Upgrade V8 to 5.1.281.57 DO NOT MERGE
FPIIM-449
Change-Id: Id981b686b4d587ac31697662eb98bb34be42ad90
(cherry picked from commit 3b9bc31999c9787eb726ecdbfd5796bfdec32a18)
diff --git a/src/crankshaft/s390/lithium-s390.cc b/src/crankshaft/s390/lithium-s390.cc
new file mode 100644
index 0000000..a18f877
--- /dev/null
+++ b/src/crankshaft/s390/lithium-s390.cc
@@ -0,0 +1,2290 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/crankshaft/s390/lithium-s390.h"
+
+#include <sstream>
+
+#include "src/crankshaft/hydrogen-osr.h"
+#include "src/crankshaft/lithium-inl.h"
+#include "src/crankshaft/s390/lithium-codegen-s390.h"
+
+namespace v8 {
+namespace internal {
+
+#define DEFINE_COMPILE(type) \
+ void L##type::CompileToNative(LCodeGen* generator) { \
+ generator->Do##type(this); \
+ }
+LITHIUM_CONCRETE_INSTRUCTION_LIST(DEFINE_COMPILE)
+#undef DEFINE_COMPILE
+
+#ifdef DEBUG
+void LInstruction::VerifyCall() {
+ // Call instructions can use only fixed registers as temporaries and
+ // outputs because all registers are blocked by the calling convention.
+ // Inputs operands must use a fixed register or use-at-start policy or
+ // a non-register policy.
+ DCHECK(Output() == NULL || LUnallocated::cast(Output())->HasFixedPolicy() ||
+ !LUnallocated::cast(Output())->HasRegisterPolicy());
+ for (UseIterator it(this); !it.Done(); it.Advance()) {
+ LUnallocated* operand = LUnallocated::cast(it.Current());
+ DCHECK(operand->HasFixedPolicy() || operand->IsUsedAtStart());
+ }
+ for (TempIterator it(this); !it.Done(); it.Advance()) {
+ LUnallocated* operand = LUnallocated::cast(it.Current());
+ DCHECK(operand->HasFixedPolicy() || !operand->HasRegisterPolicy());
+ }
+}
+#endif
+
+void LInstruction::PrintTo(StringStream* stream) {
+ stream->Add("%s ", this->Mnemonic());
+
+ PrintOutputOperandTo(stream);
+
+ PrintDataTo(stream);
+
+ if (HasEnvironment()) {
+ stream->Add(" ");
+ environment()->PrintTo(stream);
+ }
+
+ if (HasPointerMap()) {
+ stream->Add(" ");
+ pointer_map()->PrintTo(stream);
+ }
+}
+
+void LInstruction::PrintDataTo(StringStream* stream) {
+ stream->Add("= ");
+ for (int i = 0; i < InputCount(); i++) {
+ if (i > 0) stream->Add(" ");
+ if (InputAt(i) == NULL) {
+ stream->Add("NULL");
+ } else {
+ InputAt(i)->PrintTo(stream);
+ }
+ }
+}
+
+void LInstruction::PrintOutputOperandTo(StringStream* stream) {
+ if (HasResult()) result()->PrintTo(stream);
+}
+
+void LLabel::PrintDataTo(StringStream* stream) {
+ LGap::PrintDataTo(stream);
+ LLabel* rep = replacement();
+ if (rep != NULL) {
+ stream->Add(" Dead block replaced with B%d", rep->block_id());
+ }
+}
+
+bool LGap::IsRedundant() const {
+ for (int i = 0; i < 4; i++) {
+ if (parallel_moves_[i] != NULL && !parallel_moves_[i]->IsRedundant()) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+void LGap::PrintDataTo(StringStream* stream) {
+ for (int i = 0; i < 4; i++) {
+ stream->Add("(");
+ if (parallel_moves_[i] != NULL) {
+ parallel_moves_[i]->PrintDataTo(stream);
+ }
+ stream->Add(") ");
+ }
+}
+
+const char* LArithmeticD::Mnemonic() const {
+ switch (op()) {
+ case Token::ADD:
+ return "add-d";
+ case Token::SUB:
+ return "sub-d";
+ case Token::MUL:
+ return "mul-d";
+ case Token::DIV:
+ return "div-d";
+ case Token::MOD:
+ return "mod-d";
+ default:
+ UNREACHABLE();
+ return NULL;
+ }
+}
+
+const char* LArithmeticT::Mnemonic() const {
+ switch (op()) {
+ case Token::ADD:
+ return "add-t";
+ case Token::SUB:
+ return "sub-t";
+ case Token::MUL:
+ return "mul-t";
+ case Token::MOD:
+ return "mod-t";
+ case Token::DIV:
+ return "div-t";
+ case Token::BIT_AND:
+ return "bit-and-t";
+ case Token::BIT_OR:
+ return "bit-or-t";
+ case Token::BIT_XOR:
+ return "bit-xor-t";
+ case Token::ROR:
+ return "ror-t";
+ case Token::SHL:
+ return "shl-t";
+ case Token::SAR:
+ return "sar-t";
+ case Token::SHR:
+ return "shr-t";
+ default:
+ UNREACHABLE();
+ return NULL;
+ }
+}
+
+bool LGoto::HasInterestingComment(LCodeGen* gen) const {
+ return !gen->IsNextEmittedBlock(block_id());
+}
+
+void LGoto::PrintDataTo(StringStream* stream) {
+ stream->Add("B%d", block_id());
+}
+
+void LBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("B%d | B%d on ", true_block_id(), false_block_id());
+ value()->PrintTo(stream);
+}
+
+void LCompareNumericAndBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("if ");
+ left()->PrintTo(stream);
+ stream->Add(" %s ", Token::String(op()));
+ right()->PrintTo(stream);
+ stream->Add(" then B%d else B%d", true_block_id(), false_block_id());
+}
+
+void LIsStringAndBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("if is_string(");
+ value()->PrintTo(stream);
+ stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
+}
+
+void LIsSmiAndBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("if is_smi(");
+ value()->PrintTo(stream);
+ stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
+}
+
+void LIsUndetectableAndBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("if is_undetectable(");
+ value()->PrintTo(stream);
+ stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
+}
+
+void LStringCompareAndBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("if string_compare(");
+ left()->PrintTo(stream);
+ right()->PrintTo(stream);
+ stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
+}
+
+void LHasInstanceTypeAndBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("if has_instance_type(");
+ value()->PrintTo(stream);
+ stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
+}
+
+void LHasCachedArrayIndexAndBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("if has_cached_array_index(");
+ value()->PrintTo(stream);
+ stream->Add(") then B%d else B%d", true_block_id(), false_block_id());
+}
+
+void LClassOfTestAndBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("if class_of_test(");
+ value()->PrintTo(stream);
+ stream->Add(", \"%o\") then B%d else B%d", *hydrogen()->class_name(),
+ true_block_id(), false_block_id());
+}
+
+void LTypeofIsAndBranch::PrintDataTo(StringStream* stream) {
+ stream->Add("if typeof ");
+ value()->PrintTo(stream);
+ stream->Add(" == \"%s\" then B%d else B%d",
+ hydrogen()->type_literal()->ToCString().get(), true_block_id(),
+ false_block_id());
+}
+
+void LStoreCodeEntry::PrintDataTo(StringStream* stream) {
+ stream->Add(" = ");
+ function()->PrintTo(stream);
+ stream->Add(".code_entry = ");
+ code_object()->PrintTo(stream);
+}
+
+void LInnerAllocatedObject::PrintDataTo(StringStream* stream) {
+ stream->Add(" = ");
+ base_object()->PrintTo(stream);
+ stream->Add(" + ");
+ offset()->PrintTo(stream);
+}
+
+void LCallWithDescriptor::PrintDataTo(StringStream* stream) {
+ for (int i = 0; i < InputCount(); i++) {
+ InputAt(i)->PrintTo(stream);
+ stream->Add(" ");
+ }
+ stream->Add("#%d / ", arity());
+}
+
+void LLoadContextSlot::PrintDataTo(StringStream* stream) {
+ context()->PrintTo(stream);
+ stream->Add("[%d]", slot_index());
+}
+
+void LStoreContextSlot::PrintDataTo(StringStream* stream) {
+ context()->PrintTo(stream);
+ stream->Add("[%d] <- ", slot_index());
+ value()->PrintTo(stream);
+}
+
+void LInvokeFunction::PrintDataTo(StringStream* stream) {
+ stream->Add("= ");
+ function()->PrintTo(stream);
+ stream->Add(" #%d / ", arity());
+}
+
+void LCallNewArray::PrintDataTo(StringStream* stream) {
+ stream->Add("= ");
+ constructor()->PrintTo(stream);
+ stream->Add(" #%d / ", arity());
+ ElementsKind kind = hydrogen()->elements_kind();
+ stream->Add(" (%s) ", ElementsKindToString(kind));
+}
+
+void LAccessArgumentsAt::PrintDataTo(StringStream* stream) {
+ arguments()->PrintTo(stream);
+ stream->Add(" length ");
+ length()->PrintTo(stream);
+ stream->Add(" index ");
+ index()->PrintTo(stream);
+}
+
+void LStoreNamedField::PrintDataTo(StringStream* stream) {
+ object()->PrintTo(stream);
+ std::ostringstream os;
+ os << hydrogen()->access() << " <- ";
+ stream->Add(os.str().c_str());
+ value()->PrintTo(stream);
+}
+
+void LStoreNamedGeneric::PrintDataTo(StringStream* stream) {
+ object()->PrintTo(stream);
+ stream->Add(".");
+ stream->Add(String::cast(*name())->ToCString().get());
+ stream->Add(" <- ");
+ value()->PrintTo(stream);
+}
+
+void LLoadKeyed::PrintDataTo(StringStream* stream) {
+ elements()->PrintTo(stream);
+ stream->Add("[");
+ key()->PrintTo(stream);
+ if (hydrogen()->IsDehoisted()) {
+ stream->Add(" + %d]", base_offset());
+ } else {
+ stream->Add("]");
+ }
+}
+
+void LStoreKeyed::PrintDataTo(StringStream* stream) {
+ elements()->PrintTo(stream);
+ stream->Add("[");
+ key()->PrintTo(stream);
+ if (hydrogen()->IsDehoisted()) {
+ stream->Add(" + %d] <-", base_offset());
+ } else {
+ stream->Add("] <- ");
+ }
+
+ if (value() == NULL) {
+ DCHECK(hydrogen()->IsConstantHoleStore() &&
+ hydrogen()->value()->representation().IsDouble());
+ stream->Add("<the hole(nan)>");
+ } else {
+ value()->PrintTo(stream);
+ }
+}
+
+void LStoreKeyedGeneric::PrintDataTo(StringStream* stream) {
+ object()->PrintTo(stream);
+ stream->Add("[");
+ key()->PrintTo(stream);
+ stream->Add("] <- ");
+ value()->PrintTo(stream);
+}
+
+void LTransitionElementsKind::PrintDataTo(StringStream* stream) {
+ object()->PrintTo(stream);
+ stream->Add(" %p -> %p", *original_map(), *transitioned_map());
+}
+
+int LPlatformChunk::GetNextSpillIndex(RegisterKind kind) {
+ // Skip a slot if for a double-width slot.
