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2069 lines (1788 loc) · 75.9 KB
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// 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/code-assembler.h"
#include <optional>
#include <ostream>
#include <thread> // NOLINT(build/c++11) (for this_thread::yield())
#include "src/builtins/builtins-inl.h"
#include "src/builtins/constants-table-builder.h"
#include "src/codegen/compiler.h"
#include "src/codegen/interface-descriptors-inl.h"
#include "src/codegen/machine-type.h"
#include "src/codegen/tnode.h"
#include "src/compiler-dispatcher/optimizing-compile-dispatcher.h"
#include "src/compiler/backend/instruction-selector.h"
#include "src/compiler/js-graph.h"
#include "src/compiler/linkage.h"
#include "src/compiler/node-matchers.h"
#include "src/compiler/pipeline.h"
#include "src/compiler/raw-machine-assembler.h"
#include "src/compiler/schedule.h"
#include "src/compiler/turbofan-graph.h"
#include "src/handles/handles-inl.h"
#include "src/heap/factory-inl.h"
#include "src/numbers/conversions-inl.h"
#include "src/objects/smi.h"
#include "src/utils/memcopy.h"
#include "src/zone/zone.h"
namespace v8 {
namespace internal {
constexpr MachineType MachineTypeOf<Smi>::value;
constexpr MachineType MachineTypeOf<Object>::value;
constexpr MachineType MachineTypeOf<MaybeObject>::value;
namespace compiler {
static_assert(std::is_convertible_v<TNode<Number>, TNode<Object>>,
"test subtyping");
static_assert(
std::is_convertible_v<TNode<Number>, TNode<UnionOf<Smi, HeapObject>>>,
"test subtyping");
static_assert(
!std::is_convertible_v<TNode<UnionOf<Smi, HeapObject>>, TNode<Number>>,
"test subtyping");
CodeAssemblerState::CodeAssemblerState(
Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor,
CodeKind kind, const char* name, Builtin builtin)
// TODO(rmcilroy): Should we use Linkage::GetBytecodeDispatchDescriptor for
// bytecode handlers?
: CodeAssemblerState(
isolate, zone,
Linkage::GetStubCallDescriptor(
zone, descriptor, descriptor.GetStackParameterCount(),
CallDescriptor::kNoFlags, Operator::kNoProperties),
kind, name, builtin) {}
CodeAssemblerState::CodeAssemblerState(Isolate* isolate, Zone* zone,
CallDescriptor* call_descriptor,
CodeKind kind, const char* name,
Builtin builtin)
: raw_assembler_(new RawMachineAssembler(
isolate, zone->New<TFGraph>(zone), call_descriptor,
MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements())),
kind_(kind),
name_(name),
builtin_(builtin),
code_generated_(false),
variables_(zone),
jsgraph_(zone->New<JSGraph>(
isolate, raw_assembler_->graph(), raw_assembler_->common(),
zone->New<JSOperatorBuilder>(zone), raw_assembler_->simplified(),
raw_assembler_->machine())) {}
CodeAssemblerState::~CodeAssemblerState() = default;
int CodeAssemblerState::parameter_count() const {
return static_cast<int>(raw_assembler_->parameter_count());
}
CodeAssembler::~CodeAssembler() = default;
#if DEBUG
void CodeAssemblerState::PrintCurrentBlock(std::ostream& os) {
raw_assembler_->PrintCurrentBlock(os);
}
#endif
bool CodeAssemblerState::InsideBlock() { return raw_assembler_->InsideBlock(); }
void CodeAssemblerState::SetInitialDebugInformation(const char* msg,
const char* file,
int line) {
#if DEBUG
AssemblerDebugInfo debug_info = {msg, file, line};
raw_assembler_->SetCurrentExternalSourcePosition({file, line});
raw_assembler_->SetInitialDebugInformation(debug_info);
#endif // DEBUG
}
class BreakOnNodeDecorator final : public GraphDecorator {
public:
explicit BreakOnNodeDecorator(NodeId node_id) : node_id_(node_id) {}
void Decorate(Node* node) final {
if (node->id() == node_id_) {
base::OS::DebugBreak();
}
}
private:
NodeId node_id_;
};
void CodeAssembler::BreakOnNode(int node_id) {
TFGraph* graph = raw_assembler()->graph();
Zone* zone = graph->zone();
GraphDecorator* decorator =
zone->New<BreakOnNodeDecorator>(static_cast<NodeId>(node_id));
graph->AddDecorator(decorator);
}
void CodeAssembler::RegisterCallGenerationCallbacks(
const CodeAssemblerCallback& call_prologue,
const CodeAssemblerCallback& call_epilogue) {
// The callback can be registered only once.
