1 // Copyright 2013 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/arm64/lithium-arm64.h"
6
7 #include <sstream>
8
9 #include "src/crankshaft/arm64/lithium-codegen-arm64.h"
10 #include "src/crankshaft/hydrogen-osr.h"
11 #include "src/crankshaft/lithium-inl.h"
12
13 namespace v8 {
14 namespace internal {
15
16 #define DEFINE_COMPILE(type) \
17 void L##type::CompileToNative(LCodeGen* generator) { \
18 generator->Do##type(this); \
19 }
LITHIUM_CONCRETE_INSTRUCTION_LIST(DEFINE_COMPILE)20 LITHIUM_CONCRETE_INSTRUCTION_LIST(DEFINE_COMPILE)
21 #undef DEFINE_COMPILE
22
23 #ifdef DEBUG
24 void LInstruction::VerifyCall() {
25 // Call instructions can use only fixed registers as temporaries and
26 // outputs because all registers are blocked by the calling convention.
27 // Inputs operands must use a fixed register or use-at-start policy or
28 // a non-register policy.
29 DCHECK(Output() == NULL ||
30 LUnallocated::cast(Output())->HasFixedPolicy() ||
31 !LUnallocated::cast(Output())->HasRegisterPolicy());
32 for (UseIterator it(this); !it.Done(); it.Advance()) {
33 LUnallocated* operand = LUnallocated::cast(it.Current());
34 DCHECK(operand->HasFixedPolicy() ||
35 operand->IsUsedAtStart());
36 }
37 for (TempIterator it(this); !it.Done(); it.Advance()) {
38 LUnallocated* operand = LUnallocated::cast(it.Current());
39 DCHECK(operand->HasFixedPolicy() ||!operand->HasRegisterPolicy());
40 }
41 }
42 #endif
43
44
PrintDataTo(StringStream * stream)45 void LLabel::PrintDataTo(StringStream* stream) {
46 LGap::PrintDataTo(stream);
47 LLabel* rep = replacement();
48 if (rep != NULL) {
49 stream->Add(" Dead block replaced with B%d", rep->block_id());
50 }
51 }
52
53
PrintDataTo(StringStream * stream)54 void LAccessArgumentsAt::PrintDataTo(StringStream* stream) {
55 arguments()->PrintTo(stream);
56 stream->Add(" length ");
57 length()->PrintTo(stream);
58 stream->Add(" index ");
59 index()->PrintTo(stream);
60 }
61
62
PrintDataTo(StringStream * stream)63 void LBranch::PrintDataTo(StringStream* stream) {
64 stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
65 value()->PrintTo(stream);
66 }
67
68
PrintDataTo(StringStream * stream)69 void LCallJSFunction::PrintDataTo(StringStream* stream) {
70 stream->Add("= ");
71 function()->PrintTo(stream);
72 stream->Add("#%d / ", arity());
73 }
74
75
PrintDataTo(StringStream * stream)76 void LCallWithDescriptor::PrintDataTo(StringStream* stream) {
77 for (int i = 0; i < InputCount(); i++) {
78 InputAt(i)->PrintTo(stream);
79 stream->Add(" ");
80 }
81 stream->Add("#%d / ", arity());
82 }
83
84
PrintDataTo(StringStream * stream)85 void LCallNewArray::PrintDataTo(StringStream* stream) {
86 stream->Add("= ");
87 constructor()->PrintTo(stream);
88 stream->Add(" #%d / ", arity());
89 ElementsKind kind = hydrogen()->elements_kind();
90 stream->Add(" (%s) ", ElementsKindToString(kind));
91 }
92
93
PrintDataTo(StringStream * stream)94 void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
95 stream->Add("if class_of_test(");
96 value()->PrintTo(stream);
97 stream->Add(", \"%o\") then B%d else B%d",
98 *hydrogen()->class_name(),
99 true_block_id(),
100 false_block_id());
101 }
102
103
PrintDataTo(StringStream * stream)104 void LCompareNumericAndBranch::PrintDataTo(StringStream* stream) {
105 stream->Add("if ");
106 left()->PrintTo(stream);
107 stream->Add(" %s ", Token::String(op()));
108 right()->PrintTo(stream);
109 stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
110 }
111
112
PrintDataTo(StringStream * stream)113 void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) {
114 stream->Add("if has_cached_array_index(");
115 value()->PrintTo(stream);
116 stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
117 }
118
119
HasInterestingComment(LCodeGen * gen) const120 bool LGoto::HasInterestingComment(LCodeGen* gen) const {
121 return !gen->IsNextEmittedBlock(block_id());
122 }
123
124
PrintDataTo(StringStream * stream)125 void LGoto::PrintDataTo(StringStream* stream) {
126 stream->Add("B%d", block_id());
127 }
128
129
PrintDataTo(StringStream * stream)130 void LInnerAllocatedObject::PrintDataTo(StringStream* stream) {
131 stream->Add(" = ");
132 base_object()->PrintTo(stream);
133 stream->Add(" + ");
134 offset()->PrintTo(stream);
135 }
136
137
PrintDataTo(StringStream * stream)138 void LCallFunction::PrintDataTo(StringStream* stream) {
139 context()->PrintTo(stream);
140 stream->Add(" ");
141 function()->PrintTo(stream);
142 if (hydrogen()->HasVectorAndSlot()) {
143 stream->Add(" (type-feedback-vector ");
144 temp_vector()->PrintTo(stream);
145 stream->Add(" ");
146 temp_slot()->PrintTo(stream);
147 stream->Add(")");
148 }
149 }
150
151
PrintDataTo(StringStream * stream)152 void LInvokeFunction::PrintDataTo(StringStream* stream) {
153 stream->Add("= ");
154 function()->PrintTo(stream);
155 stream->Add(" #%d / ", arity());
156 }
157
158
PrintTo(StringStream * stream)159 void LInstruction::PrintTo(StringStream* stream) {
160 stream->Add("%s ", this->Mnemonic());
161
162 PrintOutputOperandTo(stream);
163
164 PrintDataTo(stream);
165
166 if (HasEnvironment()) {
167 stream->Add(" ");
168 environment()->PrintTo(stream);
169 }
170
171 if (HasPointerMap()) {
172 stream->Add(" ");
173 pointer_map()->PrintTo(stream);
174 }
175 }
176
177
PrintDataTo(StringStream * stream)178 void LInstruction::PrintDataTo(StringStream* stream) {
179 stream->Add("= ");
180 for (int i = 0; i < InputCount(); i++) {
181 if (i > 0) stream->Add(" ");
182 if (InputAt(i) == NULL) {
183 stream->Add("NULL");
184 } else {
185 InputAt(i)->PrintTo(stream);
186 }
187 }
188 }
189
190
PrintOutputOperandTo(StringStream * stream)191 void LInstruction::PrintOutputOperandTo(StringStream* stream) {
192 if (HasResult()) result()->PrintTo(stream);
193 }
194
195
PrintDataTo(StringStream * stream)196 void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
197 stream->Add("if has_instance_type(");
198 value()->PrintTo(stream);
199 stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
200 }
201
202
PrintDataTo(StringStream * stream)203 void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
204 stream->Add("if is_string(");
205 value()->PrintTo(stream);
206 stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
207 }
208
209
PrintDataTo(StringStream * stream)210 void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
211 stream->Add("if is_smi(");
212 value()->PrintTo(stream);
213 stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
214 }
215
216
PrintDataTo(StringStream * stream)217 void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) {
218 stream->Add("if typeof ");
219 value()->PrintTo(stream);
220 stream->Add(" == \"%s\" then B%d else B%d",
221 hydrogen()->type_literal()->ToCString().get(),
222 true_block_id(), false_block_id());
223 }
224
225
PrintDataTo(StringStream * stream)226 void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) {
227 stream->Add("if is_undetectable(");
228 value()->PrintTo(stream);
229 stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
230 }
231
232
IsRedundant() const233 bool LGap::IsRedundant() const {
234 for (int i = 0; i < 4; i++) {
235 if ((parallel_moves_[i] != NULL) && !parallel_moves_[i]->IsRedundant()) {
236 return false;
237 }
238 }
239
240 return true;
241 }
242
243
PrintDataTo(StringStream * stream)244 void LGap::PrintDataTo(StringStream* stream) {
245 for (int i = 0; i < 4; i++) {
246 stream->Add("(");
247 if (parallel_moves_[i] != NULL) {
248 parallel_moves_[i]->PrintDataTo(stream);
249 }
250 stream->Add(") ");
251 }
252 }
253
254
PrintDataTo(StringStream * stream)255 void LLoadContextSlot::PrintDataTo(StringStream* stream) {
256 context()->PrintTo(stream);
257 stream->Add("[%d]", slot_index());
258 }
259
260
PrintDataTo(StringStream * stream)261 void LStoreCodeEntry::PrintDataTo(StringStream* stream) {
262 stream->Add(" = ");
263 function()->PrintTo(stream);
264 stream->Add(".code_entry = ");
265 code_object()->PrintTo(stream);
266 }
267
268
PrintDataTo(StringStream * stream)269 void LStoreContextSlot::PrintDataTo(StringStream* stream) {
270 context()->PrintTo(stream);
271 stream->Add("[%d] <- ", slot_index());
272 value()->PrintTo(stream);
273 }
274
275
PrintDataTo(StringStream * stream)276 void LStoreKeyedGeneric::PrintDataTo(StringStream* stream) {
277 object()->PrintTo(stream);
278 stream->Add("[");
279 key()->PrintTo(stream);
280 stream->Add("] <- ");
281 value()->PrintTo(stream);
282 }
283
284
PrintDataTo(StringStream * stream)285 void LStoreNamedField::PrintDataTo(StringStream* stream) {
286 object()->PrintTo(stream);
287 std::ostringstream os;
288 os << hydrogen()->access();
289 stream->Add(os.str().c_str());
290 stream->Add(" <- ");
291 value()->PrintTo(stream);
292 }
293
294
PrintDataTo(StringStream * stream)295 void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
296 object()->PrintTo(stream);
297 stream->Add(".");
298 stream->Add(String::cast(*name())->ToCString().get());
299 stream->Add(" <- ");
300 value()->PrintTo(stream);
301 }
302
303
PrintDataTo(StringStream * stream)304 void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
305 stream->Add("if string_compare(");
306 left()->PrintTo(stream);
307 right()->PrintTo(stream);
308 stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
309 }
310
311
PrintDataTo(StringStream * stream)312 void LTransitionElementsKind::PrintDataTo(StringStream* stream) {
313 object()->PrintTo(stream);
314 stream->Add("%p -> %p", *original_map(), *transitioned_map());
315 }
316
317
318 template<int T>
PrintDataTo(StringStream * stream)319 void LUnaryMathOperation<T>::PrintDataTo(StringStream* stream) {
320 value()->PrintTo(stream);
321 }
322
323
Mnemonic() const324 const char* LArithmeticD::Mnemonic() const {
325 switch (op()) {
326 case Token::ADD: return "add-d";
327 case Token::SUB: return "sub-d";
328 case Token::MUL: return "mul-d";
329 case Token::DIV: return "div-d";
330 case Token::MOD: return "mod-d";
331 default:
332 UNREACHABLE();
333 return NULL;
334 }
335 }
336
337
Mnemonic() const338 const char* LArithmeticT::Mnemonic() const {
339 switch (op()) {
340 case Token::ADD: return "add-t";
341 case Token::SUB: return "sub-t";
342 case Token::MUL: return "mul-t";
343 case Token::MOD: return "mod-t";
344 case Token::DIV: return "div-t";
345 case Token::BIT_AND: return "bit-and-t";
346 case Token::BIT_OR: return "bit-or-t";
347 case Token::BIT_XOR: return "bit-xor-t";
348 case Token::ROR: return "ror-t";
349 case Token::SHL: return "shl-t";
350 case Token::SAR: return "sar-t";
351 case Token::SHR: return "shr-t";
352 default:
353 UNREACHABLE();
354 return NULL;
355 }
356 }
357
358
ToUnallocated(Register reg)359 LUnallocated* LChunkBuilder::ToUnallocated(Register reg) {
360 return new (zone()) LUnallocated(LUnallocated::FIXED_REGISTER, reg.code());
361 }
362
363
ToUnallocated(DoubleRegister reg)364 LUnallocated* LChunkBuilder::ToUnallocated(DoubleRegister reg) {
365 return new (zone())
366 LUnallocated(LUnallocated::FIXED_DOUBLE_REGISTER, reg.code());
367 }
368
369
Use(HValue * value,LUnallocated * operand)370 LOperand* LChunkBuilder::Use(HValue* value, LUnallocated* operand) {
371 if (value->EmitAtUses()) {
372 HInstruction* instr = HInstruction::cast(value);
373 VisitInstruction(instr);
374 }
375 operand->set_virtual_register(value->id());
376 return operand;
377 }
378
379
UseFixed(HValue * value,Register fixed_register)380 LOperand* LChunkBuilder::UseFixed(HValue* value, Register fixed_register) {
381 return Use(value, ToUnallocated(fixed_register));
382 }
383
384
UseFixedDouble(HValue * value,DoubleRegister fixed_register)385 LOperand* LChunkBuilder::UseFixedDouble(HValue* value,
386 DoubleRegister fixed_register) {
387 return Use(value, ToUnallocated(fixed_register));
388 }
389
390
UseRegister(HValue * value)391 LOperand* LChunkBuilder::UseRegister(HValue* value) {
392 return Use(value, new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
393 }
394
395
UseRegisterAndClobber(HValue * value)396 LOperand* LChunkBuilder::UseRegisterAndClobber(HValue* value) {
397 return Use(value, new(zone()) LUnallocated(LUnallocated::WRITABLE_REGISTER));
398 }
399
400
UseRegisterAtStart(HValue * value)401 LOperand* LChunkBuilder::UseRegisterAtStart(HValue* value) {
402 return Use(value,
403 new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER,
404 LUnallocated::USED_AT_START));
405 }
406
407
UseRegisterOrConstant(HValue * value)408 LOperand* LChunkBuilder::UseRegisterOrConstant(HValue* value) {
409 return value->IsConstant() ? UseConstant(value) : UseRegister(value);
410 }
411
412
UseRegisterOrConstantAtStart(HValue * value)413 LOperand* LChunkBuilder::UseRegisterOrConstantAtStart(HValue* value) {
414 return value->IsConstant() ? UseConstant(value) : UseRegisterAtStart(value);
415 }
416
417
UseConstant(HValue * value)418 LConstantOperand* LChunkBuilder::UseConstant(HValue* value) {
419 return chunk_->DefineConstantOperand(HConstant::cast(value));
420 }
421
422
UseAny(HValue * value)423 LOperand* LChunkBuilder::UseAny(HValue* value) {
424 return value->IsConstant()
425 ? UseConstant(value)
426 : Use(value, new(zone()) LUnallocated(LUnallocated::ANY));
427 }
428
429
Define(LTemplateResultInstruction<1> * instr,LUnallocated * result)430 LInstruction* LChunkBuilder::Define(LTemplateResultInstruction<1>* instr,
431 LUnallocated* result) {
432 result->set_virtual_register(current_instruction_->id());
433 instr->set_result(result);
434 return instr;
435 }
436
437
DefineAsRegister(LTemplateResultInstruction<1> * instr)438 LInstruction* LChunkBuilder::DefineAsRegister(
439 LTemplateResultInstruction<1>* instr) {
440 return Define(instr,
441 new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
442 }
443
444
DefineAsSpilled(LTemplateResultInstruction<1> * instr,int index)445 LInstruction* LChunkBuilder::DefineAsSpilled(
446 LTemplateResultInstruction<1>* instr, int index) {
447 return Define(instr,
448 new(zone()) LUnallocated(LUnallocated::FIXED_SLOT, index));
449 }
450
451
DefineSameAsFirst(LTemplateResultInstruction<1> * instr)452 LInstruction* LChunkBuilder::DefineSameAsFirst(
453 LTemplateResultInstruction<1>* instr) {
454 return Define(instr,
455 new(zone()) LUnallocated(LUnallocated::SAME_AS_FIRST_INPUT));
456 }
457
458
DefineFixed(LTemplateResultInstruction<1> * instr,Register reg)459 LInstruction* LChunkBuilder::DefineFixed(
460 LTemplateResultInstruction<1>* instr, Register reg) {
461 return Define(instr, ToUnallocated(reg));
462 }
463
464
DefineFixedDouble(LTemplateResultInstruction<1> * instr,DoubleRegister reg)465 LInstruction* LChunkBuilder::DefineFixedDouble(
466 LTemplateResultInstruction<1>* instr, DoubleRegister reg) {
467 return Define(instr, ToUnallocated(reg));
468 }
469
470
MarkAsCall(LInstruction * instr,HInstruction * hinstr,CanDeoptimize can_deoptimize)471 LInstruction* LChunkBuilder::MarkAsCall(LInstruction* instr,
472 HInstruction* hinstr,
473 CanDeoptimize can_deoptimize) {
474 info()->MarkAsNonDeferredCalling();
475 #ifdef DEBUG
476 instr->VerifyCall();
477 #endif
478 instr->MarkAsCall();
479 instr = AssignPointerMap(instr);
480
481 // If instruction does not have side-effects lazy deoptimization
482 // after the call will try to deoptimize to the point before the call.