+ if (kind == DOUBLE_REGISTERS) current_frame_slots_++;
+ return current_frame_slots_++;
+}
+
+LOperand* LPlatformChunk::GetNextSpillSlot(RegisterKind kind) {
+ int index = GetNextSpillIndex(kind);
+ if (kind == DOUBLE_REGISTERS) {
+ return LDoubleStackSlot::Create(index, zone());
+ } else {
+ DCHECK(kind == GENERAL_REGISTERS);
+ return LStackSlot::Create(index, zone());
+ }
+}
+
+LPlatformChunk* LChunkBuilder::Build() {
+ DCHECK(is_unused());
+ chunk_ = new (zone()) LPlatformChunk(info(), graph());
+ LPhase phase("L_Building chunk", chunk_);
+ status_ = BUILDING;
+
+ // If compiling for OSR, reserve space for the unoptimized frame,
+ // which will be subsumed into this frame.
+ if (graph()->has_osr()) {
+ for (int i = graph()->osr()->UnoptimizedFrameSlots(); i > 0; i--) {
+ chunk_->GetNextSpillIndex(GENERAL_REGISTERS);
+ }
+ }
+
+ const ZoneList<HBasicBlock*>* blocks = graph()->blocks();
+ for (int i = 0; i < blocks->length(); i++) {
+ HBasicBlock* next = NULL;
+ if (i < blocks->length() - 1) next = blocks->at(i + 1);
+ DoBasicBlock(blocks->at(i), next);
+ if (is_aborted()) return NULL;
+ }
+ status_ = DONE;
+ return chunk_;
+}
+
+LUnallocated* LChunkBuilder::ToUnallocated(Register reg) {
+ return new (zone()) LUnallocated(LUnallocated::FIXED_REGISTER, reg.code());
+}
+
+LUnallocated* LChunkBuilder::ToUnallocated(DoubleRegister reg) {
+ return new (zone())
+ LUnallocated(LUnallocated::FIXED_DOUBLE_REGISTER, reg.code());
+}
+
+LOperand* LChunkBuilder::UseFixed(HValue* value, Register fixed_register) {
+ return Use(value, ToUnallocated(fixed_register));
+}
+
+LOperand* LChunkBuilder::UseFixedDouble(HValue* value, DoubleRegister reg) {
+ return Use(value, ToUnallocated(reg));
+}
+
+LOperand* LChunkBuilder::UseRegister(HValue* value) {
+ return Use(value,
+ new (zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
+}
+
+LOperand* LChunkBuilder::UseRegisterAtStart(HValue* value) {
+ return Use(value, new (zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER,
+ LUnallocated::USED_AT_START));
+}
+
+LOperand* LChunkBuilder::UseTempRegister(HValue* value) {
+ return Use(value, new (zone()) LUnallocated(LUnallocated::WRITABLE_REGISTER));
+}
+
+LOperand* LChunkBuilder::Use(HValue* value) {
+ return Use(value, new (zone()) LUnallocated(LUnallocated::NONE));
+}
+
+LOperand* LChunkBuilder::UseAtStart(HValue* value) {
+ return Use(value, new (zone()) LUnallocated(LUnallocated::NONE,
+ LUnallocated::USED_AT_START));
+}
+
+LOperand* LChunkBuilder::UseOrConstant(HValue* value) {
+ return value->IsConstant()
+ ? chunk_->DefineConstantOperand(HConstant::cast(value))
+ : Use(value);
+}
+
+LOperand* LChunkBuilder::UseOrConstantAtStart(HValue* value) {
+ return value->IsConstant()
+ ? chunk_->DefineConstantOperand(HConstant::cast(value))
+ : UseAtStart(value);
+}
+
+LOperand* LChunkBuilder::UseRegisterOrConstant(HValue* value) {
+ return value->IsConstant()
+ ? chunk_->DefineConstantOperand(HConstant::cast(value))
+ : UseRegister(value);
+}
+
+LOperand* LChunkBuilder::UseRegisterOrConstantAtStart(HValue* value) {
+ return value->IsConstant()
+ ? chunk_->DefineConstantOperand(HConstant::cast(value))
+ : UseRegisterAtStart(value);
+}
+
+LOperand* LChunkBuilder::UseConstant(HValue* value) {
+ return chunk_->DefineConstantOperand(HConstant::cast(value));
+}
+
+LOperand* LChunkBuilder::UseAny(HValue* value) {
+ return value->IsConstant()
+ ? chunk_->DefineConstantOperand(HConstant::cast(value))
+ : Use(value, new (zone()) LUnallocated(LUnallocated::ANY));
+}
+
+LOperand* LChunkBuilder::Use(HValue* value, LUnallocated* operand) {
+ if (value->EmitAtUses()) {
+ HInstruction* instr = HInstruction::cast(value);
+ VisitInstruction(instr);
+ }
+ operand->set_virtual_register(value->id());
+ return operand;
+}
+
+LInstruction* LChunkBuilder::Define(LTemplateResultInstruction<1>* instr,
+ LUnallocated* result) {
+ result->set_virtual_register(current_instruction_->id());
+ instr->set_result(result);
+ return instr;
+}
+
+LInstruction* LChunkBuilder::DefineAsRegister(
+ LTemplateResultInstruction<1>* instr) {
+ return Define(instr,
+ new (zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
+}
+
+LInstruction* LChunkBuilder::DefineAsSpilled(
+ LTemplateResultInstruction<1>* instr, int index) {
+ return Define(instr,
+ new (zone()) LUnallocated(LUnallocated::FIXED_SLOT, index));
+}
+
+LInstruction* LChunkBuilder::DefineSameAsFirst(
+ LTemplateResultInstruction<1>* instr) {
+ return Define(instr,
+ new (zone()) LUnallocated(LUnallocated::SAME_AS_FIRST_INPUT));
+}
+
+LInstruction* LChunkBuilder::DefineFixed(LTemplateResultInstruction<1>* instr,
+ Register reg) {
+ return Define(instr, ToUnallocated(reg));
+}
+
+LInstruction* LChunkBuilder::DefineFixedDouble(
+ LTemplateResultInstruction<1>* instr, DoubleRegister reg) {
+ return Define(instr, ToUnallocated(reg));
+}
+
+LInstruction* LChunkBuilder::AssignEnvironment(LInstruction* instr) {
+ HEnvironment* hydrogen_env = current_block_->last_environment();
+ return LChunkBuilderBase::AssignEnvironment(instr, hydrogen_env);
+}
+
+LInstruction* LChunkBuilder::MarkAsCall(LInstruction* instr,
+ HInstruction* hinstr,
+ CanDeoptimize can_deoptimize) {
+ info()->MarkAsNonDeferredCalling();
+#ifdef DEBUG
+ instr->VerifyCall();
+#endif
+ instr->MarkAsCall();
+ instr = AssignPointerMap(instr);
+
+ // If instruction does not have side-effects lazy deoptimization
+ // after the call will try to deoptimize to the point before the call.
+ // Thus we still need to attach environment to this call even if
+ // call sequence can not deoptimize eagerly.
+ bool needs_environment = (can_deoptimize == CAN_DEOPTIMIZE_EAGERLY) ||
+ !hinstr->HasObservableSideEffects();
+ if (needs_environment && !instr->HasEnvironment()) {
+ instr = AssignEnvironment(instr);
+ // We can't really figure out if the environment is needed or not.
+ instr->environment()->set_has_been_used();
+ }
+
+ return instr;
+}
+
+LInstruction* LChunkBuilder::AssignPointerMap(LInstruction* instr) {
+ DCHECK(!instr->HasPointerMap());
+ instr->set_pointer_map(new (zone()) LPointerMap(zone()));
+ return instr;
+}
+
+LUnallocated* LChunkBuilder::TempRegister() {
+ LUnallocated* operand =
+ new (zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER);
+ int vreg = allocator_->GetVirtualRegister();
+ if (!allocator_->AllocationOk()) {
+ Abort(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister);
+ vreg = 0;
+ }
+ operand->set_virtual_register(vreg);
+ return operand;
+}
+
+LUnallocated* LChunkBuilder::TempDoubleRegister() {
+ LUnallocated* operand =
+ new (zone()) LUnallocated(LUnallocated::MUST_HAVE_DOUBLE_REGISTER);
+ int vreg = allocator_->GetVirtualRegister();
+ if (!allocator_->AllocationOk()) {
+ Abort(kOutOfVirtualRegistersWhileTryingToAllocateTempRegister);
+ vreg = 0;
+ }
+ operand->set_virtual_register(vreg);
+ return operand;
+}
+
+LOperand* LChunkBuilder::FixedTemp(Register reg) {
+ LUnallocated* operand = ToUnallocated(reg);
+ DCHECK(operand->HasFixedPolicy());
+ return operand;
+}
+
+LOperand* LChunkBuilder::FixedTemp(DoubleRegister reg) {
+ LUnallocated* operand = ToUnallocated(reg);
+ DCHECK(operand->HasFixedPolicy());
+ return operand;
+}
+
+LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) {
+ return new (zone()) LLabel(instr->block());
+}
+
+LInstruction* LChunkBuilder::DoDummyUse(HDummyUse* instr) {
+ return DefineAsRegister(new (zone()) LDummyUse(UseAny(instr->value())));
+}
+
+LInstruction* LChunkBuilder::DoEnvironmentMarker(HEnvironmentMarker* instr) {
+ UNREACHABLE();
+ return NULL;
+}
+
+LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) {
+ return AssignEnvironment(new (zone()) LDeoptimize);
+}
+
+LInstruction* LChunkBuilder::DoShift(Token::Value op,
+ HBitwiseBinaryOperation* instr) {
+ if (instr->representation().IsSmiOrInteger32()) {
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* left = UseRegisterAtStart(instr->left());
+
+ HValue* right_value = instr->right();
+ LOperand* right = NULL;
+ int constant_value = 0;
+ bool does_deopt = false;
+ if (right_value->IsConstant()) {
+ HConstant* constant = HConstant::cast(right_value);
+ right = chunk_->DefineConstantOperand(constant);
+ constant_value = constant->Integer32Value() & 0x1f;
+ // Left shifts can deoptimize if we shift by > 0 and the result cannot be
+ // truncated to smi.
+ if (instr->representation().IsSmi() && constant_value > 0) {
+ does_deopt = !instr->CheckUsesForFlag(HValue::kTruncatingToSmi);
+ }
+ } else {
+ right = UseRegisterAtStart(right_value);
+ }
+
+ // Shift operations can only deoptimize if we do a logical shift
+ // by 0 and the result cannot be truncated to int32.
+ if (op == Token::SHR && constant_value == 0) {
+ does_deopt = !instr->CheckFlag(HInstruction::kUint32);
+ }
+
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LShiftI(op, left, right, does_deopt));
+ return does_deopt ? AssignEnvironment(result) : result;
+ } else {
+ return DoArithmeticT(op, instr);
+ }
+}
+
+LInstruction* LChunkBuilder::DoArithmeticD(Token::Value op,
+ HArithmeticBinaryOperation* instr) {
+ DCHECK(instr->representation().IsDouble());
+ DCHECK(instr->left()->representation().IsDouble());
+ DCHECK(instr->right()->representation().IsDouble());
+ if (op == Token::MOD) {
+ LOperand* left = UseFixedDouble(instr->left(), d1);
+ LOperand* right = UseFixedDouble(instr->right(), d2);
+ LArithmeticD* result = new (zone()) LArithmeticD(op, left, right);
+ // We call a C function for double modulo. It can't trigger a GC. We need
+ // to use fixed result register for the call.
