// 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/interpreter/interpreter.h"
#include <fstream>
#include <memory>
#include "src/ast/prettyprinter.h"
#include "src/code-factory.h"
#include "src/compilation-info.h"
#include "src/compiler.h"
#include "src/factory.h"
#include "src/interpreter/bytecode-flags.h"
#include "src/interpreter/bytecode-generator.h"
#include "src/interpreter/bytecodes.h"
#include "src/interpreter/interpreter-assembler.h"
#include "src/interpreter/interpreter-intrinsics.h"
#include "src/log.h"
#include "src/zone/zone.h"
namespace v8 {
namespace internal {
namespace interpreter {
using compiler::Node;
typedef CodeStubAssembler::Label Label;
typedef CodeStubAssembler::Variable Variable;
typedef InterpreterAssembler::Arg Arg;
#define __ assembler->
class InterpreterCompilationJob final : public CompilationJob {
public:
explicit InterpreterCompilationJob(CompilationInfo* info);
protected:
Status PrepareJobImpl() final;
Status ExecuteJobImpl() final;
Status FinalizeJobImpl() final;
private:
BytecodeGenerator* generator() { return &generator_; }
BytecodeGenerator generator_;
DISALLOW_COPY_AND_ASSIGN(InterpreterCompilationJob);
};
Interpreter::Interpreter(Isolate* isolate) : isolate_(isolate) {
memset(dispatch_table_, 0, sizeof(dispatch_table_));
}
void Interpreter::Initialize() {
if (!ShouldInitializeDispatchTable()) return;
Zone zone(isolate_->allocator(), ZONE_NAME);
HandleScope scope(isolate_);
if (FLAG_trace_ignition_dispatches) {
static const int kBytecodeCount = static_cast<int>(Bytecode::kLast) + 1;
bytecode_dispatch_counters_table_.reset(
new uintptr_t[kBytecodeCount * kBytecodeCount]);
memset(bytecode_dispatch_counters_table_.get(), 0,
sizeof(uintptr_t) * kBytecodeCount * kBytecodeCount);
}
// Generate bytecode handlers for all bytecodes and scales.
const OperandScale kOperandScales[] = {
#define VALUE(Name, _) OperandScale::k##Name,
OPERAND_SCALE_LIST(VALUE)
#undef VALUE
};
for (OperandScale operand_scale : kOperandScales) {
#define GENERATE_CODE(Name, ...) \
{ \
if (Bytecodes::BytecodeHasHandler(Bytecode::k##Name, operand_scale)) { \
InterpreterAssembler assembler(isolate_, &zone, Bytecode::k##Name, \
operand_scale); \
Do##Name(&assembler); \
Handle<Code> code = assembler.GenerateCode(); \
size_t index = GetDispatchTableIndex(Bytecode::k##Name, operand_scale); \
dispatch_table_[index] = code->entry(); \
TraceCodegen(code); \
PROFILE( \
isolate_, \
CodeCreateEvent( \
CodeEventListener::BYTECODE_HANDLER_TAG, \
AbstractCode::cast(*code), \
Bytecodes::ToString(Bytecode::k##Name, operand_scale).c_str())); \
} \
}
BYTECODE_LIST(GENERATE_CODE)
#undef GENERATE_CODE
}
// Fill unused entries will the illegal bytecode handler.
size_t illegal_index =
GetDispatchTableIndex(Bytecode::kIllegal, OperandScale::kSingle);
for (size_t index = 0; index < arraysize(dispatch_table_); ++index) {
if (dispatch_table_[index] == nullptr) {
dispatch_table_[index] = dispatch_table_[illegal_index];
}
}
// Initialization should have been successful.
DCHECK(IsDispatchTableInitialized());
}
Code* Interpreter::GetBytecodeHandler(Bytecode bytecode,
OperandScale operand_scale) {
DCHECK(IsDispatchTableInitialized());
DCHECK(Bytecodes::BytecodeHasHandler(bytecode, operand_scale));
size_t index = GetDispatchTableIndex(bytecode, operand_scale);
Address code_entry = dispatch_table_[index];
return Code::GetCodeFromTargetAddress(code_entry);
}
// static
size_t Interpreter::GetDispatchTableIndex(Bytecode bytecode,
OperandScale operand_scale) {
static const size_t kEntriesPerOperandScale = 1u << kBitsPerByte;
size_t index = static_cast<size_t>(bytecode);
switch (operand_scale) {
case OperandScale::kSingle:
return index;
case OperandScale::kDouble:
return index + kEntriesPerOperandScale;
case OperandScale::kQuadruple:
return index + 2 * kEntriesPerOperandScale;
}
UNREACHABLE();
return 0;
}
void Interpreter::IterateDispatchTable(ObjectVisitor* v) {
for (int i = 0; i < kDispatchTableSize; i++) {
Address code_entry = dispatch_table_[i];
Object* code = code_entry == nullptr
? nullptr
: Code::GetCodeFromTargetAddress(code_entry);
Object* old_code = code;
v->VisitPointer(&code);
if (code != old_code) {
dispatch_table_[i] = reinterpret_cast<Code*>(code)->entry();
}
}
}
// static
int Interpreter::InterruptBudget() {
return FLAG_interrupt_budget * kCodeSizeMultiplier;
}
InterpreterCompilationJob::InterpreterCompilationJob(CompilationInfo* info)
: CompilationJob(info->isolate(), info, "Ignition"), generator_(info) {}
InterpreterCompilationJob::Status InterpreterCompilationJob::PrepareJobImpl() {
if (FLAG_print_bytecode || FLAG_print_ast) {
OFStream os(stdout);
std::unique_ptr<char[]> name = info()->GetDebugName();
os << "[generating bytecode for function: " << info()->GetDebugName().get()
<< "]" << std::endl
<< std::flush;
}
#ifdef DEBUG
if (info()->parse_info() && FLAG_print_ast) {
OFStream os(stdout);
os << "--- AST ---" << std::endl
<< AstPrinter(info()->isolate()).PrintProgram(info()->literal())
<< std::endl
<< std::flush;
}
#endif // DEBUG
return SUCCEEDED;
}
InterpreterCompilationJob::Status InterpreterCompilationJob::ExecuteJobImpl() {
// TODO(5203): These timers aren't thread safe, move to using the CompilerJob
// timers.
RuntimeCallTimerScope runtimeTimer(info()->isolate(),
&RuntimeCallStats::CompileIgnition);
TimerEventScope<TimerEventCompileIgnition> timer(info()->isolate());
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.CompileIgnition");
generator()->GenerateBytecode(stack_limit());
if (generator()->HasStackOverflow()) {
return FAILED;
}
return SUCCEEDED;
}
InterpreterCompilationJob::Status InterpreterCompilationJob::FinalizeJobImpl() {
Handle<BytecodeArray> bytecodes = generator()->FinalizeBytecode(isolate());
if (generator()->HasStackOverflow()) {
return FAILED;
}
CodeGenerator::MakeCodePrologue(info(), "interpreter");
if (FLAG_print_bytecode) {
OFStream os(stdout);
bytecodes->Print(os);
os << std::flush;
}
info()->SetBytecodeArray(bytecodes);
info()->SetCode(info()->isolate()->builtins()->InterpreterEntryTrampoline());
return SUCCEEDED;
}
CompilationJob* Interpreter::NewCompilationJob(CompilationInfo* info) {
return new InterpreterCompilationJob(info);
}
bool Interpreter::IsDispatchTableInitialized() {
return dispatch_table_[0] != nullptr;
}
bool Interpreter::ShouldInitializeDispatchTable() {
if (FLAG_trace_ignition || FLAG_trace_ignition_codegen ||
FLAG_trace_ignition_dispatches) {
// Regenerate table to add bytecode tracing operations, print the assembly
// code generated by TurboFan or instrument handlers with dispatch counters.
return true;
}
return !IsDispatchTableInitialized();
}
void Interpreter::TraceCodegen(Handle<Code> code) {
#ifdef ENABLE_DISASSEMBLER
if (FLAG_trace_ignition_codegen) {
OFStream os(stdout);
code->Disassemble(nullptr, os);
os << std::flush;
}
#endif // ENABLE_DISASSEMBLER
}
const char* Interpreter::LookupNameOfBytecodeHandler(Code* code) {
#ifdef ENABLE_DISASSEMBLER
#define RETURN_NAME(Name, ...) \
if (dispatch_table_[Bytecodes::ToByte(Bytecode::k##Name)] == \
code->entry()) { \
return #Name; \
}
BYTECODE_LIST(RETURN_NAME)
#undef RETURN_NAME
#endif // ENABLE_DISASSEMBLER
return nullptr;
}
uintptr_t Interpreter::GetDispatchCounter(Bytecode from, Bytecode to) const {
int from_index = Bytecodes::ToByte(from);
int to_index = Bytecodes::ToByte(to);
return bytecode_dispatch_counters_table_[from_index * kNumberOfBytecodes +
to_index];
}
Local<v8::Object> Interpreter::GetDispatchCountersObject() {
v8::Isolate* isolate = reinterpret_cast<v8::Isolate*>(isolate_);
Local<v8::Context> context = isolate->GetCurrentContext();
Local<v8::Object> counters_map = v8::Object::New(isolate);
// Output is a JSON-encoded object of objects.
//
// The keys on the top level object are source bytecodes,
// and corresponding value are objects. Keys on these last are the
// destinations of the dispatch and the value associated is a counter for
// the correspondent source-destination dispatch chain.
//
// Only non-zero counters are written to file, but an entry in the top-level
// object is always present, even if the value is empty because all counters
// for that source are zero.
for (int from_index = 0; from_index < kNumberOfBytecodes; ++from_index) {
Bytecode from_bytecode = Bytecodes::FromByte(from_index);
Local<v8::Object> counters_row = v8::Object::New(isolate);
for (int to_index = 0; to_index < kNumberOfBytecodes; ++to_index) {
Bytecode to_bytecode = Bytecodes::FromByte(to_index);
uintptr_t counter = GetDispatchCounter(from_bytecode, to_bytecode);
if (counter > 0) {
std::string to_name = Bytecodes::ToString(to_bytecode);
Local<v8::String> to_name_object =
v8::String::NewFromUtf8(isolate, to_name.c_str(),
NewStringType::kNormal)
.ToLocalChecked();
Local<v8::Number> counter_object = v8::Number::New(isolate, counter);
CHECK(counters_row
->DefineOwnProperty(context, to_name_object, counter_object)
.IsJust());
}
}
std::string from_name = Bytecodes::ToString(from_bytecode);
Local<v8::String> from_name_object =
v8::String::NewFromUtf8(isolate, from_name.c_str(),
NewStringType::kNormal)
.ToLocalChecked();
CHECK(
counters_map->DefineOwnProperty(context, from_name_object, counters_row)
.IsJust());
}
return counters_map;
}
// LdaZero
//
// Load literal '0' into the accumulator.
void Interpreter::DoLdaZero(InterpreterAssembler* assembler) {
Node* zero_value = __ NumberConstant(0.0);
__ SetAccumulator(zero_value);
__ Dispatch();
}
// LdaSmi <imm>
//
// Load an integer literal into the accumulator as a Smi.
void Interpreter::DoLdaSmi(InterpreterAssembler* assembler) {
Node* raw_int = __ BytecodeOperandImm(0);
Node* smi_int = __ SmiTag(raw_int);
__ SetAccumulator(smi_int);
__ Dispatch();
}
// LdaConstant <idx>
//
// Load constant literal at |idx| in the constant pool into the accumulator.
void Interpreter::DoLdaConstant(InterpreterAssembler* assembler) {
Node* index = __ BytecodeOperandIdx(0);
Node* constant = __ LoadConstantPoolEntry(index);
__ SetAccumulator(constant);
__ Dispatch();
}
// LdaUndefined
//
// Load Undefined into the accumulator.
void Interpreter::DoLdaUndefined(InterpreterAssembler* assembler) {
Node* undefined_value =
__ HeapConstant(isolate_->factory()->undefined_value());
__ SetAccumulator(undefined_value);
__ Dispatch();
}
// LdaNull
//
// Load Null into the accumulator.
void Interpreter::DoLdaNull(InterpreterAssembler* assembler) {
Node* null_value = __ HeapConstant(isolate_->factory()->null_value());
__ SetAccumulator(null_value);
__ Dispatch();
}
// LdaTheHole
//
// Load TheHole into the accumulator.
void Interpreter::DoLdaTheHole(InterpreterAssembler* assembler) {
Node* the_hole_value = __ HeapConstant(isolate_->factory()->the_hole_value());
__ SetAccumulator(the_hole_value);
__ Dispatch();
}
// LdaTrue
//
// Load True into the accumulator.
void Interpreter::DoLdaTrue(InterpreterAssembler* assembler) {
Node* true_value = __ HeapConstant(isolate_->factory()->true_value());
__ SetAccumulator(true_value);
__ Dispatch();
}
// LdaFalse
//
// Load False into the accumulator.
void Interpreter::DoLdaFalse(InterpreterAssembler* assembler) {
Node* false_value = __ HeapConstant(isolate_->factory()->false_value());
__ SetAccumulator(false_value);
__ Dispatch();
}
// Ldar <src>
//
// Load accumulator with value from register <src>.
void Interpreter::DoLdar(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* value = __ LoadRegister(reg_index);
__ SetAccumulator(value);
__ Dispatch();
}
// Star <dst>
//
// Store accumulator to register <dst>.
void Interpreter::DoStar(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* accumulator = __ GetAccumulator();
__ StoreRegister(accumulator, reg_index);
__ Dispatch();
}
// Mov <src> <dst>
//
// Stores the value of register <src> to register <dst>.
void Interpreter::DoMov(InterpreterAssembler* assembler) {
Node* src_index = __ BytecodeOperandReg(0);
Node* src_value = __ LoadRegister(src_index);
Node* dst_index = __ BytecodeOperandReg(1);
__ StoreRegister(src_value, dst_index);
__ Dispatch();
}
Node* Interpreter::BuildLoadGlobal(Callable ic, Node* context,
Node* feedback_slot,
InterpreterAssembler* assembler) {
typedef LoadGlobalWithVectorDescriptor Descriptor;
// Load the global via the LoadGlobalIC.