483 // Thus we still need to attach environment to this call even if
484 // call sequence can not deoptimize eagerly.
485 bool needs_environment =
486 (can_deoptimize == CAN_DEOPTIMIZE_EAGERLY) ||
487 !hinstr->HasObservableSideEffects();
488 if (needs_environment && !instr->HasEnvironment()) {
489 instr = AssignEnvironment(instr);
490 // We can't really figure out if the environment is needed or not.
491 instr->environment()->set_has_been_used();
492 }
493
494 return instr;
495 }
496
497
AssignPointerMap(LInstruction * instr)498 LInstruction* LChunkBuilder::AssignPointerMap(LInstruction* instr) {
499 DCHECK(!instr->HasPointerMap());
500 instr->set_pointer_map(new(zone()) LPointerMap(zone()));
501 return instr;
502 }
503
504
TempRegister()505 LUnallocated* LChunkBuilder::TempRegister() {
506 LUnallocated* operand =
507 new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER);
508 int vreg = allocator_->GetVirtualRegister();
509 if (!allocator_->AllocationOk()) {
510 Abort(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister);
511 vreg = 0;
512 }
513 operand->set_virtual_register(vreg);
514 return operand;
515 }
516
517
TempDoubleRegister()518 LUnallocated* LChunkBuilder::TempDoubleRegister() {
519 LUnallocated* operand =
520 new(zone()) LUnallocated(LUnallocated::MUST_HAVE_DOUBLE_REGISTER);
521 int vreg = allocator_->GetVirtualRegister();
522 if (!allocator_->AllocationOk()) {
523 Abort(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister);
524 vreg = 0;
525 }
526 operand->set_virtual_register(vreg);
527 return operand;
528 }
529
530
GetNextSpillIndex()531 int LPlatformChunk::GetNextSpillIndex() {
532 return spill_slot_count_++;
533 }
534
535
GetNextSpillSlot(RegisterKind kind)536 LOperand* LPlatformChunk::GetNextSpillSlot(RegisterKind kind) {
537 int index = GetNextSpillIndex();
538 if (kind == DOUBLE_REGISTERS) {
539 return LDoubleStackSlot::Create(index, zone());
540 } else {
541 DCHECK(kind == GENERAL_REGISTERS);
542 return LStackSlot::Create(index, zone());
543 }
544 }
545
546
FixedTemp(Register reg)547 LOperand* LChunkBuilder::FixedTemp(Register reg) {
548 LUnallocated* operand = ToUnallocated(reg);
549 DCHECK(operand->HasFixedPolicy());
550 return operand;
551 }
552
553
FixedTemp(DoubleRegister reg)554 LOperand* LChunkBuilder::FixedTemp(DoubleRegister reg) {
555 LUnallocated* operand = ToUnallocated(reg);
556 DCHECK(operand->HasFixedPolicy());
557 return operand;
558 }
559
560
Build()561 LPlatformChunk* LChunkBuilder::Build() {
562 DCHECK(is_unused());
563 chunk_ = new(zone()) LPlatformChunk(info_, graph_);
564 LPhase phase("L_Building chunk", chunk_);
565 status_ = BUILDING;
566
567 // If compiling for OSR, reserve space for the unoptimized frame,
568 // which will be subsumed into this frame.
569 if (graph()->has_osr()) {
570 // TODO(all): GetNextSpillIndex just increments a field. It has no other
571 // side effects, so we should get rid of this loop.
572 for (int i = graph()->osr()->UnoptimizedFrameSlots(); i > 0; i--) {
573 chunk_->GetNextSpillIndex();
574 }
575 }
576
577 const ZoneList<HBasicBlock*>* blocks = graph_->blocks();
578 for (int i = 0; i < blocks->length(); i++) {
579 DoBasicBlock(blocks->at(i));
580 if (is_aborted()) return NULL;
581 }
582 status_ = DONE;
583 return chunk_;
584 }
585
586
DoBasicBlock(HBasicBlock * block)587 void LChunkBuilder::DoBasicBlock(HBasicBlock* block) {
588 DCHECK(is_building());
589 current_block_ = block;
590
591 if (block->IsStartBlock()) {
592 block->UpdateEnvironment(graph_->start_environment());
593 argument_count_ = 0;
594 } else if (block->predecessors()->length() == 1) {
595 // We have a single predecessor => copy environment and outgoing
596 // argument count from the predecessor.
597 DCHECK(block->phis()->length() == 0);
598 HBasicBlock* pred = block->predecessors()->at(0);
599 HEnvironment* last_environment = pred->last_environment();
600 DCHECK(last_environment != NULL);
601
602 // Only copy the environment, if it is later used again.
603 if (pred->end()->SecondSuccessor() == NULL) {
604 DCHECK(pred->end()->FirstSuccessor() == block);
605 } else {
606 if ((pred->end()->FirstSuccessor()->block_id() > block->block_id()) ||
607 (pred->end()->SecondSuccessor()->block_id() > block->block_id())) {
608 last_environment = last_environment->Copy();
609 }
610 }
611 block->UpdateEnvironment(last_environment);
612 DCHECK(pred->argument_count() >= 0);
613 argument_count_ = pred->argument_count();
614 } else {
615 // We are at a state join => process phis.
616 HBasicBlock* pred = block->predecessors()->at(0);
617 // No need to copy the environment, it cannot be used later.
618 HEnvironment* last_environment = pred->last_environment();
619 for (int i = 0; i < block->phis()->length(); ++i) {
620 HPhi* phi = block->phis()->at(i);
621 if (phi->HasMergedIndex()) {
622 last_environment->SetValueAt(phi->merged_index(), phi);
623 }
624 }
625 for (int i = 0; i < block->deleted_phis()->length(); ++i) {
626 if (block->deleted_phis()->at(i) < last_environment->length()) {
627 last_environment->SetValueAt(block->deleted_phis()->at(i),
628 graph_->GetConstantUndefined());
629 }
630 }
631 block->UpdateEnvironment(last_environment);
632 // Pick up the outgoing argument count of one of the predecessors.
633 argument_count_ = pred->argument_count();
634 }
635
636 // Translate hydrogen instructions to lithium ones for the current block.
637 HInstruction* current = block->first();
638 int start = chunk_->instructions()->length();
639 while ((current != NULL) && !is_aborted()) {
640 // Code for constants in registers is generated lazily.
641 if (!current->EmitAtUses()) {
642 VisitInstruction(current);
643 }
644 current = current->next();
645 }
646 int end = chunk_->instructions()->length() - 1;
647 if (end >= start) {
648 block->set_first_instruction_index(start);
649 block->set_last_instruction_index(end);
650 }
651 block->set_argument_count(argument_count_);
652 current_block_ = NULL;
653 }
654
655
VisitInstruction(HInstruction * current)656 void LChunkBuilder::VisitInstruction(HInstruction* current) {
657 HInstruction* old_current = current_instruction_;
658 current_instruction_ = current;
659
660 LInstruction* instr = NULL;
661 if (current->CanReplaceWithDummyUses()) {
662 if (current->OperandCount() == 0) {
663 instr = DefineAsRegister(new(zone()) LDummy());
664 } else {
665 DCHECK(!current->OperandAt(0)->IsControlInstruction());
666 instr = DefineAsRegister(new(zone())
667 LDummyUse(UseAny(current->OperandAt(0))));
668 }
669 for (int i = 1; i < current->OperandCount(); ++i) {
670 if (current->OperandAt(i)->IsControlInstruction()) continue;
671 LInstruction* dummy =
672 new(zone()) LDummyUse(UseAny(current->OperandAt(i)));
673 dummy->set_hydrogen_value(current);
674 chunk_->AddInstruction(dummy, current_block_);
675 }
676 } else {
677 HBasicBlock* successor;
678 if (current->IsControlInstruction() &&
679 HControlInstruction::cast(current)->KnownSuccessorBlock(&successor) &&
680 successor != NULL) {
681 instr = new(zone()) LGoto(successor);
682 } else {
683 instr = current->CompileToLithium(this);
684 }
685 }
686
687 argument_count_ += current->argument_delta();
688 DCHECK(argument_count_ >= 0);
689
690 if (instr != NULL) {
691 AddInstruction(instr, current);
692 }
693
694 current_instruction_ = old_current;
695 }
696
697
AddInstruction(LInstruction * instr,HInstruction * hydrogen_val)698 void LChunkBuilder::AddInstruction(LInstruction* instr,
699 HInstruction* hydrogen_val) {
700 // Associate the hydrogen instruction first, since we may need it for
701 // the ClobbersRegisters() or ClobbersDoubleRegisters() calls below.
702 instr->set_hydrogen_value(hydrogen_val);
703
704 #if DEBUG
705 // Make sure that the lithium instruction has either no fixed register
706 // constraints in temps or the result OR no uses that are only used at
707 // start. If this invariant doesn't hold, the register allocator can decide
708 // to insert a split of a range immediately before the instruction due to an
709 // already allocated register needing to be used for the instruction's fixed
710 // register constraint. In this case, the register allocator won't see an
711 // interference between the split child and the use-at-start (it would if
712 // the it was just a plain use), so it is free to move the split child into
713 // the same register that is used for the use-at-start.
714 // See https://code.google.com/p/chromium/issues/detail?id=201590
715 if (!(instr->ClobbersRegisters() &&
716 instr->ClobbersDoubleRegisters(isolate()))) {
717 int fixed = 0;
718 int used_at_start = 0;
719 for (UseIterator it(instr); !it.Done(); it.Advance()) {
720 LUnallocated* operand = LUnallocated::cast(it.Current());
721 if (operand->IsUsedAtStart()) ++used_at_start;
722 }
723 if (instr->Output() != NULL) {
724 if (LUnallocated::cast(instr->Output())->HasFixedPolicy()) ++fixed;
725 }
726 for (TempIterator it(instr); !it.Done(); it.Advance()) {
727 LUnallocated* operand = LUnallocated::cast(it.Current());
728 if (operand->HasFixedPolicy()) ++fixed;
729 }
730 DCHECK(fixed == 0 || used_at_start == 0);
731 }
732 #endif
733
734 if (FLAG_stress_pointer_maps && !instr->HasPointerMap()) {
735 instr = AssignPointerMap(instr);
736 }
737 if (FLAG_stress_environments && !instr->HasEnvironment()) {
738 instr = AssignEnvironment(instr);
739 }
740 chunk_->AddInstruction(instr, current_block_);
741
742 if (instr->IsCall() || instr->IsPrologue()) {
743 HValue* hydrogen_value_for_lazy_bailout = hydrogen_val;
744 if (hydrogen_val->HasObservableSideEffects()) {
745 HSimulate* sim = HSimulate::cast(hydrogen_val->next());
746 sim->ReplayEnvironment(current_block_->last_environment());
747 hydrogen_value_for_lazy_bailout = sim;
748 }
749 LInstruction* bailout = AssignEnvironment(new(zone()) LLazyBailout());
750 bailout->set_hydrogen_value(hydrogen_value_for_lazy_bailout);
751 chunk_->AddInstruction(bailout, current_block_);
752 }
753 }
754
755
AssignEnvironment(LInstruction * instr)756 LInstruction* LChunkBuilder::AssignEnvironment(LInstruction* instr) {
757 HEnvironment* hydrogen_env = current_block_->last_environment();
758 int argument_index_accumulator = 0;
759 ZoneList<HValue*> objects_to_materialize(0, zone());
760 instr->set_environment(CreateEnvironment(hydrogen_env,
761 &argument_index_accumulator,
762 &objects_to_materialize));
763 return instr;
764 }
765
766
DoPrologue(HPrologue * instr)767 LInstruction* LChunkBuilder::DoPrologue(HPrologue* instr) {
768 return new (zone()) LPrologue();
769 }
770
771
DoAbnormalExit(HAbnormalExit * instr)772 LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) {
773 // The control instruction marking the end of a block that completed
774 // abruptly (e.g., threw an exception). There is nothing specific to do.
775 return NULL;
776 }
777
778
DoArithmeticD(Token::Value op,HArithmeticBinaryOperation * instr)779 LInstruction* LChunkBuilder::DoArithmeticD(Token::Value op,
780 HArithmeticBinaryOperation* instr) {
781 DCHECK(instr->representation().IsDouble());
782 DCHECK(instr->left()->representation().IsDouble());
783 DCHECK(instr->right()->representation().IsDouble());
784
785 if (op == Token::MOD) {
786 LOperand* left = UseFixedDouble(instr->left(), d0);
787 LOperand* right = UseFixedDouble(instr->right(), d1);
788 LArithmeticD* result = new(zone()) LArithmeticD(Token::MOD, left, right);
789 return MarkAsCall(DefineFixedDouble(result, d0), instr);
790 } else {
791 LOperand* left = UseRegisterAtStart(instr->left());
792 LOperand* right = UseRegisterAtStart(instr->right());
793 LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
794 return DefineAsRegister(result);
795 }
796 }
797
798
DoArithmeticT(Token::Value op,HBinaryOperation * instr)799 LInstruction* LChunkBuilder::DoArithmeticT(Token::Value op,
800 HBinaryOperation* instr) {
801 DCHECK((op == Token::ADD) || (op == Token::SUB) || (op == Token::MUL) ||
802 (op == Token::DIV) || (op == Token::MOD) || (op == Token::SHR) ||
803 (op == Token::SHL) || (op == Token::SAR) || (op == Token::ROR) ||
804 (op == Token::BIT_OR) || (op == Token::BIT_AND) ||
805 (op == Token::BIT_XOR));
806 HValue* left = instr->left();
807 HValue* right = instr->right();
808
809 // TODO(jbramley): Once we've implemented smi support for all arithmetic
810 // operations, these assertions should check IsTagged().