+ // TODO(fschneider): Allow any register as input registers.
+ return MarkAsCall(DefineFixedDouble(result, d1), instr);
+ } else {
+ LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
+ LOperand* right = UseRegisterAtStart(instr->BetterRightOperand());
+ LArithmeticD* result = new (zone()) LArithmeticD(op, left, right);
+ return DefineSameAsFirst(result);
+ }
+}
+
+LInstruction* LChunkBuilder::DoArithmeticT(Token::Value op,
+ HBinaryOperation* instr) {
+ HValue* left = instr->left();
+ HValue* right = instr->right();
+ DCHECK(left->representation().IsTagged());
+ DCHECK(right->representation().IsTagged());
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* left_operand = UseFixed(left, r3);
+ LOperand* right_operand = UseFixed(right, r2);
+ LArithmeticT* result =
+ new (zone()) LArithmeticT(op, context, left_operand, right_operand);
+ return MarkAsCall(DefineFixed(result, r2), instr);
+}
+
+void LChunkBuilder::DoBasicBlock(HBasicBlock* block, HBasicBlock* next_block) {
+ DCHECK(is_building());
+ current_block_ = block;
+ next_block_ = next_block;
+ if (block->IsStartBlock()) {
+ block->UpdateEnvironment(graph_->start_environment());
+ argument_count_ = 0;
+ } else if (block->predecessors()->length() == 1) {
+ // We have a single predecessor => copy environment and outgoing
+ // argument count from the predecessor.
+ DCHECK(block->phis()->length() == 0);
+ HBasicBlock* pred = block->predecessors()->at(0);
+ HEnvironment* last_environment = pred->last_environment();
+ DCHECK(last_environment != NULL);
+ // Only copy the environment, if it is later used again.
+ if (pred->end()->SecondSuccessor() == NULL) {
+ DCHECK(pred->end()->FirstSuccessor() == block);
+ } else {
+ if (pred->end()->FirstSuccessor()->block_id() > block->block_id() ||
+ pred->end()->SecondSuccessor()->block_id() > block->block_id()) {
+ last_environment = last_environment->Copy();
+ }
+ }
+ block->UpdateEnvironment(last_environment);
+ DCHECK(pred->argument_count() >= 0);
+ argument_count_ = pred->argument_count();
+ } else {
+ // We are at a state join => process phis.
+ HBasicBlock* pred = block->predecessors()->at(0);
+ // No need to copy the environment, it cannot be used later.
+ HEnvironment* last_environment = pred->last_environment();
+ for (int i = 0; i < block->phis()->length(); ++i) {
+ HPhi* phi = block->phis()->at(i);
+ if (phi->HasMergedIndex()) {
+ last_environment->SetValueAt(phi->merged_index(), phi);
+ }
+ }
+ for (int i = 0; i < block->deleted_phis()->length(); ++i) {
+ if (block->deleted_phis()->at(i) < last_environment->length()) {
+ last_environment->SetValueAt(block->deleted_phis()->at(i),
+ graph_->GetConstantUndefined());
+ }
+ }
+ block->UpdateEnvironment(last_environment);
+ // Pick up the outgoing argument count of one of the predecessors.
+ argument_count_ = pred->argument_count();
+ }
+ HInstruction* current = block->first();
+ int start = chunk_->instructions()->length();
+ while (current != NULL && !is_aborted()) {
+ // Code for constants in registers is generated lazily.
+ if (!current->EmitAtUses()) {
+ VisitInstruction(current);
+ }
+ current = current->next();
+ }
+ int end = chunk_->instructions()->length() - 1;
+ if (end >= start) {
+ block->set_first_instruction_index(start);
+ block->set_last_instruction_index(end);
+ }
+ block->set_argument_count(argument_count_);
+ next_block_ = NULL;
+ current_block_ = NULL;
+}
+
+void LChunkBuilder::VisitInstruction(HInstruction* current) {
+ HInstruction* old_current = current_instruction_;
+ current_instruction_ = current;
+
+ LInstruction* instr = NULL;
+ if (current->CanReplaceWithDummyUses()) {
+ if (current->OperandCount() == 0) {
+ instr = DefineAsRegister(new (zone()) LDummy());
+ } else {
+ DCHECK(!current->OperandAt(0)->IsControlInstruction());
+ instr = DefineAsRegister(new (zone())
+ LDummyUse(UseAny(current->OperandAt(0))));
+ }
+ for (int i = 1; i < current->OperandCount(); ++i) {
+ if (current->OperandAt(i)->IsControlInstruction()) continue;
+ LInstruction* dummy =
+ new (zone()) LDummyUse(UseAny(current->OperandAt(i)));
+ dummy->set_hydrogen_value(current);
+ chunk_->AddInstruction(dummy, current_block_);
+ }
+ } else {
+ HBasicBlock* successor;
+ if (current->IsControlInstruction() &&
+ HControlInstruction::cast(current)->KnownSuccessorBlock(&successor) &&
+ successor != NULL) {
+ instr = new (zone()) LGoto(successor);
+ } else {
+ instr = current->CompileToLithium(this);
+ }
+ }
+
+ argument_count_ += current->argument_delta();
+ DCHECK(argument_count_ >= 0);
+
+ if (instr != NULL) {
+ AddInstruction(instr, current);
+ }
+
+ current_instruction_ = old_current;
+}
+
+void LChunkBuilder::AddInstruction(LInstruction* instr,
+ HInstruction* hydrogen_val) {
+ // Associate the hydrogen instruction first, since we may need it for
+ // the ClobbersRegisters() or ClobbersDoubleRegisters() calls below.
+ instr->set_hydrogen_value(hydrogen_val);
+
+#if DEBUG
+ // Make sure that the lithium instruction has either no fixed register
+ // constraints in temps or the result OR no uses that are only used at
+ // start. If this invariant doesn't hold, the register allocator can decide
+ // to insert a split of a range immediately before the instruction due to an
+ // already allocated register needing to be used for the instruction's fixed
+ // register constraint. In this case, The register allocator won't see an
+ // interference between the split child and the use-at-start (it would if
+ // the it was just a plain use), so it is free to move the split child into
+ // the same register that is used for the use-at-start.
+ // See https://code.google.com/p/chromium/issues/detail?id=201590
+ if (!(instr->ClobbersRegisters() &&
+ instr->ClobbersDoubleRegisters(isolate()))) {
+ int fixed = 0;
+ int used_at_start = 0;
+ for (UseIterator it(instr); !it.Done(); it.Advance()) {
+ LUnallocated* operand = LUnallocated::cast(it.Current());
+ if (operand->IsUsedAtStart()) ++used_at_start;
+ }
+ if (instr->Output() != NULL) {
+ if (LUnallocated::cast(instr->Output())->HasFixedPolicy()) ++fixed;
+ }
+ for (TempIterator it(instr); !it.Done(); it.Advance()) {
+ LUnallocated* operand = LUnallocated::cast(it.Current());
+ if (operand->HasFixedPolicy()) ++fixed;
+ }
+ DCHECK(fixed == 0 || used_at_start == 0);
+ }
+#endif
+
+ if (FLAG_stress_pointer_maps && !instr->HasPointerMap()) {
+ instr = AssignPointerMap(instr);
+ }
+ if (FLAG_stress_environments && !instr->HasEnvironment()) {
+ instr = AssignEnvironment(instr);
+ }
+ chunk_->AddInstruction(instr, current_block_);
+
+ CreateLazyBailoutForCall(current_block_, instr, hydrogen_val);
+}
+
+LInstruction* LChunkBuilder::DoPrologue(HPrologue* instr) {
+ LInstruction* result = new (zone()) LPrologue();
+ if (info_->num_heap_slots() > 0) {
+ result = MarkAsCall(result, instr);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoGoto(HGoto* instr) {
+ return new (zone()) LGoto(instr->FirstSuccessor());
+}
+
+LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
+ HValue* value = instr->value();
+ Representation r = value->representation();
+ HType type = value->type();
+ ToBooleanICStub::Types expected = instr->expected_input_types();
+ if (expected.IsEmpty()) expected = ToBooleanICStub::Types::Generic();
+
+ bool easy_case = !r.IsTagged() || type.IsBoolean() || type.IsSmi() ||
+ type.IsJSArray() || type.IsHeapNumber() || type.IsString();
+ LInstruction* branch = new (zone()) LBranch(UseRegister(value));
+ if (!easy_case &&
+ ((!expected.Contains(ToBooleanICStub::SMI) && expected.NeedsMap()) ||
+ !expected.IsGeneric())) {
+ branch = AssignEnvironment(branch);
+ }
+ return branch;
+}
+
+LInstruction* LChunkBuilder::DoDebugBreak(HDebugBreak* instr) {
+ return new (zone()) LDebugBreak();
+}
+
+LInstruction* LChunkBuilder::DoCompareMap(HCompareMap* instr) {
+ DCHECK(instr->value()->representation().IsTagged());
+ LOperand* value = UseRegister(instr->value());
+ LOperand* temp = TempRegister();
+ return new (zone()) LCmpMapAndBranch(value, temp);
+}
+
+LInstruction* LChunkBuilder::DoArgumentsLength(HArgumentsLength* instr) {
+ info()->MarkAsRequiresFrame();
+ LOperand* value = UseRegister(instr->value());
+ return DefineAsRegister(new (zone()) LArgumentsLength(value));
+}
+
+LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* elems) {
+ info()->MarkAsRequiresFrame();
+ return DefineAsRegister(new (zone()) LArgumentsElements);
+}
+
+LInstruction* LChunkBuilder::DoInstanceOf(HInstanceOf* instr) {
+ LOperand* left =
+ UseFixed(instr->left(), InstanceOfDescriptor::LeftRegister());
+ LOperand* right =
+ UseFixed(instr->right(), InstanceOfDescriptor::RightRegister());
+ LOperand* context = UseFixed(instr->context(), cp);
+ LInstanceOf* result = new (zone()) LInstanceOf(context, left, right);
+ return MarkAsCall(DefineFixed(result, r2), instr);
+}
+
+LInstruction* LChunkBuilder::DoHasInPrototypeChainAndBranch(
+ HHasInPrototypeChainAndBranch* instr) {
+ LOperand* object = UseRegister(instr->object());
+ LOperand* prototype = UseRegister(instr->prototype());
+ LHasInPrototypeChainAndBranch* result =
+ new (zone()) LHasInPrototypeChainAndBranch(object, prototype);
+ return AssignEnvironment(result);
+}
+
+LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
+ LOperand* receiver = UseRegisterAtStart(instr->receiver());
+ LOperand* function = UseRegisterAtStart(instr->function());
+ LWrapReceiver* result = new (zone()) LWrapReceiver(receiver, function);
+ return AssignEnvironment(DefineAsRegister(result));
+}
+
+LInstruction* LChunkBuilder::DoApplyArguments(HApplyArguments* instr) {
+ LOperand* function = UseFixed(instr->function(), r3);
+ LOperand* receiver = UseFixed(instr->receiver(), r2);
