LCodeGen* generator) { \ 20 generator->Do##type(this); \ 21 } 22 LITHIUM_CONCRETE_INSTRUCTION_LIST(DEFINE_COMPILE) 23 #undef DEFINE_COMPILE 24 25 26 #ifdef DEBUG 27 void LInstruction::VerifyCall() { 28 // Call instructions can use only fixed registers as temporaries and 29 // outputs because all registers are blocked by the calling convention. 30 // Inputs operands must use a fixed register or use-at-start policy or 31 // a non-register policy. 32 DCHECK(Output() == NULL || 33 LUnallocated::cast(Output())->HasFixedPolicy() || 34 !LUnallocated::cast(Output())->HasRegisterPolicy()); 35 for (UseIterator it(this); !it.Done(); it.Advance()) { 36 LUnallocated* operand = LUnallocated::cast(it.Current()); 37 DCHECK(operand->HasFixedPolicy() || 38 operand->IsUsedAtStart()); 39 } 40 for (TempIterator it(this); !it.Done(); it.Advance()) { 41 LUnallocated* operand = LUnallocated::cast(it.Current()); 42 DCHECK(operand->HasFixedPolicy() ||!operand->HasRegisterPolicy()); 43 } 44 } 45 #endif 46 47 48 bool LInstruction::HasDoubleRegisterResult() { 49 return HasResult() && result()->IsDoubleRegister(); 50 } 51 52 53 bool LInstruction::HasDoubleRegisterInput() { 54 for (int i = 0; i < InputCount(); i++) { 55 LOperand* op = InputAt(i); 56 if (op != NULL && op->IsDoubleRegister()) { 57 return true; 58 } 59 } 60 return false; 61 } 62 63 64 void LInstruction::PrintTo(StringStream* stream) { 65 stream->Add("%s ", this->Mnemonic()); 66 67 PrintOutputOperandTo(stream); 68 69 PrintDataTo(stream); 70 71 if (HasEnvironment()) { 72 stream->Add(" "); 73 environment()->PrintTo(stream); 74 } 75 76 if (HasPointerMap()) { 77 stream->Add(" "); 78 pointer_map()->PrintTo(stream); 79 } 80 } 81 82 83 void LInstruction::PrintDataTo(StringStream* stream) { 84 stream->Add("= "); 85 for (int i = 0; i < InputCount(); i++) { 86 if (i > 0) stream->Add(" "); 87 if (InputAt(i) == NULL) { 88 stream->Add("NULL"); 89 } else { 90 InputAt(i)->PrintTo(stream); 91 } 92 } 93 } 94 95 96 void LInstruction::PrintOutputOperandTo(StringStream* stream) { 97 if (HasResult()) result()->PrintTo(stream); 98 } 99 100 101 void LLabel::PrintDataTo(StringStream* stream) { 102 LGap::PrintDataTo(stream); 103 LLabel* rep = replacement(); 104 if (rep != NULL) { 105 stream->Add(" Dead block replaced with B%d", rep->block_id()); 106 } 107 } 108 109 110 bool LGap::IsRedundant() const { 111 for (int i = 0; i < 4; i++) { 112 if (parallel_moves_[i] != NULL && !parallel_moves_[i]->IsRedundant()) { 113 return false; 114 } 115 } 116 117 return true; 118 } 119 120 121 void LGap::PrintDataTo(StringStream* stream) { 122 for (int i = 0; i < 4; i++) { 123 stream->Add("("); 124 if (parallel_moves_[i] != NULL) { 125 parallel_moves_[i]->PrintDataTo(stream); 126 } 127 stream->Add(") "); 128 } 129 } 130 131 132 const char* LArithmeticD::Mnemonic() const { 133 switch (op()) { 134 case Token::ADD: return "add-d"; 135 case Token::SUB: return "sub-d"; 136 case Token::MUL: return "mul-d"; 137 case Token::DIV: return "div-d"; 138 case Token::MOD: return "mod-d"; 139 default: 140 UNREACHABLE(); 141 return NULL; 142 } 143 } 144 145 146 const char* LArithmeticT::Mnemonic() const { 147 switch (op()) { 148 case Token::ADD: return "add-t"; 149 case Token::SUB: return "sub-t"; 150 case Token::MUL: return "mul-t"; 151 case Token::MOD: return "mod-t"; 152 case Token::DIV: return "div-t"; 153 case Token::BIT_AND: return "bit-and-t"; 154 case Token::BIT_OR: return "bit-or-t"; 155 case Token::BIT_XOR: return "bit-xor-t"; 156 case Token::ROR: return "ror-t"; 157 case Token::SHL: return "sal-t"; 158 case Token::SAR: return "sar-t"; 159 case Token::SHR: return "shr-t"; 160 default: 161 UNREACHABLE(); 162 return NULL; 163 } 164 } 165 166 167 bool LGoto::HasInterestingComment(LCodeGen* gen) const { 168 return !gen->IsNextEmittedBlock(block_id()); 169 } 170 171 172 void LGoto::PrintDataTo(StringStream* stream) { 173 stream->Add("B%d", block_id()); 174 } 175 176 177 void LBranch::PrintDataTo(StringStream* stream) { 178 stream->Add("B%d | B%d on ", true_block_id(), false_block_id()); 179 value()->PrintTo(stream); 180 } 181 182 183 void LCompareNumericAndBranch::PrintDataTo(StringStream* stream) { 184 stream->Add("if "); 185 left()->PrintTo(stream); 186 stream->Add(" %s ", Token::String(op())); 187 right()->PrintTo(stream); 188 stream->Add(" then B%d else B%d", true_block_id(), false_block_id()); 189 } 190 191 192 void LIsStringAndBranch::PrintDataTo(StringStream* stream) { 193 stream->Add("if is_string("); 194 value()->PrintTo(stream); 195 stream->Add(") then B%d else B%d", true_block_id(), false_block_id()); 196 } 197 198 199 void LIsSmiAndBranch::PrintDataTo(StringStream* stream) { 200 stream->Add("if is_smi("); 201 value()->PrintTo(stream); 202 stream->Add(") then B%d else B%d", true_block_id(), false_block_id()); 203 } 204 205 206 void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) { 207 stream->Add("if is_undetectable("); 208 value()->PrintTo(stream); 209 stream->Add(") then B%d else B%d", true_block_id(), false_block_id()); 210 } 211 212 213 void LStringCompareAndBranch::PrintDataTo(StringStream* stream) { 214 stream->Add("if string_compare("); 215 left()->PrintTo(stream); 216 right()->PrintTo(stream); 217 stream->Add(") then B%d else B%d", true_block_id(), false_block_id()); 218 } 219 220 221 void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) { 222 stream->Add("if has_instance_type("); 223 value()->PrintTo(stream); 224 stream->Add(") then B%d else B%d", true_block_id(), false_block_id()); 225 } 226 227 228 void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) { 229 stream->Add("if has_cached_array_index("); 230 value()->PrintTo(stream); 231 stream->Add(") then B%d else B%d", true_block_id(), false_block_id()); 232 } 233 234 235 void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) { 236 stream->Add("if class_of_test("); 237 value()->PrintTo(stream); 238 stream->Add(", \"%o\") then B%d else B%d", 239 *hydrogen()->class_name(), 240 true_block_id(), 241 false_block_id()); 242 } 243 244 245 void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) { 246 stream->Add("if typeof "); 247 value()->PrintTo(stream); 248 stream->Add(" == \"%s\" then B%d else B%d", 249 hydrogen()->type_literal()->ToCString().get(), 250 true_block_id(), false_block_id()); 251 } 252 253 254 void LStoreCodeEntry::PrintDataTo(StringStream* stream) { 255 stream->Add(" = "); 256 function()->PrintTo(stream); 257 stream->Add(".code_entry = "); 258 code_object()->PrintTo(stream); 259 } 260 261 262 void LInnerAllocatedObject::PrintDataTo(StringStream* stream) { 263 stream->Add(" = "); 264 base_object()->PrintTo(stream); 265 stream->Add(" + "); 266 offset()->PrintTo(stream); 267 } 268 269 270 void LCallWithDescriptor::PrintDataTo(StringStream* stream) { 271 for (int i = 0; i < InputCount(); i++) { 272 InputAt(i)->PrintTo(stream); 273 stream->Add(" "); 274 } 275 stream->Add("#%d / ", arity()); 276 } 277 278 279 void LLoadContextSlot::PrintDataTo(StringStream* stream) { 280 context()->PrintTo(stream); 281 stream->Add("[%d]", slot_index()); 282 } 283 284 285 void LStoreContextSlot::PrintDataTo(StringStream* stream) { 286 context()->PrintTo(stream); 287 stream->Add("[%d] <- ", slot_index()); 288 value()->PrintTo(stream); 289 } 290 291 292 void LInvokeFunction::PrintDataTo(StringStream* stream) { 293 stream->Add("= "); 294 context()->PrintTo(stream); 295 stream->Add(" "); 296 function()->PrintTo(stream); 297 stream->Add(" #%d / ", arity()); 298 } 299 300 301 void LCallNewArray::PrintDataTo(StringStream* stream) { 302 stream->Add("= "); 303 context()->PrintTo(stream); 304 stream->Add(" "); 305 constructor()->PrintTo(stream); 306 stream->Add(" #%d / ", arity()); 307 ElementsKind kind = hydrogen()->elements_kind(); 308 stream->Add(" (%s) ", ElementsKindToString(kind)); 309 } 310 311 312 void LAccessArgumentsAt::PrintDataTo(StringStream* stream) { 313 arguments()->PrintTo(stream); 314 315 stream->Add(" length "); 316 length()->PrintTo(stream); 317 318 stream->Add(" index "); 319 index()->PrintTo(stream); 320 } 321 322 323 int LPlatformChunk::GetNextSpillIndex(RegisterKind kind) { 324 // Skip a slot if for a double-width slot. 325 if (kind == DOUBLE_REGISTERS) { 326 current_frame_slots_++; 327 current_frame_slots_ |= 1; 328 num_double_slots_++; 329 } 330 return current_frame_slots_++; 331 } 332 333 334 LOperand* LPlatformChunk::GetNextSpillSlot(RegisterKind kind) { 335 int index = GetNextSpillIndex(kind); 336 if (kind == DOUBLE_REGISTERS) { 337 return LDoubleStackSlot::Create(index, zone()); 338 } else { 339 DCHECK(kind == GENERAL_REGISTERS); 340 return LStackSlot::Create(index, zone()); 341 } 342 } 343 344 345 void LStoreNamedField::PrintDataTo(StringStream* stream) { 346 object()->PrintTo(stream); 347 std::ostringstream os; 348 os << hydrogen()->access() << " <- "; 349 stream->Add(os.str().c_str()); 350 value()->PrintTo(stream); 351 } 352 353 354 void LStoreNamedGeneric::PrintDataTo(StringStream* stream) { 355 object()->PrintTo(stream); 356 stream->Add("."); 357 stream->Add(String::cast(*name())->ToCString().get()); 358 stream->Add(" <- "); 359 value()->PrintTo(stream); 360 } 361 362 363 void LLoadKeyed::PrintDataTo(StringStream* stream) { 364 elements()->PrintTo(stream); 365 stream->Add("["); 366 key()->PrintTo(stream); 367 if (hydrogen()->IsDehoisted()) { 368 stream->Add(" + %d]", base_offset()); 369 } else { 370 stream->Add("]"); 371 } 372 } 373 374 375 void LStoreKeyed::PrintDataTo(StringStream* stream) { 376 elements()->PrintTo(stream); 377 stream->Add("["); 378 key()->PrintTo(stream); 379 if (hydrogen()->IsDehoisted()) { 380 stream->Add(" + %d] <-", base_offset()); 381 } else { 382 stream->Add("] <- "); 383 } 384 385 if (value() == NULL) { 386 DCHECK(hydrogen()->IsConstantHoleStore() && 387 hydrogen()->value()->representation().IsDouble()); 388 stream->Add("<the hole(nan)>"); 389 } else { 390 value()->PrintTo(stream); 391 } 392 } 393 394 395 void LStoreKeyedGeneric::PrintDataTo(StringStream* stream) { 396 object()->PrintTo(stream); 397 stream->Add("["); 398 key()->PrintTo(stream); 399 stream->Add("] <- "); 400 value()->PrintTo(stream); 401 } 402 403 404 void LTransitionElementsKind::PrintDataTo(StringStream* stream) { 405 object()->PrintTo(stream); 406 stream->Add(" %p -> %p", *original_map(), *transitioned_map()); 407 } 408 409 410 LPlatformChunk* LChunkBuilder::Build() { 411 DCHECK(is_unused()); 412 chunk_ = new(zone()) LPlatformChunk(info(), graph()); 413 LPhase phase("L_Building chunk", chunk_); 414 status_ = BUILDING; 415 416 // If compiling for OSR, reserve space for the unoptimized frame, 417 // which will be subsumed into this frame. 