| // Copyright 2015 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/compiler/bytecode-graph-builder.h" |
| |
| #include "src/compiler/bytecode-branch-analysis.h" |
| #include "src/compiler/linkage.h" |
| #include "src/compiler/operator-properties.h" |
| #include "src/interpreter/bytecodes.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace compiler { |
| |
| // The abstract execution environment simulates the content of the interpreter |
| // register file. The environment performs SSA-renaming of all tracked nodes at |
| // split and merge points in the control flow. |
| class BytecodeGraphBuilder::Environment : public ZoneObject { |
| public: |
| Environment(BytecodeGraphBuilder* builder, int register_count, |
| int parameter_count, Node* control_dependency, Node* context); |
| |
| int parameter_count() const { return parameter_count_; } |
| int register_count() const { return register_count_; } |
| |
| Node* LookupAccumulator() const; |
| Node* LookupRegister(interpreter::Register the_register) const; |
| |
| void BindAccumulator(Node* node, FrameStateBeforeAndAfter* states = nullptr); |
| void BindRegister(interpreter::Register the_register, Node* node, |
| FrameStateBeforeAndAfter* states = nullptr); |
| void BindRegistersToProjections(interpreter::Register first_reg, Node* node, |
| FrameStateBeforeAndAfter* states = nullptr); |
| void RecordAfterState(Node* node, FrameStateBeforeAndAfter* states); |
| |
| // Effect dependency tracked by this environment. |
| Node* GetEffectDependency() { return effect_dependency_; } |
| void UpdateEffectDependency(Node* dependency) { |
| effect_dependency_ = dependency; |
| } |
| |
| // Preserve a checkpoint of the environment for the IR graph. Any |
| // further mutation of the environment will not affect checkpoints. |
| Node* Checkpoint(BailoutId bytecode_offset, OutputFrameStateCombine combine); |
| |
| // Returns true if the state values are up to date with the current |
| // environment. |
| bool StateValuesAreUpToDate(int output_poke_offset, int output_poke_count); |
| |
| // Control dependency tracked by this environment. |
| Node* GetControlDependency() const { return control_dependency_; } |
| void UpdateControlDependency(Node* dependency) { |
| control_dependency_ = dependency; |
| } |
| |
| Node* Context() const { return context_; } |
| void SetContext(Node* new_context) { context_ = new_context; } |
| |
| Environment* CopyForConditional() const; |
| Environment* CopyForLoop(); |
| void Merge(Environment* other); |
| |
| private: |
| explicit Environment(const Environment* copy); |
| void PrepareForLoop(); |
| bool StateValuesAreUpToDate(Node** state_values, int offset, int count, |
| int output_poke_start, int output_poke_end); |
| bool StateValuesRequireUpdate(Node** state_values, int offset, int count); |
| void UpdateStateValues(Node** state_values, int offset, int count); |
| |
| int RegisterToValuesIndex(interpreter::Register the_register) const; |
| |
| Zone* zone() const { return builder_->local_zone(); } |
| Graph* graph() const { return builder_->graph(); } |
| CommonOperatorBuilder* common() const { return builder_->common(); } |
| BytecodeGraphBuilder* builder() const { return builder_; } |
| const NodeVector* values() const { return &values_; } |
| NodeVector* values() { return &values_; } |
| int register_base() const { return register_base_; } |
| int accumulator_base() const { return accumulator_base_; } |
| |
| BytecodeGraphBuilder* builder_; |
| int register_count_; |
| int parameter_count_; |
| Node* context_; |
| Node* control_dependency_; |
| Node* effect_dependency_; |
| NodeVector values_; |
| Node* parameters_state_values_; |
| Node* registers_state_values_; |
| Node* accumulator_state_values_; |
| int register_base_; |
| int accumulator_base_; |
| }; |
| |
| // Helper for generating frame states for before and after a bytecode. |
| class BytecodeGraphBuilder::FrameStateBeforeAndAfter { |
| public: |
| explicit FrameStateBeforeAndAfter(BytecodeGraphBuilder* builder) |
| : builder_(builder), |
| id_after_(BailoutId::None()), |
| added_to_node_(false), |
| frame_states_unused_(false), |
| output_poke_offset_(0), |
| output_poke_count_(0) { |
| BailoutId id_before(builder->bytecode_iterator().current_offset()); |
| frame_state_before_ = builder_->environment()->Checkpoint( |
| id_before, OutputFrameStateCombine::Ignore()); |
| id_after_ = BailoutId(id_before.ToInt() + |
| builder->bytecode_iterator().current_bytecode_size()); |
| } |
| |
| ~FrameStateBeforeAndAfter() { |
| DCHECK(added_to_node_); |
| DCHECK(frame_states_unused_ || |
| builder_->environment()->StateValuesAreUpToDate(output_poke_offset_, |
| output_poke_count_)); |
| } |
| |
| private: |
| friend class Environment; |
| |
| void AddToNode(Node* node, OutputFrameStateCombine combine) { |
| DCHECK(!added_to_node_); |
| int count = OperatorProperties::GetFrameStateInputCount(node->op()); |
| DCHECK_LE(count, 2); |
| if (count >= 1) { |
| // Add the frame state for after the operation. |
| DCHECK_EQ(IrOpcode::kDead, |
| NodeProperties::GetFrameStateInput(node, 0)->opcode()); |
| Node* frame_state_after = |
| builder_->environment()->Checkpoint(id_after_, combine); |
| NodeProperties::ReplaceFrameStateInput(node, 0, frame_state_after); |
| } |
| |
| if (count >= 2) { |
| // Add the frame state for before the operation. |
| DCHECK_EQ(IrOpcode::kDead, |
| NodeProperties::GetFrameStateInput(node, 1)->opcode()); |
| NodeProperties::ReplaceFrameStateInput(node, 1, frame_state_before_); |
| } |
| |
| if (!combine.IsOutputIgnored()) { |
| output_poke_offset_ = static_cast<int>(combine.GetOffsetToPokeAt()); |
| output_poke_count_ = node->op()->ValueOutputCount(); |
| } |
| frame_states_unused_ = count == 0; |
| added_to_node_ = true; |
| } |
| |
| BytecodeGraphBuilder* builder_; |
| Node* frame_state_before_; |
| BailoutId id_after_; |
| |
| bool added_to_node_; |
| bool frame_states_unused_; |
| int output_poke_offset_; |
| int output_poke_count_; |
| }; |
| |
| |
| // Issues: |
| // - Scopes - intimately tied to AST. Need to eval what is needed. |
| // - Need to resolve closure parameter treatment. |
| BytecodeGraphBuilder::Environment::Environment(BytecodeGraphBuilder* builder, |
| int register_count, |
| int parameter_count, |
| Node* control_dependency, |
| Node* context) |
| : builder_(builder), |
| register_count_(register_count), |
| parameter_count_(parameter_count), |
| context_(context), |
| control_dependency_(control_dependency), |
| effect_dependency_(control_dependency), |
| values_(builder->local_zone()), |
| parameters_state_values_(nullptr), |
| registers_state_values_(nullptr), |
| accumulator_state_values_(nullptr) { |
| // The layout of values_ is: |
| // |
| // [receiver] [parameters] [registers] [accumulator] |
| // |
| // parameter[0] is the receiver (this), parameters 1..N are the |
| // parameters supplied to the method (arg0..argN-1). The accumulator |
| // is stored separately. |
| |
| // Parameters including the receiver |
| for (int i = 0; i < parameter_count; i++) { |
| const char* debug_name = (i == 0) ? "%this" : nullptr; |
| const Operator* op = common()->Parameter(i, debug_name); |
| Node* parameter = builder->graph()->NewNode(op, graph()->start()); |
| values()->push_back(parameter); |
| } |
| |
| // Registers |
| register_base_ = static_cast<int>(values()->size()); |
| Node* undefined_constant = builder->jsgraph()->UndefinedConstant(); |
| values()->insert(values()->end(), register_count, undefined_constant); |
| |
| // Accumulator |
| accumulator_base_ = static_cast<int>(values()->size()); |
| values()->push_back(undefined_constant); |
| } |
| |
| |
| BytecodeGraphBuilder::Environment::Environment( |
| const BytecodeGraphBuilder::Environment* other) |
| : builder_(other->builder_), |
| register_count_(other->register_count_), |
| parameter_count_(other->parameter_count_), |
| context_(other->context_), |
| control_dependency_(other->control_dependency_), |
| effect_dependency_(other->effect_dependency_), |
| values_(other->zone()), |