+ LOperand* length = UseFixed(instr->length(), r4);
+ LOperand* elements = UseFixed(instr->elements(), r5);
+ LApplyArguments* result =
+ new (zone()) LApplyArguments(function, receiver, length, elements);
+ return MarkAsCall(DefineFixed(result, r2), instr, CAN_DEOPTIMIZE_EAGERLY);
+}
+
+LInstruction* LChunkBuilder::DoPushArguments(HPushArguments* instr) {
+ int argc = instr->OperandCount();
+ for (int i = 0; i < argc; ++i) {
+ LOperand* argument = Use(instr->argument(i));
+ AddInstruction(new (zone()) LPushArgument(argument), instr);
+ }
+ return NULL;
+}
+
+LInstruction* LChunkBuilder::DoStoreCodeEntry(
+ HStoreCodeEntry* store_code_entry) {
+ LOperand* function = UseRegister(store_code_entry->function());
+ LOperand* code_object = UseTempRegister(store_code_entry->code_object());
+ return new (zone()) LStoreCodeEntry(function, code_object);
+}
+
+LInstruction* LChunkBuilder::DoInnerAllocatedObject(
+ HInnerAllocatedObject* instr) {
+ LOperand* base_object = UseRegisterAtStart(instr->base_object());
+ LOperand* offset = UseRegisterOrConstantAtStart(instr->offset());
+ return DefineAsRegister(new (zone())
+ LInnerAllocatedObject(base_object, offset));
+}
+
+LInstruction* LChunkBuilder::DoThisFunction(HThisFunction* instr) {
+ return instr->HasNoUses() ? NULL
+ : DefineAsRegister(new (zone()) LThisFunction);
+}
+
+LInstruction* LChunkBuilder::DoContext(HContext* instr) {
+ if (instr->HasNoUses()) return NULL;
+
+ if (info()->IsStub()) {
+ return DefineFixed(new (zone()) LContext, cp);
+ }
+
+ return DefineAsRegister(new (zone()) LContext);
+}
+
+LInstruction* LChunkBuilder::DoDeclareGlobals(HDeclareGlobals* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ return MarkAsCall(new (zone()) LDeclareGlobals(context), instr);
+}
+
+LInstruction* LChunkBuilder::DoCallWithDescriptor(HCallWithDescriptor* instr) {
+ CallInterfaceDescriptor descriptor = instr->descriptor();
+
+ LOperand* target = UseRegisterOrConstantAtStart(instr->target());
+ ZoneList<LOperand*> ops(instr->OperandCount(), zone());
+ // Target
+ ops.Add(target, zone());
+ // Context
+ LOperand* op = UseFixed(instr->OperandAt(1), cp);
+ ops.Add(op, zone());
+ // Other register parameters
+ for (int i = LCallWithDescriptor::kImplicitRegisterParameterCount;
+ i < instr->OperandCount(); i++) {
+ op =
+ UseFixed(instr->OperandAt(i),
+ descriptor.GetRegisterParameter(
+ i - LCallWithDescriptor::kImplicitRegisterParameterCount));
+ ops.Add(op, zone());
+ }
+
+ LCallWithDescriptor* result =
+ new (zone()) LCallWithDescriptor(descriptor, ops, zone());
+ if (instr->syntactic_tail_call_mode() == TailCallMode::kAllow) {
+ result->MarkAsSyntacticTailCall();
+ }
+ return MarkAsCall(DefineFixed(result, r2), instr);
+}
+
+LInstruction* LChunkBuilder::DoInvokeFunction(HInvokeFunction* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* function = UseFixed(instr->function(), r3);
+ LInvokeFunction* result = new (zone()) LInvokeFunction(context, function);
+ if (instr->syntactic_tail_call_mode() == TailCallMode::kAllow) {
+ result->MarkAsSyntacticTailCall();
+ }
+ return MarkAsCall(DefineFixed(result, r2), instr, CANNOT_DEOPTIMIZE_EAGERLY);
+}
+
+LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
+ switch (instr->op()) {
+ case kMathFloor:
+ return DoMathFloor(instr);
+ case kMathRound:
+ return DoMathRound(instr);
+ case kMathFround:
+ return DoMathFround(instr);
+ case kMathAbs:
+ return DoMathAbs(instr);
+ case kMathLog:
+ return DoMathLog(instr);
+ case kMathExp:
+ return DoMathExp(instr);
+ case kMathSqrt:
+ return DoMathSqrt(instr);
+ case kMathPowHalf:
+ return DoMathPowHalf(instr);
+ case kMathClz32:
+ return DoMathClz32(instr);
+ default:
+ UNREACHABLE();
+ return NULL;
+ }
+}
+
+LInstruction* LChunkBuilder::DoMathFloor(HUnaryMathOperation* instr) {
+ LOperand* input = UseRegister(instr->value());
+ LMathFloor* result = new (zone()) LMathFloor(input);
+ return AssignEnvironment(AssignPointerMap(DefineAsRegister(result)));
+}
+
+LInstruction* LChunkBuilder::DoMathRound(HUnaryMathOperation* instr) {
+ LOperand* input = UseRegister(instr->value());
+ LOperand* temp = TempDoubleRegister();
+ LMathRound* result = new (zone()) LMathRound(input, temp);
+ return AssignEnvironment(DefineAsRegister(result));
+}
+
+LInstruction* LChunkBuilder::DoMathFround(HUnaryMathOperation* instr) {
+ LOperand* input = UseRegister(instr->value());
+ LMathFround* result = new (zone()) LMathFround(input);
+ return DefineAsRegister(result);
+}
+
+LInstruction* LChunkBuilder::DoMathAbs(HUnaryMathOperation* instr) {
+ Representation r = instr->value()->representation();
+ LOperand* context = (r.IsDouble() || r.IsSmiOrInteger32())
+ ? NULL
+ : UseFixed(instr->context(), cp);
+ LOperand* input = UseRegister(instr->value());
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LMathAbs(context, input));
+ if (!r.IsDouble() && !r.IsSmiOrInteger32()) result = AssignPointerMap(result);
+ if (!r.IsDouble()) result = AssignEnvironment(result);
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoMathLog(HUnaryMathOperation* instr) {
+ DCHECK(instr->representation().IsDouble());
+ DCHECK(instr->value()->representation().IsDouble());
+ LOperand* input = UseFixedDouble(instr->value(), d1);
+ return MarkAsCall(DefineFixedDouble(new (zone()) LMathLog(input), d1), instr);
+}
+
+LInstruction* LChunkBuilder::DoMathClz32(HUnaryMathOperation* instr) {
+ LOperand* input = UseRegisterAtStart(instr->value());
+ LMathClz32* result = new (zone()) LMathClz32(input);
+ return DefineAsRegister(result);
+}
+
+LInstruction* LChunkBuilder::DoMathExp(HUnaryMathOperation* instr) {
+ DCHECK(instr->representation().IsDouble());
+ DCHECK(instr->value()->representation().IsDouble());
+ LOperand* input = UseRegister(instr->value());
+ LOperand* temp1 = TempRegister();
+ LOperand* temp2 = TempRegister();
+ LOperand* double_temp = TempDoubleRegister();
+ LMathExp* result = new (zone()) LMathExp(input, double_temp, temp1, temp2);
+ return DefineAsRegister(result);
+}
+
+LInstruction* LChunkBuilder::DoMathSqrt(HUnaryMathOperation* instr) {
+ LOperand* input = UseRegisterAtStart(instr->value());
+ LMathSqrt* result = new (zone()) LMathSqrt(input);
+ return DefineAsRegister(result);
+}
+
+LInstruction* LChunkBuilder::DoMathPowHalf(HUnaryMathOperation* instr) {
+ LOperand* input = UseRegisterAtStart(instr->value());
+ LMathPowHalf* result = new (zone()) LMathPowHalf(input);
+ return DefineAsRegister(result);
+}
+
+LInstruction* LChunkBuilder::DoCallNewArray(HCallNewArray* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* constructor = UseFixed(instr->constructor(), r3);
+ LCallNewArray* result = new (zone()) LCallNewArray(context, constructor);
+ return MarkAsCall(DefineFixed(result, r2), instr);
+}
+
+LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ return MarkAsCall(DefineFixed(new (zone()) LCallRuntime(context), r2), instr);
+}
+
+LInstruction* LChunkBuilder::DoRor(HRor* instr) {
+ return DoShift(Token::ROR, instr);
+}
+
+LInstruction* LChunkBuilder::DoShr(HShr* instr) {
+ return DoShift(Token::SHR, instr);
+}
+
+LInstruction* LChunkBuilder::DoSar(HSar* instr) {
+ return DoShift(Token::SAR, instr);
+}
+
+LInstruction* LChunkBuilder::DoShl(HShl* instr) {
+ return DoShift(Token::SHL, instr);
+}
+
+LInstruction* LChunkBuilder::DoBitwise(HBitwise* instr) {
+ if (instr->representation().IsSmiOrInteger32()) {
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ DCHECK(instr->CheckFlag(HValue::kTruncatingToInt32));
+
+ LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
+ LOperand* right = UseOrConstantAtStart(instr->BetterRightOperand());
+ return DefineAsRegister(new (zone()) LBitI(left, right));
+ } else {
+ return DoArithmeticT(instr->op(), instr);
+ }
+}
+
+LInstruction* LChunkBuilder::DoDivByPowerOf2I(HDiv* instr) {
+ DCHECK(instr->representation().IsSmiOrInteger32());
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* dividend = UseRegister(instr->left());
+ int32_t divisor = instr->right()->GetInteger32Constant();
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LDivByPowerOf2I(dividend, divisor));
+ if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
+ (instr->CheckFlag(HValue::kCanOverflow) && divisor == -1) ||
+ (!instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32) &&
+ divisor != 1 && divisor != -1)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoDivByConstI(HDiv* instr) {
+ DCHECK(instr->representation().IsInteger32());
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* dividend = UseRegister(instr->left());
+ int32_t divisor = instr->right()->GetInteger32Constant();
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LDivByConstI(dividend, divisor));
+ if (divisor == 0 ||
+ (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
+ !instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoDivI(HDiv* instr) {
+ DCHECK(instr->representation().IsSmiOrInteger32());
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* dividend = UseRegister(instr->left());
+ LOperand* divisor = UseRegister(instr->right());
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LDivI(dividend, divisor));
+ if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
+ instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
+ (instr->CheckFlag(HValue::kCanOverflow) &&
+ !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32)) ||
+ (!instr->IsMathFloorOfDiv() &&
+ !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32))) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
+ if (instr->representation().IsSmiOrInteger32()) {
+ if (instr->RightIsPowerOf2()) {
+ return DoDivByPowerOf2I(instr);