418 if (graph()->has_osr()) { 419 for (int i = graph()->osr()->UnoptimizedFrameSlots(); i > 0; i--) { 420 chunk_->GetNextSpillIndex(GENERAL_REGISTERS); 421 } 422 } 423 424 const ZoneList<HBasicBlock*>* blocks = graph()->blocks(); 425 for (int i = 0; i < blocks->length(); i++) { 426 HBasicBlock* next = NULL; 427 if (i < blocks->length() - 1) next = blocks->at(i + 1); 428 DoBasicBlock(blocks->at(i), next); 429 if (is_aborted()) return NULL; 430 } 431 status_ = DONE; 432 return chunk_; 433 } 434 435 436 LUnallocated* LChunkBuilder::ToUnallocated(Register reg) { 437 return new (zone()) LUnallocated(LUnallocated::FIXED_REGISTER, reg.code()); 438 } 439 440 441 LUnallocated* LChunkBuilder::ToUnallocated(XMMRegister reg) { 442 return new (zone()) 443 LUnallocated(LUnallocated::FIXED_DOUBLE_REGISTER, reg.code()); 444 } 445 446 447 LOperand* LChunkBuilder::UseFixed(HValue* value, Register fixed_register) { 448 return Use(value, ToUnallocated(fixed_register)); 449 } 450 451 452 LOperand* LChunkBuilder::UseFixedDouble(HValue* value, XMMRegister reg) { 453 return Use(value, ToUnallocated(reg)); 454 } 455 456 457 LOperand* LChunkBuilder::UseRegister(HValue* value) { 458 return Use(value, new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER)); 459 } 460 461 462 LOperand* LChunkBuilder::UseRegisterAtStart(HValue* value) { 463 return Use(value, 464 new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER, 465 LUnallocated::USED_AT_START)); 466 } 467 468 469 LOperand* LChunkBuilder::UseTempRegister(HValue* value) { 470 return Use(value, new(zone()) LUnallocated(LUnallocated::WRITABLE_REGISTER)); 471 } 472 473 474 LOperand* LChunkBuilder::Use(HValue* value) { 475 return Use(value, new(zone()) LUnallocated(LUnallocated::NONE)); 476 } 477 478 479 LOperand* LChunkBuilder::UseAtStart(HValue* value) { 480 return Use(value, new(zone()) LUnallocated(LUnallocated::NONE, 481 LUnallocated::USED_AT_START)); 482 } 483 484 485 static inline bool CanBeImmediateConstant(HValue* value) { 486 return value->IsConstant() && HConstant::cast(value)->NotInNewSpace(); 487 } 488 489 490 LOperand* LChunkBuilder::UseOrConstant(HValue* value) { 491 return CanBeImmediateConstant(value) 492 ? chunk_->DefineConstantOperand(HConstant::cast(value)) 493 : Use(value); 494 } 495 496 497 LOperand* LChunkBuilder::UseOrConstantAtStart(HValue* value) { 498 return CanBeImmediateConstant(value) 499 ? chunk_->DefineConstantOperand(HConstant::cast(value)) 500 : UseAtStart(value); 501 } 502 503 504 LOperand* LChunkBuilder::UseFixedOrConstant(HValue* value, 505 Register fixed_register) { 506 return CanBeImmediateConstant(value) 507 ? chunk_->DefineConstantOperand(HConstant::cast(value)) 508 : UseFixed(value, fixed_register); 509 } 510 511 512 LOperand* LChunkBuilder::UseRegisterOrConstant(HValue* value) { 513 return CanBeImmediateConstant(value) 514 ? chunk_->DefineConstantOperand(HConstant::cast(value)) 515 : UseRegister(value); 516 } 517 518 519 LOperand* LChunkBuilder::UseRegisterOrConstantAtStart(HValue* value) { 520 return CanBeImmediateConstant(value) 521 ? chunk_->DefineConstantOperand(HConstant::cast(value)) 522 : UseRegisterAtStart(value); 523 } 524 525 526 LOperand* LChunkBuilder::UseConstant(HValue* value) { 527 return chunk_->DefineConstantOperand(HConstant::cast(value)); 528 } 529 530 531 LOperand* LChunkBuilder::UseAny(HValue* value) { 532 return value->IsConstant() 533 ? chunk_->DefineConstantOperand(HConstant::cast(value)) 534 : Use(value, new(zone()) LUnallocated(LUnallocated::ANY)); 535 } 536 537 538 LOperand* LChunkBuilder::Use(HValue* value, LUnallocated* operand) { 539 if (value->EmitAtUses()) { 540 HInstruction* instr = HInstruction::cast(value); 541 VisitInstruction(instr); 542 } 543 operand->set_virtual_register(value->id()); 544 return operand; 545 } 546 547 548 LInstruction* LChunkBuilder::Define(LTemplateResultInstruction<1>* instr, 549 LUnallocated* result) { 550 result->set_virtual_register(current_instruction_->id()); 551 instr->set_result(result); 552 return instr; 553 } 554 555 556 LInstruction* LChunkBuilder::DefineAsRegister( 557 LTemplateResultInstruction<1>* instr) { 558 return Define(instr, 559 new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER)); 560 } 561 562 563 LInstruction* LChunkBuilder::DefineAsSpilled( 564 LTemplateResultInstruction<1>* instr, 565 int index) { 566 return Define(instr, 567 new(zone()) LUnallocated(LUnallocated::FIXED_SLOT, index)); 568 } 569 570 571 LInstruction* LChunkBuilder::DefineSameAsFirst( 572 LTemplateResultInstruction<1>* instr) { 573 return Define(instr, 574 new(zone()) LUnallocated(LUnallocated::SAME_AS_FIRST_INPUT)); 575 } 576 577 578 LInstruction* LChunkBuilder::DefineFixed(LTemplateResultInstruction<1>* instr, 579 Register reg) { 580 return Define(instr, ToUnallocated(reg)); 581 } 582 583 584 LInstruction* LChunkBuilder::DefineFixedDouble( 585 LTemplateResultInstruction<1>* instr, 586 XMMRegister reg) { 587 return Define(instr, ToUnallocated(reg)); 588 } 589 590 591 LInstruction* LChunkBuilder::AssignEnvironment(LInstruction* instr) { 592 HEnvironment* hydrogen_env = current_block_->last_environment(); 593 return LChunkBuilderBase::AssignEnvironment(instr, hydrogen_env); 594 } 595 596 597 LInstruction* LChunkBuilder::MarkAsCall(LInstruction* instr, 598 HInstruction* hinstr, 599 CanDeoptimize can_deoptimize) { 600 info()->MarkAsNonDeferredCalling(); 601 602 #ifdef DEBUG 603 instr->VerifyCall(); 604 #endif 605 instr->MarkAsCall(); 606 instr = AssignPointerMap(instr); 607 608 // If instruction does not have side-effects lazy deoptimization 609 // after the call will try to deoptimize to the point before the call. 610 // Thus we still need to attach environment to this call even if 611 // call sequence can not deoptimize eagerly. 612 bool needs_environment = 613 (can_deoptimize == CAN_DEOPTIMIZE_EAGERLY) || 614 !hinstr->HasObservableSideEffects(); 615 if (needs_environment && !instr->HasEnvironment()) { 616 instr = AssignEnvironment(instr); 617 // We can't really figure out if the environment is needed or not. 618 instr->environment()->set_has_been_used(); 619 } 620 621 return instr; 622 } 623 624 625 LInstruction* LChunkBuilder::AssignPointerMap(LInstruction* instr) { 626 DCHECK(!instr->HasPointerMap()); 627 instr->set_pointer_map(new(zone()) LPointerMap(zone())); 628 return instr; 629 } 630 631 632 LUnallocated* LChunkBuilder::TempRegister() { 633 LUnallocated* operand = 634 new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER); 635 int vreg = allocator_->GetVirtualRegister(); 636 if (!allocator_->AllocationOk()) { 637 Abort(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister); 638 vreg = 0; 639 } 640 operand->set_virtual_register(vreg); 641 return operand; 642 } 643 644 645 LOperand* LChunkBuilder::FixedTemp(Register reg) { 646 LUnallocated* operand = ToUnallocated(reg); 647 DCHECK(operand->HasFixedPolicy()); 648 return operand; 649 } 650 651 652 LOperand* LChunkBuilder::FixedTemp(XMMRegister reg) { 653 LUnallocated* operand = ToUnallocated(reg); 654 DCHECK(operand->HasFixedPolicy()); 655 return operand; 656 } 657 658 659 LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) { 660 return new(zone()) LLabel(instr->block()); 661 } 662 663 664 LInstruction* LChunkBuilder::DoDummyUse(HDummyUse* instr) { 665 return DefineAsRegister(new(zone()) LDummyUse(UseAny(instr->value()))); 666 } 667 668 669 LInstruction* LChunkBuilder::DoEnvironmentMarker(HEnvironmentMarker* instr) { 670 UNREACHABLE(); 671 return NULL; 672 } 673 674 675 LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) { 676 return AssignEnvironment(new(zone()) LDeoptimize); 677 } 678 679 680 LInstruction* LChunkBuilder::DoShift(Token::Value op, 681 HBitwiseBinaryOperation* instr) { 682 if (instr->representation().IsSmiOrInteger32()) { 683 DCHECK(instr->left()->representation().Equals(instr->representation())); 684 DCHECK(instr->right()->representation().Equals(instr->representation())); 685 LOperand* left = UseRegisterAtStart(instr->left()); 686 687 HValue* right_value = instr->right(); 688 LOperand* right = NULL; 689 int constant_value = 0; 690 bool does_deopt = false; 691 if (right_value->IsConstant()) { 692 HConstant* constant = HConstant::cast(right_value); 693 right = chunk_->DefineConstantOperand(constant); 694 constant_value = constant->Integer32Value() & 0x1f; 695 // Left shifts can deoptimize if we shift by > 0 and the result cannot be 696 // truncated to smi. 697 if (instr->representation().IsSmi() && constant_value > 0) { 698 does_deopt = !instr->CheckUsesForFlag(HValue::kTruncatingToSmi); 699 } 700 } else { 701 right = UseFixed(right_value, ecx); 702 } 703 704 // Shift operations can only deoptimize if we do a logical shift by 0 and 705 // the result cannot be truncated to int32. 706 if (op == Token::SHR && constant_value == 0) { 707 does_deopt = !instr->CheckFlag(HInstruction::kUint32); 708 } 709 710 LInstruction* result = 711 DefineSameAsFirst(new(zone()) LShiftI(op, left, right, does_deopt)); 712 return does_deopt ? AssignEnvironment(result) : result; 713 } else { 714 return DoArithmeticT(op, instr); 715 } 716 } 717 718 719 LInstruction* LChunkBuilder::DoArithmeticD(Token::Value op, 720 HArithmeticBinaryOperation* instr) { 721 DCHECK(instr->representation().IsDouble()); 722 DCHECK(instr->left()->representation().IsDouble()); 723 DCHECK(instr->right()->representation().IsDouble()); 724 if (op == Token::MOD) { 725 LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand()); 726 LOperand* right = UseRegisterAtStart(instr->BetterRightOperand()); 727 LArithmeticD* result = new(zone()) LArithmeticD(op, left, right); 728 return MarkAsCall(DefineSameAsFirst(result), instr); 729 } else { 730 LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand()); 731 LOperand* right = UseRegisterAtStart(instr->BetterRightOperand()); 732 LArithmeticD* result = new(zone()) LArithmeticD(op, left, right); 733 return CpuFeatures::IsSupported(AVX) ? DefineAsRegister(result) 734 : DefineSameAsFirst(result); 735 } 736 } 737 738 739 LInstruction* LChunkBuilder::DoArithmeticT(Token::Value op, 740 HBinaryOperation* instr) { 741 HValue* left = instr->left(); 742 HValue* right = instr->right(); 743 DCHECK(left->representation().IsTagged()); 744 DCHECK(right->representation().IsTagged()); 745 LOperand* context = UseFixed(instr->context(), esi); 746 LOperand* left_operand = UseFixed(left, edx); 747 LOperand* right_operand = UseFixed(right, eax); 748 LArithmeticT* result = 749 new(zone()) LArithmeticT(op, context, left_operand, right_operand); 750 return MarkAsCall(DefineFixed(result, eax), instr); 751 } 752 753 754 void LChunkBuilder::DoBasicBlock(HBasicBlock* block, HBasicBlock* next_block) { 755 DCHECK(is_building()); 756 current_block_ = block; 757 next_block_ = next_block; 758 if (block->IsStartBlock()) { 759 block->UpdateEnvironment(graph_->start_environment()); 760 argument_count_ = 0; 761 } else if (block->predecessors()->length() == 1) { 762 // We have a single predecessor => copy environment and outgoing 763 // argument count from the predecessor. 764 DCHECK(block->phis()->length() == 0); 765 HBasicBlock* pred = block->predecessors()->at(0); 766 HEnvironment* last_environment = pred->last_environment(); 767 DCHECK(last_environment != NULL); 768 // Only copy the environment, if it is later used again. 769 if (pred->end()->SecondSuccessor() == NULL) { 770 DCHECK(pred->end()->FirstSuccessor() == block); 771 } else { 772 if (pred->end()->FirstSuccessor()->block_id() > block->block_id() || 773 pred->end()->SecondSuccessor()->block_id() > block->block_id()) { 774 last_environment = last_environment->Copy(); 775 } 776 } 777 block->UpdateEnvironment(last_environment); 778 DCHECK(pred->argument_count() >= 0); 779 argument_count_ = pred->argument_count(); 780 } else { 781 // We are at a state join => process phis. 782 HBasicBlock* pred = block->predecessors()->at(0); 783 // No need to copy the environment, it cannot be used later. 