Node* code_target = __ HeapConstant(ic.code());
Node* smi_slot = __ SmiTag(feedback_slot);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
return __ CallStub(ic.descriptor(), code_target, context,
Arg(Descriptor::kSlot, smi_slot),
Arg(Descriptor::kVector, type_feedback_vector));
}
// LdaGlobal <slot>
//
// Load the global with name in constant pool entry <name_index> into the
// accumulator using FeedBackVector slot <slot> outside of a typeof.
void Interpreter::DoLdaGlobal(InterpreterAssembler* assembler) {
Callable ic =
CodeFactory::LoadGlobalICInOptimizedCode(isolate_, NOT_INSIDE_TYPEOF);
Node* context = __ GetContext();
Node* raw_slot = __ BytecodeOperandIdx(0);
Node* result = BuildLoadGlobal(ic, context, raw_slot, assembler);
__ SetAccumulator(result);
__ Dispatch();
}
// LdaGlobalInsideTypeof <slot>
//
// Load the global with name in constant pool entry <name_index> into the
// accumulator using FeedBackVector slot <slot> inside of a typeof.
void Interpreter::DoLdaGlobalInsideTypeof(InterpreterAssembler* assembler) {
Callable ic =
CodeFactory::LoadGlobalICInOptimizedCode(isolate_, INSIDE_TYPEOF);
Node* context = __ GetContext();
Node* raw_slot = __ BytecodeOperandIdx(0);
Node* result = BuildLoadGlobal(ic, context, raw_slot, assembler);
__ SetAccumulator(result);
__ Dispatch();
}
void Interpreter::DoStaGlobal(Callable ic, InterpreterAssembler* assembler) {
typedef StoreWithVectorDescriptor Descriptor;
// Get the global object.
Node* context = __ GetContext();
Node* native_context = __ LoadNativeContext(context);
Node* global =
__ LoadContextElement(native_context, Context::EXTENSION_INDEX);
// Store the global via the StoreIC.
Node* code_target = __ HeapConstant(ic.code());
Node* constant_index = __ BytecodeOperandIdx(0);
Node* name = __ LoadConstantPoolEntry(constant_index);
Node* value = __ GetAccumulator();
Node* raw_slot = __ BytecodeOperandIdx(1);
Node* smi_slot = __ SmiTag(raw_slot);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
__ CallStub(ic.descriptor(), code_target, context,
Arg(Descriptor::kReceiver, global), Arg(Descriptor::kName, name),
Arg(Descriptor::kValue, value), Arg(Descriptor::kSlot, smi_slot),
Arg(Descriptor::kVector, type_feedback_vector));
__ Dispatch();
}
// StaGlobalSloppy <name_index> <slot>
//
// Store the value in the accumulator into the global with name in constant pool
// entry <name_index> using FeedBackVector slot <slot> in sloppy mode.
void Interpreter::DoStaGlobalSloppy(InterpreterAssembler* assembler) {
Callable ic = CodeFactory::StoreICInOptimizedCode(isolate_, SLOPPY);
DoStaGlobal(ic, assembler);
}
// StaGlobalStrict <name_index> <slot>
//
// Store the value in the accumulator into the global with name in constant pool
// entry <name_index> using FeedBackVector slot <slot> in strict mode.
void Interpreter::DoStaGlobalStrict(InterpreterAssembler* assembler) {
Callable ic = CodeFactory::StoreICInOptimizedCode(isolate_, STRICT);
DoStaGlobal(ic, assembler);
}
// LdaContextSlot <context> <slot_index> <depth>
//
// Load the object in |slot_index| of the context at |depth| in the context
// chain starting at |context| into the accumulator.
void Interpreter::DoLdaContextSlot(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* context = __ LoadRegister(reg_index);
Node* slot_index = __ BytecodeOperandIdx(1);
Node* depth = __ BytecodeOperandUImm(2);
Node* slot_context = __ GetContextAtDepth(context, depth);
Node* result = __ LoadContextElement(slot_context, slot_index);
__ SetAccumulator(result);
__ Dispatch();
}
// LdaCurrentContextSlot <slot_index>
//
// Load the object in |slot_index| of the current context into the accumulator.
void Interpreter::DoLdaCurrentContextSlot(InterpreterAssembler* assembler) {
Node* slot_index = __ BytecodeOperandIdx(0);
Node* slot_context = __ GetContext();
Node* result = __ LoadContextElement(slot_context, slot_index);
__ SetAccumulator(result);
__ Dispatch();
}
// StaContextSlot <context> <slot_index> <depth>
//
// Stores the object in the accumulator into |slot_index| of the context at
// |depth| in the context chain starting at |context|.
void Interpreter::DoStaContextSlot(InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* reg_index = __ BytecodeOperandReg(0);
Node* context = __ LoadRegister(reg_index);
Node* slot_index = __ BytecodeOperandIdx(1);
Node* depth = __ BytecodeOperandUImm(2);
Node* slot_context = __ GetContextAtDepth(context, depth);
__ StoreContextElement(slot_context, slot_index, value);
__ Dispatch();
}
// StaCurrentContextSlot <slot_index>
//
// Stores the object in the accumulator into |slot_index| of the current
// context.
void Interpreter::DoStaCurrentContextSlot(InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* slot_index = __ BytecodeOperandIdx(0);
Node* slot_context = __ GetContext();
__ StoreContextElement(slot_context, slot_index, value);
__ Dispatch();
}
void Interpreter::DoLdaLookupSlot(Runtime::FunctionId function_id,
InterpreterAssembler* assembler) {
Node* name_index = __ BytecodeOperandIdx(0);
Node* name = __ LoadConstantPoolEntry(name_index);
Node* context = __ GetContext();
Node* result = __ CallRuntime(function_id, context, name);
__ SetAccumulator(result);
__ Dispatch();
}
// LdaLookupSlot <name_index>
//
// Lookup the object with the name in constant pool entry |name_index|
// dynamically.
void Interpreter::DoLdaLookupSlot(InterpreterAssembler* assembler) {
DoLdaLookupSlot(Runtime::kLoadLookupSlot, assembler);
}
// LdaLookupSlotInsideTypeof <name_index>
//
// Lookup the object with the name in constant pool entry |name_index|
// dynamically without causing a NoReferenceError.
void Interpreter::DoLdaLookupSlotInsideTypeof(InterpreterAssembler* assembler) {
DoLdaLookupSlot(Runtime::kLoadLookupSlotInsideTypeof, assembler);
}
void Interpreter::DoLdaLookupContextSlot(Runtime::FunctionId function_id,
InterpreterAssembler* assembler) {
Node* context = __ GetContext();
Node* name_index = __ BytecodeOperandIdx(0);
Node* slot_index = __ BytecodeOperandIdx(1);
Node* depth = __ BytecodeOperandUImm(2);
Label slowpath(assembler, Label::kDeferred);
// Check for context extensions to allow the fast path.
__ GotoIfHasContextExtensionUpToDepth(context, depth, &slowpath);
// Fast path does a normal load context.
{
Node* slot_context = __ GetContextAtDepth(context, depth);
Node* result = __ LoadContextElement(slot_context, slot_index);
__ SetAccumulator(result);
__ Dispatch();
}
// Slow path when we have to call out to the runtime.
__ Bind(&slowpath);
{
Node* name = __ LoadConstantPoolEntry(name_index);
Node* result = __ CallRuntime(function_id, context, name);
__ SetAccumulator(result);
__ Dispatch();
}
}
// LdaLookupSlot <name_index>
//
// Lookup the object with the name in constant pool entry |name_index|
// dynamically.
void Interpreter::DoLdaLookupContextSlot(InterpreterAssembler* assembler) {
DoLdaLookupContextSlot(Runtime::kLoadLookupSlot, assembler);
}
// LdaLookupSlotInsideTypeof <name_index>
//
// Lookup the object with the name in constant pool entry |name_index|
// dynamically without causing a NoReferenceError.
void Interpreter::DoLdaLookupContextSlotInsideTypeof(
InterpreterAssembler* assembler) {
DoLdaLookupContextSlot(Runtime::kLoadLookupSlotInsideTypeof, assembler);
}
void Interpreter::DoLdaLookupGlobalSlot(Runtime::FunctionId function_id,
InterpreterAssembler* assembler) {
Node* context = __ GetContext();
Node* name_index = __ BytecodeOperandIdx(0);
Node* feedback_slot = __ BytecodeOperandIdx(1);
Node* depth = __ BytecodeOperandUImm(2);
Label slowpath(assembler, Label::kDeferred);
// Check for context extensions to allow the fast path
__ GotoIfHasContextExtensionUpToDepth(context, depth, &slowpath);
// Fast path does a normal load global
{
Callable ic = CodeFactory::LoadGlobalICInOptimizedCode(
isolate_, function_id == Runtime::kLoadLookupSlotInsideTypeof
? INSIDE_TYPEOF
: NOT_INSIDE_TYPEOF);
Node* result = BuildLoadGlobal(ic, context, feedback_slot, assembler);
__ SetAccumulator(result);
__ Dispatch();
}
// Slow path when we have to call out to the runtime
__ Bind(&slowpath);
{
Node* name = __ LoadConstantPoolEntry(name_index);
Node* result = __ CallRuntime(function_id, context, name);
__ SetAccumulator(result);
__ Dispatch();
}
}
// LdaLookupGlobalSlot <name_index> <feedback_slot> <depth>
//
// Lookup the object with the name in constant pool entry |name_index|
// dynamically.
void Interpreter::DoLdaLookupGlobalSlot(InterpreterAssembler* assembler) {
DoLdaLookupGlobalSlot(Runtime::kLoadLookupSlot, assembler);
}
// LdaLookupGlobalSlotInsideTypeof <name_index> <feedback_slot> <depth>
//
// Lookup the object with the name in constant pool entry |name_index|
// dynamically without causing a NoReferenceError.
void Interpreter::DoLdaLookupGlobalSlotInsideTypeof(
InterpreterAssembler* assembler) {
DoLdaLookupGlobalSlot(Runtime::kLoadLookupSlotInsideTypeof, assembler);
}
void Interpreter::DoStaLookupSlot(LanguageMode language_mode,
InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* index = __ BytecodeOperandIdx(0);
Node* name = __ LoadConstantPoolEntry(index);
Node* context = __ GetContext();
Node* result = __ CallRuntime(is_strict(language_mode)
? Runtime::kStoreLookupSlot_Strict
: Runtime::kStoreLookupSlot_Sloppy,
context, name, value);
__ SetAccumulator(result);
__ Dispatch();
}
// StaLookupSlotSloppy <name_index>
//
// Store the object in accumulator to the object with the name in constant
// pool entry |name_index| in sloppy mode.
void Interpreter::DoStaLookupSlotSloppy(InterpreterAssembler* assembler) {
DoStaLookupSlot(LanguageMode::SLOPPY, assembler);
}
// StaLookupSlotStrict <name_index>
//
// Store the object in accumulator to the object with the name in constant
// pool entry |name_index| in strict mode.
void Interpreter::DoStaLookupSlotStrict(InterpreterAssembler* assembler) {
DoStaLookupSlot(LanguageMode::STRICT, assembler);
}
// LdaNamedProperty <object> <name_index> <slot>
//
// Calls the LoadIC at FeedBackVector slot <slot> for <object> and the name at
// constant pool entry <name_index>.