DCHECK(!state_->call_prologue_);
DCHECK(!state_->call_epilogue_);
state_->call_prologue_ = call_prologue;
state_->call_epilogue_ = call_epilogue;
}
void CodeAssembler::UnregisterCallGenerationCallbacks() {
state_->call_prologue_ = nullptr;
state_->call_epilogue_ = nullptr;
}
void CodeAssembler::CallPrologue() {
if (state_->call_prologue_) {
state_->call_prologue_();
}
}
void CodeAssembler::CallEpilogue() {
if (state_->call_epilogue_) {
state_->call_epilogue_();
}
}
bool CodeAssembler::Word32ShiftIsSafe() const {
return raw_assembler()->machine()->Word32ShiftIsSafe();
}
CodeAssembler::BuiltinCompilationScheduler::~BuiltinCompilationScheduler() {
// Did you forget to call AwaitAndFinalizeCurrentBatch()?
CHECK_EQ(0, current_batch_zone_size_);
CHECK(main_thread_output_queue_.empty());
}
void CodeAssembler::BuiltinCompilationScheduler::CompileCode(
Isolate* isolate, std::unique_ptr<TurbofanCompilationJob> job) {
#ifdef V8_USE_ADDRESS_SANITIZER
constexpr size_t kInputZoneBatchSize = 128UL * MB;
#else // !V8_USE_ADDRESS_SANITIZER
constexpr size_t kInputZoneBatchSize = 1536UL * MB;
#endif // V8_USE_ADDRESS_SANITIZER
// This must be called from the main thread.
DCHECK_EQ(ThreadId::Current(), isolate->thread_id());
DCHECK(job->compilation_info()->code_kind() == CodeKind::BUILTIN ||
job->compilation_info()->code_kind() == CodeKind::BYTECODE_HANDLER);
CHECK_EQ(CompilationJob::SUCCEEDED, job->PrepareJob(isolate));
if (current_batch_zone_size_ >= kInputZoneBatchSize) {
AwaitAndFinalizeCurrentBatch(isolate);
}
QueueJob(isolate, std::move(job));
}
void CodeAssembler::BuiltinCompilationScheduler::QueueJob(
Isolate* isolate, std::unique_ptr<TurbofanCompilationJob> job) {
current_batch_zone_size_ +=
job->compilation_info()->zone()->allocation_size();
if (v8_flags.concurrent_builtin_generation) {
auto* dispatcher = isolate->optimizing_compile_dispatcher();
// Spin until we can queue the job.
while (!dispatcher->TryQueueForOptimization(job)) {
std::this_thread::yield();
}
} else {
CHECK_EQ(CompilationJob::SUCCEEDED,
job->ExecuteJob(isolate->counters()->runtime_call_stats(),
isolate->main_thread_local_isolate()));
if (!v8_flags.turbo_profiling) {
main_thread_output_queue_.push_back(std::move(job));
} else {
// When profiling builtins for PGO, each builtin must be completely
// generated one at a time (i.e. PrepareJob, ExecuteJob, and FinalizeJob)
// instead of batched.