| parameters_state_values_(nullptr), |
| registers_state_values_(nullptr), |
| accumulator_state_values_(nullptr), |
| register_base_(other->register_base_), |
| accumulator_base_(other->accumulator_base_) { |
| values_ = other->values_; |
| } |
| |
| |
| int BytecodeGraphBuilder::Environment::RegisterToValuesIndex( |
| interpreter::Register the_register) const { |
| if (the_register.is_parameter()) { |
| return the_register.ToParameterIndex(parameter_count()); |
| } else { |
| return the_register.index() + register_base(); |
| } |
| } |
| |
| |
| Node* BytecodeGraphBuilder::Environment::LookupAccumulator() const { |
| return values()->at(accumulator_base_); |
| } |
| |
| |
| Node* BytecodeGraphBuilder::Environment::LookupRegister( |
| interpreter::Register the_register) const { |
| if (the_register.is_current_context()) { |
| return Context(); |
| } else if (the_register.is_function_closure()) { |
| return builder()->GetFunctionClosure(); |
| } else if (the_register.is_new_target()) { |
| return builder()->GetNewTarget(); |
| } else { |
| int values_index = RegisterToValuesIndex(the_register); |
| return values()->at(values_index); |
| } |
| } |
| |
| |
| void BytecodeGraphBuilder::Environment::BindAccumulator( |
| Node* node, FrameStateBeforeAndAfter* states) { |
| if (states) { |
| states->AddToNode(node, OutputFrameStateCombine::PokeAt(0)); |
| } |
| values()->at(accumulator_base_) = node; |
| } |
| |
| |
| void BytecodeGraphBuilder::Environment::BindRegister( |
| interpreter::Register the_register, Node* node, |
| FrameStateBeforeAndAfter* states) { |
| int values_index = RegisterToValuesIndex(the_register); |
| if (states) { |
| states->AddToNode(node, OutputFrameStateCombine::PokeAt(accumulator_base_ - |
| values_index)); |
| } |
| values()->at(values_index) = node; |
| } |
| |
| |
| void BytecodeGraphBuilder::Environment::BindRegistersToProjections( |
| interpreter::Register first_reg, Node* node, |
| FrameStateBeforeAndAfter* states) { |
| int values_index = RegisterToValuesIndex(first_reg); |
| if (states) { |
| states->AddToNode(node, OutputFrameStateCombine::PokeAt(accumulator_base_ - |
| values_index)); |
| } |
| for (int i = 0; i < node->op()->ValueOutputCount(); i++) { |
| values()->at(values_index + i) = |
| builder()->NewNode(common()->Projection(i), node); |
| } |
| } |
| |
| |
| void BytecodeGraphBuilder::Environment::RecordAfterState( |
| Node* node, FrameStateBeforeAndAfter* states) { |
| states->AddToNode(node, OutputFrameStateCombine::Ignore()); |
| } |
| |
| |
| BytecodeGraphBuilder::Environment* |
| BytecodeGraphBuilder::Environment::CopyForLoop() { |
| PrepareForLoop(); |
| return new (zone()) Environment(this); |
| } |
| |
| |
| BytecodeGraphBuilder::Environment* |
| BytecodeGraphBuilder::Environment::CopyForConditional() const { |
| return new (zone()) Environment(this); |
| } |
| |
| |
| void BytecodeGraphBuilder::Environment::Merge( |
| BytecodeGraphBuilder::Environment* other) { |
| // Create a merge of the control dependencies of both environments and update |
| // the current environment's control dependency accordingly. |
| Node* control = builder()->MergeControl(GetControlDependency(), |
| other->GetControlDependency()); |
| UpdateControlDependency(control); |
| |
| // Create a merge of the effect dependencies of both environments and update |
| // the current environment's effect dependency accordingly. |
| Node* effect = builder()->MergeEffect(GetEffectDependency(), |
| other->GetEffectDependency(), control); |
| UpdateEffectDependency(effect); |
| |
| // Introduce Phi nodes for values that have differing input at merge points, |
| // potentially extending an existing Phi node if possible. |
| context_ = builder()->MergeValue(context_, other->context_, control); |
| for (size_t i = 0; i < values_.size(); i++) { |
| values_[i] = builder()->MergeValue(values_[i], other->values_[i], control); |
| } |
| } |
| |
| |
| void BytecodeGraphBuilder::Environment::PrepareForLoop() { |
| // Create a control node for the loop header. |
| Node* control = builder()->NewLoop(); |
| |
| // Create a Phi for external effects. |
| Node* effect = builder()->NewEffectPhi(1, GetEffectDependency(), control); |
| UpdateEffectDependency(effect); |
| |
| // Assume everything in the loop is updated. |
| context_ = builder()->NewPhi(1, context_, control); |
| int size = static_cast<int>(values()->size()); |
| for (int i = 0; i < size; i++) { |
| values()->at(i) = builder()->NewPhi(1, values()->at(i), control); |
| } |
| |
| // Connect to the loop end. |
| Node* terminate = builder()->graph()->NewNode( |
| builder()->common()->Terminate(), effect, control); |
| builder()->exit_controls_.push_back(terminate); |
| } |
| |
| |
| bool BytecodeGraphBuilder::Environment::StateValuesRequireUpdate( |
| Node** state_values, int offset, int count) { |
| if (!builder()->deoptimization_enabled_) { |
| return false; |
| } |
| if (*state_values == nullptr) { |
| return true; |
| } |
| DCHECK_EQ((*state_values)->InputCount(), count); |
| DCHECK_LE(static_cast<size_t>(offset + count), values()->size()); |
| Node** env_values = (count == 0) ? nullptr : &values()->at(offset); |
| for (int i = 0; i < count; i++) { |
| if ((*state_values)->InputAt(i) != env_values[i]) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| |
| void BytecodeGraphBuilder::Environment::UpdateStateValues(Node** state_values, |
| int offset, |
| int count) { |
| if (StateValuesRequireUpdate(state_values, offset, count)) { |
| const Operator* op = common()->StateValues(count); |
| (*state_values) = graph()->NewNode(op, count, &values()->at(offset)); |
| } |
| } |
| |
| |
| Node* BytecodeGraphBuilder::Environment::Checkpoint( |
| BailoutId bailout_id, OutputFrameStateCombine combine) { |
| if (!builder()->deoptimization_enabled_) { |
| return builder()->jsgraph()->EmptyFrameState(); |
| } |
| |
| // TODO(rmcilroy): Consider using StateValuesCache for some state values. |
| UpdateStateValues(¶meters_state_values_, 0, parameter_count()); |
| UpdateStateValues(®isters_state_values_, register_base(), |
| register_count()); |
| UpdateStateValues(&accumulator_state_values_, accumulator_base(), 1); |
| |
| const Operator* op = common()->FrameState( |
| bailout_id, combine, builder()->frame_state_function_info()); |
| Node* result = graph()->NewNode( |
| op, parameters_state_values_, registers_state_values_, |
| accumulator_state_values_, Context(), builder()->GetFunctionClosure(), |
| builder()->graph()->start()); |
| |
| return result; |
| } |
| |
| |
| bool BytecodeGraphBuilder::Environment::StateValuesAreUpToDate( |
| Node** state_values, int offset, int count, int output_poke_start, |
| int output_poke_end) { |
| DCHECK_LE(static_cast<size_t>(offset + count), values()->size()); |
| for (int i = 0; i < count; i++, offset++) { |
| if (offset < output_poke_start || offset >= output_poke_end) { |
| if ((*state_values)->InputAt(i) != values()->at(offset)) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| |
| bool BytecodeGraphBuilder::Environment::StateValuesAreUpToDate( |
| int output_poke_offset, int output_poke_count) { |
| if (!builder()->deoptimization_enabled_) return true; |
| // Poke offset is relative to the top of the stack (i.e., the accumulator). |
| int output_poke_start = accumulator_base() - output_poke_offset; |
| int output_poke_end = output_poke_start + output_poke_count; |
| return StateValuesAreUpToDate(¶meters_state_values_, 0, parameter_count(), |
| output_poke_start, output_poke_end) && |
| StateValuesAreUpToDate(®isters_state_values_, register_base(), |
| register_count(), output_poke_start, |
| output_poke_end) && |
| StateValuesAreUpToDate(&accumulator_state_values_, accumulator_base(), |
| 1, output_poke_start, output_poke_end); |
| } |
| |
| BytecodeGraphBuilder::BytecodeGraphBuilder(Zone* local_zone, |
| CompilationInfo* info, |
| JSGraph* jsgraph) |
| : local_zone_(local_zone), |
| jsgraph_(jsgraph), |
| bytecode_array_(handle(info->shared_info()->bytecode_array())), |
| exception_handler_table_( |