784 HEnvironment* last_environment = pred->last_environment(); 785 for (int i = 0; i < block->phis()->length(); ++i) { 786 HPhi* phi = block->phis()->at(i); 787 if (phi->HasMergedIndex()) { 788 last_environment->SetValueAt(phi->merged_index(), phi); 789 } 790 } 791 for (int i = 0; i < block->deleted_phis()->length(); ++i) { 792 if (block->deleted_phis()->at(i) < last_environment->length()) { 793 last_environment->SetValueAt(block->deleted_phis()->at(i), 794 graph_->GetConstantUndefined()); 795 } 796 } 797 block->UpdateEnvironment(last_environment); 798 // Pick up the outgoing argument count of one of the predecessors. 799 argument_count_ = pred->argument_count(); 800 } 801 HInstruction* current = block->first(); 802 int start = chunk_->instructions()->length(); 803 while (current != NULL && !is_aborted()) { 804 // Code for constants in registers is generated lazily. 805 if (!current->EmitAtUses()) { 806 VisitInstruction(current); 807 } 808 current = current->next(); 809 } 810 int end = chunk_->instructions()->length() - 1; 811 if (end >= start) { 812 block->set_first_instruction_index(start); 813 block->set_last_instruction_index(end); 814 } 815 block->set_argument_count(argument_count_); 816 next_block_ = NULL; 817 current_block_ = NULL; 818 } 819 820 821 void LChunkBuilder::VisitInstruction(HInstruction* current) { 822 HInstruction* old_current = current_instruction_; 823 current_instruction_ = current; 824 825 LInstruction* instr = NULL; 826 if (current->CanReplaceWithDummyUses()) { 827 if (current->OperandCount() == 0) { 828 instr = DefineAsRegister(new(zone()) LDummy()); 829 } else { 830 DCHECK(!current->OperandAt(0)->IsControlInstruction()); 831 instr = DefineAsRegister(new(zone()) 832 LDummyUse(UseAny(current->OperandAt(0)))); 833 } 834 for (int i = 1; i < current->OperandCount(); ++i) { 835 if (current->OperandAt(i)->IsControlInstruction()) continue; 836 LInstruction* dummy = 837 new(zone()) LDummyUse(UseAny(current->OperandAt(i))); 838 dummy->set_hydrogen_value(current); 839 chunk_->AddInstruction(dummy, current_block_); 840 } 841 } else { 842 HBasicBlock* successor; 843 if (current->IsControlInstruction() && 844 HControlInstruction::cast(current)->KnownSuccessorBlock(&successor) && 845 successor != NULL) { 846 instr = new(zone()) LGoto(successor); 847 } else { 848 instr = current->CompileToLithium(this); 849 } 850 } 851 852 argument_count_ += current->argument_delta(); 853 DCHECK(argument_count_ >= 0); 854 855 if (instr != NULL) { 856 AddInstruction(instr, current); 857 } 858 859 current_instruction_ = old_current; 860 } 861 862 863 void LChunkBuilder::AddInstruction(LInstruction* instr, 864 HInstruction* hydrogen_val) { 865 // Associate the hydrogen instruction first, since we may need it for 866 // the ClobbersRegisters() or ClobbersDoubleRegisters() calls below. 867 instr->set_hydrogen_value(hydrogen_val); 868 869 #if DEBUG 870 // Make sure that the lithium instruction has either no fixed register 871 // constraints in temps or the result OR no uses that are only used at 872 // start. If this invariant doesn't hold, the register allocator can decide 873 // to insert a split of a range immediately before the instruction due to an 874 // already allocated register needing to be used for the instruction's fixed 875 // register constraint. In this case, The register allocator won't see an 876 // interference between the split child and the use-at-start (it would if 877 // the it was just a plain use), so it is free to move the split child into 878 // the same register that is used for the use-at-start. 879 // See https://code.google.com/p/chromium/issues/detail?id=201590 880 if (!(instr->ClobbersRegisters() && 881 instr->ClobbersDoubleRegisters(isolate()))) { 882 int fixed = 0; 883 int used_at_start = 0; 884 for (UseIterator it(instr); !it.Done(); it.Advance()) { 885 LUnallocated* operand = LUnallocated::cast(it.Current()); 886 if (operand->IsUsedAtStart()) ++used_at_start; 887 } 888 if (instr->Output() != NULL) { 889 if (LUnallocated::cast(instr->Output())->HasFixedPolicy()) ++fixed; 890 } 891 for (TempIterator it(instr); !it.Done(); it.Advance()) { 892 LUnallocated* operand = LUnallocated::cast(it.Current()); 893 if (operand->HasFixedPolicy()) ++fixed; 894 } 895 DCHECK(fixed == 0 || used_at_start == 0); 896 } 897 #endif 898 899 if (FLAG_stress_pointer_maps && !instr->HasPointerMap()) { 900 instr = AssignPointerMap(instr); 901 } 902 if (FLAG_stress_environments && !instr->HasEnvironment()) { 903 instr = AssignEnvironment(instr); 904 } 905 chunk_->AddInstruction(instr, current_block_); 906 907 CreateLazyBailoutForCall(current_block_, instr, hydrogen_val); 908 } 909 910 911 LInstruction* LChunkBuilder::DoPrologue(HPrologue* instr) { 912 LInstruction* result = new (zone()) LPrologue(); 913 if (info_->scope()->num_heap_slots() > 0) { 914 result = MarkAsCall(result, instr); 915 } 916 return result; 917 } 918 919 920 LInstruction* LChunkBuilder::DoGoto(HGoto* instr) { 921 return new(zone()) LGoto(instr->FirstSuccessor()); 922 } 923 924 925 LInstruction* LChunkBuilder::DoBranch(HBranch* instr) { 926 HValue* value = instr->value(); 927 Representation r = value->representation(); 928 HType type = value->type(); 929 ToBooleanICStub::Types expected = instr->expected_input_types(); 930 if (expected.IsEmpty()) expected = ToBooleanICStub::Types::Generic(); 931 932 bool easy_case = !r.IsTagged() || type.IsBoolean() || type.IsSmi() || 933 type.IsJSArray() || type.IsHeapNumber() || type.IsString(); 934 LOperand* temp = !easy_case && expected.NeedsMap() ? TempRegister() : NULL; 935 LInstruction* branch = new(zone()) LBranch(UseRegister(value), temp); 936 if (!easy_case && 937 ((!expected.Contains(ToBooleanICStub::SMI) && expected.NeedsMap()) || 938 !expected.IsGeneric())) { 939 branch = AssignEnvironment(branch); 940 } 941 return branch; 942 } 943 944 945 LInstruction* LChunkBuilder::DoDebugBreak(HDebugBreak* instr) { 946 return new(zone()) LDebugBreak(); 947 } 948 949 950 LInstruction* LChunkBuilder::DoCompareMap(HCompareMap* instr) { 951 DCHECK(instr->value()->representation().IsTagged()); 952 LOperand* value = UseRegisterAtStart(instr->value()); 953 return new(zone()) LCmpMapAndBranch(value); 954 } 955 956 957 LInstruction* LChunkBuilder::DoArgumentsLength(HArgumentsLength* length) { 958 info()->MarkAsRequiresFrame(); 959 return DefineAsRegister(new(zone()) LArgumentsLength(Use(length->value()))); 960 } 961 962 963 LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* elems) { 964 info()->MarkAsRequiresFrame(); 965 return DefineAsRegister(new(zone()) LArgumentsElements); 966 } 967 968 969 LInstruction* LChunkBuilder::DoHasInPrototypeChainAndBranch( 970 HHasInPrototypeChainAndBranch* instr) { 971 LOperand* object = UseRegister(instr->object()); 972 LOperand* prototype = UseRegister(instr->prototype()); 973 LOperand* temp = TempRegister(); 974 LHasInPrototypeChainAndBranch* result = 975 new (zone()) LHasInPrototypeChainAndBranch(object, prototype, temp); 976 return AssignEnvironment(result); 977 } 978 979 980 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) { 981 LOperand* receiver = UseRegister(instr->receiver()); 982 LOperand* function = UseRegister(instr->function()); 983 LOperand* temp = TempRegister(); 984 LWrapReceiver* result = 985 new(zone()) LWrapReceiver(receiver, function, temp); 986 return AssignEnvironment(DefineSameAsFirst(result)); 987 } 988 989 990 LInstruction* LChunkBuilder::DoApplyArguments(HApplyArguments* instr) { 991 LOperand* function = UseFixed(instr->function(), edi); 992 LOperand* receiver = UseFixed(instr->receiver(), eax); 993 LOperand* length = UseFixed(instr->length(), ebx); 994 LOperand* elements = UseFixed(instr->elements(), ecx); 995 LApplyArguments* result = new(zone()) LApplyArguments(function, 996 receiver, 997 length, 998 elements); 999 return MarkAsCall(DefineFixed(result, eax), instr, CAN_DEOPTIMIZE_EAGERLY); 1000 } 1001 1002 1003 LInstruction* LChunkBuilder::DoPushArguments(HPushArguments* instr) { 1004 int argc = instr->OperandCount(); 1005 for (int i = 0; i < argc; ++i) { 1006 LOperand* argument = UseAny(instr->argument(i)); 1007 AddInstruction(new(zone()) LPushArgument(argument), instr); 1008 } 1009 return NULL; 1010 } 1011 1012 1013 LInstruction* LChunkBuilder::DoStoreCodeEntry( 1014 HStoreCodeEntry* store_code_entry) { 1015 LOperand* function = UseRegister(store_code_entry->function()); 1016 LOperand* code_object = UseTempRegister(store_code_entry->code_object()); 1017 return new(zone()) LStoreCodeEntry(function, code_object); 1018 } 1019 1020 1021 LInstruction* LChunkBuilder::DoInnerAllocatedObject( 1022 HInnerAllocatedObject* instr) { 1023 LOperand* base_object = UseRegisterAtStart(instr->base_object()); 1024 LOperand* offset = UseRegisterOrConstantAtStart(instr->offset()); 1025 return DefineAsRegister( 1026 new(zone()) LInnerAllocatedObject(base_object, offset)); 1027 } 1028 1029 1030 LInstruction* LChunkBuilder::DoThisFunction(HThisFunction* instr) { 1031 return instr->HasNoUses() 1032 ? NULL 1033 : DefineAsRegister(new(zone()) LThisFunction); 1034 } 1035 1036 1037 LInstruction* LChunkBuilder::DoContext(HContext* instr) { 1038 if (instr->HasNoUses()) return NULL; 1039 1040 if (info()->IsStub()) { 1041 return DefineFixed(new(zone()) LContext, esi); 1042 } 1043 1044 return DefineAsRegister(new(zone()) LContext); 1045 } 1046 1047 1048 LInstruction* LChunkBuilder::DoDeclareGlobals(HDeclareGlobals* instr) { 1049 LOperand* context = UseFixed(instr->context(), esi); 1050 return MarkAsCall(new(zone()) LDeclareGlobals(context), instr); 1051 } 1052 1053 1054 LInstruction* LChunkBuilder::DoCallWithDescriptor( 1055 HCallWithDescriptor* instr) { 1056 CallInterfaceDescriptor descriptor = instr->descriptor(); 1057 LOperand* target = UseRegisterOrConstantAtStart(instr->target()); 1058 ZoneList<LOperand*> ops(instr->OperandCount(), zone()); 1059 // Target 1060 ops.Add(target, zone()); 1061 // Context 1062 LOperand* op = UseFixed(instr->OperandAt(1), esi); 1063 ops.Add(op, zone()); 1064 // Other register parameters 1065 for (int i = LCallWithDescriptor::kImplicitRegisterParameterCount; 1066 i < instr->OperandCount(); i++) { 1067 op = 1068 UseFixed(instr->OperandAt(i), 1069 descriptor.GetRegisterParameter( 1070 i - LCallWithDescriptor::kImplicitRegisterParameterCount)); 1071 ops.Add(op, zone()); 1072 } 1073 1074 LCallWithDescriptor* result = new(zone()) LCallWithDescriptor( 1075 descriptor, ops, zone()); 1076 if (instr->syntactic_tail_call_mode() == TailCallMode::kAllow) { 1077 result->MarkAsSyntacticTailCall(); 1078 } 1079 return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY); 1080 } 1081 1082 1083 LInstruction* LChunkBuilder::DoInvokeFunction(HInvokeFunction* instr) { 1084 LOperand* context = UseFixed(instr->context(), esi); 1085 LOperand* function = UseFixed(instr->function(), edi); 1086 LInvokeFunction* result = new(zone()) LInvokeFunction(context, function); 1087 if (instr->syntactic_tail_call_mode() == TailCallMode::kAllow) { 1088 result->MarkAsSyntacticTailCall(); 1089 } 1090 return MarkAsCall(DefineFixed(result, eax), instr, CANNOT_DEOPTIMIZE_EAGERLY); 1091 } 1092 1093 1094 LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) { 1095 switch (instr->op()) { 1096 case kMathCos: 1097 return DoMathCos(instr); 1098 case kMathFloor: 1099 return DoMathFloor(instr); 1100 case kMathRound: 1101 return DoMathRound(instr); 1102 case kMathFround: 1103 return DoMathFround(instr); 