void Interpreter::DoLdaNamedProperty(InterpreterAssembler* assembler) {
typedef LoadWithVectorDescriptor Descriptor;
Callable ic = CodeFactory::LoadICInOptimizedCode(isolate_);
Node* code_target = __ HeapConstant(ic.code());
Node* register_index = __ BytecodeOperandReg(0);
Node* object = __ LoadRegister(register_index);
Node* constant_index = __ BytecodeOperandIdx(1);
Node* name = __ LoadConstantPoolEntry(constant_index);
Node* raw_slot = __ BytecodeOperandIdx(2);
Node* smi_slot = __ SmiTag(raw_slot);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Node* context = __ GetContext();
Node* result = __ CallStub(
ic.descriptor(), code_target, context, Arg(Descriptor::kReceiver, object),
Arg(Descriptor::kName, name), Arg(Descriptor::kSlot, smi_slot),
Arg(Descriptor::kVector, type_feedback_vector));
__ SetAccumulator(result);
__ Dispatch();
}
// KeyedLoadIC <object> <slot>
//
// Calls the KeyedLoadIC at FeedBackVector slot <slot> for <object> and the key
// in the accumulator.
void Interpreter::DoLdaKeyedProperty(InterpreterAssembler* assembler) {
typedef LoadWithVectorDescriptor Descriptor;
Callable ic = CodeFactory::KeyedLoadICInOptimizedCode(isolate_);
Node* code_target = __ HeapConstant(ic.code());
Node* reg_index = __ BytecodeOperandReg(0);
Node* object = __ LoadRegister(reg_index);
Node* name = __ GetAccumulator();
Node* raw_slot = __ BytecodeOperandIdx(1);
Node* smi_slot = __ SmiTag(raw_slot);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Node* context = __ GetContext();
Node* result = __ CallStub(
ic.descriptor(), code_target, context, Arg(Descriptor::kReceiver, object),
Arg(Descriptor::kName, name), Arg(Descriptor::kSlot, smi_slot),
Arg(Descriptor::kVector, type_feedback_vector));
__ SetAccumulator(result);
__ Dispatch();
}
void Interpreter::DoStoreIC(Callable ic, InterpreterAssembler* assembler) {
typedef StoreWithVectorDescriptor Descriptor;
Node* code_target = __ HeapConstant(ic.code());
Node* object_reg_index = __ BytecodeOperandReg(0);
Node* object = __ LoadRegister(object_reg_index);
Node* constant_index = __ BytecodeOperandIdx(1);
Node* name = __ LoadConstantPoolEntry(constant_index);
Node* value = __ GetAccumulator();
Node* raw_slot = __ BytecodeOperandIdx(2);
Node* smi_slot = __ SmiTag(raw_slot);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Node* context = __ GetContext();
__ CallStub(ic.descriptor(), code_target, context,
Arg(Descriptor::kReceiver, object), Arg(Descriptor::kName, name),
Arg(Descriptor::kValue, value), Arg(Descriptor::kSlot, smi_slot),
Arg(Descriptor::kVector, type_feedback_vector));
__ Dispatch();
}
// StaNamedPropertySloppy <object> <name_index> <slot>
//
// Calls the sloppy mode StoreIC at FeedBackVector slot <slot> for <object> and
// the name in constant pool entry <name_index> with the value in the
// accumulator.
void Interpreter::DoStaNamedPropertySloppy(InterpreterAssembler* assembler) {
Callable ic = CodeFactory::StoreICInOptimizedCode(isolate_, SLOPPY);
DoStoreIC(ic, assembler);
}
// StaNamedPropertyStrict <object> <name_index> <slot>
//
// Calls the strict mode StoreIC at FeedBackVector slot <slot> for <object> and
// the name in constant pool entry <name_index> with the value in the
// accumulator.
void Interpreter::DoStaNamedPropertyStrict(InterpreterAssembler* assembler) {
Callable ic = CodeFactory::StoreICInOptimizedCode(isolate_, STRICT);
DoStoreIC(ic, assembler);
}
void Interpreter::DoKeyedStoreIC(Callable ic, InterpreterAssembler* assembler) {
typedef StoreWithVectorDescriptor Descriptor;
Node* code_target = __ HeapConstant(ic.code());
Node* object_reg_index = __ BytecodeOperandReg(0);
Node* object = __ LoadRegister(object_reg_index);
Node* name_reg_index = __ BytecodeOperandReg(1);
Node* name = __ LoadRegister(name_reg_index);
Node* value = __ GetAccumulator();
Node* raw_slot = __ BytecodeOperandIdx(2);
Node* smi_slot = __ SmiTag(raw_slot);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Node* context = __ GetContext();
__ CallStub(ic.descriptor(), code_target, context,
Arg(Descriptor::kReceiver, object), Arg(Descriptor::kName, name),
Arg(Descriptor::kValue, value), Arg(Descriptor::kSlot, smi_slot),
Arg(Descriptor::kVector, type_feedback_vector));
__ Dispatch();
}
// StaKeyedPropertySloppy <object> <key> <slot>
//
// Calls the sloppy mode KeyStoreIC at FeedBackVector slot <slot> for <object>
// and the key <key> with the value in the accumulator.
void Interpreter::DoStaKeyedPropertySloppy(InterpreterAssembler* assembler) {
Callable ic = CodeFactory::KeyedStoreICInOptimizedCode(isolate_, SLOPPY);
DoKeyedStoreIC(ic, assembler);
}
// StaKeyedPropertyStrict <object> <key> <slot>
//
// Calls the strict mode KeyStoreIC at FeedBackVector slot <slot> for <object>
// and the key <key> with the value in the accumulator.
void Interpreter::DoStaKeyedPropertyStrict(InterpreterAssembler* assembler) {
Callable ic = CodeFactory::KeyedStoreICInOptimizedCode(isolate_, STRICT);
DoKeyedStoreIC(ic, assembler);
}
// LdaModuleVariable <cell_index> <depth>
//
// Load the contents of a module variable into the accumulator. The variable is
// identified by <cell_index>. <depth> is the depth of the current context
// relative to the module context.
void Interpreter::DoLdaModuleVariable(InterpreterAssembler* assembler) {
Node* cell_index = __ BytecodeOperandImm(0);
Node* depth = __ BytecodeOperandUImm(1);
Node* module_context = __ GetContextAtDepth(__ GetContext(), depth);
Node* module =
__ LoadContextElement(module_context, Context::EXTENSION_INDEX);
Label if_export(assembler), if_import(assembler), end(assembler);
__ Branch(__ IntPtrGreaterThan(cell_index, __ IntPtrConstant(0)), &if_export,
&if_import);
__ Bind(&if_export);
{
Node* regular_exports =
__ LoadObjectField(module, Module::kRegularExportsOffset);
// The actual array index is (cell_index - 1).
Node* export_index = __ IntPtrSub(cell_index, __ IntPtrConstant(1));
Node* cell = __ LoadFixedArrayElement(regular_exports, export_index);
__ SetAccumulator(__ LoadObjectField(cell, Cell::kValueOffset));
__ Goto(&end);
}
__ Bind(&if_import);
{
Node* regular_imports =
__ LoadObjectField(module, Module::kRegularImportsOffset);
// The actual array index is (-cell_index - 1).
Node* import_index = __ IntPtrSub(__ IntPtrConstant(-1), cell_index);
Node* cell = __ LoadFixedArrayElement(regular_imports, import_index);
__ SetAccumulator(__ LoadObjectField(cell, Cell::kValueOffset));
__ Goto(&end);
}
__ Bind(&end);
__ Dispatch();
}
// StaModuleVariable <cell_index> <depth>
//
// Store accumulator to the module variable identified by <cell_index>.
// <depth> is the depth of the current context relative to the module context.
void Interpreter::DoStaModuleVariable(InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* cell_index = __ BytecodeOperandImm(0);
Node* depth = __ BytecodeOperandUImm(1);
Node* module_context = __ GetContextAtDepth(__ GetContext(), depth);
Node* module =
__ LoadContextElement(module_context, Context::EXTENSION_INDEX);
Label if_export(assembler), if_import(assembler), end(assembler);
__ Branch(__ IntPtrGreaterThan(cell_index, __ IntPtrConstant(0)), &if_export,
&if_import);
__ Bind(&if_export);
{
Node* regular_exports =
__ LoadObjectField(module, Module::kRegularExportsOffset);
// The actual array index is (cell_index - 1).
Node* export_index = __ IntPtrSub(cell_index, __ IntPtrConstant(1));
Node* cell = __ LoadFixedArrayElement(regular_exports, export_index);
__ StoreObjectField(cell, Cell::kValueOffset, value);
__ Goto(&end);
}
__ Bind(&if_import);
{
// Not supported (probably never).
__ Abort(kUnsupportedModuleOperation);
__ Goto(&end);
}
__ Bind(&end);
__ Dispatch();
}
// PushContext <context>
//
// Saves the current context in <context>, and pushes the accumulator as the
// new current context.
void Interpreter::DoPushContext(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* new_context = __ GetAccumulator();
Node* old_context = __ GetContext();
__ StoreRegister(old_context, reg_index);
__ SetContext(new_context);
__ Dispatch();
}
// PopContext <context>
//
// Pops the current context and sets <context> as the new context.
void Interpreter::DoPopContext(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* context = __ LoadRegister(reg_index);
__ SetContext(context);
__ Dispatch();
}
// TODO(mythria): Remove this function once all CompareOps record type feedback.
void Interpreter::DoCompareOp(Token::Value compare_op,
InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* lhs = __ LoadRegister(reg_index);
Node* rhs = __ GetAccumulator();
Node* context = __ GetContext();
Node* result;
switch (compare_op) {
case Token::IN:
result = assembler->HasProperty(rhs, lhs, context);
break;
case Token::INSTANCEOF:
result = assembler->InstanceOf(lhs, rhs, context);
break;
default:
UNREACHABLE();
}
__ SetAccumulator(result);
__ Dispatch();
}
template <class Generator>
void Interpreter::DoBinaryOpWithFeedback(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* lhs = __ LoadRegister(reg_index);
Node* rhs = __ GetAccumulator();
Node* context = __ GetContext();
Node* slot_index = __ BytecodeOperandIdx(1);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Node* result = Generator::Generate(assembler, lhs, rhs, slot_index,
type_feedback_vector, context);
__ SetAccumulator(result);
__ Dispatch();
}
void Interpreter::DoCompareOpWithFeedback(Token::Value compare_op,
InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* lhs = __ LoadRegister(reg_index);
Node* rhs = __ GetAccumulator();
Node* context = __ GetContext();
Node* slot_index = __ BytecodeOperandIdx(1);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
// TODO(interpreter): the only reason this check is here is because we
// sometimes emit comparisons that shouldn't collect feedback (e.g.
// try-finally blocks and generators), and we could get rid of this by
// introducing Smi equality tests.
Label skip_feedback_update(assembler);
__ GotoIf(__ WordEqual(slot_index, __ IntPtrConstant(0)),
&skip_feedback_update);
Variable var_type_feedback(assembler, MachineRepresentation::kWord32);
Label lhs_is_smi(assembler), lhs_is_not_smi(assembler),
gather_rhs_type(assembler), do_compare(assembler);
__ Branch(__ TaggedIsSmi(lhs), &lhs_is_smi, &lhs_is_not_smi);
__ Bind(&lhs_is_smi);
var_type_feedback.Bind(
__ Int32Constant(CompareOperationFeedback::kSignedSmall));
__ Goto(&gather_rhs_type);
__ Bind(&lhs_is_not_smi);
{
Label lhs_is_number(assembler), lhs_is_not_number(assembler);
Node* lhs_map = __ LoadMap(lhs);
__ Branch(__ WordEqual(lhs_map, __ HeapNumberMapConstant()), &lhs_is_number,
&lhs_is_not_number);
__ Bind(&lhs_is_number);
var_type_feedback.Bind(__ Int32Constant(CompareOperationFeedback::kNumber));
__ Goto(&gather_rhs_type);
__ Bind(&lhs_is_not_number);
var_type_feedback.Bind(__ Int32Constant(CompareOperationFeedback::kAny));
__ Goto(&do_compare);
}
__ Bind(&gather_rhs_type);
{
Label rhs_is_smi(assembler);
__ GotoIf(__ TaggedIsSmi(rhs), &rhs_is_smi);
Node* rhs_map = __ LoadMap(rhs);
Node* rhs_type =
__ Select(__ WordEqual(rhs_map, __ HeapNumberMapConstant()),
__ Int32Constant(CompareOperationFeedback::kNumber),
__ Int32Constant(CompareOperationFeedback::kAny));
var_type_feedback.Bind(__ Word32Or(var_type_feedback.value(), rhs_type));
__ Goto(&do_compare);
__ Bind(&rhs_is_smi);
var_type_feedback.Bind(
__ Word32Or(var_type_feedback.value(),
__ Int32Constant(CompareOperationFeedback::kSignedSmall)));
__ Goto(&do_compare);
}
__ Bind(&do_compare);
__ UpdateFeedback(var_type_feedback.value(), type_feedback_vector,
slot_index);
__ Goto(&skip_feedback_update);
__ Bind(&skip_feedback_update);
Node* result;
switch (compare_op) {
case Token::EQ:
result = assembler->Equal(CodeStubAssembler::kDontNegateResult, lhs, rhs,
context);
break;
case Token::NE:
result =
assembler->Equal(CodeStubAssembler::kNegateResult, lhs, rhs, context);
break;
case Token::EQ_STRICT:
result = assembler->StrictEqual(CodeStubAssembler::kDontNegateResult, lhs,
rhs, context);
break;
case Token::LT:
result = assembler->RelationalComparison(CodeStubAssembler::kLessThan,
lhs, rhs, context);
break;
case Token::GT:
result = assembler->RelationalComparison(CodeStubAssembler::kGreaterThan,
lhs, rhs, context);
break;
case Token::LTE:
result = assembler->RelationalComparison(
CodeStubAssembler::kLessThanOrEqual, lhs, rhs, context);
break;
case Token::GTE:
result = assembler->RelationalComparison(
CodeStubAssembler::kGreaterThanOrEqual, lhs, rhs, context);
break;
default:
UNREACHABLE();
}
__ SetAccumulator(result);
__ Dispatch();
}
// Add <src>
//
// Add register <src> to accumulator.