| handle(HandlerTable::cast(bytecode_array()->handler_table()))), |
| feedback_vector_(info->feedback_vector()), |
| frame_state_function_info_(common()->CreateFrameStateFunctionInfo( |
| FrameStateType::kInterpretedFunction, |
| bytecode_array()->parameter_count(), |
| bytecode_array()->register_count(), info->shared_info())), |
| deoptimization_enabled_(info->is_deoptimization_enabled()), |
| merge_environments_(local_zone), |
| exception_handlers_(local_zone), |
| current_exception_handler_(0), |
| input_buffer_size_(0), |
| input_buffer_(nullptr), |
| exit_controls_(local_zone) {} |
| |
| Node* BytecodeGraphBuilder::GetNewTarget() { |
| if (!new_target_.is_set()) { |
| int params = bytecode_array()->parameter_count(); |
| int index = Linkage::GetJSCallNewTargetParamIndex(params); |
| const Operator* op = common()->Parameter(index, "%new.target"); |
| Node* node = NewNode(op, graph()->start()); |
| new_target_.set(node); |
| } |
| return new_target_.get(); |
| } |
| |
| |
| Node* BytecodeGraphBuilder::GetFunctionContext() { |
| if (!function_context_.is_set()) { |
| int params = bytecode_array()->parameter_count(); |
| int index = Linkage::GetJSCallContextParamIndex(params); |
| const Operator* op = common()->Parameter(index, "%context"); |
| Node* node = NewNode(op, graph()->start()); |
| function_context_.set(node); |
| } |
| return function_context_.get(); |
| } |
| |
| |
| Node* BytecodeGraphBuilder::GetFunctionClosure() { |
| if (!function_closure_.is_set()) { |
| int index = Linkage::kJSCallClosureParamIndex; |
| const Operator* op = common()->Parameter(index, "%closure"); |
| Node* node = NewNode(op, graph()->start()); |
| function_closure_.set(node); |
| } |
| return function_closure_.get(); |
| } |
| |
| |
| Node* BytecodeGraphBuilder::BuildLoadNativeContextField(int index) { |
| const Operator* op = |
| javascript()->LoadContext(0, Context::NATIVE_CONTEXT_INDEX, true); |
| Node* native_context = NewNode(op, environment()->Context()); |
| return NewNode(javascript()->LoadContext(0, index, true), native_context); |
| } |
| |
| |
| VectorSlotPair BytecodeGraphBuilder::CreateVectorSlotPair(int slot_id) { |
| FeedbackVectorSlot slot; |
| if (slot_id >= TypeFeedbackVector::kReservedIndexCount) { |
| slot = feedback_vector()->ToSlot(slot_id); |
| } |
| return VectorSlotPair(feedback_vector(), slot); |
| } |
| |
| bool BytecodeGraphBuilder::CreateGraph() { |
| // Set up the basic structure of the graph. Outputs for {Start} are |
| // the formal parameters (including the receiver) plus context and |
| // closure. |
| |
| // Set up the basic structure of the graph. Outputs for {Start} are the formal |
| // parameters (including the receiver) plus new target, number of arguments, |
| // context and closure. |
| int actual_parameter_count = bytecode_array()->parameter_count() + 4; |
| graph()->SetStart(graph()->NewNode(common()->Start(actual_parameter_count))); |
| |
| Environment env(this, bytecode_array()->register_count(), |
| bytecode_array()->parameter_count(), graph()->start(), |
| GetFunctionContext()); |
| set_environment(&env); |
| |
| VisitBytecodes(); |
| |
| // Finish the basic structure of the graph. |
| DCHECK_NE(0u, exit_controls_.size()); |
| int const input_count = static_cast<int>(exit_controls_.size()); |
| Node** const inputs = &exit_controls_.front(); |
| Node* end = graph()->NewNode(common()->End(input_count), input_count, inputs); |
| graph()->SetEnd(end); |
| |
| return true; |
| } |
| |
| void BytecodeGraphBuilder::VisitBytecodes() { |
| BytecodeBranchAnalysis analysis(bytecode_array(), local_zone()); |
| analysis.Analyze(); |
| set_branch_analysis(&analysis); |
| interpreter::BytecodeArrayIterator iterator(bytecode_array()); |
| set_bytecode_iterator(&iterator); |
| while (!iterator.done()) { |
| int current_offset = iterator.current_offset(); |
| EnterAndExitExceptionHandlers(current_offset); |
| SwitchToMergeEnvironment(current_offset); |
| if (environment() != nullptr) { |
| BuildLoopHeaderEnvironment(current_offset); |
| |
| switch (iterator.current_bytecode()) { |
| #define BYTECODE_CASE(name, ...) \ |
| case interpreter::Bytecode::k##name: \ |
| Visit##name(); \ |
| break; |
| BYTECODE_LIST(BYTECODE_CASE) |
| #undef BYTECODE_CODE |
| } |
| } |
| iterator.Advance(); |
| } |
| set_branch_analysis(nullptr); |
| set_bytecode_iterator(nullptr); |
| DCHECK(exception_handlers_.empty()); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaZero() { |
| Node* node = jsgraph()->ZeroConstant(); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaSmi8() { |
| Node* node = jsgraph()->Constant(bytecode_iterator().GetImmediateOperand(0)); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaConstantWide() { |
| Node* node = |
| jsgraph()->Constant(bytecode_iterator().GetConstantForIndexOperand(0)); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaConstant() { |
| Node* node = |
| jsgraph()->Constant(bytecode_iterator().GetConstantForIndexOperand(0)); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaUndefined() { |
| Node* node = jsgraph()->UndefinedConstant(); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaNull() { |
| Node* node = jsgraph()->NullConstant(); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaTheHole() { |
| Node* node = jsgraph()->TheHoleConstant(); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaTrue() { |
| Node* node = jsgraph()->TrueConstant(); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaFalse() { |
| Node* node = jsgraph()->FalseConstant(); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdar() { |
| Node* value = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| environment()->BindAccumulator(value); |
| } |
| |
| void BytecodeGraphBuilder::VisitStar() { |
| Node* value = environment()->LookupAccumulator(); |
| environment()->BindRegister(bytecode_iterator().GetRegisterOperand(0), value); |
| } |
| |
| void BytecodeGraphBuilder::VisitMov() { |
| Node* value = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| environment()->BindRegister(bytecode_iterator().GetRegisterOperand(1), value); |
| } |
| |
| void BytecodeGraphBuilder::VisitMovWide() { VisitMov(); } |
| |
| void BytecodeGraphBuilder::BuildLoadGlobal( |
| TypeofMode typeof_mode) { |
| FrameStateBeforeAndAfter states(this); |
| Handle<Name> name = |
| Handle<Name>::cast(bytecode_iterator().GetConstantForIndexOperand(0)); |
| VectorSlotPair feedback = |
| CreateVectorSlotPair(bytecode_iterator().GetIndexOperand(1)); |
| |
| const Operator* op = javascript()->LoadGlobal(name, feedback, typeof_mode); |
| Node* node = NewNode(op, GetFunctionClosure()); |
| environment()->BindAccumulator(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaGlobal() { |
| BuildLoadGlobal(TypeofMode::NOT_INSIDE_TYPEOF); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaGlobalInsideTypeof() { |
| BuildLoadGlobal(TypeofMode::INSIDE_TYPEOF); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaGlobalWide() { |
| BuildLoadGlobal(TypeofMode::NOT_INSIDE_TYPEOF); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaGlobalInsideTypeofWide() { |
| BuildLoadGlobal(TypeofMode::INSIDE_TYPEOF); |
| } |
| |
| void BytecodeGraphBuilder::BuildStoreGlobal(LanguageMode language_mode) { |
| FrameStateBeforeAndAfter states(this); |
| Handle<Name> name = |
| Handle<Name>::cast(bytecode_iterator().GetConstantForIndexOperand(0)); |
| VectorSlotPair feedback = |
| CreateVectorSlotPair(bytecode_iterator().GetIndexOperand(1)); |
| Node* value = environment()->LookupAccumulator(); |
| |
| const Operator* op = javascript()->StoreGlobal(language_mode, name, feedback); |
| Node* node = NewNode(op, value, GetFunctionClosure()); |
| environment()->RecordAfterState(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitStaGlobalSloppy() { |
| BuildStoreGlobal(LanguageMode::SLOPPY); |
| } |
| |
| void BytecodeGraphBuilder::VisitStaGlobalStrict() { |
| BuildStoreGlobal(LanguageMode::STRICT); |
| } |
| |
| void BytecodeGraphBuilder::VisitStaGlobalSloppyWide() { |
| BuildStoreGlobal(LanguageMode::SLOPPY); |
| } |
| |