1104 case kMathAbs: 1105 return DoMathAbs(instr); 1106 case kMathLog: 1107 return DoMathLog(instr); 1108 case kMathExp: 1109 return DoMathExp(instr); 1110 case kMathSqrt: 1111 return DoMathSqrt(instr); 1112 case kMathPowHalf: 1113 return DoMathPowHalf(instr); 1114 case kMathClz32: 1115 return DoMathClz32(instr); 1116 case kMathSin: 1117 return DoMathSin(instr); 1118 default: 1119 UNREACHABLE(); 1120 return NULL; 1121 } 1122 } 1123 1124 LInstruction* LChunkBuilder::DoMathFloor(HUnaryMathOperation* instr) { 1125 DCHECK(instr->value()->representation().IsDouble()); 1126 LOperand* input = UseRegisterAtStart(instr->value()); 1127 if (instr->representation().IsInteger32()) { 1128 LMathFloorI* result = new (zone()) LMathFloorI(input); 1129 return AssignEnvironment(AssignPointerMap(DefineAsRegister(result))); 1130 } else { 1131 DCHECK(instr->representation().IsDouble()); 1132 LMathFloorD* result = new (zone()) LMathFloorD(input); 1133 return DefineAsRegister(result); 1134 } 1135 } 1136 1137 LInstruction* LChunkBuilder::DoMathRound(HUnaryMathOperation* instr) { 1138 DCHECK(instr->value()->representation().IsDouble()); 1139 LOperand* input = UseRegister(instr->value()); 1140 if (instr->representation().IsInteger32()) { 1141 LOperand* temp = FixedTemp(xmm4); 1142 LMathRoundI* result = new (zone()) LMathRoundI(input, temp); 1143 return AssignEnvironment(AssignPointerMap(DefineAsRegister(result))); 1144 } else { 1145 DCHECK(instr->representation().IsDouble()); 1146 LMathRoundD* result = new (zone()) LMathRoundD(input); 1147 return DefineAsRegister(result); 1148 } 1149 } 1150 1151 LInstruction* LChunkBuilder::DoMathFround(HUnaryMathOperation* instr) { 1152 LOperand* input = UseRegister(instr->value()); 1153 LMathFround* result = new (zone()) LMathFround(input); 1154 return DefineAsRegister(result); 1155 } 1156 1157 1158 LInstruction* LChunkBuilder::DoMathAbs(HUnaryMathOperation* instr) { 1159 LOperand* context = UseAny(instr->context()); // Deferred use. 1160 LOperand* input = UseRegisterAtStart(instr->value()); 1161 LInstruction* result = 1162 DefineSameAsFirst(new(zone()) LMathAbs(context, input)); 1163 Representation r = instr->value()->representation(); 1164 if (!r.IsDouble() && !r.IsSmiOrInteger32()) result = AssignPointerMap(result); 1165 if (!r.IsDouble()) result = AssignEnvironment(result); 1166 return result; 1167 } 1168 1169 1170 LInstruction* LChunkBuilder::DoMathLog(HUnaryMathOperation* instr) { 1171 DCHECK(instr->representation().IsDouble()); 1172 DCHECK(instr->value()->representation().IsDouble()); 1173 LOperand* input = UseRegisterAtStart(instr->value()); 1174 return MarkAsCall(DefineSameAsFirst(new(zone()) LMathLog(input)), instr); 1175 } 1176 1177 1178 LInstruction* LChunkBuilder::DoMathClz32(HUnaryMathOperation* instr) { 1179 LOperand* input = UseRegisterAtStart(instr->value()); 1180 LMathClz32* result = new(zone()) LMathClz32(input); 1181 return DefineAsRegister(result); 1182 } 1183 1184 LInstruction* LChunkBuilder::DoMathCos(HUnaryMathOperation* instr) { 1185 DCHECK(instr->representation().IsDouble()); 1186 DCHECK(instr->value()->representation().IsDouble()); 1187 LOperand* input = UseRegisterAtStart(instr->value()); 1188 return MarkAsCall(DefineSameAsFirst(new (zone()) LMathCos(input)), instr); 1189 } 1190 1191 LInstruction* LChunkBuilder::DoMathSin(HUnaryMathOperation* instr) { 1192 DCHECK(instr->representation().IsDouble()); 1193 DCHECK(instr->value()->representation().IsDouble()); 1194 LOperand* input = UseRegisterAtStart(instr->value()); 1195 return MarkAsCall(DefineSameAsFirst(new (zone()) LMathSin(input)), instr); 1196 } 1197 1198 LInstruction* LChunkBuilder::DoMathExp(HUnaryMathOperation* instr) { 1199 DCHECK(instr->representation().IsDouble()); 1200 DCHECK(instr->value()->representation().IsDouble()); 1201 LOperand* input = UseRegisterAtStart(instr->value()); 1202 return MarkAsCall(DefineSameAsFirst(new (zone()) LMathExp(input)), instr); 1203 } 1204 1205 1206 LInstruction* LChunkBuilder::DoMathSqrt(HUnaryMathOperation* instr) { 1207 LOperand* input = UseAtStart(instr->value()); 1208 return DefineAsRegister(new(zone()) LMathSqrt(input)); 1209 } 1210 1211 1212 LInstruction* LChunkBuilder::DoMathPowHalf(HUnaryMathOperation* instr) { 1213 LOperand* input = UseRegisterAtStart(instr->value()); 1214 LOperand* temp = TempRegister(); 1215 LMathPowHalf* result = new(zone()) LMathPowHalf(input, temp); 1216 return DefineSameAsFirst(result); 1217 } 1218 1219 1220 LInstruction* LChunkBuilder::DoCallNewArray(HCallNewArray* instr) { 1221 LOperand* context = UseFixed(instr->context(), esi); 1222 LOperand* constructor = UseFixed(instr->constructor(), edi); 1223 LCallNewArray* result = new(zone()) LCallNewArray(context, constructor); 1224 return MarkAsCall(DefineFixed(result, eax), instr); 1225 } 1226 1227 1228 LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) { 1229 LOperand* context = UseFixed(instr->context(), esi); 1230 return MarkAsCall(DefineFixed(new(zone()) LCallRuntime(context), eax), instr); 1231 } 1232 1233 1234 LInstruction* LChunkBuilder::DoRor(HRor* instr) { 1235 return DoShift(Token::ROR, instr); 1236 } 1237 1238 1239 LInstruction* LChunkBuilder::DoShr(HShr* instr) { 1240 return DoShift(Token::SHR, instr); 1241 } 1242 1243 1244 LInstruction* LChunkBuilder::DoSar(HSar* instr) { 1245 return DoShift(Token::SAR, instr); 1246 } 1247 1248 1249 LInstruction* LChunkBuilder::DoShl(HShl* instr) { 1250 return DoShift(Token::SHL, instr); 1251 } 1252 1253 1254 LInstruction* LChunkBuilder::DoBitwise(HBitwise* instr) { 1255 if (instr->representation().IsSmiOrInteger32()) { 1256 DCHECK(instr->left()->representation().Equals(instr->representation())); 1257 DCHECK(instr->right()->representation().Equals(instr->representation())); 1258 DCHECK(instr->CheckFlag(HValue::kTruncatingToInt32)); 1259 1260 LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand()); 1261 LOperand* right = UseOrConstantAtStart(instr->BetterRightOperand()); 1262 return DefineSameAsFirst(new(zone()) LBitI(left, right)); 1263 } else { 1264 return DoArithmeticT(instr->op(), instr); 1265 } 1266 } 1267 1268 1269 LInstruction* LChunkBuilder::DoDivByPowerOf2I(HDiv* instr) { 1270 DCHECK(instr->representation().IsSmiOrInteger32()); 1271 DCHECK(instr->left()->representation().Equals(instr->representation())); 1272 DCHECK(instr->right()->representation().Equals(instr->representation())); 1273 LOperand* dividend = UseRegister(instr->left()); 1274 int32_t divisor = instr->right()->GetInteger32Constant(); 1275 LInstruction* result = DefineAsRegister(new(zone()) LDivByPowerOf2I( 1276 dividend, divisor)); 1277 if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) || 1278 (instr->CheckFlag(HValue::kCanOverflow) && divisor == -1) || 1279 (!instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32) && 1280 divisor != 1 && divisor != -1)) { 1281 result = AssignEnvironment(result); 1282 } 1283 return result; 1284 } 1285 1286 1287 LInstruction* LChunkBuilder::DoDivByConstI(HDiv* instr) { 1288 DCHECK(instr->representation().IsInteger32()); 1289 DCHECK(instr->left()->representation().Equals(instr->representation())); 1290 DCHECK(instr->right()->representation().Equals(instr->representation())); 1291 LOperand* dividend = UseRegister(instr->left()); 1292 int32_t divisor = instr->right()->GetInteger32Constant(); 1293 LOperand* temp1 = FixedTemp(eax); 1294 LOperand* temp2 = FixedTemp(edx); 1295 LInstruction* result = DefineFixed(new(zone()) LDivByConstI( 1296 dividend, divisor, temp1, temp2), edx); 1297 if (divisor == 0 || 1298 (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) || 1299 !instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) { 1300 result = AssignEnvironment(result); 1301 } 1302 return result; 1303 } 1304 1305 1306 LInstruction* LChunkBuilder::DoDivI(HDiv* instr) { 1307 DCHECK(instr->representation().IsSmiOrInteger32()); 1308 DCHECK(instr->left()->representation().Equals(instr->representation())); 1309 DCHECK(instr->right()->representation().Equals(instr->representation())); 1310 LOperand* dividend = UseFixed(instr->left(), eax); 1311 LOperand* divisor = UseRegister(instr->right()); 1312 LOperand* temp = FixedTemp(edx); 1313 LInstruction* result = DefineFixed(new(zone()) LDivI( 1314 dividend, divisor, temp), eax); 1315 if (instr->CheckFlag(HValue::kCanBeDivByZero) || 1316 instr->CheckFlag(HValue::kBailoutOnMinusZero) || 1317 instr->CheckFlag(HValue::kCanOverflow) || 1318 !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32)) { 1319 result = AssignEnvironment(result); 1320 } 1321 return result; 1322 } 1323 1324 1325 LInstruction* LChunkBuilder::DoDiv(HDiv* instr) { 1326 if (instr->representation().IsSmiOrInteger32()) { 1327 if (instr->RightIsPowerOf2()) { 1328 return DoDivByPowerOf2I(instr); 1329 } else if (instr->right()->IsConstant()) { 1330 return DoDivByConstI(instr); 1331 } else { 1332 return DoDivI(instr); 1333 } 1334 } else if (instr->representation().IsDouble()) { 1335 return DoArithmeticD(Token::DIV, instr); 1336 } else { 1337 return DoArithmeticT(Token::DIV, instr); 1338 } 1339 } 1340 1341 1342 LInstruction* LChunkBuilder::DoFlooringDivByPowerOf2I(HMathFloorOfDiv* instr) { 1343 LOperand* dividend = UseRegisterAtStart(instr->left()); 1344 int32_t divisor = instr->right()->GetInteger32Constant(); 1345 LInstruction* result = DefineSameAsFirst(new(zone()) LFlooringDivByPowerOf2I( 1346 dividend, divisor)); 1347 if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) || 1348 (instr->CheckFlag(HValue::kLeftCanBeMinInt) && divisor == -1)) { 1349 result = AssignEnvironment(result); 1350 } 1351 return result; 1352 } 1353 1354 1355 LInstruction* LChunkBuilder::DoFlooringDivByConstI(HMathFloorOfDiv* instr) { 1356 DCHECK(instr->representation().IsInteger32()); 1357 DCHECK(instr->left()->representation().Equals(instr->representation())); 1358 DCHECK(instr->right()->representation().Equals(instr->representation())); 1359 LOperand* dividend = UseRegister(instr->left()); 1360 int32_t divisor = instr->right()->GetInteger32Constant(); 1361 LOperand* temp1 = FixedTemp(eax); 1362 LOperand* temp2 = FixedTemp(edx); 1363 LOperand* temp3 = 1364 ((divisor > 0 && !instr->CheckFlag(HValue::kLeftCanBeNegative)) || 1365 (divisor < 0 && !instr->CheckFlag(HValue::kLeftCanBePositive))) ? 