void Interpreter::DoAdd(InterpreterAssembler* assembler) {
DoBinaryOpWithFeedback<AddWithFeedbackStub>(assembler);
}
// Sub <src>
//
// Subtract register <src> from accumulator.
void Interpreter::DoSub(InterpreterAssembler* assembler) {
DoBinaryOpWithFeedback<SubtractWithFeedbackStub>(assembler);
}
// Mul <src>
//
// Multiply accumulator by register <src>.
void Interpreter::DoMul(InterpreterAssembler* assembler) {
DoBinaryOpWithFeedback<MultiplyWithFeedbackStub>(assembler);
}
// Div <src>
//
// Divide register <src> by accumulator.
void Interpreter::DoDiv(InterpreterAssembler* assembler) {
DoBinaryOpWithFeedback<DivideWithFeedbackStub>(assembler);
}
// Mod <src>
//
// Modulo register <src> by accumulator.
void Interpreter::DoMod(InterpreterAssembler* assembler) {
DoBinaryOpWithFeedback<ModulusWithFeedbackStub>(assembler);
}
void Interpreter::DoBitwiseBinaryOp(Token::Value bitwise_op,
InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* lhs = __ LoadRegister(reg_index);
Node* rhs = __ GetAccumulator();
Node* context = __ GetContext();
Node* slot_index = __ BytecodeOperandIdx(1);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Variable var_lhs_type_feedback(assembler, MachineRepresentation::kWord32),
var_rhs_type_feedback(assembler, MachineRepresentation::kWord32);
Node* lhs_value = __ TruncateTaggedToWord32WithFeedback(
context, lhs, &var_lhs_type_feedback);
Node* rhs_value = __ TruncateTaggedToWord32WithFeedback(
context, rhs, &var_rhs_type_feedback);
Node* result = nullptr;
switch (bitwise_op) {
case Token::BIT_OR: {
Node* value = __ Word32Or(lhs_value, rhs_value);
result = __ ChangeInt32ToTagged(value);
} break;
case Token::BIT_AND: {
Node* value = __ Word32And(lhs_value, rhs_value);
result = __ ChangeInt32ToTagged(value);
} break;
case Token::BIT_XOR: {
Node* value = __ Word32Xor(lhs_value, rhs_value);
result = __ ChangeInt32ToTagged(value);
} break;
case Token::SHL: {
Node* value = __ Word32Shl(
lhs_value, __ Word32And(rhs_value, __ Int32Constant(0x1f)));
result = __ ChangeInt32ToTagged(value);
} break;
case Token::SHR: {
Node* value = __ Word32Shr(
lhs_value, __ Word32And(rhs_value, __ Int32Constant(0x1f)));
result = __ ChangeUint32ToTagged(value);
} break;
case Token::SAR: {
Node* value = __ Word32Sar(
lhs_value, __ Word32And(rhs_value, __ Int32Constant(0x1f)));
result = __ ChangeInt32ToTagged(value);
} break;
default:
UNREACHABLE();
}
Node* result_type =
__ Select(__ TaggedIsSmi(result),
__ Int32Constant(BinaryOperationFeedback::kSignedSmall),
__ Int32Constant(BinaryOperationFeedback::kNumber));
if (FLAG_debug_code) {
Label ok(assembler);
__ GotoIf(__ TaggedIsSmi(result), &ok);
Node* result_map = __ LoadMap(result);
__ AbortIfWordNotEqual(result_map, __ HeapNumberMapConstant(),
kExpectedHeapNumber);
__ Goto(&ok);
__ Bind(&ok);
}
Node* input_feedback =
__ Word32Or(var_lhs_type_feedback.value(), var_rhs_type_feedback.value());
__ UpdateFeedback(__ Word32Or(result_type, input_feedback),
type_feedback_vector, slot_index);
__ SetAccumulator(result);
__ Dispatch();
}
// BitwiseOr <src>
//
// BitwiseOr register <src> to accumulator.
void Interpreter::DoBitwiseOr(InterpreterAssembler* assembler) {
DoBitwiseBinaryOp(Token::BIT_OR, assembler);
}
// BitwiseXor <src>
//
// BitwiseXor register <src> to accumulator.
void Interpreter::DoBitwiseXor(InterpreterAssembler* assembler) {
DoBitwiseBinaryOp(Token::BIT_XOR, assembler);
}
// BitwiseAnd <src>
//
// BitwiseAnd register <src> to accumulator.
void Interpreter::DoBitwiseAnd(InterpreterAssembler* assembler) {
DoBitwiseBinaryOp(Token::BIT_AND, assembler);
}
// ShiftLeft <src>
//
// Left shifts register <src> by the count specified in the accumulator.
// Register <src> is converted to an int32 and the accumulator to uint32
// before the operation. 5 lsb bits from the accumulator are used as count
// i.e. <src> << (accumulator & 0x1F).
void Interpreter::DoShiftLeft(InterpreterAssembler* assembler) {
DoBitwiseBinaryOp(Token::SHL, assembler);
}
// ShiftRight <src>
//
// Right shifts register <src> by the count specified in the accumulator.
// Result is sign extended. Register <src> is converted to an int32 and the
// accumulator to uint32 before the operation. 5 lsb bits from the accumulator
// are used as count i.e. <src> >> (accumulator & 0x1F).
void Interpreter::DoShiftRight(InterpreterAssembler* assembler) {
DoBitwiseBinaryOp(Token::SAR, assembler);
}
// ShiftRightLogical <src>
//
// Right Shifts register <src> by the count specified in the accumulator.
// Result is zero-filled. The accumulator and register <src> are converted to
// uint32 before the operation 5 lsb bits from the accumulator are used as
// count i.e. <src> << (accumulator & 0x1F).
void Interpreter::DoShiftRightLogical(InterpreterAssembler* assembler) {
DoBitwiseBinaryOp(Token::SHR, assembler);
}
// AddSmi <imm> <reg>
//
// Adds an immediate value <imm> to register <reg>. For this
// operation <reg> is the lhs operand and <imm> is the <rhs> operand.
void Interpreter::DoAddSmi(InterpreterAssembler* assembler) {
Variable var_result(assembler, MachineRepresentation::kTagged);
Label fastpath(assembler), slowpath(assembler, Label::kDeferred),
end(assembler);
Node* reg_index = __ BytecodeOperandReg(1);
Node* left = __ LoadRegister(reg_index);
Node* raw_int = __ BytecodeOperandImm(0);
Node* right = __ SmiTag(raw_int);
Node* slot_index = __ BytecodeOperandIdx(2);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
// {right} is known to be a Smi.
// Check if the {left} is a Smi take the fast path.
__ Branch(__ TaggedIsSmi(left), &fastpath, &slowpath);
__ Bind(&fastpath);
{
// Try fast Smi addition first.
Node* pair = __ IntPtrAddWithOverflow(__ BitcastTaggedToWord(left),
__ BitcastTaggedToWord(right));
Node* overflow = __ Projection(1, pair);
// Check if the Smi additon overflowed.
Label if_notoverflow(assembler);
__ Branch(overflow, &slowpath, &if_notoverflow);
__ Bind(&if_notoverflow);
{
__ UpdateFeedback(__ Int32Constant(BinaryOperationFeedback::kSignedSmall),
type_feedback_vector, slot_index);
var_result.Bind(__ BitcastWordToTaggedSigned(__ Projection(0, pair)));
__ Goto(&end);
}
}
__ Bind(&slowpath);
{
Node* context = __ GetContext();
AddWithFeedbackStub stub(__ isolate());
Callable callable =
Callable(stub.GetCode(), AddWithFeedbackStub::Descriptor(__ isolate()));
Node* args[] = {left, right, slot_index, type_feedback_vector, context};
var_result.Bind(__ CallStubN(callable, args, 1));
__ Goto(&end);
}
__ Bind(&end);
{
__ SetAccumulator(var_result.value());
__ Dispatch();
}
}
// SubSmi <imm> <reg>
//
// Subtracts an immediate value <imm> to register <reg>. For this
// operation <reg> is the lhs operand and <imm> is the rhs operand.
void Interpreter::DoSubSmi(InterpreterAssembler* assembler) {
Variable var_result(assembler, MachineRepresentation::kTagged);
Label fastpath(assembler), slowpath(assembler, Label::kDeferred),
end(assembler);
Node* reg_index = __ BytecodeOperandReg(1);
Node* left = __ LoadRegister(reg_index);
Node* raw_int = __ BytecodeOperandImm(0);
Node* right = __ SmiTag(raw_int);
Node* slot_index = __ BytecodeOperandIdx(2);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
// {right} is known to be a Smi.
// Check if the {left} is a Smi take the fast path.
__ Branch(__ TaggedIsSmi(left), &fastpath, &slowpath);
__ Bind(&fastpath);
{
// Try fast Smi subtraction first.
Node* pair = __ IntPtrSubWithOverflow(__ BitcastTaggedToWord(left),
__ BitcastTaggedToWord(right));
Node* overflow = __ Projection(1, pair);
// Check if the Smi subtraction overflowed.
Label if_notoverflow(assembler);
__ Branch(overflow, &slowpath, &if_notoverflow);
__ Bind(&if_notoverflow);
{
__ UpdateFeedback(__ Int32Constant(BinaryOperationFeedback::kSignedSmall),
type_feedback_vector, slot_index);
var_result.Bind(__ BitcastWordToTaggedSigned(__ Projection(0, pair)));
__ Goto(&end);
}
}
__ Bind(&slowpath);
{
Node* context = __ GetContext();
SubtractWithFeedbackStub stub(__ isolate());
Callable callable = Callable(
stub.GetCode(), SubtractWithFeedbackStub::Descriptor(__ isolate()));
Node* args[] = {left, right, slot_index, type_feedback_vector, context};
var_result.Bind(__ CallStubN(callable, args, 1));
__ Goto(&end);
}
__ Bind(&end);
{
__ SetAccumulator(var_result.value());
__ Dispatch();
}
}
// BitwiseOr <imm> <reg>
//
// BitwiseOr <reg> with <imm>. For this operation <reg> is the lhs
// operand and <imm> is the rhs operand.
void Interpreter::DoBitwiseOrSmi(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(1);
Node* left = __ LoadRegister(reg_index);
Node* raw_int = __ BytecodeOperandImm(0);
Node* right = __ SmiTag(raw_int);
Node* context = __ GetContext();
Node* slot_index = __ BytecodeOperandIdx(2);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Variable var_lhs_type_feedback(assembler, MachineRepresentation::kWord32);
Node* lhs_value = __ TruncateTaggedToWord32WithFeedback(
context, left, &var_lhs_type_feedback);
Node* rhs_value = __ SmiToWord32(right);
Node* value = __ Word32Or(lhs_value, rhs_value);
Node* result = __ ChangeInt32ToTagged(value);
Node* result_type =
__ Select(__ TaggedIsSmi(result),
__ Int32Constant(BinaryOperationFeedback::kSignedSmall),
__ Int32Constant(BinaryOperationFeedback::kNumber));
__ UpdateFeedback(__ Word32Or(result_type, var_lhs_type_feedback.value()),
type_feedback_vector, slot_index);
__ SetAccumulator(result);
__ Dispatch();
}
// BitwiseAnd <imm> <reg>
//
// BitwiseAnd <reg> with <imm>. For this operation <reg> is the lhs
// operand and <imm> is the rhs operand.
void Interpreter::DoBitwiseAndSmi(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(1);
Node* left = __ LoadRegister(reg_index);
Node* raw_int = __ BytecodeOperandImm(0);
Node* right = __ SmiTag(raw_int);
Node* context = __ GetContext();
Node* slot_index = __ BytecodeOperandIdx(2);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Variable var_lhs_type_feedback(assembler, MachineRepresentation::kWord32);
Node* lhs_value = __ TruncateTaggedToWord32WithFeedback(
context, left, &var_lhs_type_feedback);
Node* rhs_value = __ SmiToWord32(right);
Node* value = __ Word32And(lhs_value, rhs_value);
Node* result = __ ChangeInt32ToTagged(value);
Node* result_type =
__ Select(__ TaggedIsSmi(result),
__ Int32Constant(BinaryOperationFeedback::kSignedSmall),
__ Int32Constant(BinaryOperationFeedback::kNumber));
__ UpdateFeedback(__ Word32Or(result_type, var_lhs_type_feedback.value()),
type_feedback_vector, slot_index);
__ SetAccumulator(result);
__ Dispatch();
}
// ShiftLeftSmi <imm> <reg>
//
// Left shifts register <src> by the count specified in <imm>.