811 DCHECK(instr->representation().IsSmiOrTagged());
812 DCHECK(left->representation().IsSmiOrTagged());
813 DCHECK(right->representation().IsSmiOrTagged());
814
815 LOperand* context = UseFixed(instr->context(), cp);
816 LOperand* left_operand = UseFixed(left, x1);
817 LOperand* right_operand = UseFixed(right, x0);
818 LArithmeticT* result =
819 new(zone()) LArithmeticT(op, context, left_operand, right_operand);
820 return MarkAsCall(DefineFixed(result, x0), instr);
821 }
822
823
DoBoundsCheckBaseIndexInformation(HBoundsCheckBaseIndexInformation * instr)824 LInstruction* LChunkBuilder::DoBoundsCheckBaseIndexInformation(
825 HBoundsCheckBaseIndexInformation* instr) {
826 UNREACHABLE();
827 return NULL;
828 }
829
830
DoAccessArgumentsAt(HAccessArgumentsAt * instr)831 LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
832 info()->MarkAsRequiresFrame();
833 LOperand* args = NULL;
834 LOperand* length = NULL;
835 LOperand* index = NULL;
836
837 if (instr->length()->IsConstant() && instr->index()->IsConstant()) {
838 args = UseRegisterAtStart(instr->arguments());
839 length = UseConstant(instr->length());
840 index = UseConstant(instr->index());
841 } else {
842 args = UseRegister(instr->arguments());
843 length = UseRegisterAtStart(instr->length());
844 index = UseRegisterOrConstantAtStart(instr->index());
845 }
846
847 return DefineAsRegister(new(zone()) LAccessArgumentsAt(args, length, index));
848 }
849
850
DoAdd(HAdd * instr)851 LInstruction* LChunkBuilder::DoAdd(HAdd* instr) {
852 if (instr->representation().IsSmiOrInteger32()) {
853 DCHECK(instr->left()->representation().Equals(instr->representation()));
854 DCHECK(instr->right()->representation().Equals(instr->representation()));
855
856 LInstruction* shifted_operation = TryDoOpWithShiftedRightOperand(instr);
857 if (shifted_operation != NULL) {
858 return shifted_operation;
859 }
860
861 LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
862 LOperand* right =
863 UseRegisterOrConstantAtStart(instr->BetterRightOperand());
864 LInstruction* result = instr->representation().IsSmi() ?
865 DefineAsRegister(new(zone()) LAddS(left, right)) :
866 DefineAsRegister(new(zone()) LAddI(left, right));
867 if (instr->CheckFlag(HValue::kCanOverflow)) {
868 result = AssignEnvironment(result);
869 }
870 return result;
871 } else if (instr->representation().IsExternal()) {
872 DCHECK(instr->IsConsistentExternalRepresentation());
873 DCHECK(!instr->CheckFlag(HValue::kCanOverflow));
874 LOperand* left = UseRegisterAtStart(instr->left());
875 LOperand* right = UseRegisterOrConstantAtStart(instr->right());
876 return DefineAsRegister(new(zone()) LAddE(left, right));
877 } else if (instr->representation().IsDouble()) {
878 return DoArithmeticD(Token::ADD, instr);
879 } else {
880 DCHECK(instr->representation().IsTagged());
881 return DoArithmeticT(Token::ADD, instr);
882 }
883 }
884
885
DoAllocate(HAllocate * instr)886 LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) {
887 info()->MarkAsDeferredCalling();
888 LOperand* context = UseAny(instr->context());
889 LOperand* size = UseRegisterOrConstant(instr->size());
890 LOperand* temp1 = TempRegister();
891 LOperand* temp2 = TempRegister();
892 LOperand* temp3 = instr->MustPrefillWithFiller() ? TempRegister() : NULL;
893 LAllocate* result = new(zone()) LAllocate(context, size, temp1, temp2, temp3);
894 return AssignPointerMap(DefineAsRegister(result));
895 }
896
897
DoApplyArguments(HApplyArguments * instr)898 LInstruction* LChunkBuilder::DoApplyArguments(HApplyArguments* instr) {
899 LOperand* function = UseFixed(instr->function(), x1);
900 LOperand* receiver = UseFixed(instr->receiver(), x0);
901 LOperand* length = UseFixed(instr->length(), x2);
902 LOperand* elements = UseFixed(instr->elements(), x3);
903 LApplyArguments* result = new(zone()) LApplyArguments(function,
904 receiver,
905 length,
906 elements);
907 return MarkAsCall(DefineFixed(result, x0), instr, CAN_DEOPTIMIZE_EAGERLY);
908 }
909
910
DoArgumentsElements(HArgumentsElements * instr)911 LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* instr) {
912 info()->MarkAsRequiresFrame();
913 LOperand* temp = instr->from_inlined() ? NULL : TempRegister();
914 return DefineAsRegister(new(zone()) LArgumentsElements(temp));
915 }
916
917
DoArgumentsLength(HArgumentsLength * instr)918 LInstruction* LChunkBuilder::DoArgumentsLength(HArgumentsLength* instr) {
919 info()->MarkAsRequiresFrame();
920 LOperand* value = UseRegisterAtStart(instr->value());
921 return DefineAsRegister(new(zone()) LArgumentsLength(value));
922 }
923
924
DoArgumentsObject(HArgumentsObject * instr)925 LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
926 // There are no real uses of the arguments object.
927 // arguments.length and element access are supported directly on
928 // stack arguments, and any real arguments object use causes a bailout.
929 // So this value is never used.
930 return NULL;
931 }
932
933
DoBitwise(HBitwise * instr)934 LInstruction* LChunkBuilder::DoBitwise(HBitwise* instr) {
935 if (instr->representation().IsSmiOrInteger32()) {
936 DCHECK(instr->left()->representation().Equals(instr->representation()));
937 DCHECK(instr->right()->representation().Equals(instr->representation()));
938 DCHECK(instr->CheckFlag(HValue::kTruncatingToInt32));
939
940 LInstruction* shifted_operation = TryDoOpWithShiftedRightOperand(instr);
941 if (shifted_operation != NULL) {
942 return shifted_operation;
943 }
944
945 LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
946 LOperand* right =
947 UseRegisterOrConstantAtStart(instr->BetterRightOperand());
948 return instr->representation().IsSmi() ?
949 DefineAsRegister(new(zone()) LBitS(left, right)) :
950 DefineAsRegister(new(zone()) LBitI(left, right));
951 } else {
952 return DoArithmeticT(instr->op(), instr);
953 }
954 }
955
956
DoBlockEntry(HBlockEntry * instr)957 LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) {
958 // V8 expects a label to be generated for each basic block.
959 // This is used in some places like LAllocator::IsBlockBoundary
960 // in lithium-allocator.cc
961 return new(zone()) LLabel(instr->block());
962 }
963
964
DoBoundsCheck(HBoundsCheck * instr)965 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
966 if (!FLAG_debug_code && instr->skip_check()) return NULL;
967 LOperand* index = UseRegisterOrConstantAtStart(instr->index());
968 LOperand* length = !index->IsConstantOperand()
969 ? UseRegisterOrConstantAtStart(instr->length())
970 : UseRegisterAtStart(instr->length());
971 LInstruction* result = new(zone()) LBoundsCheck(index, length);
972 if (!FLAG_debug_code || !instr->skip_check()) {
973 result = AssignEnvironment(result);
974 }
975 return result;
976 }
977
978
DoBranch(HBranch * instr)979 LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
980 HValue* value = instr->value();
981 Representation r = value->representation();
982 HType type = value->type();
983
984 if (r.IsInteger32() || r.IsSmi() || r.IsDouble()) {
985 // These representations have simple checks that cannot deoptimize.
986 return new(zone()) LBranch(UseRegister(value), NULL, NULL);
987 } else {
988 DCHECK(r.IsTagged());
989 if (type.IsBoolean() || type.IsSmi() || type.IsJSArray() ||
990 type.IsHeapNumber()) {
991 // These types have simple checks that cannot deoptimize.
992 return new(zone()) LBranch(UseRegister(value), NULL, NULL);
993 }
994
995 if (type.IsString()) {
996 // This type cannot deoptimize, but needs a scratch register.
997 return new(zone()) LBranch(UseRegister(value), TempRegister(), NULL);
998 }
999
1000 ToBooleanStub::Types expected = instr->expected_input_types();
1001 bool needs_temps = expected.NeedsMap() || expected.IsEmpty();
1002 LOperand* temp1 = needs_temps ? TempRegister() : NULL;
1003 LOperand* temp2 = needs_temps ? TempRegister() : NULL;
1004
1005 if (expected.IsGeneric() || expected.IsEmpty()) {
1006 // The generic case cannot deoptimize because it already supports every
1007 // possible input type.
1008 DCHECK(needs_temps);
1009 return new(zone()) LBranch(UseRegister(value), temp1, temp2);
1010 } else {
1011 return AssignEnvironment(
1012 new(zone()) LBranch(UseRegister(value), temp1, temp2));
1013 }
1014 }
1015 }
1016
1017
DoCallJSFunction(HCallJSFunction * instr)1018 LInstruction* LChunkBuilder::DoCallJSFunction(
1019 HCallJSFunction* instr) {
1020 LOperand* function = UseFixed(instr->function(), x1);
1021
1022 LCallJSFunction* result = new(zone()) LCallJSFunction(function);
1023
1024 return MarkAsCall(DefineFixed(result, x0), instr);
1025 }
1026
1027
DoCallWithDescriptor(HCallWithDescriptor * instr)1028 LInstruction* LChunkBuilder::DoCallWithDescriptor(
1029 HCallWithDescriptor* instr) {
1030 CallInterfaceDescriptor descriptor = instr->descriptor();
1031
1032 LOperand* target = UseRegisterOrConstantAtStart(instr->target());
1033 ZoneList<LOperand*> ops(instr->OperandCount(), zone());
1034 // Target
1035 ops.Add(target, zone());
1036 // Context
1037 LOperand* op = UseFixed(instr->OperandAt(1), cp);
1038 ops.Add(op, zone());
1039 // Other register parameters
1040 for (int i = LCallWithDescriptor::kImplicitRegisterParameterCount;
1041 i < instr->OperandCount(); i++) {
1042 op =
1043 UseFixed(instr->OperandAt(i),
1044 descriptor.GetRegisterParameter(
1045 i - LCallWithDescriptor::kImplicitRegisterParameterCount));
1046 ops.Add(op, zone());
1047 }
1048
1049 LCallWithDescriptor* result = new(zone()) LCallWithDescriptor(descriptor,
1050 ops,
1051 zone());
1052 return MarkAsCall(DefineFixed(result, x0), instr);
1053 }
1054
1055
DoCallFunction(HCallFunction * instr)1056 LInstruction* LChunkBuilder::DoCallFunction(HCallFunction* instr) {
1057 LOperand* context = UseFixed(instr->context(), cp);
1058 LOperand* function = UseFixed(instr->function(), x1);
1059 LOperand* slot = NULL;
1060 LOperand* vector = NULL;
1061 if (instr->HasVectorAndSlot()) {
1062 slot = FixedTemp(x3);
1063 vector = FixedTemp(x2);
1064 }
1065
1066 LCallFunction* call =
1067 new (zone()) LCallFunction(context, function, slot, vector);
1068 return MarkAsCall(DefineFixed(call, x0), instr);
1069 }
1070
1071
DoCallNewArray(HCallNewArray * instr)1072 LInstruction* LChunkBuilder::DoCallNewArray(HCallNewArray* instr) {
1073 LOperand* context = UseFixed(instr->context(), cp);
1074 // The call to ArrayConstructCode will expect the constructor to be in x1.
1075 LOperand* constructor = UseFixed(instr->constructor(), x1);
1076 LCallNewArray* result = new(zone()) LCallNewArray(context, constructor);
1077 return MarkAsCall(DefineFixed(result, x0), instr);
1078 }
1079
1080
DoCallRuntime(HCallRuntime * instr)1081 LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
1082 LOperand* context = UseFixed(instr->context(), cp);
1083 return MarkAsCall(DefineFixed(new(zone()) LCallRuntime(context), x0), instr);
1084 }
1085
1086
DoCallStub(HCallStub * instr)1087 LInstruction* LChunkBuilder::DoCallStub(HCallStub* instr) {
1088 LOperand* context = UseFixed(instr->context(), cp);
1089 return MarkAsCall(DefineFixed(new(zone()) LCallStub(context), x0), instr);
1090 }
1091
1092
DoCapturedObject(HCapturedObject * instr)1093 LInstruction* LChunkBuilder::DoCapturedObject(HCapturedObject* instr) {
1094 instr->ReplayEnvironment(current_block_->last_environment());
1095
1096 // There are no real uses of a captured object.