+ } else if (instr->right()->IsConstant()) {
+ return DoDivByConstI(instr);
+ } else {
+ return DoDivI(instr);
+ }
+ } else if (instr->representation().IsDouble()) {
+ return DoArithmeticD(Token::DIV, instr);
+ } else {
+ return DoArithmeticT(Token::DIV, instr);
+ }
+}
+
+LInstruction* LChunkBuilder::DoFlooringDivByPowerOf2I(HMathFloorOfDiv* instr) {
+ LOperand* dividend = UseRegisterAtStart(instr->left());
+ int32_t divisor = instr->right()->GetInteger32Constant();
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LFlooringDivByPowerOf2I(dividend, divisor));
+ if ((instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) ||
+ (instr->CheckFlag(HValue::kLeftCanBeMinInt) && divisor == -1)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoFlooringDivByConstI(HMathFloorOfDiv* instr) {
+ DCHECK(instr->representation().IsInteger32());
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* dividend = UseRegister(instr->left());
+ int32_t divisor = instr->right()->GetInteger32Constant();
+ LOperand* temp =
+ ((divisor > 0 && !instr->CheckFlag(HValue::kLeftCanBeNegative)) ||
+ (divisor < 0 && !instr->CheckFlag(HValue::kLeftCanBePositive)))
+ ? NULL
+ : TempRegister();
+ LInstruction* result = DefineAsRegister(
+ new (zone()) LFlooringDivByConstI(dividend, divisor, temp));
+ if (divisor == 0 ||
+ (instr->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoFlooringDivI(HMathFloorOfDiv* instr) {
+ DCHECK(instr->representation().IsSmiOrInteger32());
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* dividend = UseRegister(instr->left());
+ LOperand* divisor = UseRegister(instr->right());
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LFlooringDivI(dividend, divisor));
+ if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
+ instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
+ (instr->CheckFlag(HValue::kCanOverflow) &&
+ !instr->CheckFlag(HValue::kAllUsesTruncatingToInt32))) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoMathFloorOfDiv(HMathFloorOfDiv* instr) {
+ if (instr->RightIsPowerOf2()) {
+ return DoFlooringDivByPowerOf2I(instr);
+ } else if (instr->right()->IsConstant()) {
+ return DoFlooringDivByConstI(instr);
+ } else {
+ return DoFlooringDivI(instr);
+ }
+}
+
+LInstruction* LChunkBuilder::DoModByPowerOf2I(HMod* instr) {
+ DCHECK(instr->representation().IsSmiOrInteger32());
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* dividend = UseRegisterAtStart(instr->left());
+ int32_t divisor = instr->right()->GetInteger32Constant();
+ LInstruction* result =
+ DefineSameAsFirst(new (zone()) LModByPowerOf2I(dividend, divisor));
+ if (instr->CheckFlag(HValue::kLeftCanBeNegative) &&
+ instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoModByConstI(HMod* instr) {
+ DCHECK(instr->representation().IsSmiOrInteger32());
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* dividend = UseRegister(instr->left());
+ int32_t divisor = instr->right()->GetInteger32Constant();
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LModByConstI(dividend, divisor));
+ if (divisor == 0 || instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoModI(HMod* instr) {
+ DCHECK(instr->representation().IsSmiOrInteger32());
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* dividend = UseRegister(instr->left());
+ LOperand* divisor = UseRegister(instr->right());
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LModI(dividend, divisor));
+ if (instr->CheckFlag(HValue::kCanBeDivByZero) ||
+ instr->CheckFlag(HValue::kBailoutOnMinusZero)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoMod(HMod* instr) {
+ if (instr->representation().IsSmiOrInteger32()) {
+ if (instr->RightIsPowerOf2()) {
+ return DoModByPowerOf2I(instr);
+ } else if (instr->right()->IsConstant()) {
+ return DoModByConstI(instr);
+ } else {
+ return DoModI(instr);
+ }
+ } else if (instr->representation().IsDouble()) {
+ return DoArithmeticD(Token::MOD, instr);
+ } else {
+ return DoArithmeticT(Token::MOD, instr);
+ }
+}
+
+LInstruction* LChunkBuilder::DoMul(HMul* instr) {
+ if (instr->representation().IsSmiOrInteger32()) {
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ HValue* left = instr->BetterLeftOperand();
+ HValue* right = instr->BetterRightOperand();
+ LOperand* left_op;
+ LOperand* right_op;
+ bool can_overflow = instr->CheckFlag(HValue::kCanOverflow);
+ bool bailout_on_minus_zero = instr->CheckFlag(HValue::kBailoutOnMinusZero);
+
+ int32_t constant_value = 0;
+ if (right->IsConstant()) {
+ HConstant* constant = HConstant::cast(right);
+ constant_value = constant->Integer32Value();
+ // Constants -1, 0 and 1 can be optimized if the result can overflow.
+ // For other constants, it can be optimized only without overflow.
+ if (!can_overflow || ((constant_value >= -1) && (constant_value <= 1))) {
+ left_op = UseRegisterAtStart(left);
+ right_op = UseConstant(right);
+ } else {
+ if (bailout_on_minus_zero) {
+ left_op = UseRegister(left);
+ } else {
+ left_op = UseRegisterAtStart(left);
+ }
+ right_op = UseRegister(right);
+ }
+ } else {
+ if (bailout_on_minus_zero) {
+ left_op = UseRegister(left);
+ } else {
+ left_op = UseRegisterAtStart(left);
+ }
+ right_op = UseRegister(right);
+ }
+ LMulI* mul = new (zone()) LMulI(left_op, right_op);
+ if (right_op->IsConstantOperand()
+ ? ((can_overflow && constant_value == -1) ||
+ (bailout_on_minus_zero && constant_value <= 0))
+ : (can_overflow || bailout_on_minus_zero)) {
+ AssignEnvironment(mul);
+ }
+ return DefineAsRegister(mul);
+
+ } else if (instr->representation().IsDouble()) {
+ return DoArithmeticD(Token::MUL, instr);
+ } else {
+ return DoArithmeticT(Token::MUL, instr);
+ }
+}
+
+LInstruction* LChunkBuilder::DoSub(HSub* instr) {
+ if (instr->representation().IsSmiOrInteger32()) {
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+
+ if (instr->left()->IsConstant() &&
+ !instr->CheckFlag(HValue::kCanOverflow)) {
+ // If lhs is constant, do reverse subtraction instead.
+ return DoRSub(instr);
+ }
+
+ LOperand* left = UseRegisterAtStart(instr->left());
+ LOperand* right = UseOrConstantAtStart(instr->right());
+ LSubI* sub = new (zone()) LSubI(left, right);
+ LInstruction* result = DefineAsRegister(sub);
+ if (instr->CheckFlag(HValue::kCanOverflow)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+ } else if (instr->representation().IsDouble()) {
+ return DoArithmeticD(Token::SUB, instr);
+ } else {
+ return DoArithmeticT(Token::SUB, instr);
+ }
+}
+
+LInstruction* LChunkBuilder::DoRSub(HSub* instr) {
+ DCHECK(instr->representation().IsSmiOrInteger32());
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ DCHECK(!instr->CheckFlag(HValue::kCanOverflow));
+
+ // Note: The lhs of the subtraction becomes the rhs of the
+ // reverse-subtraction.
+ LOperand* left = UseRegisterAtStart(instr->right());
+ LOperand* right = UseOrConstantAtStart(instr->left());
+ LRSubI* rsb = new (zone()) LRSubI(left, right);
+ LInstruction* result = DefineAsRegister(rsb);
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoMultiplyAdd(HMul* mul, HValue* addend) {
+ LOperand* multiplier_op = UseRegister(mul->left());
+ LOperand* multiplicand_op = UseRegister(mul->right());
+ LOperand* addend_op = UseRegister(addend);
+ return DefineAsRegister(
+ new (zone()) LMultiplyAddD(addend_op, multiplier_op, multiplicand_op));
+}
+
+LInstruction* LChunkBuilder::DoMultiplySub(HValue* minuend, HMul* mul) {
+ LOperand* minuend_op = UseRegister(minuend);
+ LOperand* multiplier_op = UseRegister(mul->left());
+ LOperand* multiplicand_op = UseRegister(mul->right());
+
+ return DefineAsRegister(
+ new (zone()) LMultiplySubD(minuend_op, multiplier_op, multiplicand_op));
+}
+
+LInstruction* LChunkBuilder::DoAdd(HAdd* instr) {
+ if (instr->representation().IsSmiOrInteger32()) {
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ LOperand* left = UseRegisterAtStart(instr->BetterLeftOperand());
+ LOperand* right = UseOrConstantAtStart(instr->BetterRightOperand());
+ LAddI* add = new (zone()) LAddI(left, right);
+ LInstruction* result = DefineAsRegister(add);
+ if (instr->CheckFlag(HValue::kCanOverflow)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+ } else if (instr->representation().IsExternal()) {
+ DCHECK(instr->IsConsistentExternalRepresentation());
+ DCHECK(!instr->CheckFlag(HValue::kCanOverflow));
+ LOperand* left = UseRegisterAtStart(instr->left());
+ LOperand* right = UseOrConstantAtStart(instr->right());
+ LAddI* add = new (zone()) LAddI(left, right);
+ LInstruction* result = DefineAsRegister(add);
+ return result;
+ } else if (instr->representation().IsDouble()) {
+ return DoArithmeticD(Token::ADD, instr);
+ } else {
+ return DoArithmeticT(Token::ADD, instr);
+ }
+}
+
+LInstruction* LChunkBuilder::DoMathMinMax(HMathMinMax* instr) {
+ LOperand* left = NULL;
+ LOperand* right = NULL;
+ if (instr->representation().IsSmiOrInteger32()) {
+ DCHECK(instr->left()->representation().Equals(instr->representation()));
+ DCHECK(instr->right()->representation().Equals(instr->representation()));
+ left = UseRegisterAtStart(instr->BetterLeftOperand());
+ right = UseOrConstantAtStart(instr->BetterRightOperand());
+ } else {
+ DCHECK(instr->representation().IsDouble());
+ DCHECK(instr->left()->representation().IsDouble());
+ DCHECK(instr->right()->representation().IsDouble());
+ left = UseRegister(instr->left());
+ right = UseRegister(instr->right());
+ }
+ return DefineAsRegister(new (zone()) LMathMinMax(left, right));
+}
+
+LInstruction* LChunkBuilder::DoPower(HPower* instr) {
+ DCHECK(instr->representation().IsDouble());
+ // We call a C function for double power. It can't trigger a GC.
+ // We need to use fixed result register for the call.