// Register <src> is converted to an int32 before the operation. The 5
// lsb bits from <imm> are used as count i.e. <src> << (<imm> & 0x1F).
void Interpreter::DoShiftLeftSmi(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(1);
Node* left = __ LoadRegister(reg_index);
Node* raw_int = __ BytecodeOperandImm(0);
Node* right = __ SmiTag(raw_int);
Node* context = __ GetContext();
Node* slot_index = __ BytecodeOperandIdx(2);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Variable var_lhs_type_feedback(assembler, MachineRepresentation::kWord32);
Node* lhs_value = __ TruncateTaggedToWord32WithFeedback(
context, left, &var_lhs_type_feedback);
Node* rhs_value = __ SmiToWord32(right);
Node* shift_count = __ Word32And(rhs_value, __ Int32Constant(0x1f));
Node* value = __ Word32Shl(lhs_value, shift_count);
Node* result = __ ChangeInt32ToTagged(value);
Node* result_type =
__ Select(__ TaggedIsSmi(result),
__ Int32Constant(BinaryOperationFeedback::kSignedSmall),
__ Int32Constant(BinaryOperationFeedback::kNumber));
__ UpdateFeedback(__ Word32Or(result_type, var_lhs_type_feedback.value()),
type_feedback_vector, slot_index);
__ SetAccumulator(result);
__ Dispatch();
}
// ShiftRightSmi <imm> <reg>
//
// Right shifts register <src> by the count specified in <imm>.
// Register <src> is converted to an int32 before the operation. The 5
// lsb bits from <imm> are used as count i.e. <src> << (<imm> & 0x1F).
void Interpreter::DoShiftRightSmi(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(1);
Node* left = __ LoadRegister(reg_index);
Node* raw_int = __ BytecodeOperandImm(0);
Node* right = __ SmiTag(raw_int);
Node* context = __ GetContext();
Node* slot_index = __ BytecodeOperandIdx(2);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Variable var_lhs_type_feedback(assembler, MachineRepresentation::kWord32);
Node* lhs_value = __ TruncateTaggedToWord32WithFeedback(
context, left, &var_lhs_type_feedback);
Node* rhs_value = __ SmiToWord32(right);
Node* shift_count = __ Word32And(rhs_value, __ Int32Constant(0x1f));
Node* value = __ Word32Sar(lhs_value, shift_count);
Node* result = __ ChangeInt32ToTagged(value);
Node* result_type =
__ Select(__ TaggedIsSmi(result),
__ Int32Constant(BinaryOperationFeedback::kSignedSmall),
__ Int32Constant(BinaryOperationFeedback::kNumber));
__ UpdateFeedback(__ Word32Or(result_type, var_lhs_type_feedback.value()),
type_feedback_vector, slot_index);
__ SetAccumulator(result);
__ Dispatch();
}
Node* Interpreter::BuildUnaryOp(Callable callable,
InterpreterAssembler* assembler) {
Node* target = __ HeapConstant(callable.code());
Node* accumulator = __ GetAccumulator();
Node* context = __ GetContext();
return __ CallStub(callable.descriptor(), target, context, accumulator);
}
template <class Generator>
void Interpreter::DoUnaryOpWithFeedback(InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* context = __ GetContext();
Node* slot_index = __ BytecodeOperandIdx(0);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Node* result = Generator::Generate(assembler, value, context,
type_feedback_vector, slot_index);
__ SetAccumulator(result);
__ Dispatch();
}
// ToName
//
// Convert the object referenced by the accumulator to a name.
void Interpreter::DoToName(InterpreterAssembler* assembler) {
Node* object = __ GetAccumulator();
Node* context = __ GetContext();
Node* result = __ ToName(context, object);
__ StoreRegister(result, __ BytecodeOperandReg(0));
__ Dispatch();
}
// ToNumber
//
// Convert the object referenced by the accumulator to a number.
void Interpreter::DoToNumber(InterpreterAssembler* assembler) {
Node* object = __ GetAccumulator();
Node* context = __ GetContext();
Node* result = __ ToNumber(context, object);
__ StoreRegister(result, __ BytecodeOperandReg(0));
__ Dispatch();
}
// ToObject
//
// Convert the object referenced by the accumulator to a JSReceiver.
void Interpreter::DoToObject(InterpreterAssembler* assembler) {
Node* result = BuildUnaryOp(CodeFactory::ToObject(isolate_), assembler);
__ StoreRegister(result, __ BytecodeOperandReg(0));
__ Dispatch();
}
// Inc
//
// Increments value in the accumulator by one.
void Interpreter::DoInc(InterpreterAssembler* assembler) {
DoUnaryOpWithFeedback<IncStub>(assembler);
}
// Dec
//
// Decrements value in the accumulator by one.
void Interpreter::DoDec(InterpreterAssembler* assembler) {
DoUnaryOpWithFeedback<DecStub>(assembler);
}
// LogicalNot
//
// Perform logical-not on the accumulator, first casting the
// accumulator to a boolean value if required.
// ToBooleanLogicalNot
void Interpreter::DoToBooleanLogicalNot(InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Variable result(assembler, MachineRepresentation::kTagged);
Label if_true(assembler), if_false(assembler), end(assembler);
Node* true_value = __ BooleanConstant(true);
Node* false_value = __ BooleanConstant(false);
__ BranchIfToBooleanIsTrue(value, &if_true, &if_false);
__ Bind(&if_true);
{
result.Bind(false_value);
__ Goto(&end);
}
__ Bind(&if_false);
{
result.Bind(true_value);
__ Goto(&end);
}
__ Bind(&end);
__ SetAccumulator(result.value());
__ Dispatch();
}
// LogicalNot
//
// Perform logical-not on the accumulator, which must already be a boolean
// value.
void Interpreter::DoLogicalNot(InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Variable result(assembler, MachineRepresentation::kTagged);
Label if_true(assembler), if_false(assembler), end(assembler);
Node* true_value = __ BooleanConstant(true);
Node* false_value = __ BooleanConstant(false);
__ Branch(__ WordEqual(value, true_value), &if_true, &if_false);
__ Bind(&if_true);
{
result.Bind(false_value);
__ Goto(&end);
}
__ Bind(&if_false);
{
if (FLAG_debug_code) {
__ AbortIfWordNotEqual(value, false_value,
BailoutReason::kExpectedBooleanValue);
}
result.Bind(true_value);
__ Goto(&end);
}
__ Bind(&end);
__ SetAccumulator(result.value());
__ Dispatch();
}
// TypeOf
//
// Load the accumulator with the string representating type of the
// object in the accumulator.
void Interpreter::DoTypeOf(InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* context = __ GetContext();
Node* result = assembler->Typeof(value, context);
__ SetAccumulator(result);
__ Dispatch();
}
void Interpreter::DoDelete(Runtime::FunctionId function_id,
InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* object = __ LoadRegister(reg_index);
Node* key = __ GetAccumulator();
Node* context = __ GetContext();
Node* result = __ CallRuntime(function_id, context, object, key);
__ SetAccumulator(result);
__ Dispatch();
}
// DeletePropertyStrict
//
// Delete the property specified in the accumulator from the object
// referenced by the register operand following strict mode semantics.
void Interpreter::DoDeletePropertyStrict(InterpreterAssembler* assembler) {
DoDelete(Runtime::kDeleteProperty_Strict, assembler);
}
// DeletePropertySloppy
//
// Delete the property specified in the accumulator from the object
// referenced by the register operand following sloppy mode semantics.
void Interpreter::DoDeletePropertySloppy(InterpreterAssembler* assembler) {
DoDelete(Runtime::kDeleteProperty_Sloppy, assembler);
}
void Interpreter::DoJSCall(InterpreterAssembler* assembler,
TailCallMode tail_call_mode) {
Node* function_reg = __ BytecodeOperandReg(0);
Node* function = __ LoadRegister(function_reg);
Node* receiver_reg = __ BytecodeOperandReg(1);
Node* receiver_arg = __ RegisterLocation(receiver_reg);
Node* receiver_args_count = __ BytecodeOperandCount(2);
Node* receiver_count = __ Int32Constant(1);
Node* args_count = __ Int32Sub(receiver_args_count, receiver_count);
Node* slot_id = __ BytecodeOperandIdx(3);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Node* context = __ GetContext();
Node* result =
__ CallJSWithFeedback(function, context, receiver_arg, args_count,
slot_id, type_feedback_vector, tail_call_mode);
__ SetAccumulator(result);
__ Dispatch();
}
// Call <callable> <receiver> <arg_count> <feedback_slot_id>
//
// Call a JSfunction or Callable in |callable| with the |receiver| and
// |arg_count| arguments in subsequent registers. Collect type feedback
// into |feedback_slot_id|
void Interpreter::DoCall(InterpreterAssembler* assembler) {
DoJSCall(assembler, TailCallMode::kDisallow);
}
// CallProperty <callable> <receiver> <arg_count> <feedback_slot_id>
//
// Call a JSfunction or Callable in |callable| with the |receiver| and
// |arg_count| arguments in subsequent registers. Collect type feedback into
// |feedback_slot_id|. The callable is known to be a property of the receiver.
void Interpreter::DoCallProperty(InterpreterAssembler* assembler) {
// TODO(leszeks): Look into making the interpreter use the fact that the
// receiver is non-null.
DoJSCall(assembler, TailCallMode::kDisallow);
}
// TailCall <callable> <receiver> <arg_count> <feedback_slot_id>
//
// Tail call a JSfunction or Callable in |callable| with the |receiver| and
// |arg_count| arguments in subsequent registers. Collect type feedback
// into |feedback_slot_id|
void Interpreter::DoTailCall(InterpreterAssembler* assembler) {
DoJSCall(assembler, TailCallMode::kAllow);
}
// CallRuntime <function_id> <first_arg> <arg_count>
//
// Call the runtime function |function_id| with the first argument in
// register |first_arg| and |arg_count| arguments in subsequent
// registers.
void Interpreter::DoCallRuntime(InterpreterAssembler* assembler) {
Node* function_id = __ BytecodeOperandRuntimeId(0);
Node* first_arg_reg = __ BytecodeOperandReg(1);
Node* first_arg = __ RegisterLocation(first_arg_reg);
Node* args_count = __ BytecodeOperandCount(2);
Node* context = __ GetContext();
Node* result = __ CallRuntimeN(function_id, context, first_arg, args_count);
__ SetAccumulator(result);
__ Dispatch();
}
// InvokeIntrinsic <function_id> <first_arg> <arg_count>
//
// Implements the semantic equivalent of calling the runtime function
// |function_id| with the first argument in |first_arg| and |arg_count|
// arguments in subsequent registers.
void Interpreter::DoInvokeIntrinsic(InterpreterAssembler* assembler) {
Node* function_id = __ BytecodeOperandIntrinsicId(0);
Node* first_arg_reg = __ BytecodeOperandReg(1);
Node* arg_count = __ BytecodeOperandCount(2);
Node* context = __ GetContext();
IntrinsicsHelper helper(assembler);
Node* result =
helper.InvokeIntrinsic(function_id, context, first_arg_reg, arg_count);
__ SetAccumulator(result);
__ Dispatch();
}
// CallRuntimeForPair <function_id> <first_arg> <arg_count> <first_return>
//
// Call the runtime function |function_id| which returns a pair, with the
// first argument in register |first_arg| and |arg_count| arguments in
// subsequent registers. Returns the result in <first_return> and
// <first_return + 1>
void Interpreter::DoCallRuntimeForPair(InterpreterAssembler* assembler) {
// Call the runtime function.