1097 return NULL;
1098 }
1099
1100
DoChange(HChange * instr)1101 LInstruction* LChunkBuilder::DoChange(HChange* instr) {
1102 Representation from = instr->from();
1103 Representation to = instr->to();
1104 HValue* val = instr->value();
1105 if (from.IsSmi()) {
1106 if (to.IsTagged()) {
1107 LOperand* value = UseRegister(val);
1108 return DefineSameAsFirst(new(zone()) LDummyUse(value));
1109 }
1110 from = Representation::Tagged();
1111 }
1112 if (from.IsTagged()) {
1113 if (to.IsDouble()) {
1114 LOperand* value = UseRegister(val);
1115 LOperand* temp = TempRegister();
1116 LInstruction* result =
1117 DefineAsRegister(new(zone()) LNumberUntagD(value, temp));
1118 if (!val->representation().IsSmi()) result = AssignEnvironment(result);
1119 return result;
1120 } else if (to.IsSmi()) {
1121 LOperand* value = UseRegister(val);
1122 if (val->type().IsSmi()) {
1123 return DefineSameAsFirst(new(zone()) LDummyUse(value));
1124 }
1125 return AssignEnvironment(DefineSameAsFirst(new(zone()) LCheckSmi(value)));
1126 } else {
1127 DCHECK(to.IsInteger32());
1128 if (val->type().IsSmi() || val->representation().IsSmi()) {
1129 LOperand* value = UseRegisterAtStart(val);
1130 return DefineAsRegister(new(zone()) LSmiUntag(value, false));
1131 } else {
1132 LOperand* value = UseRegister(val);
1133 LOperand* temp1 = TempRegister();
1134 LOperand* temp2 = instr->CanTruncateToInt32()
1135 ? NULL : TempDoubleRegister();
1136 LInstruction* result =
1137 DefineAsRegister(new(zone()) LTaggedToI(value, temp1, temp2));
1138 if (!val->representation().IsSmi()) result = AssignEnvironment(result);
1139 return result;
1140 }
1141 }
1142 } else if (from.IsDouble()) {
1143 if (to.IsTagged()) {
1144 info()->MarkAsDeferredCalling();
1145 LOperand* value = UseRegister(val);
1146 LOperand* temp1 = TempRegister();
1147 LOperand* temp2 = TempRegister();
1148 LNumberTagD* result = new(zone()) LNumberTagD(value, temp1, temp2);
1149 return AssignPointerMap(DefineAsRegister(result));
1150 } else {
1151 DCHECK(to.IsSmi() || to.IsInteger32());
1152 if (instr->CanTruncateToInt32()) {
1153 LOperand* value = UseRegister(val);
1154 return DefineAsRegister(new(zone()) LTruncateDoubleToIntOrSmi(value));
1155 } else {
1156 LOperand* value = UseRegister(val);
1157 LDoubleToIntOrSmi* result = new(zone()) LDoubleToIntOrSmi(value);
1158 return AssignEnvironment(DefineAsRegister(result));
1159 }
1160 }
1161 } else if (from.IsInteger32()) {
1162 info()->MarkAsDeferredCalling();
1163 if (to.IsTagged()) {
1164 if (val->CheckFlag(HInstruction::kUint32)) {
1165 LOperand* value = UseRegister(val);
1166 LNumberTagU* result =
1167 new(zone()) LNumberTagU(value, TempRegister(), TempRegister());
1168 return AssignPointerMap(DefineAsRegister(result));
1169 } else {
1170 STATIC_ASSERT((kMinInt == Smi::kMinValue) &&
1171 (kMaxInt == Smi::kMaxValue));
1172 LOperand* value = UseRegisterAtStart(val);
1173 return DefineAsRegister(new(zone()) LSmiTag(value));
1174 }
1175 } else if (to.IsSmi()) {
1176 LOperand* value = UseRegisterAtStart(val);
1177 LInstruction* result = DefineAsRegister(new(zone()) LSmiTag(value));
1178 if (instr->CheckFlag(HValue::kCanOverflow)) {
1179 result = AssignEnvironment(result);
1180 }
1181 return result;
1182 } else {
1183 DCHECK(to.IsDouble());
1184 if (val->CheckFlag(HInstruction::kUint32)) {
1185 return DefineAsRegister(
1186 new(zone()) LUint32ToDouble(UseRegisterAtStart(val)));
1187 } else {
1188 return DefineAsRegister(
1189 new(zone()) LInteger32ToDouble(UseRegisterAtStart(val)));
1190 }
1191 }
1192 }
1193 UNREACHABLE();
1194 return NULL;
1195 }
1196
1197
DoCheckValue(HCheckValue * instr)1198 LInstruction* LChunkBuilder::DoCheckValue(HCheckValue* instr) {
1199 LOperand* value = UseRegisterAtStart(instr->value());
1200 return AssignEnvironment(new(zone()) LCheckValue(value));
1201 }
1202
1203
DoCheckArrayBufferNotNeutered(HCheckArrayBufferNotNeutered * instr)1204 LInstruction* LChunkBuilder::DoCheckArrayBufferNotNeutered(
1205 HCheckArrayBufferNotNeutered* instr) {
1206 LOperand* view = UseRegisterAtStart(instr->value());
1207 LCheckArrayBufferNotNeutered* result =
1208 new (zone()) LCheckArrayBufferNotNeutered(view);
1209 return AssignEnvironment(result);
1210 }
1211
1212
DoCheckInstanceType(HCheckInstanceType * instr)1213 LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
1214 LOperand* value = UseRegisterAtStart(instr->value());
1215 LOperand* temp = TempRegister();
1216 LInstruction* result = new(zone()) LCheckInstanceType(value, temp);
1217 return AssignEnvironment(result);
1218 }
1219
1220
DoCheckMaps(HCheckMaps * instr)1221 LInstruction* LChunkBuilder::DoCheckMaps(HCheckMaps* instr) {
1222 if (instr->IsStabilityCheck()) return new(zone()) LCheckMaps;
1223 LOperand* value = UseRegisterAtStart(instr->value());
1224 LOperand* temp = TempRegister();
1225 LInstruction* result = AssignEnvironment(new(zone()) LCheckMaps(value, temp));
1226 if (instr->HasMigrationTarget()) {
1227 info()->MarkAsDeferredCalling();
1228 result = AssignPointerMap(result);
1229 }
1230 return result;
1231 }
1232
1233
DoCheckHeapObject(HCheckHeapObject * instr)1234 LInstruction* LChunkBuilder::DoCheckHeapObject(HCheckHeapObject* instr) {
1235 LOperand* value = UseRegisterAtStart(instr->value());
1236 LInstruction* result = new(zone()) LCheckNonSmi(value);
1237 if (!instr->value()->type().IsHeapObject()) {
1238 result = AssignEnvironment(result);
1239 }
1240 return result;
1241 }
1242
1243
DoCheckSmi(HCheckSmi * instr)1244 LInstruction* LChunkBuilder::DoCheckSmi(HCheckSmi* instr) {
1245 LOperand* value = UseRegisterAtStart(instr->value());
1246 return AssignEnvironment(new(zone()) LCheckSmi(value));
1247 }
1248
1249
DoClampToUint8(HClampToUint8 * instr)1250 LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) {
1251 HValue* value = instr->value();
1252 Representation input_rep = value->representation();
1253 LOperand* reg = UseRegister(value);
1254 if (input_rep.IsDouble()) {
1255 return DefineAsRegister(new(zone()) LClampDToUint8(reg));
1256 } else if (input_rep.IsInteger32()) {
1257 return DefineAsRegister(new(zone()) LClampIToUint8(reg));
1258 } else {
1259 DCHECK(input_rep.IsSmiOrTagged());
1260 return AssignEnvironment(
1261 DefineAsRegister(new(zone()) LClampTToUint8(reg,
1262 TempDoubleRegister())));
1263 }
1264 }
1265
1266
DoClassOfTestAndBranch(HClassOfTestAndBranch * instr)1267 LInstruction* LChunkBuilder::DoClassOfTestAndBranch(
1268 HClassOfTestAndBranch* instr) {
1269 DCHECK(instr->value()->representation().IsTagged());
1270 LOperand* value = UseRegisterAtStart(instr->value());
1271 return new(zone()) LClassOfTestAndBranch(value,
1272 TempRegister(),
1273 TempRegister());
1274 }
1275
1276
DoCompareNumericAndBranch(HCompareNumericAndBranch * instr)1277 LInstruction* LChunkBuilder::DoCompareNumericAndBranch(
1278 HCompareNumericAndBranch* instr) {
1279 Representation r = instr->representation();
1280 if (r.IsSmiOrInteger32()) {
1281 DCHECK(instr->left()->representation().Equals(r));
1282 DCHECK(instr->right()->representation().Equals(r));
1283 LOperand* left = UseRegisterOrConstantAtStart(instr->left());
1284 LOperand* right = UseRegisterOrConstantAtStart(instr->right());
1285 return new(zone()) LCompareNumericAndBranch(left, right);
1286 } else {
1287 DCHECK(r.IsDouble());
1288 DCHECK(instr->left()->representation().IsDouble());
1289 DCHECK(instr->right()->representation().IsDouble());
1290 if (instr->left()->IsConstant() && instr->right()->IsConstant()) {
1291 LOperand* left = UseConstant(instr->left());
1292 LOperand* right = UseConstant(instr->right());
1293 return new(zone()) LCompareNumericAndBranch(left, right);
1294 }
1295 LOperand* left = UseRegisterAtStart(instr->left());
1296 LOperand* right = UseRegisterAtStart(instr->right());
1297 return new(zone()) LCompareNumericAndBranch(left, right);
1298 }
1299 }
1300
1301
DoCompareGeneric(HCompareGeneric * instr)1302 LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
1303 DCHECK(instr->left()->representation().IsTagged());
1304 DCHECK(instr->right()->representation().IsTagged());
1305 LOperand* context = UseFixed(instr->context(), cp);
1306 LOperand* left = UseFixed(instr->left(), x1);
1307 LOperand* right = UseFixed(instr->right(), x0);
1308 LCmpT* result = new(zone()) LCmpT(context, left, right);
1309 return MarkAsCall(DefineFixed(result, x0), instr);
1310 }
1311
1312
DoCompareHoleAndBranch(HCompareHoleAndBranch * instr)1313 LInstruction* LChunkBuilder::DoCompareHoleAndBranch(
1314 HCompareHoleAndBranch* instr) {
1315 LOperand* value = UseRegister(instr->value());
1316 if (instr->representation().IsTagged()) {
1317 return new(zone()) LCmpHoleAndBranchT(value);
1318 } else {
1319 LOperand* temp = TempRegister();
1320 return new(zone()) LCmpHoleAndBranchD(value, temp);
1321 }
1322 }
1323
1324
DoCompareObjectEqAndBranch(HCompareObjectEqAndBranch * instr)1325 LInstruction* LChunkBuilder::DoCompareObjectEqAndBranch(
1326 HCompareObjectEqAndBranch* instr) {
1327 LOperand* left = UseRegisterAtStart(instr->left());
1328 LOperand* right = UseRegisterAtStart(instr->right());
1329 return new(zone()) LCmpObjectEqAndBranch(left, right);
1330 }
1331
1332
DoCompareMap(HCompareMap * instr)1333 LInstruction* LChunkBuilder::DoCompareMap(HCompareMap* instr) {
1334 DCHECK(instr->value()->representation().IsTagged());
1335 LOperand* value = UseRegisterAtStart(instr->value());
1336 LOperand* temp = TempRegister();
1337 return new(zone()) LCmpMapAndBranch(value, temp);
1338 }
1339
1340
DoConstant(HConstant * instr)1341 LInstruction* LChunkBuilder::DoConstant(HConstant* instr) {
1342 Representation r = instr->representation();
1343 if (r.IsSmi()) {
1344 return DefineAsRegister(new(zone()) LConstantS);
1345 } else if (r.IsInteger32()) {
1346 return DefineAsRegister(new(zone()) LConstantI);
1347 } else if (r.IsDouble()) {
1348 return DefineAsRegister(new(zone()) LConstantD);
1349 } else if (r.IsExternal()) {
1350 return DefineAsRegister(new(zone()) LConstantE);
1351 } else if (r.IsTagged()) {
1352 return DefineAsRegister(new(zone()) LConstantT);
1353 } else {
1354 UNREACHABLE();
1355 return NULL;
1356 }
1357 }
1358
1359
DoContext(HContext * instr)1360 LInstruction* LChunkBuilder::DoContext(HContext* instr) {
1361 if (instr->HasNoUses()) return NULL;
1362
1363 if (info()->IsStub()) {
1364 return DefineFixed(new(zone()) LContext, cp);
1365 }
1366
1367 return DefineAsRegister(new(zone()) LContext);
1368 }
1369
1370
DoDebugBreak(HDebugBreak * instr)1371 LInstruction* LChunkBuilder::DoDebugBreak(HDebugBreak* instr) {
1372 return new(zone()) LDebugBreak();
1373 }
1374
1375
DoDeclareGlobals(HDeclareGlobals * instr)1376 LInstruction* LChunkBuilder::DoDeclareGlobals(HDeclareGlobals* instr) {
1377 LOperand* context = UseFixed(instr->context(), cp);
1378 return MarkAsCall(new(zone()) LDeclareGlobals(context), instr);
1379 }
1380
1381
DoDeoptimize(HDeoptimize * instr)1382 LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) {
1383 return AssignEnvironment(new(zone()) LDeoptimize);
1384 }
1385
1386
DoDivByPowerOf2I(HDiv * instr)1387 LInstruction* LChunkBuilder::DoDivByPowerOf2I(HDiv* instr) {
1388 DCHECK(instr->representation().IsInteger32());
1389 DCHECK(instr->left()->representation().Equals(instr->representation()));
1390 DCHECK(instr->right()->representation().Equals(instr->representation()));
1391 LOperand* dividend = UseRegister(instr->left());
1392 int32_t divisor = instr->right()->GetInteger32Constant();
1393 LInstruction* result = DefineAsRegister(new(zone()) LDivByPowerOf2I(
1394 dividend, divisor));
1395 if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
1396 (instr->CheckFlag(HValue::kCanOverflow) && divisor == -1) ||
1397 (!instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32) &&
1398 divisor != 1 && divisor != -1)) {
1399 result = AssignEnvironment(result);
1400 }
1401 return result;
1402 }
1403
1404
DoDivByConstI(HDiv * instr)1405 LInstruction* LChunkBuilder::DoDivByConstI(HDiv* instr) {
1406 DCHECK(instr->representation().IsInteger32());
1407 DCHECK(instr->left()->representation().Equals(instr->representation()));
1408 DCHECK(instr->right()->representation().Equals(instr->representation()));
1409 LOperand* dividend = UseRegister(instr->left());
1410 int32_t divisor = instr->right()->GetInteger32Constant();
1411 LOperand* temp = instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)
1412 ? NULL : TempRegister();
1413 LInstruction* result = DefineAsRegister(new(zone()) LDivByConstI(
1414 dividend, divisor, temp));
1415 if (divisor == 0 ||
1416 (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
1417 !instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
1418 result = AssignEnvironment(result);
1419 }
1420 return result;
1421 }
1422
1423
DoDivI(HBinaryOperation * instr)1424 LInstruction* LChunkBuilder::DoDivI(HBinaryOperation* instr) {
1425 DCHECK(instr->representation().IsSmiOrInteger32());
1426 DCHECK(instr->left()->representation().Equals(instr->representation()));
1427 DCHECK(instr->right()->representation().Equals(instr->representation()));
1428 LOperand* dividend = UseRegister(instr->left());
1429 LOperand* divisor = UseRegister(instr->right());
1430 LOperand* temp = instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)
1431 ? NULL : TempRegister();
1432 LInstruction* result =
1433 DefineAsRegister(new(zone()) LDivI(dividend, divisor, temp));
1434 if (!instr->CheckFlag(HValue::kAllUsesTruncatingToInt32)) {
1435 result = AssignEnvironment(result);
1436 }
1437 return result;
1438 }
1439
1440
DoDiv(HDiv * instr)1441 LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
1442 if (instr->representation().IsSmiOrInteger32()) {
1443 if (instr->RightIsPowerOf2()) {
1444 return DoDivByPowerOf2I(instr);
1445 } else if (instr->right()->IsConstant()) {
1446 return DoDivByConstI(instr);
1447 } else {
1448 return DoDivI(instr);
1449 }
1450 } else if (instr->representation().IsDouble()) {
1451 return DoArithmeticD(Token::DIV, instr);
1452 } else {
1453 return DoArithmeticT(Token::DIV, instr);
1454 }
1455 }
1456
1457
DoDummyUse(HDummyUse * instr)1458 LInstruction* LChunkBuilder::DoDummyUse(HDummyUse* instr) {
1459 return DefineAsRegister(new(zone()) LDummyUse(UseAny(instr->value())));
1460 }
1461
1462
DoEnterInlined(HEnterInlined * instr)1463 LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
1464 HEnvironment* outer = current_block_->last_environment();
1465 outer->set_ast_id(instr->ReturnId());
1466 HConstant* undefined = graph()->GetConstantUndefined();
1467 HEnvironment* inner = outer->CopyForInlining(instr->closure(),
1468 instr->arguments_count(),
1469 instr->function(),
1470 undefined,
1471 instr->inlining_kind());
1472 // Only replay binding of arguments object if it wasn't removed from graph.