FinalizeJobOnMainThread(isolate, job.get());
}
}
}
void CodeAssembler::BuiltinCompilationScheduler::FinalizeJobOnMainThread(
Isolate* isolate, TurbofanCompilationJob* job) {
CHECK_EQ(CompilationJob::SUCCEEDED, job->FinalizeJob(isolate));
builtins_installed_count_++;
}
void CodeAssembler::BuiltinCompilationScheduler::AwaitAndFinalizeCurrentBatch(
Isolate* isolate) {
if (v8_flags.concurrent_builtin_generation) {
auto* dispatcher = isolate->optimizing_compile_dispatcher();
dispatcher->WaitUntilCompilationJobsDone();
builtins_installed_count_ =
dispatcher->InstallGeneratedBuiltins(builtins_installed_count_);
} else {
DCHECK_IMPLIES(v8_flags.turbo_profiling, main_thread_output_queue_.empty());
while (!main_thread_output_queue_.empty()) {
FinalizeJobOnMainThread(isolate, main_thread_output_queue_.front().get());
main_thread_output_queue_.pop_front();
}
}
current_batch_zone_size_ = 0;
}
bool CodeAssembler::Is64() const { return raw_assembler()->machine()->Is64(); }
bool CodeAssembler::Is32() const { return raw_assembler()->machine()->Is32(); }
bool CodeAssembler::IsFloat64RoundUpSupported() const {
return raw_assembler()->machine()->Float64RoundUp().IsSupported();
}
bool CodeAssembler::IsFloat64RoundDownSupported() const {
return raw_assembler()->machine()->Float64RoundDown().IsSupported();
}
bool CodeAssembler::IsFloat64RoundTiesEvenSupported() const {
return raw_assembler()->machine()->Float64RoundTiesEven().IsSupported();
}
bool CodeAssembler::IsFloat64RoundTruncateSupported() const {
return raw_assembler()->machine()->Float64RoundTruncate().IsSupported();
}
bool CodeAssembler::IsTruncateFloat64ToFloat16RawBitsSupported() const {
return raw_assembler()
->machine()
->TruncateFloat64ToFloat16RawBits()
.IsSupported();
}
bool CodeAssembler::IsInt32AbsWithOverflowSupported() const {
return raw_assembler()->machine()->Int32AbsWithOverflow().IsSupported();
}
bool CodeAssembler::IsInt64AbsWithOverflowSupported() const {
return raw_assembler()->machine()->Int64AbsWithOverflow().IsSupported();
}
bool CodeAssembler::IsIntPtrAbsWithOverflowSupported() const {
return Is64() ? IsInt64AbsWithOverflowSupported()
: IsInt32AbsWithOverflowSupported();
}
bool CodeAssembler::IsWord32PopcntSupported() const {
return raw_assembler()->machine()->Word32Popcnt().IsSupported();
}
bool CodeAssembler::IsWord64PopcntSupported() const {
return raw_assembler()->machine()->Word64Popcnt().IsSupported();
}
bool CodeAssembler::IsWord32CtzSupported() const {
return raw_assembler()->machine()->Word32Ctz().IsSupported();
}
bool CodeAssembler::IsWord64CtzSupported() const {
return raw_assembler()->machine()->Word64Ctz().IsSupported();
}
TNode<Int32T> CodeAssembler::UniqueInt32Constant(int32_t value) {
return UncheckedCast<Int32T>(jsgraph()->UniqueInt32Constant(value));
}
TNode<Int32T> CodeAssembler::Int32Constant(int32_t value) {
return UncheckedCast<Int32T>(jsgraph()->Int32Constant(value));
}
TNode<Int64T> CodeAssembler::UniqueInt64Constant(int64_t value) {
return UncheckedCast<Int64T>(jsgraph()->UniqueInt64Constant(value));
}
TNode<Int64T> CodeAssembler::Int64Constant(int64_t value) {
return UncheckedCast<Int64T>(jsgraph()->Int64Constant(value));
}
TNode<IntPtrT> CodeAssembler::UniqueIntPtrConstant(intptr_t value) {
return UncheckedCast<IntPtrT>(jsgraph()->UniqueIntPtrConstant(value));
}
TNode<IntPtrT> CodeAssembler::IntPtrConstant(intptr_t value) {
return UncheckedCast<IntPtrT>(jsgraph()->IntPtrConstant(value));
}
TNode<TaggedIndex> CodeAssembler::TaggedIndexConstant(intptr_t value) {
DCHECK(TaggedIndex::IsValid(value));
return UncheckedCast<TaggedIndex>(jsgraph()->TaggedIndexConstant(value));
}
TNode<Number> CodeAssembler::NumberConstant(double value) {
int smi_value;
if (DoubleToSmiInteger(value, &smi_value)) {
return UncheckedCast<Number>(SmiConstant(smi_value));
} else {
// We allocate the heap number constant eagerly at this point instead of
// deferring allocation to code generation
// (see AllocateAndInstallRequestedHeapNumbers) since that makes it easier
// to generate constant lookups for embedded builtins.