Node* function_id = __ BytecodeOperandRuntimeId(0);
Node* first_arg_reg = __ BytecodeOperandReg(1);
Node* first_arg = __ RegisterLocation(first_arg_reg);
Node* args_count = __ BytecodeOperandCount(2);
Node* context = __ GetContext();
Node* result_pair =
__ CallRuntimeN(function_id, context, first_arg, args_count, 2);
// Store the results in <first_return> and <first_return + 1>
Node* first_return_reg = __ BytecodeOperandReg(3);
Node* second_return_reg = __ NextRegister(first_return_reg);
Node* result0 = __ Projection(0, result_pair);
Node* result1 = __ Projection(1, result_pair);
__ StoreRegister(result0, first_return_reg);
__ StoreRegister(result1, second_return_reg);
__ Dispatch();
}
// CallJSRuntime <context_index> <receiver> <arg_count>
//
// Call the JS runtime function that has the |context_index| with the receiver
// in register |receiver| and |arg_count| arguments in subsequent registers.
void Interpreter::DoCallJSRuntime(InterpreterAssembler* assembler) {
Node* context_index = __ BytecodeOperandIdx(0);
Node* receiver_reg = __ BytecodeOperandReg(1);
Node* first_arg = __ RegisterLocation(receiver_reg);
Node* receiver_args_count = __ BytecodeOperandCount(2);
Node* receiver_count = __ Int32Constant(1);
Node* args_count = __ Int32Sub(receiver_args_count, receiver_count);
// Get the function to call from the native context.
Node* context = __ GetContext();
Node* native_context = __ LoadNativeContext(context);
Node* function = __ LoadContextElement(native_context, context_index);
// Call the function.
Node* result = __ CallJS(function, context, first_arg, args_count,
TailCallMode::kDisallow);
__ SetAccumulator(result);
__ Dispatch();
}
// New <constructor> <first_arg> <arg_count>
//
// Call operator new with |constructor| and the first argument in
// register |first_arg| and |arg_count| arguments in subsequent
// registers. The new.target is in the accumulator.
//
void Interpreter::DoNew(InterpreterAssembler* assembler) {
Callable ic = CodeFactory::InterpreterPushArgsAndConstruct(isolate_);
Node* new_target = __ GetAccumulator();
Node* constructor_reg = __ BytecodeOperandReg(0);
Node* constructor = __ LoadRegister(constructor_reg);
Node* first_arg_reg = __ BytecodeOperandReg(1);
Node* first_arg = __ RegisterLocation(first_arg_reg);
Node* args_count = __ BytecodeOperandCount(2);
Node* slot_id = __ BytecodeOperandIdx(3);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Node* context = __ GetContext();
Node* result = __ CallConstruct(constructor, context, new_target, first_arg,
args_count, slot_id, type_feedback_vector);
__ SetAccumulator(result);
__ Dispatch();
}
// TestEqual <src>
//
// Test if the value in the <src> register equals the accumulator.
void Interpreter::DoTestEqual(InterpreterAssembler* assembler) {
DoCompareOpWithFeedback(Token::Value::EQ, assembler);
}
// TestNotEqual <src>
//
// Test if the value in the <src> register is not equal to the accumulator.
void Interpreter::DoTestNotEqual(InterpreterAssembler* assembler) {
DoCompareOpWithFeedback(Token::Value::NE, assembler);
}
// TestEqualStrict <src>
//
// Test if the value in the <src> register is strictly equal to the accumulator.
void Interpreter::DoTestEqualStrict(InterpreterAssembler* assembler) {
DoCompareOpWithFeedback(Token::Value::EQ_STRICT, assembler);
}
// TestLessThan <src>
//
// Test if the value in the <src> register is less than the accumulator.
void Interpreter::DoTestLessThan(InterpreterAssembler* assembler) {
DoCompareOpWithFeedback(Token::Value::LT, assembler);
}
// TestGreaterThan <src>
//
// Test if the value in the <src> register is greater than the accumulator.
void Interpreter::DoTestGreaterThan(InterpreterAssembler* assembler) {
DoCompareOpWithFeedback(Token::Value::GT, assembler);
}
// TestLessThanOrEqual <src>
//
// Test if the value in the <src> register is less than or equal to the
// accumulator.
void Interpreter::DoTestLessThanOrEqual(InterpreterAssembler* assembler) {
DoCompareOpWithFeedback(Token::Value::LTE, assembler);
}
// TestGreaterThanOrEqual <src>
//
// Test if the value in the <src> register is greater than or equal to the
// accumulator.
void Interpreter::DoTestGreaterThanOrEqual(InterpreterAssembler* assembler) {
DoCompareOpWithFeedback(Token::Value::GTE, assembler);
}
// TestIn <src>
//
// Test if the object referenced by the register operand is a property of the
// object referenced by the accumulator.
void Interpreter::DoTestIn(InterpreterAssembler* assembler) {
DoCompareOp(Token::IN, assembler);
}
// TestInstanceOf <src>
//
// Test if the object referenced by the <src> register is an an instance of type
// referenced by the accumulator.
void Interpreter::DoTestInstanceOf(InterpreterAssembler* assembler) {
DoCompareOp(Token::INSTANCEOF, assembler);
}
// Jump <imm>
//
// Jump by number of bytes represented by the immediate operand |imm|.
void Interpreter::DoJump(InterpreterAssembler* assembler) {
Node* relative_jump = __ BytecodeOperandImm(0);
__ Jump(relative_jump);
}
// JumpConstant <idx>
//
// Jump by number of bytes in the Smi in the |idx| entry in the constant pool.
void Interpreter::DoJumpConstant(InterpreterAssembler* assembler) {
Node* index = __ BytecodeOperandIdx(0);
Node* relative_jump = __ LoadAndUntagConstantPoolEntry(index);
__ Jump(relative_jump);
}
// JumpIfTrue <imm>
//
// Jump by number of bytes represented by an immediate operand if the
// accumulator contains true.
void Interpreter::DoJumpIfTrue(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* relative_jump = __ BytecodeOperandImm(0);
Node* true_value = __ BooleanConstant(true);
__ JumpIfWordEqual(accumulator, true_value, relative_jump);
}
// JumpIfTrueConstant <idx>
//
// Jump by number of bytes in the Smi in the |idx| entry in the constant pool
// if the accumulator contains true.
void Interpreter::DoJumpIfTrueConstant(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* index = __ BytecodeOperandIdx(0);
Node* relative_jump = __ LoadAndUntagConstantPoolEntry(index);
Node* true_value = __ BooleanConstant(true);
__ JumpIfWordEqual(accumulator, true_value, relative_jump);
}
// JumpIfFalse <imm>
//
// Jump by number of bytes represented by an immediate operand if the
// accumulator contains false.
void Interpreter::DoJumpIfFalse(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* relative_jump = __ BytecodeOperandImm(0);
Node* false_value = __ BooleanConstant(false);
__ JumpIfWordEqual(accumulator, false_value, relative_jump);
}
// JumpIfFalseConstant <idx>
//
// Jump by number of bytes in the Smi in the |idx| entry in the constant pool
// if the accumulator contains false.
void Interpreter::DoJumpIfFalseConstant(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* index = __ BytecodeOperandIdx(0);
Node* relative_jump = __ LoadAndUntagConstantPoolEntry(index);
Node* false_value = __ BooleanConstant(false);
__ JumpIfWordEqual(accumulator, false_value, relative_jump);
}
// JumpIfToBooleanTrue <imm>
//
// Jump by number of bytes represented by an immediate operand if the object
// referenced by the accumulator is true when the object is cast to boolean.
void Interpreter::DoJumpIfToBooleanTrue(InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* relative_jump = __ BytecodeOperandImm(0);
Label if_true(assembler), if_false(assembler);
__ BranchIfToBooleanIsTrue(value, &if_true, &if_false);
__ Bind(&if_true);
__ Jump(relative_jump);
__ Bind(&if_false);
__ Dispatch();
}
// JumpIfToBooleanTrueConstant <idx>
//
// Jump by number of bytes in the Smi in the |idx| entry in the constant pool
// if the object referenced by the accumulator is true when the object is cast
// to boolean.
void Interpreter::DoJumpIfToBooleanTrueConstant(
InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* index = __ BytecodeOperandIdx(0);
Node* relative_jump = __ LoadAndUntagConstantPoolEntry(index);
Label if_true(assembler), if_false(assembler);
__ BranchIfToBooleanIsTrue(value, &if_true, &if_false);
__ Bind(&if_true);
__ Jump(relative_jump);
__ Bind(&if_false);
__ Dispatch();
}
// JumpIfToBooleanFalse <imm>
//
// Jump by number of bytes represented by an immediate operand if the object
// referenced by the accumulator is false when the object is cast to boolean.
void Interpreter::DoJumpIfToBooleanFalse(InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* relative_jump = __ BytecodeOperandImm(0);
Label if_true(assembler), if_false(assembler);
__ BranchIfToBooleanIsTrue(value, &if_true, &if_false);
__ Bind(&if_true);
__ Dispatch();
__ Bind(&if_false);
__ Jump(relative_jump);
}
// JumpIfToBooleanFalseConstant <idx>
//
// Jump by number of bytes in the Smi in the |idx| entry in the constant pool
// if the object referenced by the accumulator is false when the object is cast
// to boolean.
void Interpreter::DoJumpIfToBooleanFalseConstant(
InterpreterAssembler* assembler) {
Node* value = __ GetAccumulator();
Node* index = __ BytecodeOperandIdx(0);
Node* relative_jump = __ LoadAndUntagConstantPoolEntry(index);
Label if_true(assembler), if_false(assembler);
__ BranchIfToBooleanIsTrue(value, &if_true, &if_false);
__ Bind(&if_true);
__ Dispatch();
__ Bind(&if_false);
__ Jump(relative_jump);
}
// JumpIfNull <imm>
//
// Jump by number of bytes represented by an immediate operand if the object
// referenced by the accumulator is the null constant.
void Interpreter::DoJumpIfNull(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* null_value = __ HeapConstant(isolate_->factory()->null_value());
Node* relative_jump = __ BytecodeOperandImm(0);
__ JumpIfWordEqual(accumulator, null_value, relative_jump);
}
// JumpIfNullConstant <idx>
//
// Jump by number of bytes in the Smi in the |idx| entry in the constant pool
// if the object referenced by the accumulator is the null constant.
void Interpreter::DoJumpIfNullConstant(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* null_value = __ HeapConstant(isolate_->factory()->null_value());
Node* index = __ BytecodeOperandIdx(0);
Node* relative_jump = __ LoadAndUntagConstantPoolEntry(index);
__ JumpIfWordEqual(accumulator, null_value, relative_jump);
}
// JumpIfUndefined <imm>
//
// Jump by number of bytes represented by an immediate operand if the object
// referenced by the accumulator is the undefined constant.
void Interpreter::DoJumpIfUndefined(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* undefined_value =
__ HeapConstant(isolate_->factory()->undefined_value());
Node* relative_jump = __ BytecodeOperandImm(0);
__ JumpIfWordEqual(accumulator, undefined_value, relative_jump);
}
// JumpIfUndefinedConstant <idx>
//
// Jump by number of bytes in the Smi in the |idx| entry in the constant pool
// if the object referenced by the accumulator is the undefined constant.
void Interpreter::DoJumpIfUndefinedConstant(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* undefined_value =
__ HeapConstant(isolate_->factory()->undefined_value());
Node* index = __ BytecodeOperandIdx(0);
Node* relative_jump = __ LoadAndUntagConstantPoolEntry(index);
__ JumpIfWordEqual(accumulator, undefined_value, relative_jump);
}
// JumpIfNotHole <imm>
//
// Jump by number of bytes represented by an immediate operand if the object
// referenced by the accumulator is the hole.
void Interpreter::DoJumpIfNotHole(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* the_hole_value = __ HeapConstant(isolate_->factory()->the_hole_value());
Node* relative_jump = __ BytecodeOperandImm(0);
__ JumpIfWordNotEqual(accumulator, the_hole_value, relative_jump);
}
// JumpIfNotHoleConstant <idx>
//
// Jump by number of bytes in the Smi in the |idx| entry in the constant pool
// if the object referenced by the accumulator is the hole constant.
void Interpreter::DoJumpIfNotHoleConstant(InterpreterAssembler* assembler) {
Node* accumulator = __ GetAccumulator();
Node* the_hole_value = __ HeapConstant(isolate_->factory()->the_hole_value());
Node* index = __ BytecodeOperandIdx(0);
Node* relative_jump = __ LoadAndUntagConstantPoolEntry(index);
__ JumpIfWordNotEqual(accumulator, the_hole_value, relative_jump);
}
// JumpLoop <imm> <loop_depth>
//
// Jump by number of bytes represented by the immediate operand |imm|. Also
// performs a loop nesting check and potentially triggers OSR in case the
// current OSR level matches (or exceeds) the specified |loop_depth|.
void Interpreter::DoJumpLoop(InterpreterAssembler* assembler) {
Node* relative_jump = __ BytecodeOperandImm(0);
Node* loop_depth = __ BytecodeOperandImm(1);
Node* osr_level = __ LoadOSRNestingLevel();
// Check if OSR points at the given {loop_depth} are armed by comparing it to
// the current {osr_level} loaded from the header of the BytecodeArray.