1473 if ((instr->arguments_var() != NULL) &&
1474 instr->arguments_object()->IsLinked()) {
1475 inner->Bind(instr->arguments_var(), instr->arguments_object());
1476 }
1477 inner->BindContext(instr->closure_context());
1478 inner->set_entry(instr);
1479 current_block_->UpdateEnvironment(inner);
1480 chunk_->AddInlinedFunction(instr->shared());
1481 return NULL;
1482 }
1483
1484
DoEnvironmentMarker(HEnvironmentMarker * instr)1485 LInstruction* LChunkBuilder::DoEnvironmentMarker(HEnvironmentMarker* instr) {
1486 UNREACHABLE();
1487 return NULL;
1488 }
1489
1490
DoForceRepresentation(HForceRepresentation * instr)1491 LInstruction* LChunkBuilder::DoForceRepresentation(
1492 HForceRepresentation* instr) {
1493 // All HForceRepresentation instructions should be eliminated in the
1494 // representation change phase of Hydrogen.
1495 UNREACHABLE();
1496 return NULL;
1497 }
1498
1499
DoGetCachedArrayIndex(HGetCachedArrayIndex * instr)1500 LInstruction* LChunkBuilder::DoGetCachedArrayIndex(
1501 HGetCachedArrayIndex* instr) {
1502 DCHECK(instr->value()->representation().IsTagged());
1503 LOperand* value = UseRegisterAtStart(instr->value());
1504 return DefineAsRegister(new(zone()) LGetCachedArrayIndex(value));
1505 }
1506
1507
DoGoto(HGoto * instr)1508 LInstruction* LChunkBuilder::DoGoto(HGoto* instr) {
1509 return new(zone()) LGoto(instr->FirstSuccessor());
1510 }
1511
1512
DoHasCachedArrayIndexAndBranch(HHasCachedArrayIndexAndBranch * instr)1513 LInstruction* LChunkBuilder::DoHasCachedArrayIndexAndBranch(
1514 HHasCachedArrayIndexAndBranch* instr) {
1515 DCHECK(instr->value()->representation().IsTagged());
1516 return new(zone()) LHasCachedArrayIndexAndBranch(
1517 UseRegisterAtStart(instr->value()), TempRegister());
1518 }
1519
1520
DoHasInstanceTypeAndBranch(HHasInstanceTypeAndBranch * instr)1521 LInstruction* LChunkBuilder::DoHasInstanceTypeAndBranch(
1522 HHasInstanceTypeAndBranch* instr) {
1523 DCHECK(instr->value()->representation().IsTagged());
1524 LOperand* value = UseRegisterAtStart(instr->value());
1525 return new(zone()) LHasInstanceTypeAndBranch(value, TempRegister());
1526 }
1527
1528
DoInnerAllocatedObject(HInnerAllocatedObject * instr)1529 LInstruction* LChunkBuilder::DoInnerAllocatedObject(
1530 HInnerAllocatedObject* instr) {
1531 LOperand* base_object = UseRegisterAtStart(instr->base_object());
1532 LOperand* offset = UseRegisterOrConstantAtStart(instr->offset());
1533 return DefineAsRegister(
1534 new(zone()) LInnerAllocatedObject(base_object, offset));
1535 }
1536
1537
DoInstanceOf(HInstanceOf * instr)1538 LInstruction* LChunkBuilder::DoInstanceOf(HInstanceOf* instr) {
1539 LOperand* left =
1540 UseFixed(instr->left(), InstanceOfDescriptor::LeftRegister());
1541 LOperand* right =
1542 UseFixed(instr->right(), InstanceOfDescriptor::RightRegister());
1543 LOperand* context = UseFixed(instr->context(), cp);
1544 LInstanceOf* result = new (zone()) LInstanceOf(context, left, right);
1545 return MarkAsCall(DefineFixed(result, x0), instr);
1546 }
1547
1548
DoHasInPrototypeChainAndBranch(HHasInPrototypeChainAndBranch * instr)1549 LInstruction* LChunkBuilder::DoHasInPrototypeChainAndBranch(
1550 HHasInPrototypeChainAndBranch* instr) {
1551 LOperand* object = UseRegister(instr->object());
1552 LOperand* prototype = UseRegister(instr->prototype());
1553 LOperand* scratch1 = TempRegister();
1554 LOperand* scratch2 = TempRegister();
1555 LHasInPrototypeChainAndBranch* result = new (zone())
1556 LHasInPrototypeChainAndBranch(object, prototype, scratch1, scratch2);
1557 return AssignEnvironment(result);
1558 }
1559
1560
DoInvokeFunction(HInvokeFunction * instr)1561 LInstruction* LChunkBuilder::DoInvokeFunction(HInvokeFunction* instr) {
1562 LOperand* context = UseFixed(instr->context(), cp);
1563 // The function is required (by MacroAssembler::InvokeFunction) to be in x1.
1564 LOperand* function = UseFixed(instr->function(), x1);
1565 LInvokeFunction* result = new(zone()) LInvokeFunction(context, function);
1566 return MarkAsCall(DefineFixed(result, x0), instr, CANNOT_DEOPTIMIZE_EAGERLY);
1567 }
1568
1569
DoCompareMinusZeroAndBranch(HCompareMinusZeroAndBranch * instr)1570 LInstruction* LChunkBuilder::DoCompareMinusZeroAndBranch(
1571 HCompareMinusZeroAndBranch* instr) {
1572 LOperand* value = UseRegister(instr->value());
1573 LOperand* scratch = TempRegister();
1574 return new(zone()) LCompareMinusZeroAndBranch(value, scratch);
1575 }
1576
1577
DoIsStringAndBranch(HIsStringAndBranch * instr)1578 LInstruction* LChunkBuilder::DoIsStringAndBranch(HIsStringAndBranch* instr) {
1579 DCHECK(instr->value()->representation().IsTagged());
1580 LOperand* value = UseRegisterAtStart(instr->value());
1581 LOperand* temp = TempRegister();
1582 return new(zone()) LIsStringAndBranch(value, temp);
1583 }
1584
1585
DoIsSmiAndBranch(HIsSmiAndBranch * instr)1586 LInstruction* LChunkBuilder::DoIsSmiAndBranch(HIsSmiAndBranch* instr) {
1587 DCHECK(instr->value()->representation().IsTagged());
1588 return new(zone()) LIsSmiAndBranch(UseRegisterAtStart(instr->value()));
1589 }
1590
1591
DoIsUndetectableAndBranch(HIsUndetectableAndBranch * instr)1592 LInstruction* LChunkBuilder::DoIsUndetectableAndBranch(
1593 HIsUndetectableAndBranch* instr) {
1594 DCHECK(instr->value()->representation().IsTagged());
1595 LOperand* value = UseRegisterAtStart(instr->value());
1596 return new(zone()) LIsUndetectableAndBranch(value, TempRegister());
1597 }
1598
1599
DoLeaveInlined(HLeaveInlined * instr)1600 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
1601 LInstruction* pop = NULL;
1602 HEnvironment* env = current_block_->last_environment();
1603
1604 if (env->entry()->arguments_pushed()) {
1605 int argument_count = env->arguments_environment()->parameter_count();
1606 pop = new(zone()) LDrop(argument_count);
1607 DCHECK(instr->argument_delta() == -argument_count);
1608 }
1609
1610 HEnvironment* outer =
1611 current_block_->last_environment()->DiscardInlined(false);
1612 current_block_->UpdateEnvironment(outer);
1613
1614 return pop;
1615 }
1616
1617
DoLoadContextSlot(HLoadContextSlot * instr)1618 LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
1619 LOperand* context = UseRegisterAtStart(instr->value());
1620 LInstruction* result =
1621 DefineAsRegister(new(zone()) LLoadContextSlot(context));
1622 if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) {
1623 result = AssignEnvironment(result);
1624 }
1625 return result;
1626 }
1627
1628
DoLoadFunctionPrototype(HLoadFunctionPrototype * instr)1629 LInstruction* LChunkBuilder::DoLoadFunctionPrototype(
1630 HLoadFunctionPrototype* instr) {
1631 LOperand* function = UseRegister(instr->function());
1632 LOperand* temp = TempRegister();
1633 return AssignEnvironment(DefineAsRegister(
1634 new(zone()) LLoadFunctionPrototype(function, temp)));
1635 }
1636
1637
DoLoadGlobalGeneric(HLoadGlobalGeneric * instr)1638 LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) {
1639 LOperand* context = UseFixed(instr->context(), cp);
1640 LOperand* global_object =
1641 UseFixed(instr->global_object(), LoadDescriptor::ReceiverRegister());
1642 LOperand* vector = NULL;
1643 if (instr->HasVectorAndSlot()) {
1644 vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister());
1645 }
1646
1647 LLoadGlobalGeneric* result =
1648 new(zone()) LLoadGlobalGeneric(context, global_object, vector);
1649 return MarkAsCall(DefineFixed(result, x0), instr);
1650 }
1651
1652
DoLoadKeyed(HLoadKeyed * instr)1653 LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
1654 DCHECK(instr->key()->representation().IsSmiOrInteger32());
1655 ElementsKind elements_kind = instr->elements_kind();
1656 LOperand* elements = UseRegister(instr->elements());
1657 LOperand* key = UseRegisterOrConstant(instr->key());
1658
1659 if (!instr->is_fixed_typed_array()) {
1660 if (instr->representation().IsDouble()) {
1661 LOperand* temp = (!instr->key()->IsConstant() ||
1662 instr->RequiresHoleCheck())
1663 ? TempRegister()
1664 : NULL;
1665 LInstruction* result = DefineAsRegister(
1666 new (zone()) LLoadKeyedFixedDouble(elements, key, temp));
1667 if (instr->RequiresHoleCheck()) {
1668 result = AssignEnvironment(result);
1669 }
1670 return result;
1671 } else {
1672 DCHECK(instr->representation().IsSmiOrTagged() ||
1673 instr->representation().IsInteger32());
1674 LOperand* temp = instr->key()->IsConstant() ? NULL : TempRegister();
1675 LInstruction* result =
1676 DefineAsRegister(new (zone()) LLoadKeyedFixed(elements, key, temp));
1677 if (instr->RequiresHoleCheck() ||
1678 (instr->hole_mode() == CONVERT_HOLE_TO_UNDEFINED &&
1679 info()->IsStub())) {
1680 result = AssignEnvironment(result);
1681 }
1682 return result;
1683 }
1684 } else {
1685 DCHECK((instr->representation().IsInteger32() &&
1686 !IsDoubleOrFloatElementsKind(instr->elements_kind())) ||
1687 (instr->representation().IsDouble() &&
1688 IsDoubleOrFloatElementsKind(instr->elements_kind())));
1689
1690 LOperand* temp = instr->key()->IsConstant() ? NULL : TempRegister();
1691 LOperand* backing_store_owner = UseAny(instr->backing_store_owner());
1692 LInstruction* result = DefineAsRegister(new (zone()) LLoadKeyedExternal(
1693 elements, key, backing_store_owner, temp));
1694 if (elements_kind == UINT32_ELEMENTS &&
1695 !instr->CheckFlag(HInstruction::kUint32)) {
1696 result = AssignEnvironment(result);
1697 }
1698 return result;
1699 }
1700 }
1701
1702
DoLoadKeyedGeneric(HLoadKeyedGeneric * instr)1703 LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
1704 LOperand* context = UseFixed(instr->context(), cp);
1705 LOperand* object =
1706 UseFixed(instr->object(), LoadDescriptor::ReceiverRegister());
1707 LOperand* key = UseFixed(instr->key(), LoadDescriptor::NameRegister());
1708 LOperand* vector = NULL;
1709 if (instr->HasVectorAndSlot()) {
1710 vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister());
1711 }
1712
1713 LInstruction* result =
1714 DefineFixed(new(zone()) LLoadKeyedGeneric(context, object, key, vector),
1715 x0);
1716 return MarkAsCall(result, instr);
1717 }
1718
1719
DoLoadNamedField(HLoadNamedField * instr)1720 LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
1721 LOperand* object = UseRegisterAtStart(instr->object());
1722 return DefineAsRegister(new(zone()) LLoadNamedField(object));
1723 }
1724
1725
DoLoadNamedGeneric(HLoadNamedGeneric * instr)1726 LInstruction* LChunkBuilder::DoLoadNamedGeneric(HLoadNamedGeneric* instr) {
1727 LOperand* context = UseFixed(instr->context(), cp);
1728 LOperand* object =
1729 UseFixed(instr->object(), LoadDescriptor::ReceiverRegister());
1730 LOperand* vector = NULL;
1731 if (instr->HasVectorAndSlot()) {
1732 vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister());
1733 }
1734
1735 LInstruction* result =
1736 DefineFixed(new(zone()) LLoadNamedGeneric(context, object, vector), x0);
1737 return MarkAsCall(result, instr);
1738 }
1739
1740
DoLoadRoot(HLoadRoot * instr)1741 LInstruction* LChunkBuilder::DoLoadRoot(HLoadRoot* instr) {
1742 return DefineAsRegister(new(zone()) LLoadRoot);
1743 }
1744
1745
DoMapEnumLength(HMapEnumLength * instr)1746 LInstruction* LChunkBuilder::DoMapEnumLength(HMapEnumLength* instr) {
1747 LOperand* map = UseRegisterAtStart(instr->value());
1748 return DefineAsRegister(new(zone()) LMapEnumLength(map));
1749 }
1750
1751
DoFlooringDivByPowerOf2I(HMathFloorOfDiv * instr)1752 LInstruction* LChunkBuilder::DoFlooringDivByPowerOf2I(HMathFloorOfDiv* instr) {
1753 DCHECK(instr->representation().IsInteger32());
1754 DCHECK(instr->left()->representation().Equals(instr->representation()));
1755 DCHECK(instr->right()->representation().Equals(instr->representation()));
1756 LOperand* dividend = UseRegisterAtStart(instr->left());
1757 int32_t divisor = instr->right()->GetInteger32Constant();
1758 LInstruction* result = DefineAsRegister(new(zone()) LFlooringDivByPowerOf2I(
1759 dividend, divisor));
1760 if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
1761 (instr->CheckFlag(HValue::kLeftCanBeMinInt) && divisor == -1)) {
1762 result = AssignEnvironment(result);
1763 }
1764 return result;
1765 }
1766
1767
DoFlooringDivByConstI(HMathFloorOfDiv * instr)1768 LInstruction* LChunkBuilder::DoFlooringDivByConstI(HMathFloorOfDiv* instr) {
1769 DCHECK(instr->representation().IsInteger32());
1770 DCHECK(instr->left()->representation().Equals(instr->representation()));
1771 DCHECK(instr->right()->representation().Equals(instr->representation()));
1772 LOperand* dividend = UseRegister(instr->left());
1773 int32_t divisor = instr->right()->GetInteger32Constant();
1774 LOperand* temp =
1775 ((divisor > 0 && !instr->CheckFlag(HValue::kLeftCanBeNegative)) ||
1776 (divisor < 0 && !instr->CheckFlag(HValue::kLeftCanBePositive))) ?