1366 NULL : TempRegister(); 1367 LInstruction* result = 1368 DefineFixed(new(zone()) LFlooringDivByConstI(dividend, 1369 divisor, 1370 temp1, 1371 temp2, 1372 temp3), 1373 edx); 1374 if (divisor == 0 || 1375 (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0)) { 1376 result = AssignEnvironment(result); 1377 } 1378 return result; 1379 } 1380 1381 1382 LInstruction* LChunkBuilder::DoFlooringDivI(HMathFloorOfDiv* instr) { 1383 DCHECK(instr->representation().IsSmiOrInteger32()); 1384 DCHECK(instr->left()->representation().Equals(instr->representation())); 1385 DCHECK(instr->right()->representation().Equals(instr->representation())); 1386 LOperand* dividend = UseFixed(instr->left(), eax); 1387 LOperand* divisor = UseRegister(instr->right()); 1388 LOperand* temp = FixedTemp(edx); 1389 LInstruction* result = DefineFixed(new(zone()) LFlooringDivI( 1390 dividend, divisor, temp), eax); 1391 if (instr->CheckFlag(HValue::kCanBeDivByZero) || 1392 instr->CheckFlag(HValue::kBailoutOnMinusZero) || 1393 instr->CheckFlag(HValue::kCanOverflow)) { 1394 result = AssignEnvironment(result); 1395 } 1396 return result; 1397 } 1398 1399 1400 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) { 1401 if (instr->RightIsPowerOf2()) { 1402 return DoFlooringDivByPowerOf2I(instr); 1403 } else if (instr->right()->IsConstant()) { 1404 return DoFlooringDivByConstI(instr); 1405 } else { 1406 return DoFlooringDivI(instr); 1407 } 1408 } 1409 1410 1411 LInstruction* LChunkBuilder::DoModByPowerOf2I(HMod* instr) { 1412 DCHECK(instr->representation().IsSmiOrInteger32()); 1413 DCHECK(instr->left()->representation().Equals(instr->representation())); 1414 DCHECK(instr->right()->representation().Equals(instr->representation())); 1415 LOperand* dividend = UseRegisterAtStart(instr->left()); 1416 int32_t divisor = instr->right()->GetInteger32Constant(); 1417 LInstruction* result = DefineSameAsFirst(new(zone()) LModByPowerOf2I( 1418 dividend, divisor)); 1419 if (instr->CheckFlag(HValue::kLeftCanBeNegative) && 1420 instr->CheckFlag(HValue::kBailoutOnMinusZero)) { 1421 result = AssignEnvironment(result); 1422 } 1423 return result; 1424 } 1425 1426 1427 LInstruction* LChunkBuilder::DoModByConstI(HMod* instr) { 1428 DCHECK(instr->representation().IsSmiOrInteger32()); 1429 DCHECK(instr->left()->representation().Equals(instr->representation())); 1430 DCHECK(instr->right()->representation().Equals(instr->representation())); 1431 LOperand* dividend = UseRegister(instr->left()); 1432 int32_t divisor = instr->right()->GetInteger32Constant(); 1433 LOperand* temp1 = FixedTemp(eax); 1434 LOperand* temp2 = FixedTemp(edx); 1435 LInstruction* result = DefineFixed(new(zone()) LModByConstI( 1436 dividend, divisor, temp1, temp2), eax); 1437 if (divisor == 0 || instr->CheckFlag(HValue::kBailoutOnMinusZero)) { 1438 result = AssignEnvironment(result); 1439 } 1440 return result; 1441 } 1442 1443 1444 LInstruction* LChunkBuilder::DoModI(HMod* instr) { 1445 DCHECK(instr->representation().IsSmiOrInteger32()); 1446 DCHECK(instr->left()->representation().Equals(instr->representation())); 1447 DCHECK(instr->right()->representation().Equals(instr->representation())); 1448 LOperand* dividend = UseFixed(instr->left(), eax); 1449 LOperand* divisor = UseRegister(instr->right()); 1450 LOperand* temp = FixedTemp(edx); 1451 LInstruction* result = DefineFixed(new(zone()) LModI( 1452 dividend, divisor, temp), edx); 1453 if (instr->CheckFlag(HValue::kCanBeDivByZero) || 1454 instr->CheckFlag(HValue::kBailoutOnMinusZero)) { 1455 result = AssignEnvironment(result); 1456 } 1457 return result; 1458 } 1459 1460 1461 LInstruction* LChunkBuilder::DoMod(HMod* instr) { 1462 if (instr->representation().IsSmiOrInteger32()) { 1463 if (instr->RightIsPowerOf2()) { 1464 return DoModByPowerOf2I(instr); 1465 } else if (instr->right()->IsConstant()) { 1466 return DoModByConstI(instr); 1467 } else { 1468 return DoModI(instr); 1469 } 1470 } else if (instr->representation().IsDouble()) { 1471 return DoArithmeticD(Token::MOD, instr); 1472 } else { 1473 return DoArithmeticT(Token::MOD, instr); 1474 } 1475 } 1476 1477 1478 LInstruction* LChunkBuilder::DoMul(HMul* instr) { 1479 if (instr->representation().IsSmiOrInteger32()) { 1480 DCHECK(instr->left()->representation().Equals(instr->representation())); 1481 DCHECK(instr->right()->representation().Equals(instr->representation())); 1482 LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand()); 1483 HValue* h_right = instr->BetterRightOperand(); 1484 LOperand* right = UseOrConstant(h_right); 1485 LOperand* temp = NULL; 1486 if (instr->CheckFlag(HValue::kBailoutOnMinusZero)) { 1487 temp = TempRegister(); 1488 } 1489 LMulI* mul = new(zone()) LMulI(left, right, temp); 1490 int constant_value = 1491 h_right->IsConstant() ? HConstant::cast(h_right)->Integer32Value() : 0; 1492 // |needs_environment| must mirror the cases where LCodeGen::DoMulI calls 1493 // |DeoptimizeIf|. 1494 bool needs_environment = 1495 instr->CheckFlag(HValue::kCanOverflow) || 1496 (instr->CheckFlag(HValue::kBailoutOnMinusZero) && 1497 (!right->IsConstantOperand() || constant_value <= 0)); 1498 if (needs_environment) { 1499 AssignEnvironment(mul); 1500 } 1501 return DefineSameAsFirst(mul); 1502 } else if (instr->representation().IsDouble()) { 1503 return DoArithmeticD(Token::MUL, instr); 1504 } else { 1505 return DoArithmeticT(Token::MUL, instr); 1506 } 1507 } 1508 1509 1510 LInstruction* LChunkBuilder::DoSub(HSub* instr) { 1511 if (instr->representation().IsSmiOrInteger32()) { 1512 DCHECK(instr->left()->representation().Equals(instr->representation())); 1513 DCHECK(instr->right()->representation().Equals(instr->representation())); 1514 LOperand* left = UseRegisterAtStart(instr->left()); 1515 LOperand* right = UseOrConstantAtStart(instr->right()); 1516 LSubI* sub = new(zone()) LSubI(left, right); 1517 LInstruction* result = DefineSameAsFirst(sub); 1518 if (instr->CheckFlag(HValue::kCanOverflow)) { 1519 result = AssignEnvironment(result); 1520 } 1521 return result; 1522 } else if (instr->representation().IsDouble()) { 1523 return DoArithmeticD(Token::SUB, instr); 1524 } else { 1525 return DoArithmeticT(Token::SUB, instr); 1526 } 1527 } 1528 1529 1530 LInstruction* LChunkBuilder::DoAdd(HAdd* instr) { 1531 if (instr->representation().IsSmiOrInteger32()) { 1532 DCHECK(instr->left()->representation().Equals(instr->representation())); 1533 DCHECK(instr->right()->representation().Equals(instr->representation())); 1534 // Check to see if it would be advantageous to use an lea instruction rather 1535 // than an add. This is the case when no overflow check is needed and there 1536 // are multiple uses of the add's inputs, so using a 3-register add will 1537 // preserve all input values for later uses. 1538 bool use_lea = LAddI::UseLea(instr); 1539 LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand()); 1540 HValue* right_candidate = instr->BetterRightOperand(); 1541 LOperand* right = use_lea 1542 ? UseRegisterOrConstantAtStart(right_candidate) 1543 : UseOrConstantAtStart(right_candidate); 1544 LAddI* add = new(zone()) LAddI(left, right); 1545 bool can_overflow = instr->CheckFlag(HValue::kCanOverflow); 1546 LInstruction* result = use_lea 1547 ? DefineAsRegister(add) 1548 : DefineSameAsFirst(add); 1549 if (can_overflow) { 1550 result = AssignEnvironment(result); 1551 } 1552 return result; 1553 } else if (instr->representation().IsDouble()) { 1554 return DoArithmeticD(Token::ADD, instr); 1555 } else if (instr->representation().IsExternal()) { 1556 DCHECK(instr->IsConsistentExternalRepresentation()); 1557 DCHECK(!instr->CheckFlag(HValue::kCanOverflow)); 1558 bool use_lea = LAddI::UseLea(instr); 1559 LOperand* left = UseRegisterAtStart(instr->left()); 1560 HValue* right_candidate = instr->right(); 1561 LOperand* right = use_lea 1562 ? UseRegisterOrConstantAtStart(right_candidate) 1563 : UseOrConstantAtStart(right_candidate); 1564 LAddI* add = new(zone()) LAddI(left, right); 1565 LInstruction* result = use_lea 1566 ? DefineAsRegister(add) 1567 : DefineSameAsFirst(add); 1568 return result; 1569 } else { 1570 return DoArithmeticT(Token::ADD, instr); 1571 } 1572 } 1573 1574 1575 LInstruction* LChunkBuilder::DoMathMinMax(HMathMinMax* instr) { 1576 LOperand* left = NULL; 1577 LOperand* right = NULL; 1578 if (instr->representation().IsSmiOrInteger32()) { 1579 DCHECK(instr->left()->representation().Equals(instr->representation())); 1580 DCHECK(instr->right()->representation().Equals(instr->representation())); 1581 left = UseRegisterAtStart(instr->BetterLeftOperand()); 1582 right = UseOrConstantAtStart(instr->BetterRightOperand()); 1583 } else { 1584 DCHECK(instr->representation().IsDouble()); 1585 DCHECK(instr->left()->representation().IsDouble()); 1586 DCHECK(instr->right()->representation().IsDouble()); 1587 left = UseRegisterAtStart(instr->left()); 1588 right = UseRegisterAtStart(instr->right()); 1589 } 1590 LMathMinMax* minmax = new(zone()) LMathMinMax(left, right); 1591 return DefineSameAsFirst(minmax); 1592 } 1593 1594 1595 LInstruction* LChunkBuilder::DoPower(HPower* instr) { 1596 DCHECK(instr->representation().IsDouble()); 1597 // We call a C function for double power. It can't trigger a GC. 1598 // We need to use fixed result register for the call. 1599 Representation exponent_type = instr->right()->representation(); 1600 DCHECK(instr->left()->representation().IsDouble()); 1601 LOperand* left = UseFixedDouble(instr->left(), xmm2); 1602 LOperand* right = 1603 exponent_type.IsDouble() 1604 ? UseFixedDouble(instr->right(), xmm1) 1605 : UseFixed(instr->right(), MathPowTaggedDescriptor::exponent()); 1606 LPower* result = new(zone()) LPower(left, right); 1607 return MarkAsCall(DefineFixedDouble(result, xmm3), instr, 1608 CAN_DEOPTIMIZE_EAGERLY); 1609 } 1610 1611 1612 LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) { 1613 DCHECK(instr->left()->representation().IsSmiOrTagged()); 1614 DCHECK(instr->right()->representation().IsSmiOrTagged()); 1615 LOperand* context = UseFixed(instr->context(), esi); 1616 LOperand* left = UseFixed(instr->left(), edx); 1617 LOperand* right = UseFixed(instr->right(), eax); 1618 LCmpT* result = new(zone()) LCmpT(context, left, right); 1619 return MarkAsCall(DefineFixed(result, eax), instr); 1620 } 1621 1622 1623 LInstruction* LChunkBuilder::DoCompareNumericAndBranch( 1624 HCompareNumericAndBranch* instr) { 1625 Representation r = instr->representation(); 1626 if (r.IsSmiOrInteger32()) { 1627 DCHECK(instr->left()->representation().Equals(r)); 1628 DCHECK(instr->right()->representation().Equals(r)); 1629 LOperand* left = UseRegisterOrConstantAtStart(instr->left()); 1630 LOperand* right = UseOrConstantAtStart(instr->right()); 1631 return new(zone()) LCompareNumericAndBranch(left, right); 1632 } else { 1633 DCHECK(r.IsDouble()); 1634 DCHECK(instr->left()->representation().IsDouble()); 1635 DCHECK(instr->right()->representation().IsDouble()); 1636 LOperand* left; 1637 LOperand* right; 1638 if (CanBeImmediateConstant(instr->left()) && 1639 CanBeImmediateConstant(instr->right())) { 1640 // The code generator requires either both inputs to be constant 1641 // operands, or neither. 