| void BytecodeGraphBuilder::VisitStaGlobalStrictWide() { |
| BuildStoreGlobal(LanguageMode::STRICT); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaContextSlot() { |
| // TODO(mythria): LoadContextSlots are unrolled by the required depth when |
| // generating bytecode. Hence the value of depth is always 0. Update this |
| // code, when the implementation changes. |
| // TODO(mythria): immutable flag is also set to false. This information is not |
| // available in bytecode array. update this code when the implementation |
| // changes. |
| const Operator* op = javascript()->LoadContext( |
| 0, bytecode_iterator().GetIndexOperand(1), false); |
| Node* context = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Node* node = NewNode(op, context); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaContextSlotWide() { VisitLdaContextSlot(); } |
| |
| void BytecodeGraphBuilder::VisitStaContextSlot() { |
| // TODO(mythria): LoadContextSlots are unrolled by the required depth when |
| // generating bytecode. Hence the value of depth is always 0. Update this |
| // code, when the implementation changes. |
| const Operator* op = |
| javascript()->StoreContext(0, bytecode_iterator().GetIndexOperand(1)); |
| Node* context = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Node* value = environment()->LookupAccumulator(); |
| NewNode(op, context, value); |
| } |
| |
| void BytecodeGraphBuilder::VisitStaContextSlotWide() { VisitStaContextSlot(); } |
| |
| void BytecodeGraphBuilder::BuildLdaLookupSlot(TypeofMode typeof_mode) { |
| FrameStateBeforeAndAfter states(this); |
| Node* name = |
| jsgraph()->Constant(bytecode_iterator().GetConstantForIndexOperand(0)); |
| const Operator* op = |
| javascript()->CallRuntime(typeof_mode == TypeofMode::NOT_INSIDE_TYPEOF |
| ? Runtime::kLoadLookupSlot |
| : Runtime::kLoadLookupSlotInsideTypeof); |
| Node* value = NewNode(op, name); |
| environment()->BindAccumulator(value, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaLookupSlot() { |
| BuildLdaLookupSlot(TypeofMode::NOT_INSIDE_TYPEOF); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaLookupSlotInsideTypeof() { |
| BuildLdaLookupSlot(TypeofMode::INSIDE_TYPEOF); |
| } |
| |
| void BytecodeGraphBuilder::BuildStaLookupSlot(LanguageMode language_mode) { |
| FrameStateBeforeAndAfter states(this); |
| Node* value = environment()->LookupAccumulator(); |
| Node* name = |
| jsgraph()->Constant(bytecode_iterator().GetConstantForIndexOperand(0)); |
| const Operator* op = javascript()->CallRuntime( |
| is_strict(language_mode) ? Runtime::kStoreLookupSlot_Strict |
| : Runtime::kStoreLookupSlot_Sloppy); |
| Node* store = NewNode(op, name, value); |
| environment()->BindAccumulator(store, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitLdaLookupSlotWide() { VisitLdaLookupSlot(); } |
| |
| void BytecodeGraphBuilder::VisitLdaLookupSlotInsideTypeofWide() { |
| VisitLdaLookupSlotInsideTypeof(); |
| } |
| |
| void BytecodeGraphBuilder::VisitStaLookupSlotSloppy() { |
| BuildStaLookupSlot(LanguageMode::SLOPPY); |
| } |
| |
| void BytecodeGraphBuilder::VisitStaLookupSlotStrict() { |
| BuildStaLookupSlot(LanguageMode::STRICT); |
| } |
| |
| void BytecodeGraphBuilder::VisitStaLookupSlotSloppyWide() { |
| VisitStaLookupSlotSloppy(); |
| } |
| |
| void BytecodeGraphBuilder::VisitStaLookupSlotStrictWide() { |
| VisitStaLookupSlotStrict(); |
| } |
| |
| void BytecodeGraphBuilder::BuildNamedLoad() { |
| FrameStateBeforeAndAfter states(this); |
| Node* object = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Handle<Name> name = |
| Handle<Name>::cast(bytecode_iterator().GetConstantForIndexOperand(1)); |
| VectorSlotPair feedback = |
| CreateVectorSlotPair(bytecode_iterator().GetIndexOperand(2)); |
| |
| const Operator* op = javascript()->LoadNamed(name, feedback); |
| Node* node = NewNode(op, object, GetFunctionClosure()); |
| environment()->BindAccumulator(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitLoadIC() { BuildNamedLoad(); } |
| |
| void BytecodeGraphBuilder::VisitLoadICWide() { BuildNamedLoad(); } |
| |
| void BytecodeGraphBuilder::BuildKeyedLoad() { |
| FrameStateBeforeAndAfter states(this); |
| Node* key = environment()->LookupAccumulator(); |
| Node* object = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| VectorSlotPair feedback = |
| CreateVectorSlotPair(bytecode_iterator().GetIndexOperand(1)); |
| |
| const Operator* op = javascript()->LoadProperty(feedback); |
| Node* node = NewNode(op, object, key, GetFunctionClosure()); |
| environment()->BindAccumulator(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitKeyedLoadIC() { BuildKeyedLoad(); } |
| |
| void BytecodeGraphBuilder::VisitKeyedLoadICWide() { BuildKeyedLoad(); } |
| |
| void BytecodeGraphBuilder::BuildNamedStore(LanguageMode language_mode) { |
| FrameStateBeforeAndAfter states(this); |
| Node* value = environment()->LookupAccumulator(); |
| Node* object = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Handle<Name> name = |
| Handle<Name>::cast(bytecode_iterator().GetConstantForIndexOperand(1)); |
| VectorSlotPair feedback = |
| CreateVectorSlotPair(bytecode_iterator().GetIndexOperand(2)); |
| |
| const Operator* op = javascript()->StoreNamed(language_mode, name, feedback); |
| Node* node = NewNode(op, object, value, GetFunctionClosure()); |
| environment()->RecordAfterState(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitStoreICSloppy() { |
| BuildNamedStore(LanguageMode::SLOPPY); |
| } |
| |
| void BytecodeGraphBuilder::VisitStoreICStrict() { |
| BuildNamedStore(LanguageMode::STRICT); |
| } |
| |
| void BytecodeGraphBuilder::VisitStoreICSloppyWide() { |
| BuildNamedStore(LanguageMode::SLOPPY); |
| } |
| |
| void BytecodeGraphBuilder::VisitStoreICStrictWide() { |
| BuildNamedStore(LanguageMode::STRICT); |
| } |
| |
| void BytecodeGraphBuilder::BuildKeyedStore(LanguageMode language_mode) { |
| FrameStateBeforeAndAfter states(this); |
| Node* value = environment()->LookupAccumulator(); |
| Node* object = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Node* key = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(1)); |
| VectorSlotPair feedback = |
| CreateVectorSlotPair(bytecode_iterator().GetIndexOperand(2)); |
| |
| const Operator* op = javascript()->StoreProperty(language_mode, feedback); |
| Node* node = NewNode(op, object, key, value, GetFunctionClosure()); |
| environment()->RecordAfterState(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitKeyedStoreICSloppy() { |
| BuildKeyedStore(LanguageMode::SLOPPY); |
| } |
| |
| void BytecodeGraphBuilder::VisitKeyedStoreICStrict() { |
| BuildKeyedStore(LanguageMode::STRICT); |
| } |
| |
| void BytecodeGraphBuilder::VisitKeyedStoreICSloppyWide() { |
| BuildKeyedStore(LanguageMode::SLOPPY); |
| } |
| |
| void BytecodeGraphBuilder::VisitKeyedStoreICStrictWide() { |
| BuildKeyedStore(LanguageMode::STRICT); |
| } |
| |
| void BytecodeGraphBuilder::VisitPushContext() { |
| Node* new_context = environment()->LookupAccumulator(); |
| environment()->BindRegister(bytecode_iterator().GetRegisterOperand(0), |
| environment()->Context()); |
| environment()->SetContext(new_context); |
| } |
| |
| void BytecodeGraphBuilder::VisitPopContext() { |
| Node* context = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| environment()->SetContext(context); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateClosure() { |
| Handle<SharedFunctionInfo> shared_info = Handle<SharedFunctionInfo>::cast( |
| bytecode_iterator().GetConstantForIndexOperand(0)); |
| PretenureFlag tenured = |
| bytecode_iterator().GetImmediateOperand(1) ? TENURED : NOT_TENURED; |
| const Operator* op = javascript()->CreateClosure(shared_info, tenured); |
| Node* closure = NewNode(op); |
| environment()->BindAccumulator(closure); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateClosureWide() { VisitCreateClosure(); } |
| |
| void BytecodeGraphBuilder::BuildCreateArguments(CreateArgumentsType type) { |
| FrameStateBeforeAndAfter states(this); |
| const Operator* op = javascript()->CreateArguments(type); |