Label ok(assembler), osr_armed(assembler, Label::kDeferred);
Node* condition = __ Int32GreaterThanOrEqual(loop_depth, osr_level);
__ Branch(condition, &ok, &osr_armed);
__ Bind(&ok);
__ Jump(relative_jump);
__ Bind(&osr_armed);
{
Callable callable = CodeFactory::InterpreterOnStackReplacement(isolate_);
Node* target = __ HeapConstant(callable.code());
Node* context = __ GetContext();
__ CallStub(callable.descriptor(), target, context);
__ Jump(relative_jump);
}
}
// CreateRegExpLiteral <pattern_idx> <literal_idx> <flags>
//
// Creates a regular expression literal for literal index <literal_idx> with
// <flags> and the pattern in <pattern_idx>.
void Interpreter::DoCreateRegExpLiteral(InterpreterAssembler* assembler) {
Node* index = __ BytecodeOperandIdx(0);
Node* pattern = __ LoadConstantPoolEntry(index);
Node* literal_index_raw = __ BytecodeOperandIdx(1);
Node* literal_index = __ SmiTag(literal_index_raw);
Node* flags_raw = __ BytecodeOperandFlag(2);
Node* flags = __ SmiTag(flags_raw);
Node* closure = __ LoadRegister(Register::function_closure());
Node* context = __ GetContext();
Node* result = FastCloneRegExpStub::Generate(
assembler, closure, literal_index, pattern, flags, context);
__ SetAccumulator(result);
__ Dispatch();
}
// CreateArrayLiteral <element_idx> <literal_idx> <flags>
//
// Creates an array literal for literal index <literal_idx> with
// CreateArrayLiteral flags <flags> and constant elements in <element_idx>.
void Interpreter::DoCreateArrayLiteral(InterpreterAssembler* assembler) {
Node* literal_index_raw = __ BytecodeOperandIdx(1);
Node* literal_index = __ SmiTag(literal_index_raw);
Node* closure = __ LoadRegister(Register::function_closure());
Node* context = __ GetContext();
Node* bytecode_flags = __ BytecodeOperandFlag(2);
Label fast_shallow_clone(assembler),
call_runtime(assembler, Label::kDeferred);
Node* use_fast_shallow_clone = __ Word32And(
bytecode_flags,
__ Int32Constant(CreateArrayLiteralFlags::FastShallowCloneBit::kMask));
__ Branch(use_fast_shallow_clone, &fast_shallow_clone, &call_runtime);
__ Bind(&fast_shallow_clone);
{
DCHECK(FLAG_allocation_site_pretenuring);
Node* result = FastCloneShallowArrayStub::Generate(
assembler, closure, literal_index, context, &call_runtime,
TRACK_ALLOCATION_SITE);
__ SetAccumulator(result);
__ Dispatch();
}
__ Bind(&call_runtime);
{
STATIC_ASSERT(CreateArrayLiteralFlags::FlagsBits::kShift == 0);
Node* flags_raw = __ Word32And(
bytecode_flags,
__ Int32Constant(CreateArrayLiteralFlags::FlagsBits::kMask));
Node* flags = __ SmiTag(flags_raw);
Node* index = __ BytecodeOperandIdx(0);
Node* constant_elements = __ LoadConstantPoolEntry(index);
Node* result =
__ CallRuntime(Runtime::kCreateArrayLiteral, context, closure,
literal_index, constant_elements, flags);
__ SetAccumulator(result);
__ Dispatch();
}
}
// CreateObjectLiteral <element_idx> <literal_idx> <flags>
//
// Creates an object literal for literal index <literal_idx> with
// CreateObjectLiteralFlags <flags> and constant elements in <element_idx>.
void Interpreter::DoCreateObjectLiteral(InterpreterAssembler* assembler) {
Node* literal_index_raw = __ BytecodeOperandIdx(1);
Node* literal_index = __ SmiTag(literal_index_raw);
Node* bytecode_flags = __ BytecodeOperandFlag(2);
Node* closure = __ LoadRegister(Register::function_closure());
// Check if we can do a fast clone or have to call the runtime.
Label if_fast_clone(assembler),
if_not_fast_clone(assembler, Label::kDeferred);
Node* fast_clone_properties_count =
__ DecodeWord32<CreateObjectLiteralFlags::FastClonePropertiesCountBits>(
bytecode_flags);
__ Branch(fast_clone_properties_count, &if_fast_clone, &if_not_fast_clone);
__ Bind(&if_fast_clone);
{
// If we can do a fast clone do the fast-path in FastCloneShallowObjectStub.
Node* result = FastCloneShallowObjectStub::GenerateFastPath(
assembler, &if_not_fast_clone, closure, literal_index,
fast_clone_properties_count);
__ StoreRegister(result, __ BytecodeOperandReg(3));
__ Dispatch();
}
__ Bind(&if_not_fast_clone);
{
// If we can't do a fast clone, call into the runtime.
Node* index = __ BytecodeOperandIdx(0);
Node* constant_elements = __ LoadConstantPoolEntry(index);
Node* context = __ GetContext();
STATIC_ASSERT(CreateObjectLiteralFlags::FlagsBits::kShift == 0);
Node* flags_raw = __ Word32And(
bytecode_flags,
__ Int32Constant(CreateObjectLiteralFlags::FlagsBits::kMask));
Node* flags = __ SmiTag(flags_raw);
Node* result =
__ CallRuntime(Runtime::kCreateObjectLiteral, context, closure,
literal_index, constant_elements, flags);
__ StoreRegister(result, __ BytecodeOperandReg(3));
// TODO(klaasb) build a single dispatch once the call is inlined
__ Dispatch();
}
}
// CreateClosure <index> <tenured>
//
// Creates a new closure for SharedFunctionInfo at position |index| in the
// constant pool and with the PretenureFlag <tenured>.
void Interpreter::DoCreateClosure(InterpreterAssembler* assembler) {
Node* index = __ BytecodeOperandIdx(0);
Node* shared = __ LoadConstantPoolEntry(index);
Node* flags = __ BytecodeOperandFlag(1);
Node* context = __ GetContext();
Label call_runtime(assembler, Label::kDeferred);
Node* fast_new_closure = __ Word32And(
flags, __ Int32Constant(CreateClosureFlags::FastNewClosureBit::kMask));
__ GotoUnless(fast_new_closure, &call_runtime);
__ SetAccumulator(FastNewClosureStub::Generate(assembler, shared, context));
__ Dispatch();
__ Bind(&call_runtime);
{
STATIC_ASSERT(CreateClosureFlags::PretenuredBit::kShift == 0);
Node* tenured_raw = __ Word32And(
flags, __ Int32Constant(CreateClosureFlags::PretenuredBit::kMask));
Node* tenured = __ SmiTag(tenured_raw);
Node* result = __ CallRuntime(Runtime::kInterpreterNewClosure, context,
shared, tenured);
__ SetAccumulator(result);
__ Dispatch();
}
}
// CreateBlockContext <index>
//
// Creates a new block context with the scope info constant at |index| and the
// closure in the accumulator.
void Interpreter::DoCreateBlockContext(InterpreterAssembler* assembler) {
Node* index = __ BytecodeOperandIdx(0);
Node* scope_info = __ LoadConstantPoolEntry(index);
Node* closure = __ GetAccumulator();
Node* context = __ GetContext();
__ SetAccumulator(
__ CallRuntime(Runtime::kPushBlockContext, context, scope_info, closure));
__ Dispatch();
}
// CreateCatchContext <exception> <name_idx> <scope_info_idx>
//
// Creates a new context for a catch block with the |exception| in a register,
// the variable name at |name_idx|, the ScopeInfo at |scope_info_idx|, and the
// closure in the accumulator.
void Interpreter::DoCreateCatchContext(InterpreterAssembler* assembler) {
Node* exception_reg = __ BytecodeOperandReg(0);
Node* exception = __ LoadRegister(exception_reg);
Node* name_idx = __ BytecodeOperandIdx(1);
Node* name = __ LoadConstantPoolEntry(name_idx);
Node* scope_info_idx = __ BytecodeOperandIdx(2);
Node* scope_info = __ LoadConstantPoolEntry(scope_info_idx);
Node* closure = __ GetAccumulator();
Node* context = __ GetContext();
__ SetAccumulator(__ CallRuntime(Runtime::kPushCatchContext, context, name,
exception, scope_info, closure));
__ Dispatch();
}
// CreateFunctionContext <slots>
//
// Creates a new context with number of |slots| for the function closure.
void Interpreter::DoCreateFunctionContext(InterpreterAssembler* assembler) {
Node* closure = __ LoadRegister(Register::function_closure());
Node* slots = __ BytecodeOperandUImm(0);
Node* context = __ GetContext();
__ SetAccumulator(
FastNewFunctionContextStub::Generate(assembler, closure, slots, context));
__ Dispatch();
}
// CreateWithContext <register> <scope_info_idx>
//
// Creates a new context with the ScopeInfo at |scope_info_idx| for a
// with-statement with the object in |register| and the closure in the
// accumulator.
void Interpreter::DoCreateWithContext(InterpreterAssembler* assembler) {
Node* reg_index = __ BytecodeOperandReg(0);
Node* object = __ LoadRegister(reg_index);
Node* scope_info_idx = __ BytecodeOperandIdx(1);
Node* scope_info = __ LoadConstantPoolEntry(scope_info_idx);
Node* closure = __ GetAccumulator();
Node* context = __ GetContext();
__ SetAccumulator(__ CallRuntime(Runtime::kPushWithContext, context, object,
scope_info, closure));
__ Dispatch();
}
// CreateMappedArguments
//
// Creates a new mapped arguments object.
void Interpreter::DoCreateMappedArguments(InterpreterAssembler* assembler) {
Node* closure = __ LoadRegister(Register::function_closure());
Node* context = __ GetContext();
Label if_duplicate_parameters(assembler, Label::kDeferred);
Label if_not_duplicate_parameters(assembler);
// Check if function has duplicate parameters.
// TODO(rmcilroy): Remove this check when FastNewSloppyArgumentsStub supports
// duplicate parameters.
Node* shared_info =
__ LoadObjectField(closure, JSFunction::kSharedFunctionInfoOffset);
Node* compiler_hints = __ LoadObjectField(
shared_info, SharedFunctionInfo::kHasDuplicateParametersByteOffset,
MachineType::Uint8());
Node* duplicate_parameters_bit = __ Int32Constant(
1 << SharedFunctionInfo::kHasDuplicateParametersBitWithinByte);
Node* compare = __ Word32And(compiler_hints, duplicate_parameters_bit);
__ Branch(compare, &if_duplicate_parameters, &if_not_duplicate_parameters);
__ Bind(&if_not_duplicate_parameters);
{
// TODO(rmcilroy): Inline FastNewSloppyArguments when it is a TurboFan stub.
Callable callable = CodeFactory::FastNewSloppyArguments(isolate_, true);
Node* target = __ HeapConstant(callable.code());
Node* result = __ CallStub(callable.descriptor(), target, context, closure);
__ SetAccumulator(result);
__ Dispatch();
}
__ Bind(&if_duplicate_parameters);
{
Node* result =
__ CallRuntime(Runtime::kNewSloppyArguments_Generic, context, closure);
__ SetAccumulator(result);
__ Dispatch();
}
}
// CreateUnmappedArguments
//
// Creates a new unmapped arguments object.
void Interpreter::DoCreateUnmappedArguments(InterpreterAssembler* assembler) {
// TODO(rmcilroy): Inline FastNewStrictArguments when it is a TurboFan stub.
Callable callable = CodeFactory::FastNewStrictArguments(isolate_, true);
Node* target = __ HeapConstant(callable.code());
Node* context = __ GetContext();
Node* closure = __ LoadRegister(Register::function_closure());
Node* result = __ CallStub(callable.descriptor(), target, context, closure);
__ SetAccumulator(result);
__ Dispatch();
}
// CreateRestParameter
//
// Creates a new rest parameter array.
void Interpreter::DoCreateRestParameter(InterpreterAssembler* assembler) {
// TODO(rmcilroy): Inline FastNewRestArguments when it is a TurboFan stub.