+ Representation exponent_type = instr->right()->representation();
+ DCHECK(instr->left()->representation().IsDouble());
+ LOperand* left = UseFixedDouble(instr->left(), d1);
+ LOperand* right = exponent_type.IsDouble()
+ ? UseFixedDouble(instr->right(), d2)
+ : UseFixed(instr->right(), r4);
+ LPower* result = new (zone()) LPower(left, right);
+ return MarkAsCall(DefineFixedDouble(result, d3), instr,
+ CAN_DEOPTIMIZE_EAGERLY);
+}
+
+LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
+ DCHECK(instr->left()->representation().IsTagged());
+ DCHECK(instr->right()->representation().IsTagged());
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* left = UseFixed(instr->left(), r3);
+ LOperand* right = UseFixed(instr->right(), r2);
+ LCmpT* result = new (zone()) LCmpT(context, left, right);
+ return MarkAsCall(DefineFixed(result, r2), instr);
+}
+
+LInstruction* LChunkBuilder::DoCompareNumericAndBranch(
+ HCompareNumericAndBranch* instr) {
+ Representation r = instr->representation();
+ if (r.IsSmiOrInteger32()) {
+ DCHECK(instr->left()->representation().Equals(r));
+ DCHECK(instr->right()->representation().Equals(r));
+ LOperand* left = UseRegisterOrConstantAtStart(instr->left());
+ LOperand* right = UseRegisterOrConstantAtStart(instr->right());
+ return new (zone()) LCompareNumericAndBranch(left, right);
+ } else {
+ DCHECK(r.IsDouble());
+ DCHECK(instr->left()->representation().IsDouble());
+ DCHECK(instr->right()->representation().IsDouble());
+ LOperand* left = UseRegisterAtStart(instr->left());
+ LOperand* right = UseRegisterAtStart(instr->right());
+ return new (zone()) LCompareNumericAndBranch(left, right);
+ }
+}
+
+LInstruction* LChunkBuilder::DoCompareObjectEqAndBranch(
+ HCompareObjectEqAndBranch* instr) {
+ LOperand* left = UseRegisterAtStart(instr->left());
+ LOperand* right = UseRegisterAtStart(instr->right());
+ return new (zone()) LCmpObjectEqAndBranch(left, right);
+}
+
+LInstruction* LChunkBuilder::DoCompareHoleAndBranch(
+ HCompareHoleAndBranch* instr) {
+ LOperand* value = UseRegisterAtStart(instr->value());
+ return new (zone()) LCmpHoleAndBranch(value);
+}
+
+LInstruction* LChunkBuilder::DoIsStringAndBranch(HIsStringAndBranch* instr) {
+ DCHECK(instr->value()->representation().IsTagged());
+ LOperand* value = UseRegisterAtStart(instr->value());
+ LOperand* temp = TempRegister();
+ return new (zone()) LIsStringAndBranch(value, temp);
+}
+
+LInstruction* LChunkBuilder::DoIsSmiAndBranch(HIsSmiAndBranch* instr) {
+ DCHECK(instr->value()->representation().IsTagged());
+ return new (zone()) LIsSmiAndBranch(Use(instr->value()));
+}
+
+LInstruction* LChunkBuilder::DoIsUndetectableAndBranch(
+ HIsUndetectableAndBranch* instr) {
+ DCHECK(instr->value()->representation().IsTagged());
+ LOperand* value = UseRegisterAtStart(instr->value());
+ return new (zone()) LIsUndetectableAndBranch(value, TempRegister());
+}
+
+LInstruction* LChunkBuilder::DoStringCompareAndBranch(
+ HStringCompareAndBranch* instr) {
+ DCHECK(instr->left()->representation().IsTagged());
+ DCHECK(instr->right()->representation().IsTagged());
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* left = UseFixed(instr->left(), r3);
+ LOperand* right = UseFixed(instr->right(), r2);
+ LStringCompareAndBranch* result =
+ new (zone()) LStringCompareAndBranch(context, left, right);
+ return MarkAsCall(result, instr);
+}
+
+LInstruction* LChunkBuilder::DoHasInstanceTypeAndBranch(
+ HHasInstanceTypeAndBranch* instr) {
+ DCHECK(instr->value()->representation().IsTagged());
+ LOperand* value = UseRegisterAtStart(instr->value());
+ return new (zone()) LHasInstanceTypeAndBranch(value);
+}
+
+LInstruction* LChunkBuilder::DoGetCachedArrayIndex(
+ HGetCachedArrayIndex* instr) {
+ DCHECK(instr->value()->representation().IsTagged());
+ LOperand* value = UseRegisterAtStart(instr->value());
+
+ return DefineAsRegister(new (zone()) LGetCachedArrayIndex(value));
+}
+
+LInstruction* LChunkBuilder::DoHasCachedArrayIndexAndBranch(
+ HHasCachedArrayIndexAndBranch* instr) {
+ DCHECK(instr->value()->representation().IsTagged());
+ return new (zone())
+ LHasCachedArrayIndexAndBranch(UseRegisterAtStart(instr->value()));
+}
+
+LInstruction* LChunkBuilder::DoClassOfTestAndBranch(
+ HClassOfTestAndBranch* instr) {
+ DCHECK(instr->value()->representation().IsTagged());
+ LOperand* value = UseRegister(instr->value());
+ return new (zone()) LClassOfTestAndBranch(value, TempRegister());
+}
+
+LInstruction* LChunkBuilder::DoSeqStringGetChar(HSeqStringGetChar* instr) {
+ LOperand* string = UseRegisterAtStart(instr->string());
+ LOperand* index = UseRegisterOrConstantAtStart(instr->index());
+ return DefineAsRegister(new (zone()) LSeqStringGetChar(string, index));
+}
+
+LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
+ LOperand* string = UseRegisterAtStart(instr->string());
+ LOperand* index = FLAG_debug_code
+ ? UseRegisterAtStart(instr->index())
+ : UseRegisterOrConstantAtStart(instr->index());
+ LOperand* value = UseRegisterAtStart(instr->value());
+ LOperand* context = FLAG_debug_code ? UseFixed(instr->context(), cp) : NULL;
+ return new (zone()) LSeqStringSetChar(context, string, index, value);
+}
+
+LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
+ if (!FLAG_debug_code && instr->skip_check()) return NULL;
+ LOperand* index = UseRegisterOrConstantAtStart(instr->index());
+ LOperand* length = !index->IsConstantOperand()
+ ? UseRegisterOrConstantAtStart(instr->length())
+ : UseRegisterAtStart(instr->length());
+ LInstruction* result = new (zone()) LBoundsCheck(index, length);
+ if (!FLAG_debug_code || !instr->skip_check()) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoAbnormalExit(HAbnormalExit* instr) {
+ // The control instruction marking the end of a block that completed
+ // abruptly (e.g., threw an exception). There is nothing specific to do.
+ return NULL;
+}
+
+LInstruction* LChunkBuilder::DoUseConst(HUseConst* instr) { return NULL; }
+
+LInstruction* LChunkBuilder::DoForceRepresentation(HForceRepresentation* bad) {
+ // All HForceRepresentation instructions should be eliminated in the
+ // representation change phase of Hydrogen.
+ UNREACHABLE();
+ return NULL;
+}
+
+LInstruction* LChunkBuilder::DoChange(HChange* instr) {
+ Representation from = instr->from();
+ Representation to = instr->to();
+ HValue* val = instr->value();
+ if (from.IsSmi()) {
+ if (to.IsTagged()) {
+ LOperand* value = UseRegister(val);
+ return DefineSameAsFirst(new (zone()) LDummyUse(value));
+ }
+ from = Representation::Tagged();
+ }
+ if (from.IsTagged()) {
+ if (to.IsDouble()) {
+ LOperand* value = UseRegister(val);
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LNumberUntagD(value));
+ if (!val->representation().IsSmi()) result = AssignEnvironment(result);
+ return result;
+ } else if (to.IsSmi()) {
+ LOperand* value = UseRegister(val);
+ if (val->type().IsSmi()) {
+ return DefineSameAsFirst(new (zone()) LDummyUse(value));
+ }
+ return AssignEnvironment(
+ DefineSameAsFirst(new (zone()) LCheckSmi(value)));
+ } else {
+ DCHECK(to.IsInteger32());
+ if (val->type().IsSmi() || val->representation().IsSmi()) {
+ LOperand* value = UseRegisterAtStart(val);
+ return DefineAsRegister(new (zone()) LSmiUntag(value, false));
+ } else {
+ LOperand* value = UseRegister(val);
+ LOperand* temp1 = TempRegister();
+ LOperand* temp2 = TempDoubleRegister();
+ LInstruction* result =
+ DefineSameAsFirst(new (zone()) LTaggedToI(value, temp1, temp2));
+ if (!val->representation().IsSmi()) result = AssignEnvironment(result);
+ return result;
+ }
+ }
+ } else if (from.IsDouble()) {
+ if (to.IsTagged()) {
+ info()->MarkAsDeferredCalling();
+ LOperand* value = UseRegister(val);
+ LOperand* temp1 = TempRegister();
+ LOperand* temp2 = TempRegister();
+ LUnallocated* result_temp = TempRegister();
+ LNumberTagD* result = new (zone()) LNumberTagD(value, temp1, temp2);
+ return AssignPointerMap(Define(result, result_temp));
+ } else if (to.IsSmi()) {
+ LOperand* value = UseRegister(val);
+ return AssignEnvironment(
+ DefineAsRegister(new (zone()) LDoubleToSmi(value)));
+ } else {
+ DCHECK(to.IsInteger32());
+ LOperand* value = UseRegister(val);
+ LInstruction* result = DefineAsRegister(new (zone()) LDoubleToI(value));
+ if (!instr->CanTruncateToInt32()) result = AssignEnvironment(result);
+ return result;
+ }
+ } else if (from.IsInteger32()) {
+ info()->MarkAsDeferredCalling();
+ if (to.IsTagged()) {
+ if (!instr->CheckFlag(HValue::kCanOverflow)) {
+ LOperand* value = UseRegisterAtStart(val);
+ return DefineAsRegister(new (zone()) LSmiTag(value));
+ } else if (val->CheckFlag(HInstruction::kUint32)) {
+ LOperand* value = UseRegisterAtStart(val);
+ LOperand* temp1 = TempRegister();
+ LOperand* temp2 = TempRegister();
+ LNumberTagU* result = new (zone()) LNumberTagU(value, temp1, temp2);
+ return AssignPointerMap(DefineAsRegister(result));
+ } else {
+ LOperand* value = UseRegisterAtStart(val);
+ LOperand* temp1 = TempRegister();
+ LOperand* temp2 = TempRegister();
+ LNumberTagI* result = new (zone()) LNumberTagI(value, temp1, temp2);
+ return AssignPointerMap(DefineAsRegister(result));
+ }
+ } else if (to.IsSmi()) {
+ LOperand* value = UseRegister(val);
+ LInstruction* result = DefineAsRegister(new (zone()) LSmiTag(value));
+ if (instr->CheckFlag(HValue::kCanOverflow)) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+ } else {
+ DCHECK(to.IsDouble());
+ if (val->CheckFlag(HInstruction::kUint32)) {
+ return DefineAsRegister(new (zone()) LUint32ToDouble(UseRegister(val)));
+ } else {
+ return DefineAsRegister(new (zone()) LInteger32ToDouble(Use(val)));
+ }
+ }
+ }
+ UNREACHABLE();
+ return NULL;
+}
+
+LInstruction* LChunkBuilder::DoCheckHeapObject(HCheckHeapObject* instr) {
+ LOperand* value = UseRegisterAtStart(instr->value());
+ LInstruction* result = new (zone()) LCheckNonSmi(value);
+ if (!instr->value()->type().IsHeapObject()) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoCheckSmi(HCheckSmi* instr) {
+ LOperand* value = UseRegisterAtStart(instr->value());
+ return AssignEnvironment(new (zone()) LCheckSmi(value));
+}
+
+LInstruction* LChunkBuilder::DoCheckArrayBufferNotNeutered(
+ HCheckArrayBufferNotNeutered* instr) {
+ LOperand* view = UseRegisterAtStart(instr->value());
+ LCheckArrayBufferNotNeutered* result =
+ new (zone()) LCheckArrayBufferNotNeutered(view);
+ return AssignEnvironment(result);
+}
+
+LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
+ LOperand* value = UseRegisterAtStart(instr->value());
+ LInstruction* result = new (zone()) LCheckInstanceType(value);
+ return AssignEnvironment(result);
+}
+
+LInstruction* LChunkBuilder::DoCheckValue(HCheckValue* instr) {
+ LOperand* value = UseRegisterAtStart(instr->value());
+ return AssignEnvironment(new (zone()) LCheckValue(value));
+}
+
+LInstruction* LChunkBuilder::DoCheckMaps(HCheckMaps* instr) {
+ if (instr->IsStabilityCheck()) return new (zone()) LCheckMaps;
+ LOperand* value = UseRegisterAtStart(instr->value());
+ LOperand* temp = TempRegister();
+ LInstruction* result =