| Node* object = NewNode(op, GetFunctionClosure()); |
| environment()->BindAccumulator(object, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateMappedArguments() { |
| BuildCreateArguments(CreateArgumentsType::kMappedArguments); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateUnmappedArguments() { |
| BuildCreateArguments(CreateArgumentsType::kUnmappedArguments); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateRestParameter() { |
| BuildCreateArguments(CreateArgumentsType::kRestParameter); |
| } |
| |
| void BytecodeGraphBuilder::BuildCreateLiteral(const Operator* op) { |
| FrameStateBeforeAndAfter states(this); |
| Node* literal = NewNode(op, GetFunctionClosure()); |
| environment()->BindAccumulator(literal, &states); |
| } |
| |
| void BytecodeGraphBuilder::BuildCreateRegExpLiteral() { |
| Handle<String> constant_pattern = |
| Handle<String>::cast(bytecode_iterator().GetConstantForIndexOperand(0)); |
| int literal_index = bytecode_iterator().GetIndexOperand(1); |
| int literal_flags = bytecode_iterator().GetImmediateOperand(2); |
| const Operator* op = javascript()->CreateLiteralRegExp( |
| constant_pattern, literal_flags, literal_index); |
| BuildCreateLiteral(op); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateRegExpLiteral() { |
| BuildCreateRegExpLiteral(); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateRegExpLiteralWide() { |
| BuildCreateRegExpLiteral(); |
| } |
| |
| void BytecodeGraphBuilder::BuildCreateArrayLiteral() { |
| Handle<FixedArray> constant_elements = Handle<FixedArray>::cast( |
| bytecode_iterator().GetConstantForIndexOperand(0)); |
| int literal_index = bytecode_iterator().GetIndexOperand(1); |
| int literal_flags = bytecode_iterator().GetImmediateOperand(2); |
| const Operator* op = javascript()->CreateLiteralArray( |
| constant_elements, literal_flags, literal_index); |
| BuildCreateLiteral(op); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateArrayLiteral() { |
| BuildCreateArrayLiteral(); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateArrayLiteralWide() { |
| BuildCreateArrayLiteral(); |
| } |
| |
| void BytecodeGraphBuilder::BuildCreateObjectLiteral() { |
| Handle<FixedArray> constant_properties = Handle<FixedArray>::cast( |
| bytecode_iterator().GetConstantForIndexOperand(0)); |
| int literal_index = bytecode_iterator().GetIndexOperand(1); |
| int literal_flags = bytecode_iterator().GetImmediateOperand(2); |
| const Operator* op = javascript()->CreateLiteralObject( |
| constant_properties, literal_flags, literal_index); |
| BuildCreateLiteral(op); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateObjectLiteral() { |
| BuildCreateObjectLiteral(); |
| } |
| |
| void BytecodeGraphBuilder::VisitCreateObjectLiteralWide() { |
| BuildCreateObjectLiteral(); |
| } |
| |
| |
| Node* BytecodeGraphBuilder::ProcessCallArguments(const Operator* call_op, |
| Node* callee, |
| interpreter::Register receiver, |
| size_t arity) { |
| Node** all = local_zone()->NewArray<Node*>(static_cast<int>(arity)); |
| all[0] = callee; |
| all[1] = environment()->LookupRegister(receiver); |
| int receiver_index = receiver.index(); |
| for (int i = 2; i < static_cast<int>(arity); ++i) { |
| all[i] = environment()->LookupRegister( |
| interpreter::Register(receiver_index + i - 1)); |
| } |
| Node* value = MakeNode(call_op, static_cast<int>(arity), all, false); |
| return value; |
| } |
| |
| void BytecodeGraphBuilder::BuildCall(TailCallMode tail_call_mode) { |
| FrameStateBeforeAndAfter states(this); |
| // TODO(rmcilroy): Set receiver_hint correctly based on whether the receiver |
| // register has been loaded with null / undefined explicitly or we are sure it |
| // is not null / undefined. |
| ConvertReceiverMode receiver_hint = ConvertReceiverMode::kAny; |
| Node* callee = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| interpreter::Register receiver = bytecode_iterator().GetRegisterOperand(1); |
| size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2); |
| VectorSlotPair feedback = |
| CreateVectorSlotPair(bytecode_iterator().GetIndexOperand(3)); |
| |
| const Operator* call = javascript()->CallFunction( |
| arg_count + 1, feedback, receiver_hint, tail_call_mode); |
| Node* value = ProcessCallArguments(call, callee, receiver, arg_count + 1); |
| environment()->BindAccumulator(value, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitCall() { BuildCall(TailCallMode::kDisallow); } |
| |
| void BytecodeGraphBuilder::VisitCallWide() { |
| BuildCall(TailCallMode::kDisallow); |
| } |
| |
| void BytecodeGraphBuilder::VisitTailCall() { BuildCall(TailCallMode::kAllow); } |
| |
| void BytecodeGraphBuilder::VisitTailCallWide() { |
| BuildCall(TailCallMode::kAllow); |
| } |
| |
| void BytecodeGraphBuilder::BuildCallJSRuntime() { |
| FrameStateBeforeAndAfter states(this); |
| Node* callee = |
| BuildLoadNativeContextField(bytecode_iterator().GetIndexOperand(0)); |
| interpreter::Register receiver = bytecode_iterator().GetRegisterOperand(1); |
| size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2); |
| |
| // Create node to perform the JS runtime call. |
| const Operator* call = javascript()->CallFunction(arg_count + 1); |
| Node* value = ProcessCallArguments(call, callee, receiver, arg_count + 1); |
| environment()->BindAccumulator(value, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitCallJSRuntime() { BuildCallJSRuntime(); } |
| |
| void BytecodeGraphBuilder::VisitCallJSRuntimeWide() { BuildCallJSRuntime(); } |
| |
| Node* BytecodeGraphBuilder::ProcessCallRuntimeArguments( |
| const Operator* call_runtime_op, interpreter::Register first_arg, |
| size_t arity) { |
| Node** all = local_zone()->NewArray<Node*>(arity); |
| int first_arg_index = first_arg.index(); |
| for (int i = 0; i < static_cast<int>(arity); ++i) { |
| all[i] = environment()->LookupRegister( |
| interpreter::Register(first_arg_index + i)); |
| } |
| Node* value = MakeNode(call_runtime_op, static_cast<int>(arity), all, false); |
| return value; |
| } |
| |
| void BytecodeGraphBuilder::BuildCallRuntime() { |
| FrameStateBeforeAndAfter states(this); |
| Runtime::FunctionId functionId = |
| static_cast<Runtime::FunctionId>(bytecode_iterator().GetIndexOperand(0)); |
| interpreter::Register first_arg = bytecode_iterator().GetRegisterOperand(1); |
| size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2); |
| |
| // Create node to perform the runtime call. |
| const Operator* call = javascript()->CallRuntime(functionId, arg_count); |
| Node* value = ProcessCallRuntimeArguments(call, first_arg, arg_count); |
| environment()->BindAccumulator(value, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitCallRuntime() { BuildCallRuntime(); } |
| |
| void BytecodeGraphBuilder::VisitCallRuntimeWide() { BuildCallRuntime(); } |
| |
| void BytecodeGraphBuilder::BuildCallRuntimeForPair() { |
| FrameStateBeforeAndAfter states(this); |
| Runtime::FunctionId functionId = |
| static_cast<Runtime::FunctionId>(bytecode_iterator().GetIndexOperand(0)); |
| interpreter::Register first_arg = bytecode_iterator().GetRegisterOperand(1); |
| size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2); |
| interpreter::Register first_return = |
| bytecode_iterator().GetRegisterOperand(3); |
| |
| // Create node to perform the runtime call. |
| const Operator* call = javascript()->CallRuntime(functionId, arg_count); |
| Node* return_pair = ProcessCallRuntimeArguments(call, first_arg, arg_count); |
| environment()->BindRegistersToProjections(first_return, return_pair, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitCallRuntimeForPair() { |
| BuildCallRuntimeForPair(); |
| } |
| |
| void BytecodeGraphBuilder::VisitCallRuntimeForPairWide() { |
| BuildCallRuntimeForPair(); |
| } |
| |
| Node* BytecodeGraphBuilder::ProcessCallNewArguments( |
| const Operator* call_new_op, Node* callee, Node* new_target, |
| interpreter::Register first_arg, size_t arity) { |
| Node** all = local_zone()->NewArray<Node*>(arity); |
| all[0] = new_target; |
| int first_arg_index = first_arg.index(); |