1777 NULL : TempRegister();
1778 LInstruction* result = DefineAsRegister(
1779 new(zone()) LFlooringDivByConstI(dividend, divisor, temp));
1780 if (divisor == 0 ||
1781 (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0)) {
1782 result = AssignEnvironment(result);
1783 }
1784 return result;
1785 }
1786
1787
DoFlooringDivI(HMathFloorOfDiv * instr)1788 LInstruction* LChunkBuilder::DoFlooringDivI(HMathFloorOfDiv* instr) {
1789 LOperand* dividend = UseRegister(instr->left());
1790 LOperand* divisor = UseRegister(instr->right());
1791 LOperand* remainder = TempRegister();
1792 LInstruction* result =
1793 DefineAsRegister(new(zone()) LFlooringDivI(dividend, divisor, remainder));
1794 return AssignEnvironment(result);
1795 }
1796
1797
DoMathFloorOfDiv(HMathFloorOfDiv * instr)1798 LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
1799 if (instr->RightIsPowerOf2()) {
1800 return DoFlooringDivByPowerOf2I(instr);
1801 } else if (instr->right()->IsConstant()) {
1802 return DoFlooringDivByConstI(instr);
1803 } else {
1804 return DoFlooringDivI(instr);
1805 }
1806 }
1807
1808
DoMathMinMax(HMathMinMax * instr)1809 LInstruction* LChunkBuilder::DoMathMinMax(HMathMinMax* instr) {
1810 LOperand* left = NULL;
1811 LOperand* right = NULL;
1812 if (instr->representation().IsSmiOrInteger32()) {
1813 DCHECK(instr->left()->representation().Equals(instr->representation()));
1814 DCHECK(instr->right()->representation().Equals(instr->representation()));
1815 left = UseRegisterAtStart(instr->BetterLeftOperand());
1816 right = UseRegisterOrConstantAtStart(instr->BetterRightOperand());
1817 } else {
1818 DCHECK(instr->representation().IsDouble());
1819 DCHECK(instr->left()->representation().IsDouble());
1820 DCHECK(instr->right()->representation().IsDouble());
1821 left = UseRegisterAtStart(instr->left());
1822 right = UseRegisterAtStart(instr->right());
1823 }
1824 return DefineAsRegister(new(zone()) LMathMinMax(left, right));
1825 }
1826
1827
DoModByPowerOf2I(HMod * instr)1828 LInstruction* LChunkBuilder::DoModByPowerOf2I(HMod* instr) {
1829 DCHECK(instr->representation().IsInteger32());
1830 DCHECK(instr->left()->representation().Equals(instr->representation()));
1831 DCHECK(instr->right()->representation().Equals(instr->representation()));
1832 LOperand* dividend = UseRegisterAtStart(instr->left());
1833 int32_t divisor = instr->right()->GetInteger32Constant();
1834 LInstruction* result = DefineSameAsFirst(new(zone()) LModByPowerOf2I(
1835 dividend, divisor));
1836 if (instr->CheckFlag(HValue::kLeftCanBeNegative) &&
1837 instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
1838 result = AssignEnvironment(result);
1839 }
1840 return result;
1841 }
1842
1843
DoModByConstI(HMod * instr)1844 LInstruction* LChunkBuilder::DoModByConstI(HMod* instr) {
1845 DCHECK(instr->representation().IsInteger32());
1846 DCHECK(instr->left()->representation().Equals(instr->representation()));
1847 DCHECK(instr->right()->representation().Equals(instr->representation()));
1848 LOperand* dividend = UseRegister(instr->left());
1849 int32_t divisor = instr->right()->GetInteger32Constant();
1850 LOperand* temp = TempRegister();
1851 LInstruction* result = DefineAsRegister(new(zone()) LModByConstI(
1852 dividend, divisor, temp));
1853 if (divisor == 0 || instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
1854 result = AssignEnvironment(result);
1855 }
1856 return result;
1857 }
1858
1859
DoModI(HMod * instr)1860 LInstruction* LChunkBuilder::DoModI(HMod* instr) {
1861 DCHECK(instr->representation().IsSmiOrInteger32());
1862 DCHECK(instr->left()->representation().Equals(instr->representation()));
1863 DCHECK(instr->right()->representation().Equals(instr->representation()));
1864 LOperand* dividend = UseRegister(instr->left());
1865 LOperand* divisor = UseRegister(instr->right());
1866 LInstruction* result = DefineAsRegister(new(zone()) LModI(dividend, divisor));
1867 if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
1868 instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
1869 result = AssignEnvironment(result);
1870 }
1871 return result;
1872 }
1873
1874
DoMod(HMod * instr)1875 LInstruction* LChunkBuilder::DoMod(HMod* instr) {
1876 if (instr->representation().IsSmiOrInteger32()) {
1877 if (instr->RightIsPowerOf2()) {
1878 return DoModByPowerOf2I(instr);
1879 } else if (instr->right()->IsConstant()) {
1880 return DoModByConstI(instr);
1881 } else {
1882 return DoModI(instr);
1883 }
1884 } else if (instr->representation().IsDouble()) {
1885 return DoArithmeticD(Token::MOD, instr);
1886 } else {
1887 return DoArithmeticT(Token::MOD, instr);
1888 }
1889 }
1890
1891
DoMul(HMul * instr)1892 LInstruction* LChunkBuilder::DoMul(HMul* instr) {
1893 if (instr->representation().IsSmiOrInteger32()) {
1894 DCHECK(instr->left()->representation().Equals(instr->representation()));
1895 DCHECK(instr->right()->representation().Equals(instr->representation()));
1896
1897 bool can_overflow = instr->CheckFlag(HValue::kCanOverflow);
1898 bool bailout_on_minus_zero = instr->CheckFlag(HValue::kBailoutOnMinusZero);
1899
1900 HValue* least_const = instr->BetterLeftOperand();
1901 HValue* most_const = instr->BetterRightOperand();
1902
1903 // LMulConstI can handle a subset of constants:
1904 // With support for overflow detection:
1905 // -1, 0, 1, 2
1906 // 2^n, -(2^n)
1907 // Without support for overflow detection:
1908 // 2^n + 1, -(2^n - 1)
1909 if (most_const->IsConstant()) {
1910 int32_t constant = HConstant::cast(most_const)->Integer32Value();
1911 bool small_constant = (constant >= -1) && (constant <= 2);
1912 bool end_range_constant = (constant <= -kMaxInt) || (constant == kMaxInt);
1913 int32_t constant_abs = Abs(constant);
1914
1915 if (!end_range_constant &&
1916 (small_constant || (base::bits::IsPowerOfTwo32(constant_abs)) ||
1917 (!can_overflow && (base::bits::IsPowerOfTwo32(constant_abs + 1) ||
1918 base::bits::IsPowerOfTwo32(constant_abs - 1))))) {
1919 LConstantOperand* right = UseConstant(most_const);
1920 bool need_register =
1921 base::bits::IsPowerOfTwo32(constant_abs) && !small_constant;
1922 LOperand* left = need_register ? UseRegister(least_const)
1923 : UseRegisterAtStart(least_const);
1924 LInstruction* result =
1925 DefineAsRegister(new(zone()) LMulConstIS(left, right));
1926 if ((bailout_on_minus_zero && constant <= 0) ||
1927 (can_overflow && constant != 1 &&
1928 base::bits::IsPowerOfTwo32(constant_abs))) {
1929 result = AssignEnvironment(result);
1930 }
1931 return result;
1932 }
1933 }
1934
1935 // LMulI/S can handle all cases, but it requires that a register is
1936 // allocated for the second operand.
1937 LOperand* left = UseRegisterAtStart(least_const);
1938 LOperand* right = UseRegisterAtStart(most_const);
1939 LInstruction* result = instr->representation().IsSmi()
1940 ? DefineAsRegister(new(zone()) LMulS(left, right))
1941 : DefineAsRegister(new(zone()) LMulI(left, right));
1942 if ((bailout_on_minus_zero && least_const != most_const) || can_overflow) {
1943 result = AssignEnvironment(result);
1944 }
1945 return result;
1946 } else if (instr->representation().IsDouble()) {
1947 return DoArithmeticD(Token::MUL, instr);
1948 } else {
1949 return DoArithmeticT(Token::MUL, instr);
1950 }
1951 }
1952
1953
DoOsrEntry(HOsrEntry * instr)1954 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
1955 DCHECK(argument_count_ == 0);
1956 allocator_->MarkAsOsrEntry();
1957 current_block_->last_environment()->set_ast_id(instr->ast_id());
1958 return AssignEnvironment(new(zone()) LOsrEntry);
1959 }
1960
1961
DoParameter(HParameter * instr)1962 LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
1963 LParameter* result = new(zone()) LParameter;
1964 if (instr->kind() == HParameter::STACK_PARAMETER) {
1965 int spill_index = chunk_->GetParameterStackSlot(instr->index());
1966 return DefineAsSpilled(result, spill_index);
1967 } else {
1968 DCHECK(info()->IsStub());
1969 CallInterfaceDescriptor descriptor =
1970 info()->code_stub()->GetCallInterfaceDescriptor();
1971 int index = static_cast<int>(instr->index());
1972 Register reg = descriptor.GetRegisterParameter(index);
1973 return DefineFixed(result, reg);
1974 }
1975 }
1976
1977
DoPower(HPower * instr)1978 LInstruction* LChunkBuilder::DoPower(HPower* instr) {
1979 DCHECK(instr->representation().IsDouble());
1980 // We call a C function for double power. It can't trigger a GC.
1981 // We need to use fixed result register for the call.
1982 Representation exponent_type = instr->right()->representation();
1983 DCHECK(instr->left()->representation().IsDouble());
1984 LOperand* left = UseFixedDouble(instr->left(), d0);
1985 LOperand* right;
1986 if (exponent_type.IsInteger32()) {
1987 right = UseFixed(instr->right(), MathPowIntegerDescriptor::exponent());
1988 } else if (exponent_type.IsDouble()) {
1989 right = UseFixedDouble(instr->right(), d1);
1990 } else {
1991 right = UseFixed(instr->right(), MathPowTaggedDescriptor::exponent());
1992 }
1993 LPower* result = new(zone()) LPower(left, right);
1994 return MarkAsCall(DefineFixedDouble(result, d0),
1995 instr,
1996 CAN_DEOPTIMIZE_EAGERLY);
1997 }
1998
1999
DoPushArguments(HPushArguments * instr)2000 LInstruction* LChunkBuilder::DoPushArguments(HPushArguments* instr) {
2001 int argc = instr->OperandCount();
2002 AddInstruction(new(zone()) LPreparePushArguments(argc), instr);
2003
2004 LPushArguments* push_args = new(zone()) LPushArguments(zone());
2005
2006 for (int i = 0; i < argc; ++i) {
2007 if (push_args->ShouldSplitPush()) {
2008 AddInstruction(push_args, instr);
2009 push_args = new(zone()) LPushArguments(zone());
2010 }
2011 push_args->AddArgument(UseRegister(instr->argument(i)));
2012 }
2013
2014 return push_args;
2015 }
2016
2017
DoDoubleBits(HDoubleBits * instr)2018 LInstruction* LChunkBuilder::DoDoubleBits(HDoubleBits* instr) {
2019 HValue* value = instr->value();
2020 DCHECK(value->representation().IsDouble());
2021 return DefineAsRegister(new(zone()) LDoubleBits(UseRegister(value)));
2022 }
2023
2024
DoConstructDouble(HConstructDouble * instr)2025 LInstruction* LChunkBuilder::DoConstructDouble(HConstructDouble* instr) {
2026 LOperand* lo = UseRegisterAndClobber(instr->lo());
2027 LOperand* hi = UseRegister(instr->hi());
2028 return DefineAsRegister(new(zone()) LConstructDouble(hi, lo));
2029 }
2030
2031
DoReturn(HReturn * instr)2032 LInstruction* LChunkBuilder::DoReturn(HReturn* instr) {
2033 LOperand* context = info()->IsStub()
2034 ? UseFixed(instr->context(), cp)
2035 : NULL;
2036 LOperand* parameter_count = UseRegisterOrConstant(instr->parameter_count());
2037 return new(zone()) LReturn(UseFixed(instr->value(), x0), context,
2038 parameter_count);
2039 }
2040
2041
DoSeqStringGetChar(HSeqStringGetChar * instr)2042 LInstruction* LChunkBuilder::DoSeqStringGetChar(HSeqStringGetChar* instr) {
2043 LOperand* string = UseRegisterAtStart(instr->string());
2044 LOperand* index = UseRegisterOrConstantAtStart(instr->index());
2045 LOperand* temp = TempRegister();
2046 LSeqStringGetChar* result =
2047 new(zone()) LSeqStringGetChar(string, index, temp);
2048 return DefineAsRegister(result);
2049 }
2050
2051
DoSeqStringSetChar(HSeqStringSetChar * instr)2052 LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
2053 LOperand* string = UseRegister(instr->string());
2054 LOperand* index = FLAG_debug_code
2055 ? UseRegister(instr->index())
2056 : UseRegisterOrConstant(instr->index());
2057 LOperand* value = UseRegister(instr->value());
2058 LOperand* context = FLAG_debug_code ? UseFixed(instr->context(), cp) : NULL;
2059 LOperand* temp = TempRegister();
2060 LSeqStringSetChar* result =
2061 new(zone()) LSeqStringSetChar(context, string, index, value, temp);
2062 return DefineAsRegister(result);
2063 }
2064
2065
CanTransformToShiftedOp(HValue * val,HValue ** left)2066 HBitwiseBinaryOperation* LChunkBuilder::CanTransformToShiftedOp(HValue* val,
2067 HValue** left) {
2068 if (!val->representation().IsInteger32()) return NULL;
2069 if (!(val->IsBitwise() || val->IsAdd() || val->IsSub())) return NULL;
2070
2071 HBinaryOperation* hinstr = HBinaryOperation::cast(val);
2072 HValue* hleft = hinstr->left();
2073 HValue* hright = hinstr->right();
2074 DCHECK(hleft->representation().Equals(hinstr->representation()));
2075 DCHECK(hright->representation().Equals(hinstr->representation()));
2076
2077 if (hleft == hright) return NULL;
2078
2079 if ((hright->IsConstant() &&
2080 LikelyFitsImmField(hinstr, HConstant::cast(hright)->Integer32Value())) ||
2081 (hinstr->IsCommutative() && hleft->IsConstant() &&
2082 LikelyFitsImmField(hinstr, HConstant::cast(hleft)->Integer32Value()))) {
2083 // The constant operand will likely fit in the immediate field. We are
2084 // better off with
2085 // lsl x8, x9, #imm
2086 // add x0, x8, #imm2
2087 // than with
2088 // mov x16, #imm2
2089 // add x0, x16, x9 LSL #imm
2090 return NULL;
2091 }
2092
2093 HBitwiseBinaryOperation* shift = NULL;
2094 // TODO(aleram): We will miss situations where a shift operation is used by
2095 // different instructions both as a left and right operands.