+ AssignEnvironment(new (zone()) LCheckMaps(value, temp));
+ if (instr->HasMigrationTarget()) {
+ info()->MarkAsDeferredCalling();
+ result = AssignPointerMap(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) {
+ HValue* value = instr->value();
+ Representation input_rep = value->representation();
+ LOperand* reg = UseRegister(value);
+ if (input_rep.IsDouble()) {
+ return DefineAsRegister(new (zone()) LClampDToUint8(reg));
+ } else if (input_rep.IsInteger32()) {
+ return DefineAsRegister(new (zone()) LClampIToUint8(reg));
+ } else {
+ DCHECK(input_rep.IsSmiOrTagged());
+ LClampTToUint8* result =
+ new (zone()) LClampTToUint8(reg, TempDoubleRegister());
+ return AssignEnvironment(DefineAsRegister(result));
+ }
+}
+
+LInstruction* LChunkBuilder::DoDoubleBits(HDoubleBits* instr) {
+ HValue* value = instr->value();
+ DCHECK(value->representation().IsDouble());
+ return DefineAsRegister(new (zone()) LDoubleBits(UseRegister(value)));
+}
+
+LInstruction* LChunkBuilder::DoConstructDouble(HConstructDouble* instr) {
+ LOperand* lo = UseRegister(instr->lo());
+ LOperand* hi = UseRegister(instr->hi());
+ return DefineAsRegister(new (zone()) LConstructDouble(hi, lo));
+}
+
+LInstruction* LChunkBuilder::DoReturn(HReturn* instr) {
+ LOperand* context = info()->IsStub() ? UseFixed(instr->context(), cp) : NULL;
+ LOperand* parameter_count = UseRegisterOrConstant(instr->parameter_count());
+ return new (zone())
+ LReturn(UseFixed(instr->value(), r2), context, parameter_count);
+}
+
+LInstruction* LChunkBuilder::DoConstant(HConstant* instr) {
+ Representation r = instr->representation();
+ if (r.IsSmi()) {
+ return DefineAsRegister(new (zone()) LConstantS);
+ } else if (r.IsInteger32()) {
+ return DefineAsRegister(new (zone()) LConstantI);
+ } else if (r.IsDouble()) {
+ return DefineAsRegister(new (zone()) LConstantD);
+ } else if (r.IsExternal()) {
+ return DefineAsRegister(new (zone()) LConstantE);
+ } else if (r.IsTagged()) {
+ return DefineAsRegister(new (zone()) LConstantT);
+ } else {
+ UNREACHABLE();
+ return NULL;
+ }
+}
+
+LInstruction* LChunkBuilder::DoLoadGlobalGeneric(HLoadGlobalGeneric* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* global_object =
+ UseFixed(instr->global_object(), LoadDescriptor::ReceiverRegister());
+ LOperand* vector = NULL;
+ if (instr->HasVectorAndSlot()) {
+ vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister());
+ }
+ LLoadGlobalGeneric* result =
+ new (zone()) LLoadGlobalGeneric(context, global_object, vector);
+ return MarkAsCall(DefineFixed(result, r2), instr);
+}
+
+LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
+ LOperand* context = UseRegisterAtStart(instr->value());
+ LInstruction* result =
+ DefineAsRegister(new (zone()) LLoadContextSlot(context));
+ if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoStoreContextSlot(HStoreContextSlot* instr) {
+ LOperand* context;
+ LOperand* value;
+ if (instr->NeedsWriteBarrier()) {
+ context = UseTempRegister(instr->context());
+ value = UseTempRegister(instr->value());
+ } else {
+ context = UseRegister(instr->context());
+ value = UseRegister(instr->value());
+ }
+ LInstruction* result = new (zone()) LStoreContextSlot(context, value);
+ if (instr->RequiresHoleCheck() && instr->DeoptimizesOnHole()) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
+ LOperand* obj = UseRegisterAtStart(instr->object());
+ return DefineAsRegister(new (zone()) LLoadNamedField(obj));
+}
+
+LInstruction* LChunkBuilder::DoLoadNamedGeneric(HLoadNamedGeneric* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* object =
+ UseFixed(instr->object(), LoadDescriptor::ReceiverRegister());
+ LOperand* vector = NULL;
+ if (instr->HasVectorAndSlot()) {
+ vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister());
+ }
+
+ LInstruction* result =
+ DefineFixed(new (zone()) LLoadNamedGeneric(context, object, vector), r2);
+ return MarkAsCall(result, instr);
+}
+
+LInstruction* LChunkBuilder::DoLoadFunctionPrototype(
+ HLoadFunctionPrototype* instr) {
+ return AssignEnvironment(DefineAsRegister(
+ new (zone()) LLoadFunctionPrototype(UseRegister(instr->function()))));
+}
+
+LInstruction* LChunkBuilder::DoLoadRoot(HLoadRoot* instr) {
+ return DefineAsRegister(new (zone()) LLoadRoot);
+}
+
+LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
+ DCHECK(instr->key()->representation().IsSmiOrInteger32());
+ ElementsKind elements_kind = instr->elements_kind();
+ LOperand* key = UseRegisterOrConstantAtStart(instr->key());
+ LInstruction* result = NULL;
+
+ if (!instr->is_fixed_typed_array()) {
+ LOperand* obj = NULL;
+ if (instr->representation().IsDouble()) {
+ obj = UseRegister(instr->elements());
+ } else {
+ obj = UseRegisterAtStart(instr->elements());
+ }
+ result = DefineAsRegister(new (zone()) LLoadKeyed(obj, key, nullptr));
+ } else {
+ DCHECK((instr->representation().IsInteger32() &&
+ !IsDoubleOrFloatElementsKind(elements_kind)) ||
+ (instr->representation().IsDouble() &&
+ IsDoubleOrFloatElementsKind(elements_kind)));
+ LOperand* backing_store = UseRegister(instr->elements());
+ LOperand* backing_store_owner = UseAny(instr->backing_store_owner());
+ result = DefineAsRegister(
+ new (zone()) LLoadKeyed(backing_store, key, backing_store_owner));
+ }
+
+ bool needs_environment;
+ if (instr->is_fixed_typed_array()) {
+ // see LCodeGen::DoLoadKeyedExternalArray
+ needs_environment = elements_kind == UINT32_ELEMENTS &&
+ !instr->CheckFlag(HInstruction::kUint32);
+ } else {
+ // see LCodeGen::DoLoadKeyedFixedDoubleArray and
+ // LCodeGen::DoLoadKeyedFixedArray
+ needs_environment =
+ instr->RequiresHoleCheck() ||
+ (instr->hole_mode() == CONVERT_HOLE_TO_UNDEFINED && info()->IsStub());
+ }
+
+ if (needs_environment) {
+ result = AssignEnvironment(result);
+ }
+ return result;
+}
+
+LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* object =
+ UseFixed(instr->object(), LoadDescriptor::ReceiverRegister());
+ LOperand* key = UseFixed(instr->key(), LoadDescriptor::NameRegister());
+ LOperand* vector = NULL;
+ if (instr->HasVectorAndSlot()) {
+ vector = FixedTemp(LoadWithVectorDescriptor::VectorRegister());
+ }
+
+ LInstruction* result = DefineFixed(
+ new (zone()) LLoadKeyedGeneric(context, object, key, vector), r2);
+ return MarkAsCall(result, instr);
+}
+
+LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
+ if (!instr->is_fixed_typed_array()) {
+ DCHECK(instr->elements()->representation().IsTagged());
+ bool needs_write_barrier = instr->NeedsWriteBarrier();
+ LOperand* object = NULL;
+ LOperand* key = NULL;
+ LOperand* val = NULL;
+
+ if (instr->value()->representation().IsDouble()) {
+ object = UseRegisterAtStart(instr->elements());
+ val = UseRegister(instr->value());
+ key = UseRegisterOrConstantAtStart(instr->key());
+ } else {
+ if (needs_write_barrier) {
+ object = UseTempRegister(instr->elements());
+ val = UseTempRegister(instr->value());
+ key = UseTempRegister(instr->key());
+ } else {
+ object = UseRegisterAtStart(instr->elements());
+ val = UseRegisterAtStart(instr->value());
+ key = UseRegisterOrConstantAtStart(instr->key());
+ }
+ }
+
+ return new (zone()) LStoreKeyed(object, key, val, nullptr);
+ }
+
+ DCHECK((instr->value()->representation().IsInteger32() &&
+ !IsDoubleOrFloatElementsKind(instr->elements_kind())) ||
+ (instr->value()->representation().IsDouble() &&
+ IsDoubleOrFloatElementsKind(instr->elements_kind())));
+ DCHECK(instr->elements()->representation().IsExternal());
+ LOperand* val = UseRegister(instr->value());
+ LOperand* key = UseRegisterOrConstantAtStart(instr->key());
+ LOperand* backing_store = UseRegister(instr->elements());
+ LOperand* backing_store_owner = UseAny(instr->backing_store_owner());
+ return new (zone()) LStoreKeyed(backing_store, key, val, backing_store_owner);
+}
+
+LInstruction* LChunkBuilder::DoStoreKeyedGeneric(HStoreKeyedGeneric* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* obj =
+ UseFixed(instr->object(), StoreDescriptor::ReceiverRegister());
+ LOperand* key = UseFixed(instr->key(), StoreDescriptor::NameRegister());
+ LOperand* val = UseFixed(instr->value(), StoreDescriptor::ValueRegister());
+
+ DCHECK(instr->object()->representation().IsTagged());
+ DCHECK(instr->key()->representation().IsTagged());
+ DCHECK(instr->value()->representation().IsTagged());
+
+ LOperand* slot = NULL;
+ LOperand* vector = NULL;
+ if (instr->HasVectorAndSlot()) {
+ slot = FixedTemp(VectorStoreICDescriptor::SlotRegister());
+ vector = FixedTemp(VectorStoreICDescriptor::VectorRegister());
+ }
+
+ LStoreKeyedGeneric* result =
+ new (zone()) LStoreKeyedGeneric(context, obj, key, val, slot, vector);
+ return MarkAsCall(result, instr);
+}
+
+LInstruction* LChunkBuilder::DoTransitionElementsKind(
+ HTransitionElementsKind* instr) {
+ if (IsSimpleMapChangeTransition(instr->from_kind(), instr->to_kind())) {
+ LOperand* object = UseRegister(instr->object());
+ LOperand* new_map_reg = TempRegister();
+ LTransitionElementsKind* result =
+ new (zone()) LTransitionElementsKind(object, NULL, new_map_reg);
+ return result;
+ } else {
+ LOperand* object = UseFixed(instr->object(), r2);
+ LOperand* context = UseFixed(instr->context(), cp);
+ LTransitionElementsKind* result =
+ new (zone()) LTransitionElementsKind(object, context, NULL);
+ return MarkAsCall(result, instr);
+ }
+}
+
+LInstruction* LChunkBuilder::DoTrapAllocationMemento(
+ HTrapAllocationMemento* instr) {
+ LOperand* object = UseRegister(instr->object());
+ LOperand* temp1 = TempRegister();
+ LOperand* temp2 = TempRegister();
+ LTrapAllocationMemento* result =
+ new (zone()) LTrapAllocationMemento(object, temp1, temp2);
+ return AssignEnvironment(result);
+}
+
+LInstruction* LChunkBuilder::DoMaybeGrowElements(HMaybeGrowElements* instr) {
+ info()->MarkAsDeferredCalling();
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* object = Use(instr->object());
+ LOperand* elements = Use(instr->elements());
+ LOperand* key = UseRegisterOrConstant(instr->key());
+ LOperand* current_capacity = UseRegisterOrConstant(instr->current_capacity());
+
+ LMaybeGrowElements* result = new (zone())
+ LMaybeGrowElements(context, object, elements, key, current_capacity);
+ DefineFixed(result, r2);
+ return AssignPointerMap(AssignEnvironment(result));
+}
+
+LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
+ bool is_in_object = instr->access().IsInobject();
+ bool needs_write_barrier = instr->NeedsWriteBarrier();
+ bool needs_write_barrier_for_map =
+ instr->has_transition() && instr->NeedsWriteBarrierForMap();
+
+ LOperand* obj;
+ if (needs_write_barrier) {
+ obj = is_in_object ? UseRegister(instr->object())
+ : UseTempRegister(instr->object());
+ } else {
+ obj = needs_write_barrier_for_map ? UseRegister(instr->object())
+ : UseRegisterAtStart(instr->object());
+ }
+
+ LOperand* val;
+ if (needs_write_barrier) {
+ val = UseTempRegister(instr->value());
+ } else if (instr->field_representation().IsDouble()) {
+ val = UseRegisterAtStart(instr->value());
+ } else {
+ val = UseRegister(instr->value());
+ }
+
+ // We need a temporary register for write barrier of the map field.