1642 left = UseConstant(instr->left()); 1643 right = UseConstant(instr->right()); 1644 } else { 1645 left = UseRegisterAtStart(instr->left()); 1646 right = UseRegisterAtStart(instr->right()); 1647 } 1648 return new(zone()) LCompareNumericAndBranch(left, right); 1649 } 1650 } 1651 1652 1653 LInstruction* LChunkBuilder::DoCompareObjectEqAndBranch( 1654 HCompareObjectEqAndBranch* instr) { 1655 LOperand* left = UseRegisterAtStart(instr->left()); 1656 LOperand* right = UseOrConstantAtStart(instr->right()); 1657 return new(zone()) LCmpObjectEqAndBranch(left, right); 1658 } 1659 1660 1661 LInstruction* LChunkBuilder::DoCompareHoleAndBranch( 1662 HCompareHoleAndBranch* instr) { 1663 LOperand* value = UseRegisterAtStart(instr->value()); 1664 return new(zone()) LCmpHoleAndBranch(value); 1665 } 1666 1667 1668 LInstruction* LChunkBuilder::DoIsStringAndBranch(HIsStringAndBranch* instr) { 1669 DCHECK(instr->value()->representation().IsTagged()); 1670 LOperand* temp = TempRegister(); 1671 return new(zone()) LIsStringAndBranch(UseRegister(instr->value()), temp); 1672 } 1673 1674 1675 LInstruction* LChunkBuilder::DoIsSmiAndBranch(HIsSmiAndBranch* instr) { 1676 DCHECK(instr->value()->representation().IsTagged()); 1677 return new(zone()) LIsSmiAndBranch(Use(instr->value())); 1678 } 1679 1680 1681 LInstruction* LChunkBuilder::DoIsUndetectableAndBranch( 1682 HIsUndetectableAndBranch* instr) { 1683 DCHECK(instr->value()->representation().IsTagged()); 1684 return new(zone()) LIsUndetectableAndBranch( 1685 UseRegisterAtStart(instr->value()), TempRegister()); 1686 } 1687 1688 1689 LInstruction* LChunkBuilder::DoStringCompareAndBranch( 1690 HStringCompareAndBranch* instr) { 1691 DCHECK(instr->left()->representation().IsTagged()); 1692 DCHECK(instr->right()->representation().IsTagged()); 1693 LOperand* context = UseFixed(instr->context(), esi); 1694 LOperand* left = UseFixed(instr->left(), edx); 1695 LOperand* right = UseFixed(instr->right(), eax); 1696 1697 LStringCompareAndBranch* result = new(zone()) 1698 LStringCompareAndBranch(context, left, right); 1699 1700 return MarkAsCall(result, instr); 1701 } 1702 1703 1704 LInstruction* LChunkBuilder::DoHasInstanceTypeAndBranch( 1705 HHasInstanceTypeAndBranch* instr) { 1706 DCHECK(instr->value()->representation().IsTagged()); 1707 return new(zone()) LHasInstanceTypeAndBranch( 1708 UseRegisterAtStart(instr->value()), 1709 TempRegister()); 1710 } 1711 1712 1713 LInstruction* LChunkBuilder::DoGetCachedArrayIndex( 1714 HGetCachedArrayIndex* instr) { 1715 DCHECK(instr->value()->representation().IsTagged()); 1716 LOperand* value = UseRegisterAtStart(instr->value()); 1717 1718 return DefineAsRegister(new(zone()) LGetCachedArrayIndex(value)); 1719 } 1720 1721 1722 LInstruction* LChunkBuilder::DoHasCachedArrayIndexAndBranch( 1723 HHasCachedArrayIndexAndBranch* instr) { 1724 DCHECK(instr->value()->representation().IsTagged()); 1725 return new(zone()) LHasCachedArrayIndexAndBranch( 1726 UseRegisterAtStart(instr->value())); 1727 } 1728 1729 1730 LInstruction* LChunkBuilder::DoClassOfTestAndBranch( 1731 HClassOfTestAndBranch* instr) { 1732 DCHECK(instr->value()->representation().IsTagged()); 1733 return new(zone()) LClassOfTestAndBranch(UseRegister(instr->value()), 1734 TempRegister(), 1735 TempRegister()); 1736 } 1737 1738 1739 LInstruction* LChunkBuilder::DoSeqStringGetChar(HSeqStringGetChar* instr) { 1740 LOperand* string = UseRegisterAtStart(instr->string()); 1741 LOperand* index = UseRegisterOrConstantAtStart(instr->index()); 1742 return DefineAsRegister(new(zone()) LSeqStringGetChar(string, index)); 1743 } 1744 1745 1746 LOperand* LChunkBuilder::GetSeqStringSetCharOperand(HSeqStringSetChar* instr) { 1747 if (instr->encoding() == String::ONE_BYTE_ENCODING) { 1748 if (FLAG_debug_code) { 1749 return UseFixed(instr->value(), eax); 1750 } else { 1751 return UseFixedOrConstant(instr->value(), eax); 1752 } 1753 } else { 1754 if (FLAG_debug_code) { 1755 return UseRegisterAtStart(instr->value()); 1756 } else { 1757 return UseRegisterOrConstantAtStart(instr->value()); 1758 } 1759 } 1760 } 1761 1762 1763 LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) { 1764 LOperand* string = UseRegisterAtStart(instr->string()); 1765 LOperand* index = FLAG_debug_code 1766 ? UseRegisterAtStart(instr->index()) 1767 : UseRegisterOrConstantAtStart(instr->index()); 1768 LOperand* value = GetSeqStringSetCharOperand(instr); 1769 LOperand* context = FLAG_debug_code ? UseFixed(instr->context(), esi) : NULL; 1770 LInstruction* result = new(zone()) LSeqStringSetChar(context, string, 1771 index, value); 1772 if (FLAG_debug_code) { 1773 result = MarkAsCall(result, instr); 1774 } 1775 return result; 1776 } 1777 1778 1779 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) { 1780 if (!FLAG_debug_code && instr->skip_check()) return NULL; 1781 LOperand* index = UseRegisterOrConstantAtStart(instr->index()); 1782 LOperand* length = !index->IsConstantOperand() 1783 ? UseOrConstantAtStart(instr->length()) 1784 : UseAtStart(instr->length()); 1785 LInstruction* result = new(zone()) LBoundsCheck(index, length); 1786 if (!FLAG_debug_code || !instr->skip_check()) { 1787 result = AssignEnvironment(result); 1788 } 1789 return result; 1790 } 1791 1792 1793 LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) { 1794 // The control instruction marking the end of a block that completed 1795 // abruptly (e.g., threw an exception). There is nothing specific to do. 1796 return NULL; 1797 } 1798 1799 1800 LInstruction* LChunkBuilder::DoUseConst(HUseConst* instr) { 1801 return NULL; 1802 } 1803 1804 1805 LInstruction* LChunkBuilder::DoForceRepresentation(HForceRepresentation* bad) { 1806 // All HForceRepresentation instructions should be eliminated in the 1807 // representation change phase of Hydrogen. 1808 UNREACHABLE(); 1809 return NULL; 1810 } 1811 1812 1813 LInstruction* LChunkBuilder::DoChange(HChange* instr) { 1814 Representation from = instr->from(); 1815 Representation to = instr->to(); 1816 HValue* val = instr->value(); 1817 if (from.IsSmi()) { 1818 if (to.IsTagged()) { 1819 LOperand* value = UseRegister(val); 1820 return DefineSameAsFirst(new(zone()) LDummyUse(value)); 1821 } 1822 from = Representation::Tagged(); 1823 } 1824 if (from.IsTagged()) { 1825 if (to.IsDouble()) { 1826 LOperand* value = UseRegister(val); 1827 LOperand* temp = TempRegister(); 1828 LInstruction* result = 1829 DefineAsRegister(new(zone()) LNumberUntagD(value, temp)); 1830 if (!val->representation().IsSmi()) result = AssignEnvironment(result); 1831 return result; 1832 } else if (to.IsSmi()) { 1833 LOperand* value = UseRegister(val); 1834 if (val->type().IsSmi()) { 1835 return DefineSameAsFirst(new(zone()) LDummyUse(value)); 1836 } 1837 return AssignEnvironment(DefineSameAsFirst(new(zone()) LCheckSmi(value))); 1838 } else { 1839 DCHECK(to.IsInteger32()); 1840 if (val->type().IsSmi() || val->representation().IsSmi()) { 1841 LOperand* value = UseRegister(val); 1842 return DefineSameAsFirst(new(zone()) LSmiUntag(value, false)); 1843 } else { 1844 LOperand* value = UseRegister(val); 1845 bool truncating = instr->CanTruncateToInt32(); 1846 LOperand* xmm_temp = !truncating ? FixedTemp(xmm1) : NULL; 1847 LInstruction* result = 1848 DefineSameAsFirst(new(zone()) LTaggedToI(value, xmm_temp)); 1849 if (!val->representation().IsSmi()) result = AssignEnvironment(result); 1850 return result; 1851 } 1852 } 1853 } else if (from.IsDouble()) { 1854 if (to.IsTagged()) { 1855 info()->MarkAsDeferredCalling(); 1856 LOperand* value = UseRegisterAtStart(val); 1857 LOperand* temp = FLAG_inline_new ? TempRegister() : NULL; 1858 LUnallocated* result_temp = TempRegister(); 1859 LNumberTagD* result = new(zone()) LNumberTagD(value, temp); 1860 return AssignPointerMap(Define(result, result_temp)); 1861 } else if (to.IsSmi()) { 1862 LOperand* value = UseRegister(val); 1863 return AssignEnvironment( 1864 DefineAsRegister(new(zone()) LDoubleToSmi(value))); 1865 } else { 1866 DCHECK(to.IsInteger32()); 1867 bool truncating = instr->CanTruncateToInt32(); 1868 bool needs_temp = !truncating; 1869 LOperand* value = needs_temp ? UseTempRegister(val) : UseRegister(val); 1870 LOperand* temp = needs_temp ? TempRegister() : NULL; 1871 LInstruction* result = 1872 DefineAsRegister(new(zone()) LDoubleToI(value, temp)); 1873 if (!truncating) result = AssignEnvironment(result); 1874 return result; 1875 } 1876 } else if (from.IsInteger32()) { 1877 info()->MarkAsDeferredCalling(); 1878 if (to.IsTagged()) { 1879 LOperand* value = UseRegister(val); 1880 if (!instr->CheckFlag(HValue::kCanOverflow)) { 1881 return DefineSameAsFirst(new(zone()) LSmiTag(value)); 1882 } else if (val->CheckFlag(HInstruction::kUint32)) { 1883 LOperand* temp = TempRegister(); 1884 LNumberTagU* result = new(zone()) LNumberTagU(value, temp); 1885 return AssignPointerMap(DefineSameAsFirst(result)); 1886 } else { 1887 LOperand* temp = TempRegister(); 1888 LNumberTagI* result = new(zone()) LNumberTagI(value, temp); 1889 return AssignPointerMap(DefineSameAsFirst(result)); 1890 } 1891 } else if (to.IsSmi()) { 1892 LOperand* value = UseRegister(val); 1893 LInstruction* result = DefineSameAsFirst(new(zone()) LSmiTag(value)); 1894 if (instr->CheckFlag(HValue::kCanOverflow)) { 1895 result = AssignEnvironment(result); 1896 } 1897 return result; 1898 } else { 1899 DCHECK(to.IsDouble()); 1900 if (val->CheckFlag(HInstruction::kUint32)) { 1901 return DefineAsRegister(new(zone()) LUint32ToDouble(UseRegister(val))); 1902 } else { 1903 return DefineAsRegister(new(zone()) LInteger32ToDouble(Use(val))); 1904 } 1905 } 1906 } 1907 UNREACHABLE(); 1908 return NULL; 1909 } 1910 1911 1912 LInstruction* LChunkBuilder::DoCheckHeapObject(HCheckHeapObject* instr) { 1913 LOperand* value = UseAtStart(instr->value()); 1914 LInstruction* result = new(zone()) LCheckNonSmi(value); 1915 if (!instr->value()->type().IsHeapObject()) { 1916 result = AssignEnvironment(result); 1917 } 1918 return result; 1919 } 1920 1921 1922 LInstruction* LChunkBuilder::DoCheckSmi(HCheckSmi* instr) { 1923 LOperand* value = UseRegisterAtStart(instr->value()); 1924 return AssignEnvironment(new(zone()) LCheckSmi(value)); 1925 } 1926 1927 1928 LInstruction* LChunkBuilder::DoCheckArrayBufferNotNeutered( 1929 HCheckArrayBufferNotNeutered* instr) { 1930 LOperand* view = UseRegisterAtStart(instr->value()); 1931 LOperand* scratch = TempRegister(); 1932 LCheckArrayBufferNotNeutered* result = 1933 new (zone()) LCheckArrayBufferNotNeutered(view, scratch); 1934 return AssignEnvironment(result); 1935 } 1936 1937 1938 LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) { 1939 LOperand* value = UseRegisterAtStart(instr->value()); 1940 LOperand* temp = TempRegister(); 1941 LCheckInstanceType* result = new(zone()) LCheckInstanceType(value, temp); 1942 return AssignEnvironment(result); 1943 } 1944 1945 1946 LInstruction* LChunkBuilder::DoCheckValue(HCheckValue* instr) { 1947 // If the object is in new space, we'll emit a global cell compare and so 1948 // want the value in a register. If the object gets promoted before we 1949 // emit code, we will still get the register but will do an immediate 1950 // compare instead of the cell compare. This is safe. 1951 LOperand* value = instr->object_in_new_space() 1952 ? UseRegisterAtStart(instr->value()) : UseAtStart(instr->value()); 1953 return AssignEnvironment(new(zone()) LCheckValue(value)); 1954 } 1955 1956 1957 LInstruction* LChunkBuilder::DoCheckMaps(HCheckMaps* instr) { 1958 if (instr->IsStabilityCheck()) return new(zone()) LCheckMaps; 1959 LOperand* value = UseRegisterAtStart(instr->value()); 1960 LInstruction* result = AssignEnvironment(new(zone()) LCheckMaps(value)); 1961 if (instr->HasMigrationTarget()) { 1962 info()->MarkAsDeferredCalling(); 1963 result = AssignPointerMap(result); 1964 } 1965 return result; 1966 } 1967 1968 1969 LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) { 1970 HValue* value = instr->value(); 1971 Representation input_rep = value->representation(); 1972 if (input_rep.IsDouble()) { 1973 LOperand* reg = UseRegister(value); 1974 return DefineFixed(new(zone()) LClampDToUint8(reg), eax); 1975 } else if (input_rep.IsInteger32()) { 1976 LOperand* reg = UseFixed(value, eax); 1977 return DefineFixed(new(zone()) LClampIToUint8(reg), eax); 1978 } else { 1979 DCHECK(input_rep.IsSmiOrTagged()); 1980 LOperand* reg = UseFixed(value, eax); 1981 // Register allocator doesn't (yet) support allocation of double 1982 // temps. Reserve xmm1 explicitly. 