Callable callable = CodeFactory::FastNewRestParameter(isolate_, true);
Node* target = __ HeapConstant(callable.code());
Node* closure = __ LoadRegister(Register::function_closure());
Node* context = __ GetContext();
Node* result = __ CallStub(callable.descriptor(), target, context, closure);
__ SetAccumulator(result);
__ Dispatch();
}
// StackCheck
//
// Performs a stack guard check.
void Interpreter::DoStackCheck(InterpreterAssembler* assembler) {
Label ok(assembler), stack_check_interrupt(assembler, Label::kDeferred);
Node* interrupt = __ StackCheckTriggeredInterrupt();
__ Branch(interrupt, &stack_check_interrupt, &ok);
__ Bind(&ok);
__ Dispatch();
__ Bind(&stack_check_interrupt);
{
Node* context = __ GetContext();
__ CallRuntime(Runtime::kStackGuard, context);
__ Dispatch();
}
}
// Throw
//
// Throws the exception in the accumulator.
void Interpreter::DoThrow(InterpreterAssembler* assembler) {
Node* exception = __ GetAccumulator();
Node* context = __ GetContext();
__ CallRuntime(Runtime::kThrow, context, exception);
// We shouldn't ever return from a throw.
__ Abort(kUnexpectedReturnFromThrow);
}
// ReThrow
//
// Re-throws the exception in the accumulator.
void Interpreter::DoReThrow(InterpreterAssembler* assembler) {
Node* exception = __ GetAccumulator();
Node* context = __ GetContext();
__ CallRuntime(Runtime::kReThrow, context, exception);
// We shouldn't ever return from a throw.
__ Abort(kUnexpectedReturnFromThrow);
}
// Return
//
// Return the value in the accumulator.
void Interpreter::DoReturn(InterpreterAssembler* assembler) {
__ UpdateInterruptBudgetOnReturn();
Node* accumulator = __ GetAccumulator();
__ Return(accumulator);
}
// Debugger
//
// Call runtime to handle debugger statement.
void Interpreter::DoDebugger(InterpreterAssembler* assembler) {
Node* context = __ GetContext();
__ CallRuntime(Runtime::kHandleDebuggerStatement, context);
__ Dispatch();
}
// DebugBreak
//
// Call runtime to handle a debug break.
#define DEBUG_BREAK(Name, ...) \
void Interpreter::Do##Name(InterpreterAssembler* assembler) { \
Node* context = __ GetContext(); \
Node* accumulator = __ GetAccumulator(); \
Node* original_handler = \
__ CallRuntime(Runtime::kDebugBreakOnBytecode, context, accumulator); \
__ DispatchToBytecodeHandler(original_handler); \
}
DEBUG_BREAK_BYTECODE_LIST(DEBUG_BREAK);
#undef DEBUG_BREAK
void Interpreter::BuildForInPrepareResult(Node* output_register,
Node* cache_type, Node* cache_array,
Node* cache_length,
InterpreterAssembler* assembler) {
__ StoreRegister(cache_type, output_register);
output_register = __ NextRegister(output_register);
__ StoreRegister(cache_array, output_register);
output_register = __ NextRegister(output_register);
__ StoreRegister(cache_length, output_register);
}
// ForInPrepare <receiver> <cache_info_triple>
//
// Returns state for for..in loop execution based on the object in the register
// |receiver|. The object must not be null or undefined and must have been
// converted to a receiver already.
// The result is output in registers |cache_info_triple| to
// |cache_info_triple + 2|, with the registers holding cache_type, cache_array,
// and cache_length respectively.
void Interpreter::DoForInPrepare(InterpreterAssembler* assembler) {
Node* object_reg = __ BytecodeOperandReg(0);
Node* receiver = __ LoadRegister(object_reg);
Node* context = __ GetContext();
Node* const zero_smi = __ SmiConstant(Smi::kZero);
Label nothing_to_iterate(assembler, Label::kDeferred),
use_enum_cache(assembler), use_runtime(assembler, Label::kDeferred);
if (FLAG_debug_code) {
Label already_receiver(assembler), abort(assembler);
Node* instance_type = __ LoadInstanceType(receiver);
__ Branch(__ IsJSReceiverInstanceType(instance_type), &already_receiver,
&abort);
__ Bind(&abort);
{
__ Abort(kExpectedJSReceiver);
// TODO(klaasb) remove this unreachable Goto once Abort ends the block
__ Goto(&already_receiver);
}
__ Bind(&already_receiver);
}
__ CheckEnumCache(receiver, &use_enum_cache, &use_runtime);
__ Bind(&use_enum_cache);
{
// The enum cache is valid. Load the map of the object being
// iterated over and use the cache for the iteration.
Node* cache_type = __ LoadMap(receiver);
Node* cache_length = __ EnumLength(cache_type);
__ GotoIf(assembler->WordEqual(cache_length, zero_smi),
¬hing_to_iterate);
Node* descriptors = __ LoadMapDescriptors(cache_type);
Node* cache_offset =
__ LoadObjectField(descriptors, DescriptorArray::kEnumCacheOffset);
Node* cache_array = __ LoadObjectField(
cache_offset, DescriptorArray::kEnumCacheBridgeCacheOffset);
Node* output_register = __ BytecodeOperandReg(1);
BuildForInPrepareResult(output_register, cache_type, cache_array,
cache_length, assembler);
__ Dispatch();
}
__ Bind(&use_runtime);
{
Node* result_triple =
__ CallRuntime(Runtime::kForInPrepare, context, receiver);
Node* cache_type = __ Projection(0, result_triple);
Node* cache_array = __ Projection(1, result_triple);
Node* cache_length = __ Projection(2, result_triple);
Node* output_register = __ BytecodeOperandReg(1);
BuildForInPrepareResult(output_register, cache_type, cache_array,
cache_length, assembler);
__ Dispatch();
}
__ Bind(¬hing_to_iterate);
{
// Receiver is null or undefined or descriptors are zero length.
Node* output_register = __ BytecodeOperandReg(1);
BuildForInPrepareResult(output_register, zero_smi, zero_smi, zero_smi,
assembler);
__ Dispatch();
}
}
// ForInNext <receiver> <index> <cache_info_pair>
//
// Returns the next enumerable property in the the accumulator.
void Interpreter::DoForInNext(InterpreterAssembler* assembler) {
Node* receiver_reg = __ BytecodeOperandReg(0);
Node* receiver = __ LoadRegister(receiver_reg);
Node* index_reg = __ BytecodeOperandReg(1);
Node* index = __ LoadRegister(index_reg);
Node* cache_type_reg = __ BytecodeOperandReg(2);
Node* cache_type = __ LoadRegister(cache_type_reg);
Node* cache_array_reg = __ NextRegister(cache_type_reg);
Node* cache_array = __ LoadRegister(cache_array_reg);
// Load the next key from the enumeration array.
Node* key = __ LoadFixedArrayElement(cache_array, index, 0,
CodeStubAssembler::SMI_PARAMETERS);
// Check if we can use the for-in fast path potentially using the enum cache.
Label if_fast(assembler), if_slow(assembler, Label::kDeferred);
Node* receiver_map = __ LoadObjectField(receiver, HeapObject::kMapOffset);
__ Branch(__ WordEqual(receiver_map, cache_type), &if_fast, &if_slow);
__ Bind(&if_fast);
{
// Enum cache in use for {receiver}, the {key} is definitely valid.
__ SetAccumulator(key);
__ Dispatch();
}
__ Bind(&if_slow);
{
// Record the fact that we hit the for-in slow path.
Node* vector_index = __ BytecodeOperandIdx(3);
Node* type_feedback_vector = __ LoadTypeFeedbackVector();
Node* megamorphic_sentinel =
__ HeapConstant(TypeFeedbackVector::MegamorphicSentinel(isolate_));
__ StoreFixedArrayElement(type_feedback_vector, vector_index,
megamorphic_sentinel, SKIP_WRITE_BARRIER);
// Need to filter the {key} for the {receiver}.
Node* context = __ GetContext();
Callable callable = CodeFactory::ForInFilter(assembler->isolate());
Node* result = __ CallStub(callable, context, key, receiver);
__ SetAccumulator(result);
__ Dispatch();
}
}
// ForInContinue <index> <cache_length>
//
// Returns false if the end of the enumerable properties has been reached.
void Interpreter::DoForInContinue(InterpreterAssembler* assembler) {
Node* index_reg = __ BytecodeOperandReg(0);
Node* index = __ LoadRegister(index_reg);
Node* cache_length_reg = __ BytecodeOperandReg(1);
Node* cache_length = __ LoadRegister(cache_length_reg);
// Check if {index} is at {cache_length} already.
Label if_true(assembler), if_false(assembler), end(assembler);
__ Branch(__ WordEqual(index, cache_length), &if_true, &if_false);
__ Bind(&if_true);
{
__ SetAccumulator(__ BooleanConstant(false));
__ Goto(&end);
}
__ Bind(&if_false);
{
__ SetAccumulator(__ BooleanConstant(true));
__ Goto(&end);
}
__ Bind(&end);
__ Dispatch();
}
// ForInStep <index>
//
// Increments the loop counter in register |index| and stores the result
// in the accumulator.
void Interpreter::DoForInStep(InterpreterAssembler* assembler) {
Node* index_reg = __ BytecodeOperandReg(0);
Node* index = __ LoadRegister(index_reg);
Node* one = __ SmiConstant(Smi::FromInt(1));
Node* result = __ SmiAdd(index, one);
__ SetAccumulator(result);
__ Dispatch();
}
// Wide
//
// Prefix bytecode indicating next bytecode has wide (16-bit) operands.
void Interpreter::DoWide(InterpreterAssembler* assembler) {
__ DispatchWide(OperandScale::kDouble);
}
// ExtraWide
//
// Prefix bytecode indicating next bytecode has extra-wide (32-bit) operands.
void Interpreter::DoExtraWide(InterpreterAssembler* assembler) {
__ DispatchWide(OperandScale::kQuadruple);
}
// Illegal
//
// An invalid bytecode aborting execution if dispatched.
void Interpreter::DoIllegal(InterpreterAssembler* assembler) {
__ Abort(kInvalidBytecode);
}
// Nop
//
// No operation.
void Interpreter::DoNop(InterpreterAssembler* assembler) { __ Dispatch(); }
// SuspendGenerator <generator>
//
// Exports the register file and stores it into the generator. Also stores the
// current context, the state given in the accumulator, and the current bytecode
// offset (for debugging purposes) into the generator.
void Interpreter::DoSuspendGenerator(InterpreterAssembler* assembler) {
Node* generator_reg = __ BytecodeOperandReg(0);
Node* generator = __ LoadRegister(generator_reg);
Label if_stepping(assembler, Label::kDeferred), ok(assembler);
Node* step_action_address = __ ExternalConstant(
ExternalReference::debug_last_step_action_address(isolate_));
Node* step_action = __ Load(MachineType::Int8(), step_action_address);
STATIC_ASSERT(StepIn > StepNext);
STATIC_ASSERT(StepFrame > StepNext);
STATIC_ASSERT(LastStepAction == StepFrame);
Node* step_next = __ Int32Constant(StepNext);
__ Branch(__ Int32LessThanOrEqual(step_next, step_action), &if_stepping, &ok);
__ Bind(&ok);
Node* array =
__ LoadObjectField(generator, JSGeneratorObject::kOperandStackOffset);
Node* context = __ GetContext();
Node* state = __ GetAccumulator();
__ ExportRegisterFile(array);
__ StoreObjectField(generator, JSGeneratorObject::kContextOffset, context);
__ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset, state);
Node* offset = __ SmiTag(__ BytecodeOffset());
__ StoreObjectField(generator, JSGeneratorObject::kInputOrDebugPosOffset,
offset);
__ Dispatch();
__ Bind(&if_stepping);
{
Node* context = __ GetContext();
__ CallRuntime(Runtime::kDebugRecordAsyncFunction, context, generator);
__ Goto(&ok);
}
}
// ResumeGenerator <generator>
//
// Imports the register file stored in the generator. Also loads the
// generator's state and stores it in the accumulator, before overwriting it
// with kGeneratorExecuting.
void Interpreter::DoResumeGenerator(InterpreterAssembler* assembler) {
Node* generator_reg = __ BytecodeOperandReg(0);
Node* generator = __ LoadRegister(generator_reg);
__ ImportRegisterFile(
__ LoadObjectField(generator, JSGeneratorObject::kOperandStackOffset));
Node* old_state =
__ LoadObjectField(generator, JSGeneratorObject::kContinuationOffset);
Node* new_state = __ Int32Constant(JSGeneratorObject::kGeneratorExecuting);
__ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
__ SmiTag(new_state));
__ SetAccumulator(old_state);
__ Dispatch();
}
} // namespace interpreter
} // namespace internal
} // namespace v8