return UncheckedCast<Number>(HeapConstantNoHole(
isolate()->factory()->NewHeapNumberForCodeAssembler(value)));
}
}
TNode<Smi> CodeAssembler::SmiConstant(Tagged<Smi> value) {
return UncheckedCast<Smi>(BitcastWordToTaggedSigned(
IntPtrConstant(static_cast<intptr_t>(value.ptr()))));
}
TNode<Smi> CodeAssembler::SmiConstant(int value) {
return SmiConstant(Smi::FromInt(value));
}
void CodeAssembler::CanonicalizeEmbeddedBuiltinsConstantIfNeeded(
Handle<HeapObject> object) {
// This must be called on the main thread so that the builtins constant
// indices are reproducible from run to run of mksnapshot.
DCHECK_EQ(ThreadId::Current(), isolate()->thread_id());
RootIndex dummy_root;
Builtin dummy_builtin;
if (isolate()->IsGeneratingEmbeddedBuiltins() &&
!isolate()->roots_table().IsRootHandle(object, &dummy_root) &&
!isolate()->builtins()->IsBuiltinHandle(object, &dummy_builtin) &&
!IsInstructionStream(*object)) {
isolate()->builtins_constants_table_builder()->AddObject(object);
}
}
// This emits an untyped heap constant that is never a hole.
TNode<HeapObject> CodeAssembler::UntypedHeapConstantNoHole(
Handle<HeapObject> object) {
// jsgraph()->HeapConstantNoHole does a CHECK that it is in fact a hole
// value.
CanonicalizeEmbeddedBuiltinsConstantIfNeeded(object);
return UncheckedCast<HeapObject>(jsgraph()->HeapConstantNoHole(object));
}
// This is used to emit untyped heap constants that can be a hole value.
// Only use this if you really need to and cannot use *NoHole or *Hole.
TNode<HeapObject> CodeAssembler::UntypedHeapConstantMaybeHole(
Handle<HeapObject> object) {
CanonicalizeEmbeddedBuiltinsConstantIfNeeded(object);
return UncheckedCast<HeapObject>(jsgraph()->HeapConstantMaybeHole(object));
}
// This is used to emit an untyped heap constant that can only be Hole values.