1983 LOperand* temp = FixedTemp(xmm1); 1984 LClampTToUint8* result = new(zone()) LClampTToUint8(reg, temp); 1985 return AssignEnvironment(DefineFixed(result, eax)); 1986 } 1987 } 1988 1989 1990 LInstruction* LChunkBuilder::DoDoubleBits(HDoubleBits* instr) { 1991 HValue* value = instr->value(); 1992 DCHECK(value->representation().IsDouble()); 1993 return DefineAsRegister(new(zone()) LDoubleBits(UseRegister(value))); 1994 } 1995 1996 1997 LInstruction* LChunkBuilder::DoReturn(HReturn* instr) { 1998 LOperand* context = info()->IsStub() ? UseFixed(instr->context(), esi) : NULL; 1999 LOperand* parameter_count = UseRegisterOrConstant(instr->parameter_count()); 2000 return new(zone()) LReturn( 2001 UseFixed(instr->value(), eax), context, parameter_count); 2002 } 2003 2004 2005 LInstruction* LChunkBuilder::DoConstant(HConstant* instr) { 2006 Representation r = instr->representation(); 2007 if (r.IsSmi()) { 2008 return DefineAsRegister(new(zone()) LConstantS); 2009 } else if (r.IsInteger32()) { 2010 return DefineAsRegister(new(zone()) LConstantI); 2011 } else if (r.IsDouble()) { 2012 uint64_t const bits = instr->DoubleValueAsBits(); 2013 LOperand* temp = bits ? TempRegister() : nullptr; 2014 return DefineAsRegister(new(zone()) LConstantD(temp)); 2015 } else if (r.IsExternal()) { 2016 return DefineAsRegister(new(zone()) LConstantE); 2017 } else if (r.IsTagged()) { 2018 return DefineAsRegister(new(zone()) LConstantT); 2019 } else { 2020 UNREACHABLE(); 2021 return NULL; 2022 } 2023 } 2024 2025 2026 LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) { 2027 LOperand* context = UseFixed(instr->context(), esi); 2028 LOperand* vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister()); 2029 2030 LLoadGlobalGeneric* result = new (zone()) LLoadGlobalGeneric(context, vector); 2031 return MarkAsCall(DefineFixed(result, eax), instr); 2032 } 2033 2034 2035 LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) { 2036 LOperand* context = UseRegisterAtStart(instr->value()); 2037 LInstruction* result = 2038 DefineAsRegister(new(zone()) LLoadContextSlot(context)); 2039 if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) { 2040 result = AssignEnvironment(result); 2041 } 2042 return result; 2043 } 2044 2045 2046 LInstruction* LChunkBuilder::DoStoreContextSlot(HStoreContextSlot* instr) { 2047 LOperand* value; 2048 LOperand* temp; 2049 LOperand* context = UseRegister(instr->context()); 2050 if (instr->NeedsWriteBarrier()) { 2051 value = UseTempRegister(instr->value()); 2052 temp = TempRegister(); 2053 } else { 2054 value = UseRegister(instr->value()); 2055 temp = NULL; 2056 } 2057 LInstruction* result = new(zone()) LStoreContextSlot(context, value, temp); 2058 if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) { 2059 result = AssignEnvironment(result); 2060 } 2061 return result; 2062 } 2063 2064 2065 LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) { 2066 LOperand* obj = (instr->access().IsExternalMemory() && 2067 instr->access().offset() == 0) 2068 ? UseRegisterOrConstantAtStart(instr->object()) 2069 : UseRegisterAtStart(instr->object()); 2070 return DefineAsRegister(new(zone()) LLoadNamedField(obj)); 2071 } 2072 2073 2074 LInstruction* LChunkBuilder::DoLoadNamedGeneric(HLoadNamedGeneric* instr) { 2075 LOperand* context = UseFixed(instr->context(), esi); 2076 LOperand* object = 2077 UseFixed(instr->object(), LoadDescriptor::ReceiverRegister()); 2078 LOperand* vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister()); 2079 LLoadNamedGeneric* result = new(zone()) LLoadNamedGeneric( 2080 context, object, vector); 2081 return MarkAsCall(DefineFixed(result, eax), instr); 2082 } 2083 2084 2085 LInstruction* LChunkBuilder::DoLoadFunctionPrototype( 2086 HLoadFunctionPrototype* instr) { 2087 return AssignEnvironment(DefineAsRegister( 2088 new(zone()) LLoadFunctionPrototype(UseRegister(instr->function()), 2089 TempRegister()))); 2090 } 2091 2092 2093 LInstruction* LChunkBuilder::DoLoadRoot(HLoadRoot* instr) { 2094 return DefineAsRegister(new(zone()) LLoadRoot); 2095 } 2096 2097 2098 LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) { 2099 DCHECK(instr->key()->representation().IsSmiOrInteger32()); 2100 ElementsKind elements_kind = instr->elements_kind(); 2101 bool clobbers_key = ExternalArrayOpRequiresTemp( 2102 instr->key()->representation(), elements_kind); 2103 LOperand* key = clobbers_key 2104 ? UseTempRegister(instr->key()) 2105 : UseRegisterOrConstantAtStart(instr->key()); 2106 LInstruction* result = NULL; 2107 2108 if (!instr->is_fixed_typed_array()) { 2109 LOperand* obj = UseRegisterAtStart(instr->elements()); 2110 result = DefineAsRegister(new (zone()) LLoadKeyed(obj, key, nullptr)); 2111 } else { 2112 DCHECK( 2113 (instr->representation().IsInteger32() && 2114 !(IsDoubleOrFloatElementsKind(instr->elements_kind()))) || 2115 (instr->representation().IsDouble() && 2116 (IsDoubleOrFloatElementsKind(instr->elements_kind())))); 2117 LOperand* backing_store = UseRegister(instr->elements()); 2118 LOperand* backing_store_owner = UseAny(instr->backing_store_owner()); 2119 result = DefineAsRegister( 2120 new (zone()) LLoadKeyed(backing_store, key, backing_store_owner)); 2121 } 2122 2123 bool needs_environment; 2124 if (instr->is_fixed_typed_array()) { 2125 // see LCodeGen::DoLoadKeyedExternalArray 2126 needs_environment = elements_kind == UINT32_ELEMENTS && 2127 !instr->CheckFlag(HInstruction::kUint32); 2128 } else { 2129 // see LCodeGen::DoLoadKeyedFixedDoubleArray and 2130 // LCodeGen::DoLoadKeyedFixedArray 2131 needs_environment = 2132 instr->RequiresHoleCheck() || 2133 (instr->hole_mode() == CONVERT_HOLE_TO_UNDEFINED && info()->IsStub()); 2134 } 2135 2136 if (needs_environment) { 2137 result = AssignEnvironment(result); 2138 } 2139 return result; 2140 } 2141 2142 2143 LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) { 2144 LOperand* context = UseFixed(instr->context(), esi); 2145 LOperand* object = 2146 UseFixed(instr->object(), LoadDescriptor::ReceiverRegister()); 2147 LOperand* key = UseFixed(instr->key(), LoadDescriptor::NameRegister()); 2148 LOperand* vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister()); 2149 LLoadKeyedGeneric* result = 2150 new(zone()) LLoadKeyedGeneric(context, object, key, vector); 2151 return MarkAsCall(DefineFixed(result, eax), instr); 2152 } 2153 2154 2155 LOperand* LChunkBuilder::GetStoreKeyedValueOperand(HStoreKeyed* instr) { 2156 ElementsKind elements_kind = instr->elements_kind(); 2157 2158 // Determine if we need a byte register in this case for the value. 2159 bool val_is_fixed_register = 2160 elements_kind == UINT8_ELEMENTS || 2161 elements_kind == INT8_ELEMENTS || 2162 elements_kind == UINT8_CLAMPED_ELEMENTS; 2163 if (val_is_fixed_register) { 2164 return UseFixed(instr->value(), eax); 2165 } 2166 2167 return UseRegister(instr->value()); 2168 } 2169 2170 2171 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) { 2172 if (!instr->is_fixed_typed_array()) { 2173 DCHECK(instr->elements()->representation().IsTagged()); 2174 DCHECK(instr->key()->representation().IsInteger32() || 2175 instr->key()->representation().IsSmi()); 2176 2177 if (instr->value()->representation().IsDouble()) { 2178 LOperand* object = UseRegisterAtStart(instr->elements()); 2179 LOperand* val = NULL; 2180 val = UseRegisterAtStart(instr->value()); 2181 LOperand* key = UseRegisterOrConstantAtStart(instr->key()); 2182 return new (zone()) LStoreKeyed(object, key, val, nullptr); 2183 } else { 2184 DCHECK(instr->value()->representation().IsSmiOrTagged()); 2185 bool needs_write_barrier = instr->NeedsWriteBarrier(); 2186 2187 LOperand* obj = UseRegister(instr->elements()); 2188 LOperand* val; 2189 LOperand* key; 2190 if (needs_write_barrier) { 2191 val = UseTempRegister(instr->value()); 2192 key = UseTempRegister(instr->key()); 2193 } else { 2194 val = UseRegisterOrConstantAtStart(instr->value()); 2195 key = UseRegisterOrConstantAtStart(instr->key()); 2196 } 2197 return new (zone()) LStoreKeyed(obj, key, val, nullptr); 2198 } 2199 } 2200 2201 ElementsKind elements_kind = instr->elements_kind(); 2202 DCHECK( 2203 (instr->value()->representation().IsInteger32() && 2204 !IsDoubleOrFloatElementsKind(elements_kind)) || 2205 (instr->value()->representation().IsDouble() && 2206 IsDoubleOrFloatElementsKind(elements_kind))); 2207 DCHECK(instr->elements()->representation().IsExternal()); 2208 2209 LOperand* backing_store = UseRegister(instr->elements()); 2210 LOperand* backing_store_owner = UseAny(instr->backing_store_owner()); 2211 LOperand* val = GetStoreKeyedValueOperand(instr); 2212 bool clobbers_key = ExternalArrayOpRequiresTemp( 2213 instr->key()->representation(), elements_kind); 2214 LOperand* key = clobbers_key 2215 ? UseTempRegister(instr->key()) 2216 : UseRegisterOrConstantAtStart(instr->key()); 2217 return new (zone()) LStoreKeyed(backing_store, key, val, backing_store_owner); 2218 } 2219 2220 2221 LInstruction* LChunkBuilder::DoStoreKeyedGeneric(HStoreKeyedGeneric* instr) { 2222 LOperand* context = UseFixed(instr->context(), esi); 2223 LOperand* object = 2224 UseFixed(instr->object(), StoreDescriptor::ReceiverRegister()); 2225 LOperand* key = UseFixed(instr->key(), StoreDescriptor::NameRegister()); 2226 LOperand* value = UseFixed(instr->value(), StoreDescriptor::ValueRegister()); 2227 2228 DCHECK(instr->object()->representation().IsTagged()); 2229 DCHECK(instr->key()->representation().IsTagged()); 2230 DCHECK(instr->value()->representation().IsTagged()); 2231 2232 LOperand* slot = FixedTemp(VectorStoreICDescriptor::SlotRegister()); 2233 LOperand* vector = FixedTemp(VectorStoreICDescriptor::VectorRegister()); 2234 2235 LStoreKeyedGeneric* result = new (zone()) 2236 LStoreKeyedGeneric(context, object, key, value, slot, vector); 2237 return MarkAsCall(result, instr); 2238 } 2239 2240 2241 LInstruction* LChunkBuilder::DoTransitionElementsKind( 2242 HTransitionElementsKind* instr) { 2243 if (IsSimpleMapChangeTransition(instr->from_kind(), instr->to_kind())) { 2244 LOperand* object = UseRegister(instr->object()); 2245 LOperand* new_map_reg = TempRegister(); 2246 LOperand* temp_reg = TempRegister(); 2247 LTransitionElementsKind* result = 2248 new(zone()) LTransitionElementsKind(object, NULL, 2249 new_map_reg, temp_reg); 2250 return result; 2251 } else { 2252 LOperand* object = UseFixed(instr->object(), eax); 2253 LOperand* context = UseFixed(instr->context(), esi); 2254 LTransitionElementsKind* result = 2255 new(zone()) LTransitionElementsKind(object, context, NULL, NULL); 2256 return MarkAsCall(result, instr); 2257 } 2258 } 2259 2260 2261 LInstruction* LChunkBuilder::DoTrapAllocationMemento( 2262 HTrapAllocationMemento* instr) { 2263 LOperand* object = UseRegister(instr->object()); 2264 LOperand* temp = TempRegister(); 2265 LTrapAllocationMemento* result = 2266 new(zone()) LTrapAllocationMemento(object, temp); 2267 return AssignEnvironment(result); 2268 } 2269 2270 2271 LInstruction* LChunkBuilder::DoMaybeGrowElements(HMaybeGrowElements* instr) { 2272 info()->MarkAsDeferredCalling(); 2273 LOperand* context = UseFixed(instr->context(), esi); 2274 LOperand* object = Use(instr->object()); 2275 LOperand* elements = Use(instr->elements()); 2276 LOperand* key = UseRegisterOrConstant(instr->key()); 2277 LOperand* current_capacity = UseRegisterOrConstant(instr->current_capacity()); 2278 2279 LMaybeGrowElements* result = new (zone()) 2280 LMaybeGrowElements(context, object, elements, key, current_capacity); 2281 DefineFixed(result, eax); 2282 return AssignPointerMap(AssignEnvironment(result)); 2283 } 2284 2285 2286 LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) { 2287 bool is_in_object = instr->access().IsInobject(); 2288 bool is_external_location = instr->access().IsExternalMemory() && 2289 instr->access().offset() == 0; 2290 bool needs_write_barrier = instr->NeedsWriteBarrier(); 2291 bool needs_write_barrier_for_map = instr->has_transition() && 2292 instr->NeedsWriteBarrierForMap(); 2293 2294 LOperand* obj; 2295 if (needs_write_barrier) { 2296 obj = is_in_object 2297 ? UseRegister(instr->object()) 2298 : UseTempRegister(instr->object()); 2299 } else if (is_external_location) { 2300 DCHECK(!is_in_object); 2301 DCHECK(!needs_write_barrier); 2302 DCHECK(!needs_write_barrier_for_map); 2303 obj = UseRegisterOrConstant(instr->object()); 2304 } else { 2305 obj = needs_write_barrier_for_map 2306 ? UseRegister(instr->object()) 2307 : UseRegisterAtStart(instr->object()); 2308 } 2309 2310 bool can_be_constant = instr->value()->IsConstant() && 2311 HConstant::cast(instr->value())->NotInNewSpace() && 2312 !instr->field_representation().IsDouble(); 2313 2314 LOperand* val; 2315 if (instr->field_representation().IsInteger8() || 2316 instr->field_representation().IsUInteger8()) { 2317 // mov_b requires a byte register (i.e. any of eax, ebx, ecx, edx). 