| for (int i = 1; i < static_cast<int>(arity) - 1; ++i) { |
| all[i] = environment()->LookupRegister( |
| interpreter::Register(first_arg_index + i - 1)); |
| } |
| all[arity - 1] = callee; |
| Node* value = MakeNode(call_new_op, static_cast<int>(arity), all, false); |
| return value; |
| } |
| |
| void BytecodeGraphBuilder::BuildCallConstruct() { |
| FrameStateBeforeAndAfter states(this); |
| interpreter::Register callee_reg = bytecode_iterator().GetRegisterOperand(0); |
| interpreter::Register first_arg = bytecode_iterator().GetRegisterOperand(1); |
| size_t arg_count = bytecode_iterator().GetRegisterCountOperand(2); |
| |
| Node* new_target = environment()->LookupAccumulator(); |
| Node* callee = environment()->LookupRegister(callee_reg); |
| // TODO(turbofan): Pass the feedback here. |
| const Operator* call = javascript()->CallConstruct( |
| static_cast<int>(arg_count) + 2, VectorSlotPair()); |
| Node* value = ProcessCallNewArguments(call, callee, new_target, first_arg, |
| arg_count + 2); |
| environment()->BindAccumulator(value, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitNew() { BuildCallConstruct(); } |
| |
| void BytecodeGraphBuilder::VisitNewWide() { BuildCallConstruct(); } |
| |
| void BytecodeGraphBuilder::BuildThrow() { |
| FrameStateBeforeAndAfter states(this); |
| Node* value = environment()->LookupAccumulator(); |
| Node* call = NewNode(javascript()->CallRuntime(Runtime::kThrow), value); |
| environment()->BindAccumulator(call, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitThrow() { |
| BuildThrow(); |
| Node* call = environment()->LookupAccumulator(); |
| Node* control = NewNode(common()->Throw(), call); |
| MergeControlToLeaveFunction(control); |
| } |
| |
| void BytecodeGraphBuilder::VisitReThrow() { |
| Node* value = environment()->LookupAccumulator(); |
| Node* call = NewNode(javascript()->CallRuntime(Runtime::kReThrow), value); |
| Node* control = NewNode(common()->Throw(), call); |
| MergeControlToLeaveFunction(control); |
| } |
| |
| void BytecodeGraphBuilder::BuildBinaryOp(const Operator* js_op) { |
| FrameStateBeforeAndAfter states(this); |
| Node* left = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Node* right = environment()->LookupAccumulator(); |
| Node* node = NewNode(js_op, left, right); |
| environment()->BindAccumulator(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitAdd() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->Add(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitSub() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->Subtract(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitMul() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->Multiply(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitDiv() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->Divide(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitMod() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->Modulus(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitBitwiseOr() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->BitwiseOr(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitBitwiseXor() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->BitwiseXor(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitBitwiseAnd() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->BitwiseAnd(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitShiftLeft() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->ShiftLeft(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitShiftRight() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->ShiftRight(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitShiftRightLogical() { |
| BinaryOperationHints hints = BinaryOperationHints::Any(); |
| BuildBinaryOp(javascript()->ShiftRightLogical(hints)); |
| } |
| |
| void BytecodeGraphBuilder::VisitInc() { |
| FrameStateBeforeAndAfter states(this); |
| const Operator* js_op = javascript()->Add(BinaryOperationHints::Any()); |
| Node* node = NewNode(js_op, environment()->LookupAccumulator(), |
| jsgraph()->OneConstant()); |
| environment()->BindAccumulator(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitDec() { |
| FrameStateBeforeAndAfter states(this); |
| const Operator* js_op = javascript()->Subtract(BinaryOperationHints::Any()); |
| Node* node = NewNode(js_op, environment()->LookupAccumulator(), |
| jsgraph()->OneConstant()); |
| environment()->BindAccumulator(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitLogicalNot() { |
| Node* value = NewNode(javascript()->ToBoolean(ToBooleanHint::kAny), |
| environment()->LookupAccumulator()); |
| Node* node = NewNode(common()->Select(MachineRepresentation::kTagged), value, |
| jsgraph()->FalseConstant(), jsgraph()->TrueConstant()); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::VisitTypeOf() { |
| Node* node = |
| NewNode(javascript()->TypeOf(), environment()->LookupAccumulator()); |
| environment()->BindAccumulator(node); |
| } |
| |
| void BytecodeGraphBuilder::BuildDelete(LanguageMode language_mode) { |
| FrameStateBeforeAndAfter states(this); |
| Node* key = environment()->LookupAccumulator(); |
| Node* object = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Node* node = |
| NewNode(javascript()->DeleteProperty(language_mode), object, key); |
| environment()->BindAccumulator(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitDeletePropertyStrict() { |
| BuildDelete(LanguageMode::STRICT); |
| } |
| |
| void BytecodeGraphBuilder::VisitDeletePropertySloppy() { |
| BuildDelete(LanguageMode::SLOPPY); |
| } |
| |
| void BytecodeGraphBuilder::BuildCompareOp(const Operator* js_op) { |
| FrameStateBeforeAndAfter states(this); |
| Node* left = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Node* right = environment()->LookupAccumulator(); |
| Node* node = NewNode(js_op, left, right); |
| environment()->BindAccumulator(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestEqual() { |
| BuildCompareOp(javascript()->Equal()); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestNotEqual() { |
| BuildCompareOp(javascript()->NotEqual()); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestEqualStrict() { |
| BuildCompareOp(javascript()->StrictEqual()); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestNotEqualStrict() { |
| BuildCompareOp(javascript()->StrictNotEqual()); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestLessThan() { |
| BuildCompareOp(javascript()->LessThan()); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestGreaterThan() { |
| BuildCompareOp(javascript()->GreaterThan()); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestLessThanOrEqual() { |
| BuildCompareOp(javascript()->LessThanOrEqual()); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestGreaterThanOrEqual() { |
| BuildCompareOp(javascript()->GreaterThanOrEqual()); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestIn() { |
| BuildCompareOp(javascript()->HasProperty()); |
| } |
| |
| void BytecodeGraphBuilder::VisitTestInstanceOf() { |
| BuildCompareOp(javascript()->InstanceOf()); |
| } |
| |
| void BytecodeGraphBuilder::BuildCastOperator(const Operator* js_op) { |
| FrameStateBeforeAndAfter states(this); |
| Node* node = NewNode(js_op, environment()->LookupAccumulator()); |
| environment()->BindAccumulator(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitToName() { |
| BuildCastOperator(javascript()->ToName()); |
| } |
| |
| void BytecodeGraphBuilder::VisitToObject() { |
| BuildCastOperator(javascript()->ToObject()); |
| } |
| |
| void BytecodeGraphBuilder::VisitToNumber() { |
| BuildCastOperator(javascript()->ToNumber()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJump() { BuildJump(); } |
| |
| void BytecodeGraphBuilder::VisitJumpConstant() { BuildJump(); } |
| |
| void BytecodeGraphBuilder::VisitJumpConstantWide() { BuildJump(); } |
| |
| void BytecodeGraphBuilder::VisitJumpIfTrue() { |
| BuildJumpIfEqual(jsgraph()->TrueConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfTrueConstant() { |