TNode<HeapObject> CodeAssembler::UntypedHeapConstantHole(
Handle<HeapObject> object) {
CanonicalizeEmbeddedBuiltinsConstantIfNeeded(object);
return UncheckedCast<HeapObject>(jsgraph()->HeapConstantHole(object));
}
TNode<String> CodeAssembler::StringConstant(const char* str) {
Handle<String> internalized_string =
factory()->InternalizeString(base::OneByteVector(str));
CanonicalizeEmbeddedBuiltinsConstantIfNeeded(internalized_string);
return UncheckedCast<String>(HeapConstantNoHole(internalized_string));
}
TNode<Boolean> CodeAssembler::BooleanConstant(bool value) {
Handle<Boolean> object = isolate()->factory()->ToBoolean(value);
return UncheckedCast<Boolean>(
jsgraph()->HeapConstantNoHole(i::Cast<HeapObject>(object)));
}
TNode<ExternalReference> CodeAssembler::ExternalConstant(
ExternalReference address) {
return UncheckedCast<ExternalReference>(
raw_assembler()->ExternalConstant(address));
}
TNode<ExternalReference> CodeAssembler::IsolateField(IsolateFieldId id) {
return ExternalConstant(ExternalReference::Create(id));
}
TNode<Float32T> CodeAssembler::Float32Constant(double value) {
return UncheckedCast<Float32T>(jsgraph()->Float32Constant(value));
}
TNode<Float64T> CodeAssembler::Float64Constant(double value) {
return UncheckedCast<Float64T>(jsgraph()->Float64Constant(value));
}
bool CodeAssembler::IsMapOffsetConstant(Node* node) {
return raw_assembler()->IsMapOffsetConstant(node);
}
bool CodeAssembler::TryToInt32Constant(TNode<IntegralT> node,
int32_t* out_value) {
{
Int64Matcher m(node);
if (m.HasResolvedValue() &&
m.IsInRange(std::numeric_limits<int32_t>::min(),
std::numeric_limits<int32_t>::max())) {
*out_value = static_cast<int32_t>(m.ResolvedValue());
return true;
}
}
{
Int32Matcher m(node);
if (m.HasResolvedValue()) {
*out_value = m.ResolvedValue();
return true;
}
}
return false;
}
bool CodeAssembler::TryToInt64Constant(TNode<IntegralT> node,
int64_t* out_value) {
Int64Matcher m(node);
if (m.HasResolvedValue()) *out_value = m.ResolvedValue();
return m.HasResolvedValue();
}
bool CodeAssembler::TryToSmiConstant(TNode<Smi> tnode, Tagged<Smi>* out_value) {
Node* node = tnode;
if (node->opcode() == IrOpcode::kBitcastWordToTaggedSigned) {
node = node->InputAt(0);
}
return TryToSmiConstant(ReinterpretCast<IntPtrT>(tnode), out_value);
}
bool CodeAssembler::TryToSmiConstant(TNode<IntegralT> node,
Tagged<Smi>* out_value) {
IntPtrMatcher m(node);
if (m.HasResolvedValue()) {
intptr_t value = m.ResolvedValue();
// Make sure that the value is actually a smi
CHECK_EQ(0, value & ((static_cast<intptr_t>(1) << kSmiShiftSize) - 1));
*out_value = Tagged<Smi>(static_cast<Address>(value));
return true;
}
return false;
}
bool CodeAssembler::TryToIntPtrConstant(TNode<Smi> tnode, intptr_t* out_value) {
Node* node = tnode;
if (node->opcode() == IrOpcode::kBitcastWordToTaggedSigned ||
node->opcode() == IrOpcode::kBitcastWordToTagged) {
node = node->InputAt(0);
}
return TryToIntPtrConstant(ReinterpretCast<IntPtrT>(tnode), out_value);
}
bool CodeAssembler::TryToIntPtrConstant(TNode<IntegralT> node,
intptr_t* out_value) {
IntPtrMatcher m(node);
if (m.HasResolvedValue()) *out_value = m.ResolvedValue();
return m.HasResolvedValue();
}
bool CodeAssembler::IsUndefinedConstant(TNode<Object> node) {
compiler::HeapObjectMatcher m(node);
return m.Is(isolate()->factory()->undefined_value());
}
bool CodeAssembler::IsNullConstant(TNode<Object> node) {
compiler::HeapObjectMatcher m(node);
return m.Is(isolate()->factory()->null_value());
}
Node* CodeAssembler::UntypedParameter(int index) {
if (index == kTargetParameterIndex) return raw_assembler()->TargetParameter();
return raw_assembler()->Parameter(index);
}
bool CodeAssembler::IsJSFunctionCall() const {
auto call_descriptor = raw_assembler()->call_descriptor();
return call_descriptor->IsJSFunctionCall();
}
TNode<Context> CodeAssembler::GetJSContextParameter() {
auto call_descriptor = raw_assembler()->call_descriptor();
DCHECK(call_descriptor->IsJSFunctionCall());
return Parameter<Context>(Linkage::GetJSCallContextParamIndex(
static_cast<int>(call_descriptor->JSParameterCount())));
}
bool CodeAssembler::HasDynamicJSParameterCount() {
return raw_assembler()->dynamic_js_parameter_count() != nullptr;
}
TNode<Uint16T> CodeAssembler::DynamicJSParameterCount() {
DCHECK(HasDynamicJSParameterCount());
return UncheckedCast<Uint16T>(raw_assembler()->dynamic_js_parameter_count());
}
void CodeAssembler::SetDynamicJSParameterCount(TNode<Uint16T> parameter_count) {
DCHECK(!HasDynamicJSParameterCount());
// For code to support a dynamic parameter count, it's static parameter count
// must currently be zero, i.e. varargs. Otherwise we'd also need to ensure
// that the dynamic parameter count is not smaller than the static one.