2096 if (hright->IsBitwiseBinaryShift() &&
2097 HBitwiseBinaryOperation::cast(hright)->right()->IsConstant()) {
2098 shift = HBitwiseBinaryOperation::cast(hright);
2099 if (left != NULL) {
2100 *left = hleft;
2101 }
2102 } else if (hinstr->IsCommutative() &&
2103 hleft->IsBitwiseBinaryShift() &&
2104 HBitwiseBinaryOperation::cast(hleft)->right()->IsConstant()) {
2105 shift = HBitwiseBinaryOperation::cast(hleft);
2106 if (left != NULL) {
2107 *left = hright;
2108 }
2109 } else {
2110 return NULL;
2111 }
2112
2113 if ((JSShiftAmountFromHConstant(shift->right()) == 0) && shift->IsShr()) {
2114 // Shifts right by zero can deoptimize.
2115 return NULL;
2116 }
2117
2118 return shift;
2119 }
2120
2121
ShiftCanBeOptimizedAway(HBitwiseBinaryOperation * shift)2122 bool LChunkBuilder::ShiftCanBeOptimizedAway(HBitwiseBinaryOperation* shift) {
2123 if (!shift->representation().IsInteger32()) {
2124 return false;
2125 }
2126 for (HUseIterator it(shift->uses()); !it.Done(); it.Advance()) {
2127 if (shift != CanTransformToShiftedOp(it.value())) {
2128 return false;
2129 }
2130 }
2131 return true;
2132 }
2133
2134
TryDoOpWithShiftedRightOperand(HBinaryOperation * instr)2135 LInstruction* LChunkBuilder::TryDoOpWithShiftedRightOperand(
2136 HBinaryOperation* instr) {
2137 HValue* left;
2138 HBitwiseBinaryOperation* shift = CanTransformToShiftedOp(instr, &left);
2139
2140 if ((shift != NULL) && ShiftCanBeOptimizedAway(shift)) {
2141 return DoShiftedBinaryOp(instr, left, shift);
2142 }
2143 return NULL;
2144 }
2145
2146
DoShiftedBinaryOp(HBinaryOperation * hinstr,HValue * hleft,HBitwiseBinaryOperation * hshift)2147 LInstruction* LChunkBuilder::DoShiftedBinaryOp(
2148 HBinaryOperation* hinstr, HValue* hleft, HBitwiseBinaryOperation* hshift) {
2149 DCHECK(hshift->IsBitwiseBinaryShift());
2150 DCHECK(!hshift->IsShr() || (JSShiftAmountFromHConstant(hshift->right()) > 0));
2151
2152 LTemplateResultInstruction<1>* res;
2153 LOperand* left = UseRegisterAtStart(hleft);
2154 LOperand* right = UseRegisterAtStart(hshift->left());
2155 LOperand* shift_amount = UseConstant(hshift->right());
2156 Shift shift_op;
2157 switch (hshift->opcode()) {
2158 case HValue::kShl: shift_op = LSL; break;
2159 case HValue::kShr: shift_op = LSR; break;
2160 case HValue::kSar: shift_op = ASR; break;
2161 default: UNREACHABLE(); shift_op = NO_SHIFT;
2162 }
2163
2164 if (hinstr->IsBitwise()) {
2165 res = new(zone()) LBitI(left, right, shift_op, shift_amount);
2166 } else if (hinstr->IsAdd()) {
2167 res = new(zone()) LAddI(left, right, shift_op, shift_amount);
2168 } else {
2169 DCHECK(hinstr->IsSub());
2170 res = new(zone()) LSubI(left, right, shift_op, shift_amount);
2171 }
2172 if (hinstr->CheckFlag(HValue::kCanOverflow)) {
2173 AssignEnvironment(res);
2174 }
2175 return DefineAsRegister(res);
2176 }
2177
2178
DoShift(Token::Value op,HBitwiseBinaryOperation * instr)2179 LInstruction* LChunkBuilder::DoShift(Token::Value op,
2180 HBitwiseBinaryOperation* instr) {
2181 if (instr->representation().IsTagged()) {
2182 return DoArithmeticT(op, instr);
2183 }
2184
2185 DCHECK(instr->representation().IsSmiOrInteger32());
2186 DCHECK(instr->left()->representation().Equals(instr->representation()));
2187 DCHECK(instr->right()->representation().Equals(instr->representation()));
2188
2189 if (ShiftCanBeOptimizedAway(instr)) {
2190 return NULL;
2191 }
2192
2193 LOperand* left = instr->representation().IsSmi()
2194 ? UseRegister(instr->left())
2195 : UseRegisterAtStart(instr->left());
2196 LOperand* right = UseRegisterOrConstantAtStart(instr->right());
2197
2198 // The only shift that can deoptimize is `left >>> 0`, where left is negative.
2199 // In these cases, the result is a uint32 that is too large for an int32.
2200 bool right_can_be_zero = !instr->right()->IsConstant() ||
2201 (JSShiftAmountFromHConstant(instr->right()) == 0);
2202 bool can_deopt = false;
2203 if ((op == Token::SHR) && right_can_be_zero) {
2204 can_deopt = !instr->CheckFlag(HInstruction::kUint32);
2205 }
2206
2207 LInstruction* result;
2208 if (instr->representation().IsInteger32()) {
2209 result = DefineAsRegister(new (zone()) LShiftI(op, left, right, can_deopt));
2210 } else {
2211 DCHECK(instr->representation().IsSmi());
2212 result = DefineAsRegister(new (zone()) LShiftS(op, left, right, can_deopt));
2213 }
2214
2215 return can_deopt ? AssignEnvironment(result) : result;
2216 }
2217
2218
DoRor(HRor * instr)2219 LInstruction* LChunkBuilder::DoRor(HRor* instr) {
2220 return DoShift(Token::ROR, instr);
2221 }
2222
2223
DoSar(HSar * instr)2224 LInstruction* LChunkBuilder::DoSar(HSar* instr) {
2225 return DoShift(Token::SAR, instr);
2226 }
2227
2228
DoShl(HShl * instr)2229 LInstruction* LChunkBuilder::DoShl(HShl* instr) {
2230 return DoShift(Token::SHL, instr);
2231 }
2232
2233
DoShr(HShr * instr)2234 LInstruction* LChunkBuilder::DoShr(HShr* instr) {
2235 return DoShift(Token::SHR, instr);
2236 }
2237
2238
DoSimulate(HSimulate * instr)2239 LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
2240 instr->ReplayEnvironment(current_block_->last_environment());
2241 return NULL;
2242 }
2243
2244
DoStackCheck(HStackCheck * instr)2245 LInstruction* LChunkBuilder::DoStackCheck(HStackCheck* instr) {
2246 if (instr->is_function_entry()) {
2247 LOperand* context = UseFixed(instr->context(), cp);
2248 return MarkAsCall(new(zone()) LStackCheck(context), instr);
2249 } else {
2250 DCHECK(instr->is_backwards_branch());
2251 LOperand* context = UseAny(instr->context());
2252 return AssignEnvironment(
2253 AssignPointerMap(new(zone()) LStackCheck(context)));
2254 }
2255 }
2256
2257
DoStoreCodeEntry(HStoreCodeEntry * instr)2258 LInstruction* LChunkBuilder::DoStoreCodeEntry(HStoreCodeEntry* instr) {
2259 LOperand* function = UseRegister(instr->function());
2260 LOperand* code_object = UseRegisterAtStart(instr->code_object());
2261 LOperand* temp = TempRegister();
2262 return new(zone()) LStoreCodeEntry(function, code_object, temp);
2263 }
2264
2265
DoStoreContextSlot(HStoreContextSlot * instr)2266 LInstruction* LChunkBuilder::DoStoreContextSlot(HStoreContextSlot* instr) {
2267 LOperand* temp = TempRegister();
2268 LOperand* context;
2269 LOperand* value;
2270 if (instr->NeedsWriteBarrier()) {
2271 // TODO(all): Replace these constraints when RecordWriteStub has been
2272 // rewritten.
2273 context = UseRegisterAndClobber(instr->context());
2274 value = UseRegisterAndClobber(instr->value());
2275 } else {
2276 context = UseRegister(instr->context());
2277 value = UseRegister(instr->value());
2278 }
2279 LInstruction* result = new(zone()) LStoreContextSlot(context, value, temp);
2280 if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) {
2281 result = AssignEnvironment(result);
2282 }
2283 return result;
2284 }
2285
2286
DoStoreKeyed(HStoreKeyed * instr)2287 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
2288 LOperand* key = UseRegisterOrConstant(instr->key());
2289 LOperand* temp = NULL;
2290 LOperand* elements = NULL;
2291 LOperand* val = NULL;
2292
2293 if (!instr->is_fixed_typed_array() &&
2294 instr->value()->representation().IsTagged() &&
2295 instr->NeedsWriteBarrier()) {
2296 // RecordWrite() will clobber all registers.
2297 elements = UseRegisterAndClobber(instr->elements());
2298 val = UseRegisterAndClobber(instr->value());
2299 temp = TempRegister();
2300 } else {
2301 elements = UseRegister(instr->elements());
2302 val = UseRegister(instr->value());
2303 temp = instr->key()->IsConstant() ? NULL : TempRegister();
2304 }
2305
2306 if (instr->is_fixed_typed_array()) {
2307 DCHECK((instr->value()->representation().IsInteger32() &&
2308 !IsDoubleOrFloatElementsKind(instr->elements_kind())) ||
2309 (instr->value()->representation().IsDouble() &&
2310 IsDoubleOrFloatElementsKind(instr->elements_kind())));
2311 DCHECK(instr->elements()->representation().IsExternal());
2312 LOperand* backing_store_owner = UseAny(instr->backing_store_owner());
2313 return new (zone())
2314 LStoreKeyedExternal(elements, key, val, backing_store_owner, temp);
2315
2316 } else if (instr->value()->representation().IsDouble()) {
2317 DCHECK(instr->elements()->representation().IsTagged());
2318 return new(zone()) LStoreKeyedFixedDouble(elements, key, val, temp);
2319
2320 } else {
2321 DCHECK(instr->elements()->representation().IsTagged());
2322 DCHECK(instr->value()->representation().IsSmiOrTagged() ||
2323 instr->value()->representation().IsInteger32());
2324 return new(zone()) LStoreKeyedFixed(elements, key, val, temp);
2325 }
2326 }
2327
2328
DoStoreKeyedGeneric(HStoreKeyedGeneric * instr)2329 LInstruction* LChunkBuilder::DoStoreKeyedGeneric(HStoreKeyedGeneric* instr) {
2330 LOperand* context = UseFixed(instr->context(), cp);
2331 LOperand* object =
2332 UseFixed(instr->object(), StoreDescriptor::ReceiverRegister());
2333 LOperand* key = UseFixed(instr->key(), StoreDescriptor::NameRegister());
2334 LOperand* value = UseFixed(instr->value(), StoreDescriptor::ValueRegister());
2335
2336 DCHECK(instr->object()->representation().IsTagged());
2337 DCHECK(instr->key()->representation().IsTagged());
2338 DCHECK(instr->value()->representation().IsTagged());
2339
2340 LOperand* slot = NULL;
2341 LOperand* vector = NULL;
2342 if (instr->HasVectorAndSlot()) {
2343 slot = FixedTemp(VectorStoreICDescriptor::SlotRegister());
2344 vector = FixedTemp(VectorStoreICDescriptor::VectorRegister());
2345 }
2346
2347 LStoreKeyedGeneric* result = new (zone())
2348 LStoreKeyedGeneric(context, object, key, value, slot, vector);
2349 return MarkAsCall(result, instr);
2350 }
2351
2352
DoStoreNamedField(HStoreNamedField * instr)2353 LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
2354 // TODO(jbramley): It might be beneficial to allow value to be a constant in
2355 // some cases. x64 makes use of this with FLAG_track_fields, for example.
2356
2357 LOperand* object = UseRegister(instr->object());
2358 LOperand* value;
2359 LOperand* temp0 = NULL;
2360 LOperand* temp1 = NULL;
2361
2362 if (instr->access().IsExternalMemory() ||
2363 (!FLAG_unbox_double_fields && instr->field_representation().IsDouble())) {
2364 value = UseRegister(instr->value());
2365 } else if (instr->NeedsWriteBarrier()) {
2366 value = UseRegisterAndClobber(instr->value());
2367 temp0 = TempRegister();
2368 temp1 = TempRegister();
2369 } else if (instr->NeedsWriteBarrierForMap()) {
2370 value = UseRegister(instr->value());
2371 temp0 = TempRegister();
2372 temp1 = TempRegister();
2373 } else {
2374 value = UseRegister(instr->value());
2375 temp0 = TempRegister();
2376 }
2377
2378 return new(zone()) LStoreNamedField(object, value, temp0, temp1);
2379 }
2380
2381
DoStoreNamedGeneric(HStoreNamedGeneric * instr)2382 LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
2383 LOperand* context = UseFixed(instr->context(), cp);
2384 LOperand* object =
2385 UseFixed(instr->object(), StoreDescriptor::ReceiverRegister());
2386 LOperand* value = UseFixed(instr->value(), StoreDescriptor::ValueRegister());
2387
2388 LOperand* slot = NULL;
2389 LOperand* vector = NULL;
2390 if (instr->HasVectorAndSlot()) {
2391 slot = FixedTemp(VectorStoreICDescriptor::SlotRegister());
2392 vector = FixedTemp(VectorStoreICDescriptor::VectorRegister());
2393 }
2394
2395 LStoreNamedGeneric* result =
2396 new (zone()) LStoreNamedGeneric(context, object, value, slot, vector);
2397 return MarkAsCall(result, instr);
2398 }
2399
2400
DoStringAdd(HStringAdd * instr)2401 LInstruction* LChunkBuilder::DoStringAdd(HStringAdd* instr) {
2402 LOperand* context = UseFixed(instr->context(), cp);
2403 LOperand* left = UseFixed(instr->left(), x1);
2404 LOperand* right = UseFixed(instr->right(), x0);
2405
2406 LStringAdd* result = new(zone()) LStringAdd(context, left, right);
2407 return MarkAsCall(DefineFixed(result, x0), instr);
2408 }
2409
2410
DoStringCharCodeAt(HStringCharCodeAt * instr)2411 LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
2412 LOperand* string = UseRegisterAndClobber(instr->string());
2413 LOperand* index = UseRegisterAndClobber(instr->index());
2414 LOperand* context = UseAny(instr->context());
2415 LStringCharCodeAt* result =
2416 new(zone()) LStringCharCodeAt(context, string, index);
2417 return AssignPointerMap(DefineAsRegister(result));
2418 }
2419
2420
DoStringCharFromCode(HStringCharFromCode * instr)2421 LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) {
2422 LOperand* char_code = UseRegister(instr->value());
2423 LOperand* context = UseAny(instr->context());
2424 LStringCharFromCode* result =
2425 new(zone()) LStringCharFromCode(context, char_code);
2426 return AssignPointerMap(DefineAsRegister(result));
2427 }
2428
2429
DoStringCompareAndBranch(HStringCompareAndBranch * instr)2430 LInstruction* LChunkBuilder::DoStringCompareAndBranch(
2431 HStringCompareAndBranch* instr) {
2432 DCHECK(instr->left()->representation().IsTagged());
2433 DCHECK(instr->right()->representation().IsTagged());
2434 LOperand* context = UseFixed(instr->context(), cp);
2435 LOperand* left = UseFixed(instr->left(), x1);
2436 LOperand* right = UseFixed(instr->right(), x0);
2437 LStringCompareAndBranch* result =
2438 new(zone()) LStringCompareAndBranch(context, left, right);
2439 return MarkAsCall(result, instr);
2440 }
2441
2442
DoSub(HSub * instr)2443 LInstruction* LChunkBuilder::DoSub(HSub* instr) {
2444 if (instr->representation().IsSmiOrInteger32()) {
2445 DCHECK(instr->left()->representation().Equals(instr->representation()));
2446 DCHECK(instr->right()->representation().Equals(instr->representation()));
2447
2448 LInstruction* shifted_operation = TryDoOpWithShiftedRightOperand(instr);
2449 if (shifted_operation != NULL) {
2450 return shifted_operation;
2451 }
2452
2453 LOperand *left;
2454 if (instr->left()->IsConstant() &&
2455 (HConstant::cast(instr->left())->Integer32Value() == 0)) {
2456 left = UseConstant(instr->left());
2457 } else {
2458 left = UseRegisterAtStart(instr->left());