| BuildJumpIfEqual(jsgraph()->TrueConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfTrueConstantWide() { |
| BuildJumpIfEqual(jsgraph()->TrueConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfFalse() { |
| BuildJumpIfEqual(jsgraph()->FalseConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfFalseConstant() { |
| BuildJumpIfEqual(jsgraph()->FalseConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfFalseConstantWide() { |
| BuildJumpIfEqual(jsgraph()->FalseConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfToBooleanTrue() { |
| BuildJumpIfToBooleanEqual(jsgraph()->TrueConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfToBooleanTrueConstant() { |
| BuildJumpIfToBooleanEqual(jsgraph()->TrueConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfToBooleanTrueConstantWide() { |
| BuildJumpIfToBooleanEqual(jsgraph()->TrueConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfToBooleanFalse() { |
| BuildJumpIfToBooleanEqual(jsgraph()->FalseConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfToBooleanFalseConstant() { |
| BuildJumpIfToBooleanEqual(jsgraph()->FalseConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfToBooleanFalseConstantWide() { |
| BuildJumpIfToBooleanEqual(jsgraph()->FalseConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfNotHole() { BuildJumpIfNotHole(); } |
| |
| void BytecodeGraphBuilder::VisitJumpIfNotHoleConstant() { |
| BuildJumpIfNotHole(); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfNotHoleConstantWide() { |
| BuildJumpIfNotHole(); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfNull() { |
| BuildJumpIfEqual(jsgraph()->NullConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfNullConstant() { |
| BuildJumpIfEqual(jsgraph()->NullConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfNullConstantWide() { |
| BuildJumpIfEqual(jsgraph()->NullConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfUndefined() { |
| BuildJumpIfEqual(jsgraph()->UndefinedConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfUndefinedConstant() { |
| BuildJumpIfEqual(jsgraph()->UndefinedConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitJumpIfUndefinedConstantWide() { |
| BuildJumpIfEqual(jsgraph()->UndefinedConstant()); |
| } |
| |
| void BytecodeGraphBuilder::VisitStackCheck() { |
| FrameStateBeforeAndAfter states(this); |
| Node* node = NewNode(javascript()->StackCheck()); |
| environment()->RecordAfterState(node, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitReturn() { |
| Node* control = |
| NewNode(common()->Return(), environment()->LookupAccumulator()); |
| MergeControlToLeaveFunction(control); |
| } |
| |
| void BytecodeGraphBuilder::VisitDebugger() { |
| FrameStateBeforeAndAfter states(this); |
| Node* call = |
| NewNode(javascript()->CallRuntime(Runtime::kHandleDebuggerStatement)); |
| environment()->BindAccumulator(call, &states); |
| } |
| |
| // We cannot create a graph from the debugger copy of the bytecode array. |
| #define DEBUG_BREAK(Name, ...) \ |
| void BytecodeGraphBuilder::Visit##Name() { UNREACHABLE(); } |
| DEBUG_BREAK_BYTECODE_LIST(DEBUG_BREAK); |
| #undef DEBUG_BREAK |
| |
| void BytecodeGraphBuilder::BuildForInPrepare() { |
| FrameStateBeforeAndAfter states(this); |
| Node* receiver = environment()->LookupAccumulator(); |
| Node* prepare = NewNode(javascript()->ForInPrepare(), receiver); |
| environment()->BindRegistersToProjections( |
| bytecode_iterator().GetRegisterOperand(0), prepare, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitForInPrepare() { BuildForInPrepare(); } |
| |
| void BytecodeGraphBuilder::VisitForInPrepareWide() { BuildForInPrepare(); } |
| |
| void BytecodeGraphBuilder::VisitForInDone() { |
| FrameStateBeforeAndAfter states(this); |
| Node* index = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Node* cache_length = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(1)); |
| Node* exit_cond = NewNode(javascript()->ForInDone(), index, cache_length); |
| environment()->BindAccumulator(exit_cond, &states); |
| } |
| |
| void BytecodeGraphBuilder::BuildForInNext() { |
| FrameStateBeforeAndAfter states(this); |
| Node* receiver = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| Node* index = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(1)); |
| int catch_reg_pair_index = bytecode_iterator().GetRegisterOperand(2).index(); |
| Node* cache_type = environment()->LookupRegister( |
| interpreter::Register(catch_reg_pair_index)); |
| Node* cache_array = environment()->LookupRegister( |
| interpreter::Register(catch_reg_pair_index + 1)); |
| |
| Node* value = NewNode(javascript()->ForInNext(), receiver, cache_array, |
| cache_type, index); |
| environment()->BindAccumulator(value, &states); |
| } |
| |
| void BytecodeGraphBuilder::VisitForInNext() { BuildForInNext(); } |
| |
| void BytecodeGraphBuilder::VisitForInNextWide() { BuildForInNext(); } |
| |
| void BytecodeGraphBuilder::VisitForInStep() { |
| FrameStateBeforeAndAfter states(this); |
| Node* index = |
| environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0)); |
| index = NewNode(javascript()->ForInStep(), index); |
| environment()->BindAccumulator(index, &states); |
| } |
| |
| void BytecodeGraphBuilder::SwitchToMergeEnvironment(int current_offset) { |
| if (merge_environments_[current_offset] != nullptr) { |
| if (environment() != nullptr) { |
| merge_environments_[current_offset]->Merge(environment()); |
| } |
| set_environment(merge_environments_[current_offset]); |
| } |
| } |
| |
| void BytecodeGraphBuilder::BuildLoopHeaderEnvironment(int current_offset) { |
| if (branch_analysis()->backward_branches_target(current_offset)) { |
| // Add loop header and store a copy so we can connect merged back |
| // edge inputs to the loop header. |
| merge_environments_[current_offset] = environment()->CopyForLoop(); |
| } |
| } |
| |
| void BytecodeGraphBuilder::MergeIntoSuccessorEnvironment(int target_offset) { |
| if (merge_environments_[target_offset] == nullptr) { |
| // Append merge nodes to the environment. We may merge here with another |
| // environment. So add a place holder for merge nodes. We may add redundant |
| // but will be eliminated in a later pass. |
| // TODO(mstarzinger): Be smarter about this! |
| NewMerge(); |
| merge_environments_[target_offset] = environment(); |
| } else { |
| merge_environments_[target_offset]->Merge(environment()); |
| } |
| set_environment(nullptr); |
| } |
| |
| void BytecodeGraphBuilder::MergeControlToLeaveFunction(Node* exit) { |
| exit_controls_.push_back(exit); |
| set_environment(nullptr); |
| } |
| |
| void BytecodeGraphBuilder::BuildJump() { |
| MergeIntoSuccessorEnvironment(bytecode_iterator().GetJumpTargetOffset()); |
| } |
| |
| |
| void BytecodeGraphBuilder::BuildConditionalJump(Node* condition) { |
| NewBranch(condition); |
| Environment* if_false_environment = environment()->CopyForConditional(); |
| NewIfTrue(); |
| MergeIntoSuccessorEnvironment(bytecode_iterator().GetJumpTargetOffset()); |
| set_environment(if_false_environment); |
| NewIfFalse(); |
| } |
| |
| |
| void BytecodeGraphBuilder::BuildJumpIfEqual(Node* comperand) { |
| Node* accumulator = environment()->LookupAccumulator(); |
| Node* condition = |
| NewNode(javascript()->StrictEqual(), accumulator, comperand); |
| BuildConditionalJump(condition); |
| } |
| |
| |
| void BytecodeGraphBuilder::BuildJumpIfToBooleanEqual(Node* comperand) { |
| Node* accumulator = environment()->LookupAccumulator(); |
| Node* to_boolean = |
| NewNode(javascript()->ToBoolean(ToBooleanHint::kAny), accumulator); |
| Node* condition = NewNode(javascript()->StrictEqual(), to_boolean, comperand); |
| BuildConditionalJump(condition); |
| } |
| |
| void BytecodeGraphBuilder::BuildJumpIfNotHole() { |
| Node* accumulator = environment()->LookupAccumulator(); |
| Node* condition = NewNode(javascript()->StrictEqual(), accumulator, |
| jsgraph()->TheHoleConstant()); |
| Node* node = |
| NewNode(common()->Select(MachineRepresentation::kTagged), condition, |
| jsgraph()->FalseConstant(), jsgraph()->TrueConstant()); |
| BuildConditionalJump(node); |
| } |
| |