+ LOperand* temp = needs_write_barrier_for_map ? TempRegister() : NULL;
+
+ return new (zone()) LStoreNamedField(obj, val, temp);
+}
+
+LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* obj =
+ UseFixed(instr->object(), StoreDescriptor::ReceiverRegister());
+ LOperand* val = UseFixed(instr->value(), StoreDescriptor::ValueRegister());
+ LOperand* slot = NULL;
+ LOperand* vector = NULL;
+ if (instr->HasVectorAndSlot()) {
+ slot = FixedTemp(VectorStoreICDescriptor::SlotRegister());
+ vector = FixedTemp(VectorStoreICDescriptor::VectorRegister());
+ }
+
+ LStoreNamedGeneric* result =
+ new (zone()) LStoreNamedGeneric(context, obj, val, slot, vector);
+ return MarkAsCall(result, instr);
+}
+
+LInstruction* LChunkBuilder::DoStringAdd(HStringAdd* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* left = UseFixed(instr->left(), r3);
+ LOperand* right = UseFixed(instr->right(), r2);
+ return MarkAsCall(
+ DefineFixed(new (zone()) LStringAdd(context, left, right), r2), instr);
+}
+
+LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
+ LOperand* string = UseTempRegister(instr->string());
+ LOperand* index = UseTempRegister(instr->index());
+ LOperand* context = UseAny(instr->context());
+ LStringCharCodeAt* result =
+ new (zone()) LStringCharCodeAt(context, string, index);
+ return AssignPointerMap(DefineAsRegister(result));
+}
+
+LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) {
+ LOperand* char_code = UseRegister(instr->value());
+ LOperand* context = UseAny(instr->context());
+ LStringCharFromCode* result =
+ new (zone()) LStringCharFromCode(context, char_code);
+ return AssignPointerMap(DefineAsRegister(result));
+}
+
+LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) {
+ info()->MarkAsDeferredCalling();
+ LOperand* context = UseAny(instr->context());
+ LOperand* size = UseRegisterOrConstant(instr->size());
+ LOperand* temp1 = TempRegister();
+ LOperand* temp2 = TempRegister();
+ LAllocate* result = new (zone()) LAllocate(context, size, temp1, temp2);
+ return AssignPointerMap(DefineAsRegister(result));
+}
+
+LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
+ DCHECK(argument_count_ == 0);
+ allocator_->MarkAsOsrEntry();
+ current_block_->last_environment()->set_ast_id(instr->ast_id());
+ return AssignEnvironment(new (zone()) LOsrEntry);
+}
+
+LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
+ LParameter* result = new (zone()) LParameter;
+ if (instr->kind() == HParameter::STACK_PARAMETER) {
+ int spill_index = chunk()->GetParameterStackSlot(instr->index());
+ return DefineAsSpilled(result, spill_index);
+ } else {
+ DCHECK(info()->IsStub());
+ CallInterfaceDescriptor descriptor = graph()->descriptor();
+ int index = static_cast<int>(instr->index());
+ Register reg = descriptor.GetRegisterParameter(index);
+ return DefineFixed(result, reg);
+ }
+}
+
+LInstruction* LChunkBuilder::DoUnknownOSRValue(HUnknownOSRValue* instr) {
+ // Use an index that corresponds to the location in the unoptimized frame,
+ // which the optimized frame will subsume.
+ int env_index = instr->index();
+ int spill_index = 0;
+ if (instr->environment()->is_parameter_index(env_index)) {
+ spill_index = chunk()->GetParameterStackSlot(env_index);
+ } else {
+ spill_index = env_index - instr->environment()->first_local_index();
+ if (spill_index > LUnallocated::kMaxFixedSlotIndex) {
+ Retry(kTooManySpillSlotsNeededForOSR);
+ spill_index = 0;
+ }
+ spill_index += StandardFrameConstants::kFixedSlotCount;
+ }
+ return DefineAsSpilled(new (zone()) LUnknownOSRValue, spill_index);
+}
+
+LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
+ // There are no real uses of the arguments object.
+ // arguments.length and element access are supported directly on
+ // stack arguments, and any real arguments object use causes a bailout.
+ // So this value is never used.
+ return NULL;
+}
+
+LInstruction* LChunkBuilder::DoCapturedObject(HCapturedObject* instr) {
+ instr->ReplayEnvironment(current_block_->last_environment());
+
+ // There are no real uses of a captured object.
+ return NULL;
+}
+
+LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
+ info()->MarkAsRequiresFrame();
+ LOperand* args = UseRegister(instr->arguments());
+ LOperand* length = UseRegisterOrConstantAtStart(instr->length());
+ LOperand* index = UseRegisterOrConstantAtStart(instr->index());
+ return DefineAsRegister(new (zone()) LAccessArgumentsAt(args, length, index));
+}
+
+LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* value = UseFixed(instr->value(), r5);
+ LTypeof* result = new (zone()) LTypeof(context, value);
+ return MarkAsCall(DefineFixed(result, r2), instr);
+}
+
+LInstruction* LChunkBuilder::DoTypeofIsAndBranch(HTypeofIsAndBranch* instr) {
+ return new (zone()) LTypeofIsAndBranch(UseRegister(instr->value()));
+}
+
+LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
+ instr->ReplayEnvironment(current_block_->last_environment());
+ return NULL;
+}
+
+LInstruction* LChunkBuilder::DoStackCheck(HStackCheck* instr) {
+ if (instr->is_function_entry()) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ return MarkAsCall(new (zone()) LStackCheck(context), instr);
+ } else {
+ DCHECK(instr->is_backwards_branch());
+ LOperand* context = UseAny(instr->context());
+ return AssignEnvironment(
+ AssignPointerMap(new (zone()) LStackCheck(context)));
+ }
+}
+
+LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
+ HEnvironment* outer = current_block_->last_environment();
+ outer->set_ast_id(instr->ReturnId());
+ HConstant* undefined = graph()->GetConstantUndefined();
+ HEnvironment* inner = outer->CopyForInlining(
+ instr->closure(), instr->arguments_count(), instr->function(), undefined,
+ instr->inlining_kind(), instr->syntactic_tail_call_mode());
+ // Only replay binding of arguments object if it wasn't removed from graph.
+ if (instr->arguments_var() != NULL && instr->arguments_object()->IsLinked()) {
+ inner->Bind(instr->arguments_var(), instr->arguments_object());
+ }
+ inner->BindContext(instr->closure_context());
+ inner->set_entry(instr);
+ current_block_->UpdateEnvironment(inner);
+ chunk_->AddInlinedFunction(instr->shared());
+ return NULL;
+}
+
+LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
+ LInstruction* pop = NULL;
+
+ HEnvironment* env = current_block_->last_environment();
+
+ if (env->entry()->arguments_pushed()) {
+ int argument_count = env->arguments_environment()->parameter_count();
+ pop = new (zone()) LDrop(argument_count);
+ DCHECK(instr->argument_delta() == -argument_count);
+ }
+
+ HEnvironment* outer =
+ current_block_->last_environment()->DiscardInlined(false);
+ current_block_->UpdateEnvironment(outer);
+
+ return pop;
+}
+
+LInstruction* LChunkBuilder::DoForInPrepareMap(HForInPrepareMap* instr) {
+ LOperand* context = UseFixed(instr->context(), cp);
+ LOperand* object = UseFixed(instr->enumerable(), r2);
+ LForInPrepareMap* result = new (zone()) LForInPrepareMap(context, object);
+ return MarkAsCall(DefineFixed(result, r2), instr, CAN_DEOPTIMIZE_EAGERLY);
+}
+
+LInstruction* LChunkBuilder::DoForInCacheArray(HForInCacheArray* instr) {
+ LOperand* map = UseRegister(instr->map());
+ return AssignEnvironment(
+ DefineAsRegister(new (zone()) LForInCacheArray(map)));
+}
+
+LInstruction* LChunkBuilder::DoCheckMapValue(HCheckMapValue* instr) {
+ LOperand* value = UseRegisterAtStart(instr->value());
+ LOperand* map = UseRegisterAtStart(instr->map());
+ return AssignEnvironment(new (zone()) LCheckMapValue(value, map));
+}
+
+LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
+ LOperand* object = UseRegister(instr->object());
+ LOperand* index = UseTempRegister(instr->index());
+ LLoadFieldByIndex* load = new (zone()) LLoadFieldByIndex(object, index);
+ LInstruction* result = DefineSameAsFirst(load);
+ return AssignPointerMap(result);
+}
+
+} // namespace internal
+} // namespace v8