//
// TODO(saelo): it would probably be a bit nicer if we could assert here that
// IsJSFunctionCall() is true and then use the JSParameterCount() of the
// descriptor instead, but that doesn't work because not all users of this
// feature are TFJ builtins (some are TFC builtins).
DCHECK_EQ(raw_assembler()->call_descriptor()->ParameterSlotCount(), 0);
raw_assembler()->set_dynamic_js_parameter_count(parameter_count);
}
void CodeAssembler::Return(TNode<Object> value) {
DCHECK_EQ(1, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK(raw_assembler()->call_descriptor()->GetReturnType(0).IsTagged());
return raw_assembler()->Return(value);
}
void CodeAssembler::Return(TNode<Object> value1, TNode<Object> value2) {
DCHECK_EQ(2, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK(raw_assembler()->call_descriptor()->GetReturnType(0).IsTagged());
DCHECK(raw_assembler()->call_descriptor()->GetReturnType(1).IsTagged());
return raw_assembler()->Return(value1, value2);
}
void CodeAssembler::Return(TNode<Object> value1, TNode<Object> value2,
TNode<Object> value3) {
DCHECK_EQ(3, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK(raw_assembler()->call_descriptor()->GetReturnType(0).IsTagged());
DCHECK(raw_assembler()->call_descriptor()->GetReturnType(1).IsTagged());
DCHECK(raw_assembler()->call_descriptor()->GetReturnType(2).IsTagged());
return raw_assembler()->Return(value1, value2, value3);
}
void CodeAssembler::Return(TNode<Int32T> value) {
DCHECK_EQ(1, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK_EQ(MachineType::Int32(),
raw_assembler()->call_descriptor()->GetReturnType(0));
return raw_assembler()->Return(value);
}
void CodeAssembler::Return(TNode<Uint32T> value) {
DCHECK_EQ(1, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK_EQ(MachineType::Uint32(),
raw_assembler()->call_descriptor()->GetReturnType(0));
return raw_assembler()->Return(value);
}
void CodeAssembler::Return(TNode<WordT> value) {
DCHECK_EQ(1, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK_EQ(
MachineType::PointerRepresentation(),
raw_assembler()->call_descriptor()->GetReturnType(0).representation());
return raw_assembler()->Return(value);
}
void CodeAssembler::Return(TNode<Float32T> value) {
DCHECK_EQ(1, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK_EQ(MachineType::Float32(),
raw_assembler()->call_descriptor()->GetReturnType(0));
return raw_assembler()->Return(value);
}
void CodeAssembler::Return(TNode<Float64T> value) {
DCHECK_EQ(1, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK_EQ(MachineType::Float64(),
raw_assembler()->call_descriptor()->GetReturnType(0));
return raw_assembler()->Return(value);
}
void CodeAssembler::Return(TNode<WordT> value1, TNode<WordT> value2) {
DCHECK_EQ(2, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK_EQ(
MachineType::PointerRepresentation(),
raw_assembler()->call_descriptor()->GetReturnType(0).representation());
DCHECK_EQ(
MachineType::PointerRepresentation(),
raw_assembler()->call_descriptor()->GetReturnType(1).representation());
return raw_assembler()->Return(value1, value2);
}
void CodeAssembler::Return(TNode<Word32T> value1, TNode<Word32T> value2) {
DCHECK_EQ(2, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK_EQ(
MachineRepresentation::kWord32,
raw_assembler()->call_descriptor()->GetReturnType(0).representation());