| Node** BytecodeGraphBuilder::EnsureInputBufferSize(int size) { |
| if (size > input_buffer_size_) { |
| size = size + kInputBufferSizeIncrement + input_buffer_size_; |
| input_buffer_ = local_zone()->NewArray<Node*>(size); |
| input_buffer_size_ = size; |
| } |
| return input_buffer_; |
| } |
| |
| void BytecodeGraphBuilder::EnterAndExitExceptionHandlers(int current_offset) { |
| Handle<HandlerTable> table = exception_handler_table(); |
| int num_entries = table->NumberOfRangeEntries(); |
| |
| // Potentially exit exception handlers. |
| while (!exception_handlers_.empty()) { |
| int current_end = exception_handlers_.top().end_offset_; |
| if (current_offset < current_end) break; // Still covered by range. |
| exception_handlers_.pop(); |
| } |
| |
| // Potentially enter exception handlers. |
| while (current_exception_handler_ < num_entries) { |
| int next_start = table->GetRangeStart(current_exception_handler_); |
| if (current_offset < next_start) break; // Not yet covered by range. |
| int next_end = table->GetRangeEnd(current_exception_handler_); |
| int next_handler = table->GetRangeHandler(current_exception_handler_); |
| int context_register = table->GetRangeData(current_exception_handler_); |
| CatchPrediction pred = |
| table->GetRangePrediction(current_exception_handler_); |
| exception_handlers_.push( |
| {next_start, next_end, next_handler, context_register, pred}); |
| current_exception_handler_++; |
| } |
| } |
| |
| Node* BytecodeGraphBuilder::MakeNode(const Operator* op, int value_input_count, |
| Node** value_inputs, bool incomplete) { |
| DCHECK_EQ(op->ValueInputCount(), value_input_count); |
| |
| bool has_context = OperatorProperties::HasContextInput(op); |
| int frame_state_count = OperatorProperties::GetFrameStateInputCount(op); |
| bool has_control = op->ControlInputCount() == 1; |
| bool has_effect = op->EffectInputCount() == 1; |
| |
| DCHECK_LT(op->ControlInputCount(), 2); |
| DCHECK_LT(op->EffectInputCount(), 2); |
| |
| Node* result = nullptr; |
| if (!has_context && frame_state_count == 0 && !has_control && !has_effect) { |
| result = graph()->NewNode(op, value_input_count, value_inputs, incomplete); |
| } else { |
| bool inside_handler = !exception_handlers_.empty(); |
| int input_count_with_deps = value_input_count; |
| if (has_context) ++input_count_with_deps; |
| input_count_with_deps += frame_state_count; |
| if (has_control) ++input_count_with_deps; |
| if (has_effect) ++input_count_with_deps; |
| Node** buffer = EnsureInputBufferSize(input_count_with_deps); |
| memcpy(buffer, value_inputs, kPointerSize * value_input_count); |
| Node** current_input = buffer + value_input_count; |
| if (has_context) { |
| *current_input++ = environment()->Context(); |
| } |
| for (int i = 0; i < frame_state_count; i++) { |
| // The frame state will be inserted later. Here we misuse |
| // the {Dead} node as a sentinel to be later overwritten |
| // with the real frame state. |
| *current_input++ = jsgraph()->Dead(); |
| } |
| if (has_effect) { |
| *current_input++ = environment()->GetEffectDependency(); |
| } |
| if (has_control) { |
| *current_input++ = environment()->GetControlDependency(); |
| } |
| result = graph()->NewNode(op, input_count_with_deps, buffer, incomplete); |
| // Update the current control dependency for control-producing nodes. |
| if (NodeProperties::IsControl(result)) { |
| environment()->UpdateControlDependency(result); |
| } |
| // Update the current effect dependency for effect-producing nodes. |
| if (result->op()->EffectOutputCount() > 0) { |
| environment()->UpdateEffectDependency(result); |
| } |
| // Add implicit exception continuation for throwing nodes. |
| if (!result->op()->HasProperty(Operator::kNoThrow) && inside_handler) { |
| int handler_offset = exception_handlers_.top().handler_offset_; |
| int context_index = exception_handlers_.top().context_register_; |
| CatchPrediction prediction = exception_handlers_.top().pred_; |
| interpreter::Register context_register(context_index); |
| IfExceptionHint hint = prediction == CatchPrediction::CAUGHT |
| ? IfExceptionHint::kLocallyCaught |
| : IfExceptionHint::kLocallyUncaught; |
| Environment* success_env = environment()->CopyForConditional(); |
| const Operator* op = common()->IfException(hint); |
| Node* effect = environment()->GetEffectDependency(); |
| Node* on_exception = graph()->NewNode(op, effect, result); |
| Node* context = environment()->LookupRegister(context_register); |
| environment()->UpdateControlDependency(on_exception); |
| environment()->UpdateEffectDependency(on_exception); |
| environment()->BindAccumulator(on_exception); |
| environment()->SetContext(context); |
| MergeIntoSuccessorEnvironment(handler_offset); |
| set_environment(success_env); |
| } |
| // Add implicit success continuation for throwing nodes. |
| if (!result->op()->HasProperty(Operator::kNoThrow)) { |
| const Operator* if_success = common()->IfSuccess(); |
| Node* on_success = graph()->NewNode(if_success, result); |
| environment()->UpdateControlDependency(on_success); |
| } |
| } |
| |
| return result; |
| } |
| |
| |
| Node* BytecodeGraphBuilder::NewPhi(int count, Node* input, Node* control) { |
| const Operator* phi_op = common()->Phi(MachineRepresentation::kTagged, count); |
| Node** buffer = EnsureInputBufferSize(count + 1); |
| MemsetPointer(buffer, input, count); |
| buffer[count] = control; |
| return graph()->NewNode(phi_op, count + 1, buffer, true); |
| } |
| |
| |
| Node* BytecodeGraphBuilder::NewEffectPhi(int count, Node* input, |
| Node* control) { |
| const Operator* phi_op = common()->EffectPhi(count); |
| Node** buffer = EnsureInputBufferSize(count + 1); |
| MemsetPointer(buffer, input, count); |
| buffer[count] = control; |
| return graph()->NewNode(phi_op, count + 1, buffer, true); |
| } |
| |
| |
| Node* BytecodeGraphBuilder::MergeControl(Node* control, Node* other) { |
| int inputs = control->op()->ControlInputCount() + 1; |
| if (control->opcode() == IrOpcode::kLoop) { |
| // Control node for loop exists, add input. |
| const Operator* op = common()->Loop(inputs); |
| control->AppendInput(graph_zone(), other); |
| NodeProperties::ChangeOp(control, op); |
| } else if (control->opcode() == IrOpcode::kMerge) { |
| // Control node for merge exists, add input. |
| const Operator* op = common()->Merge(inputs); |
| control->AppendInput(graph_zone(), other); |
| NodeProperties::ChangeOp(control, op); |
| } else { |
| // Control node is a singleton, introduce a merge. |
| const Operator* op = common()->Merge(inputs); |
| Node* merge_inputs[] = {control, other}; |
| control = graph()->NewNode(op, arraysize(merge_inputs), merge_inputs, true); |
| } |
| return control; |
| } |
| |
| |
| Node* BytecodeGraphBuilder::MergeEffect(Node* value, Node* other, |
| Node* control) { |
| int inputs = control->op()->ControlInputCount(); |
| if (value->opcode() == IrOpcode::kEffectPhi && |
| NodeProperties::GetControlInput(value) == control) { |
| // Phi already exists, add input. |
| value->InsertInput(graph_zone(), inputs - 1, other); |
| NodeProperties::ChangeOp(value, common()->EffectPhi(inputs)); |
| } else if (value != other) { |
| // Phi does not exist yet, introduce one. |
| value = NewEffectPhi(inputs, value, control); |
| value->ReplaceInput(inputs - 1, other); |
| } |
| return value; |
| } |
| |
| |
| Node* BytecodeGraphBuilder::MergeValue(Node* value, Node* other, |
| Node* control) { |
| int inputs = control->op()->ControlInputCount(); |
| if (value->opcode() == IrOpcode::kPhi && |
| NodeProperties::GetControlInput(value) == control) { |
| // Phi already exists, add input. |
| value->InsertInput(graph_zone(), inputs - 1, other); |
| NodeProperties::ChangeOp( |
| value, common()->Phi(MachineRepresentation::kTagged, inputs)); |
| } else if (value != other) { |
| // Phi does not exist yet, introduce one. |
| value = NewPhi(inputs, value, control); |
| value->ReplaceInput(inputs - 1, other); |
| } |
| return value; |
| } |
| |
| } // namespace compiler |
| } // namespace internal |
| } // namespace v8 |