2459 }
2460 LOperand* right = UseRegisterOrConstantAtStart(instr->right());
2461 LInstruction* result = instr->representation().IsSmi() ?
2462 DefineAsRegister(new(zone()) LSubS(left, right)) :
2463 DefineAsRegister(new(zone()) LSubI(left, right));
2464 if (instr->CheckFlag(HValue::kCanOverflow)) {
2465 result = AssignEnvironment(result);
2466 }
2467 return result;
2468 } else if (instr->representation().IsDouble()) {
2469 return DoArithmeticD(Token::SUB, instr);
2470 } else {
2471 return DoArithmeticT(Token::SUB, instr);
2472 }
2473 }
2474
2475
DoThisFunction(HThisFunction * instr)2476 LInstruction* LChunkBuilder::DoThisFunction(HThisFunction* instr) {
2477 if (instr->HasNoUses()) {
2478 return NULL;
2479 } else {
2480 return DefineAsRegister(new(zone()) LThisFunction);
2481 }
2482 }
2483
2484
DoToFastProperties(HToFastProperties * instr)2485 LInstruction* LChunkBuilder::DoToFastProperties(HToFastProperties* instr) {
2486 LOperand* object = UseFixed(instr->value(), x0);
2487 LToFastProperties* result = new(zone()) LToFastProperties(object);
2488 return MarkAsCall(DefineFixed(result, x0), instr);
2489 }
2490
2491
DoTransitionElementsKind(HTransitionElementsKind * instr)2492 LInstruction* LChunkBuilder::DoTransitionElementsKind(
2493 HTransitionElementsKind* instr) {
2494 if (IsSimpleMapChangeTransition(instr->from_kind(), instr->to_kind())) {
2495 LOperand* object = UseRegister(instr->object());
2496 LTransitionElementsKind* result =
2497 new(zone()) LTransitionElementsKind(object, NULL,
2498 TempRegister(), TempRegister());
2499 return result;
2500 } else {
2501 LOperand* object = UseFixed(instr->object(), x0);
2502 LOperand* context = UseFixed(instr->context(), cp);
2503 LTransitionElementsKind* result =
2504 new(zone()) LTransitionElementsKind(object, context, NULL, NULL);
2505 return MarkAsCall(result, instr);
2506 }
2507 }
2508
2509
DoTrapAllocationMemento(HTrapAllocationMemento * instr)2510 LInstruction* LChunkBuilder::DoTrapAllocationMemento(
2511 HTrapAllocationMemento* instr) {
2512 LOperand* object = UseRegister(instr->object());
2513 LOperand* temp1 = TempRegister();
2514 LOperand* temp2 = TempRegister();
2515 LTrapAllocationMemento* result =
2516 new(zone()) LTrapAllocationMemento(object, temp1, temp2);
2517 return AssignEnvironment(result);
2518 }
2519
2520
DoMaybeGrowElements(HMaybeGrowElements * instr)2521 LInstruction* LChunkBuilder::DoMaybeGrowElements(HMaybeGrowElements* instr) {
2522 info()->MarkAsDeferredCalling();
2523 LOperand* context = UseFixed(instr->context(), cp);
2524 LOperand* object = UseRegister(instr->object());
2525 LOperand* elements = UseRegister(instr->elements());
2526 LOperand* key = UseRegisterOrConstant(instr->key());
2527 LOperand* current_capacity = UseRegisterOrConstant(instr->current_capacity());
2528
2529 LMaybeGrowElements* result = new (zone())
2530 LMaybeGrowElements(context, object, elements, key, current_capacity);
2531 DefineFixed(result, x0);
2532 return AssignPointerMap(AssignEnvironment(result));
2533 }
2534
2535
DoTypeof(HTypeof * instr)2536 LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) {
2537 LOperand* context = UseFixed(instr->context(), cp);
2538 LOperand* value = UseFixed(instr->value(), x3);
2539 LTypeof* result = new (zone()) LTypeof(context, value);
2540 return MarkAsCall(DefineFixed(result, x0), instr);
2541 }
2542
2543
DoTypeofIsAndBranch(HTypeofIsAndBranch * instr)2544 LInstruction* LChunkBuilder::DoTypeofIsAndBranch(HTypeofIsAndBranch* instr) {
2545 // We only need temp registers in some cases, but we can't dereference the
2546 // instr->type_literal() handle to test that here.
2547 LOperand* temp1 = TempRegister();
2548 LOperand* temp2 = TempRegister();
2549
2550 return new(zone()) LTypeofIsAndBranch(
2551 UseRegister(instr->value()), temp1, temp2);
2552 }
2553
2554
DoUnaryMathOperation(HUnaryMathOperation * instr)2555 LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
2556 switch (instr->op()) {
2557 case kMathAbs: {
2558 Representation r = instr->representation();
2559 if (r.IsTagged()) {
2560 // The tagged case might need to allocate a HeapNumber for the result,
2561 // so it is handled by a separate LInstruction.
2562 LOperand* context = UseFixed(instr->context(), cp);
2563 LOperand* input = UseRegister(instr->value());
2564 LOperand* temp1 = TempRegister();
2565 LOperand* temp2 = TempRegister();
2566 LOperand* temp3 = TempRegister();
2567 LInstruction* result = DefineAsRegister(
2568 new(zone()) LMathAbsTagged(context, input, temp1, temp2, temp3));
2569 return AssignEnvironment(AssignPointerMap(result));
2570 } else {
2571 LOperand* input = UseRegisterAtStart(instr->value());
2572 LInstruction* result = DefineAsRegister(new(zone()) LMathAbs(input));
2573 if (!r.IsDouble()) result = AssignEnvironment(result);
2574 return result;
2575 }
2576 }
2577 case kMathExp: {
2578 DCHECK(instr->representation().IsDouble());
2579 DCHECK(instr->value()->representation().IsDouble());
2580 LOperand* input = UseRegister(instr->value());
2581 LOperand* double_temp1 = TempDoubleRegister();
2582 LOperand* temp1 = TempRegister();
2583 LOperand* temp2 = TempRegister();
2584 LOperand* temp3 = TempRegister();
2585 LMathExp* result = new(zone()) LMathExp(input, double_temp1,
2586 temp1, temp2, temp3);
2587 return DefineAsRegister(result);
2588 }
2589 case kMathFloor: {
2590 DCHECK(instr->value()->representation().IsDouble());
2591 LOperand* input = UseRegisterAtStart(instr->value());
2592 if (instr->representation().IsInteger32()) {
2593 LMathFloorI* result = new(zone()) LMathFloorI(input);
2594 return AssignEnvironment(AssignPointerMap(DefineAsRegister(result)));
2595 } else {
2596 DCHECK(instr->representation().IsDouble());
2597 LMathFloorD* result = new(zone()) LMathFloorD(input);
2598 return DefineAsRegister(result);
2599 }
2600 }
2601 case kMathLog: {
2602 DCHECK(instr->representation().IsDouble());
2603 DCHECK(instr->value()->representation().IsDouble());
2604 LOperand* input = UseFixedDouble(instr->value(), d0);
2605 LMathLog* result = new(zone()) LMathLog(input);
2606 return MarkAsCall(DefineFixedDouble(result, d0), instr);
2607 }
2608 case kMathPowHalf: {
2609 DCHECK(instr->representation().IsDouble());
2610 DCHECK(instr->value()->representation().IsDouble());
2611 LOperand* input = UseRegister(instr->value());
2612 return DefineAsRegister(new(zone()) LMathPowHalf(input));
2613 }
2614 case kMathRound: {
2615 DCHECK(instr->value()->representation().IsDouble());
2616 LOperand* input = UseRegister(instr->value());
2617 if (instr->representation().IsInteger32()) {
2618 LOperand* temp = TempDoubleRegister();
2619 LMathRoundI* result = new(zone()) LMathRoundI(input, temp);
2620 return AssignEnvironment(DefineAsRegister(result));
2621 } else {
2622 DCHECK(instr->representation().IsDouble());
2623 LMathRoundD* result = new(zone()) LMathRoundD(input);
2624 return DefineAsRegister(result);
2625 }
2626 }
2627 case kMathFround: {
2628 DCHECK(instr->value()->representation().IsDouble());
2629 LOperand* input = UseRegister(instr->value());
2630 LMathFround* result = new (zone()) LMathFround(input);
2631 return DefineAsRegister(result);
2632 }
2633 case kMathSqrt: {
2634 DCHECK(instr->representation().IsDouble());
2635 DCHECK(instr->value()->representation().IsDouble());
2636 LOperand* input = UseRegisterAtStart(instr->value());
2637 return DefineAsRegister(new(zone()) LMathSqrt(input));
2638 }
2639 case kMathClz32: {
2640 DCHECK(instr->representation().IsInteger32());
2641 DCHECK(instr->value()->representation().IsInteger32());
2642 LOperand* input = UseRegisterAtStart(instr->value());
2643 return DefineAsRegister(new(zone()) LMathClz32(input));
2644 }
2645 default:
2646 UNREACHABLE();
2647 return NULL;
2648 }
2649 }
2650
2651
DoUnknownOSRValue(HUnknownOSRValue * instr)2652 LInstruction* LChunkBuilder::DoUnknownOSRValue(HUnknownOSRValue* instr) {
2653 // Use an index that corresponds to the location in the unoptimized frame,
2654 // which the optimized frame will subsume.
2655 int env_index = instr->index();
2656 int spill_index = 0;
2657 if (instr->environment()->is_parameter_index(env_index)) {
2658 spill_index = chunk_->GetParameterStackSlot(env_index);
2659 } else {
2660 spill_index = env_index - instr->environment()->first_local_index();
2661 if (spill_index > LUnallocated::kMaxFixedSlotIndex) {
2662 Retry(kTooManySpillSlotsNeededForOSR);
2663 spill_index = 0;
2664 }
2665 }
2666 return DefineAsSpilled(new(zone()) LUnknownOSRValue, spill_index);
2667 }
2668
2669
DoUseConst(HUseConst * instr)2670 LInstruction* LChunkBuilder::DoUseConst(HUseConst* instr) {
2671 return NULL;
2672 }
2673
2674
DoForInPrepareMap(HForInPrepareMap * instr)2675 LInstruction* LChunkBuilder::DoForInPrepareMap(HForInPrepareMap* instr) {
2676 LOperand* context = UseFixed(instr->context(), cp);
2677 // Assign object to a fixed register different from those already used in
2678 // LForInPrepareMap.
2679 LOperand* object = UseFixed(instr->enumerable(), x0);
2680 LForInPrepareMap* result = new(zone()) LForInPrepareMap(context, object);
2681 return MarkAsCall(DefineFixed(result, x0), instr, CAN_DEOPTIMIZE_EAGERLY);
2682 }
2683
2684
DoForInCacheArray(HForInCacheArray * instr)2685 LInstruction* LChunkBuilder::DoForInCacheArray(HForInCacheArray* instr) {
2686 LOperand* map = UseRegister(instr->map());
2687 return AssignEnvironment(DefineAsRegister(new(zone()) LForInCacheArray(map)));
2688 }
2689
2690
DoCheckMapValue(HCheckMapValue * instr)2691 LInstruction* LChunkBuilder::DoCheckMapValue(HCheckMapValue* instr) {
2692 LOperand* value = UseRegisterAtStart(instr->value());
2693 LOperand* map = UseRegister(instr->map());
2694 LOperand* temp = TempRegister();
2695 return AssignEnvironment(new(zone()) LCheckMapValue(value, map, temp));
2696 }
2697
2698
DoLoadFieldByIndex(HLoadFieldByIndex * instr)2699 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
2700 LOperand* object = UseRegisterAtStart(instr->object());
2701 LOperand* index = UseRegisterAndClobber(instr->index());
2702 LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
2703 LInstruction* result = DefineSameAsFirst(load);
2704 return AssignPointerMap(result);
2705 }
2706
2707
DoWrapReceiver(HWrapReceiver * instr)2708 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
2709 LOperand* receiver = UseRegister(instr->receiver());
2710 LOperand* function = UseRegister(instr->function());
2711 LWrapReceiver* result = new(zone()) LWrapReceiver(receiver, function);
2712 return AssignEnvironment(DefineAsRegister(result));
2713 }
2714
2715
DoStoreFrameContext(HStoreFrameContext * instr)2716 LInstruction* LChunkBuilder::DoStoreFrameContext(HStoreFrameContext* instr) {
2717 LOperand* context = UseRegisterAtStart(instr->context());
2718 return new(zone()) LStoreFrameContext(context);
2719 }
2720
2721
DoAllocateBlockContext(HAllocateBlockContext * instr)2722 LInstruction* LChunkBuilder::DoAllocateBlockContext(
2723 HAllocateBlockContext* instr) {
2724 LOperand* context = UseFixed(instr->context(), cp);
2725 LOperand* function = UseRegisterAtStart(instr->function());
2726 LAllocateBlockContext* result =
2727 new(zone()) LAllocateBlockContext(context, function);
2728 return MarkAsCall(DefineFixed(result, cp), instr);
2729 }
2730
2731
2732 } // namespace internal
2733 } // namespace v8
2734