2318 // Just force the value to be in eax and we're safe here. 2319 val = UseFixed(instr->value(), eax); 2320 } else if (needs_write_barrier) { 2321 val = UseTempRegister(instr->value()); 2322 } else if (can_be_constant) { 2323 val = UseRegisterOrConstant(instr->value()); 2324 } else if (instr->field_representation().IsDouble()) { 2325 val = UseRegisterAtStart(instr->value()); 2326 } else { 2327 val = UseRegister(instr->value()); 2328 } 2329 2330 // We only need a scratch register if we have a write barrier or we 2331 // have a store into the properties array (not in-object-property). 2332 LOperand* temp = (!is_in_object || needs_write_barrier || 2333 needs_write_barrier_for_map) ? TempRegister() : NULL; 2334 2335 // We need a temporary register for write barrier of the map field. 2336 LOperand* temp_map = needs_write_barrier_for_map ? TempRegister() : NULL; 2337 2338 return new(zone()) LStoreNamedField(obj, val, temp, temp_map); 2339 } 2340 2341 2342 LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) { 2343 LOperand* context = UseFixed(instr->context(), esi); 2344 LOperand* object = 2345 UseFixed(instr->object(), StoreDescriptor::ReceiverRegister()); 2346 LOperand* value = UseFixed(instr->value(), StoreDescriptor::ValueRegister()); 2347 LOperand* slot = FixedTemp(VectorStoreICDescriptor::SlotRegister()); 2348 LOperand* vector = FixedTemp(VectorStoreICDescriptor::VectorRegister()); 2349 2350 LStoreNamedGeneric* result = 2351 new (zone()) LStoreNamedGeneric(context, object, value, slot, vector); 2352 return MarkAsCall(result, instr); 2353 } 2354 2355 2356 LInstruction* LChunkBuilder::DoStringAdd(HStringAdd* instr) { 2357 LOperand* context = UseFixed(instr->context(), esi); 2358 LOperand* left = UseFixed(instr->left(), edx); 2359 LOperand* right = UseFixed(instr->right(), eax); 2360 LStringAdd* string_add = new(zone()) LStringAdd(context, left, right); 2361 return MarkAsCall(DefineFixed(string_add, eax), instr); 2362 } 2363 2364 2365 LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) { 2366 LOperand* string = UseTempRegister(instr->string()); 2367 LOperand* index = UseTempRegister(instr->index()); 2368 LOperand* context = UseAny(instr->context()); 2369 LStringCharCodeAt* result = 2370 new(zone()) LStringCharCodeAt(context, string, index); 2371 return AssignPointerMap(DefineAsRegister(result)); 2372 } 2373 2374 2375 LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) { 2376 LOperand* char_code = UseRegister(instr->value()); 2377 LOperand* context = UseAny(instr->context()); 2378 LStringCharFromCode* result = 2379 new(zone()) LStringCharFromCode(context, char_code); 2380 return AssignPointerMap(DefineAsRegister(result)); 2381 } 2382 2383 2384 LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) { 2385 LOperand* size = instr->size()->IsConstant() ? UseConstant(instr->size()) 2386 : UseRegister(instr->size()); 2387 if (instr->IsAllocationFolded()) { 2388 LOperand* temp = TempRegister(); 2389 LFastAllocate* result = new (zone()) LFastAllocate(size, temp); 2390 return DefineAsRegister(result); 2391 } else { 2392 info()->MarkAsDeferredCalling(); 2393 LOperand* context = UseAny(instr->context()); 2394 LOperand* temp = TempRegister(); 2395 LAllocate* result = new (zone()) LAllocate(context, size, temp); 2396 return AssignPointerMap(DefineAsRegister(result)); 2397 } 2398 } 2399 2400 2401 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) { 2402 DCHECK(argument_count_ == 0); 2403 allocator_->MarkAsOsrEntry(); 2404 current_block_->last_environment()->set_ast_id(instr->ast_id()); 2405 return AssignEnvironment(new(zone()) LOsrEntry); 2406 } 2407 2408 2409 LInstruction* LChunkBuilder::DoParameter(HParameter* instr) { 2410 LParameter* result = new(zone()) LParameter; 2411 if (instr->kind() == HParameter::STACK_PARAMETER) { 2412 int spill_index = chunk()->GetParameterStackSlot(instr->index()); 2413 return DefineAsSpilled(result, spill_index); 2414 } else { 2415 DCHECK(info()->IsStub()); 2416 CallInterfaceDescriptor descriptor = graph()->descriptor(); 2417 int index = static_cast<int>(instr->index()); 2418 Register reg = descriptor.GetRegisterParameter(index); 2419 return DefineFixed(result, reg); 2420 } 2421 } 2422 2423 2424 LInstruction* LChunkBuilder::DoUnknownOSRValue(HUnknownOSRValue* instr) { 2425 // Use an index that corresponds to the location in the unoptimized frame, 2426 // which the optimized frame will subsume. 2427 int env_index = instr->index(); 2428 int spill_index = 0; 2429 if (instr->environment()->is_parameter_index(env_index)) { 2430 spill_index = chunk()->GetParameterStackSlot(env_index); 2431 } else { 2432 spill_index = env_index - instr->environment()->first_local_index(); 2433 if (spill_index > LUnallocated::kMaxFixedSlotIndex) { 2434 Retry(kNotEnoughSpillSlotsForOsr); 2435 spill_index = 0; 2436 } 2437 spill_index += StandardFrameConstants::kFixedSlotCount; 2438 } 2439 return DefineAsSpilled(new(zone()) LUnknownOSRValue, spill_index); 2440 } 2441 2442 2443 LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) { 2444 // There are no real uses of the arguments object. 2445 // arguments.length and element access are supported directly on 2446 // stack arguments, and any real arguments object use causes a bailout. 2447 // So this value is never used. 2448 return NULL; 2449 } 2450 2451 2452 LInstruction* LChunkBuilder::DoCapturedObject(HCapturedObject* instr) { 2453 instr->ReplayEnvironment(current_block_->last_environment()); 2454 2455 // There are no real uses of a captured object. 2456 return NULL; 2457 } 2458 2459 2460 LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) { 2461 info()->MarkAsRequiresFrame(); 2462 LOperand* args = UseRegister(instr->arguments()); 2463 LOperand* length; 2464 LOperand* index; 2465 if (instr->length()->IsConstant() && instr->index()->IsConstant()) { 2466 length = UseRegisterOrConstant(instr->length()); 2467 index = UseOrConstant(instr->index()); 2468 } else { 2469 length = UseTempRegister(instr->length()); 2470 index = Use(instr->index()); 2471 } 2472 return DefineAsRegister(new(zone()) LAccessArgumentsAt(args, length, index)); 2473 } 2474 2475 2476 LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) { 2477 LOperand* context = UseFixed(instr->context(), esi); 2478 LOperand* value = UseFixed(instr->value(), ebx); 2479 LTypeof* result = new(zone()) LTypeof(context, value); 2480 return MarkAsCall(DefineFixed(result, eax), instr); 2481 } 2482 2483 2484 LInstruction* LChunkBuilder::DoTypeofIsAndBranch(HTypeofIsAndBranch* instr) { 2485 return new(zone()) LTypeofIsAndBranch(UseTempRegister(instr->value())); 2486 } 2487 2488 2489 LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) { 2490 instr->ReplayEnvironment(current_block_->last_environment()); 2491 return NULL; 2492 } 2493 2494 2495 LInstruction* LChunkBuilder::DoStackCheck(HStackCheck* instr) { 2496 info()->MarkAsDeferredCalling(); 2497 if (instr->is_function_entry()) { 2498 LOperand* context = UseFixed(instr->context(), esi); 2499 return MarkAsCall(new(zone()) LStackCheck(context), instr); 2500 } else { 2501 DCHECK(instr->is_backwards_branch()); 2502 LOperand* context = UseAny(instr->context()); 2503 return AssignEnvironment( 2504 AssignPointerMap(new(zone()) LStackCheck(context))); 2505 } 2506 } 2507 2508 2509 LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) { 2510 HEnvironment* outer = current_block_->last_environment(); 2511 outer->set_ast_id(instr->ReturnId()); 2512 HConstant* undefined = graph()->GetConstantUndefined(); 2513 HEnvironment* inner = outer->CopyForInlining( 2514 instr->closure(), instr->arguments_count(), instr->function(), undefined, 2515 instr->inlining_kind(), instr->syntactic_tail_call_mode()); 2516 // Only replay binding of arguments object if it wasn't removed from graph. 2517 if (instr->arguments_var() != NULL && instr->arguments_object()->IsLinked()) { 2518 inner->Bind(instr->arguments_var(), instr->arguments_object()); 2519 } 2520 inner->BindContext(instr->closure_context()); 2521 inner->set_entry(instr); 2522 current_block_->UpdateEnvironment(inner); 2523 chunk_->AddInlinedFunction(instr->shared()); 2524 return NULL; 2525 } 2526 2527 2528 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) { 2529 LInstruction* pop = NULL; 2530 2531 HEnvironment* env = current_block_->last_environment(); 2532 2533 if (env->entry()->arguments_pushed()) { 2534 int argument_count = env->arguments_environment()->parameter_count(); 2535 pop = new(zone()) LDrop(argument_count); 2536 DCHECK(instr->argument_delta() == -argument_count); 2537 } 2538 2539 HEnvironment* outer = current_block_->last_environment()-> 2540 DiscardInlined(false); 2541 current_block_->UpdateEnvironment(outer); 2542 return pop; 2543 } 2544 2545 2546 LInstruction* LChunkBuilder::DoForInPrepareMap(HForInPrepareMap* instr) { 2547 LOperand* context = UseFixed(instr->context(), esi); 2548 LOperand* object = UseFixed(instr->enumerable(), eax); 2549 LForInPrepareMap* result = new(zone()) LForInPrepareMap(context, object); 2550 return MarkAsCall(DefineFixed(result, eax), instr, CAN_DEOPTIMIZE_EAGERLY); 2551 } 2552 2553 2554 LInstruction* LChunkBuilder::DoForInCacheArray(HForInCacheArray* instr) { 2555 LOperand* map = UseRegister(instr->map()); 2556 return AssignEnvironment(DefineAsRegister( 2557 new(zone()) LForInCacheArray(map))); 2558 } 2559 2560 2561 LInstruction* LChunkBuilder::DoCheckMapValue(HCheckMapValue* instr) { 2562 LOperand* value = UseRegisterAtStart(instr->value()); 2563 LOperand* map = UseRegisterAtStart(instr->map()); 2564 return AssignEnvironment(new(zone()) LCheckMapValue(value, map)); 2565 } 2566 2567 2568 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) { 2569 LOperand* object = UseRegister(instr->object()); 2570 LOperand* index = UseTempRegister(instr->index()); 2571 LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index); 2572 LInstruction* result = DefineSameAsFirst(load); 2573 return AssignPointerMap(result); 2574 } 2575 2576 } // namespace internal 2577 } // namespace v8 2578 2579 #endif // V8_TARGET_ARCH_IA32 2580