DCHECK_EQ(
MachineRepresentation::kWord32,
raw_assembler()->call_descriptor()->GetReturnType(1).representation());
return raw_assembler()->Return(value1, value2);
}
void CodeAssembler::Return(TNode<WordT> value1, TNode<Object> value2) {
DCHECK_EQ(2, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK_EQ(
MachineType::PointerRepresentation(),
raw_assembler()->call_descriptor()->GetReturnType(0).representation());
DCHECK(raw_assembler()->call_descriptor()->GetReturnType(1).IsTagged());
return raw_assembler()->Return(value1, value2);
}
void CodeAssembler::Return(TNode<Word32T> value1, TNode<Object> value2) {
DCHECK_EQ(2, raw_assembler()->call_descriptor()->ReturnCount());
DCHECK_EQ(
MachineRepresentation::kWord32,
raw_assembler()->call_descriptor()->GetReturnType(0).representation());
DCHECK(raw_assembler()->call_descriptor()->GetReturnType(1).IsTagged());
return raw_assembler()->Return(value1, value2);
}
void CodeAssembler::PopAndReturn(Node* pop, Node* value) {
DCHECK_EQ(1, raw_assembler()->call_descriptor()->ReturnCount());
return raw_assembler()->PopAndReturn(pop, value);
}
void CodeAssembler::PopAndReturn(Node* pop, Node* value1, Node* value2,
Node* value3, Node* value4) {
DCHECK_EQ(4, raw_assembler()->call_descriptor()->ReturnCount());
return raw_assembler()->PopAndReturn(pop, value1, value2, value3, value4);
}
void CodeAssembler::ReturnIf(TNode<BoolT> condition, TNode<Object> value) {
Label if_return(this), if_continue(this);
Branch(condition, &if_return, &if_continue);
Bind(&if_return);
Return(value);
Bind(&if_continue);
}
void CodeAssembler::AbortCSADcheck(Node* message) {
raw_assembler()->AbortCSADcheck(message);
}
void CodeAssembler::DebugBreak() { raw_assembler()->DebugBreak(); }
void CodeAssembler::Unreachable() {
DebugBreak();
raw_assembler()->Unreachable();
}
void CodeAssembler::EmitComment(std::string str) {
if (!v8_flags.code_comments) return;
raw_assembler()->Comment(str);
}
void CodeAssembler::StaticAssert(TNode<BoolT> value, const char* source) {
raw_assembler()->StaticAssert(value, source);
}
void CodeAssembler::SetSourcePosition(const char* file, int line) {
raw_assembler()->SetCurrentExternalSourcePosition({file, line});
}
void CodeAssembler::PushSourcePosition() {
auto position = raw_assembler()->GetCurrentExternalSourcePosition();
state_->macro_call_stack_.push_back(position);
}
void CodeAssembler::PopSourcePosition() {
state_->macro_call_stack_.pop_back();
}
const std::vector<FileAndLine>& CodeAssembler::GetMacroSourcePositionStack()
const {
return state_->macro_call_stack_;
}
void CodeAssembler::Bind(Label* label) { return label->Bind(); }
#if DEBUG
void CodeAssembler::Bind(Label* label, AssemblerDebugInfo debug_info) {
return label->Bind(debug_info);
}
#endif // DEBUG
TNode<RawPtrT> CodeAssembler::LoadFramePointer() {
return UncheckedCast<RawPtrT>(raw_assembler()->LoadFramePointer());
}
TNode<RawPtrT> CodeAssembler::LoadParentFramePointer() {
return UncheckedCast<RawPtrT>(raw_assembler()->LoadParentFramePointer());
}
#if V8_ENABLE_WEBASSEMBLY
TNode<RawPtrT> CodeAssembler::LoadStackPointer() {
return UncheckedCast<RawPtrT>(raw_assembler()->LoadStackPointer());
}
void CodeAssembler::SetStackPointer(TNode<RawPtrT> ptr) {
raw_assembler()->SetStackPointer(ptr);
}
#endif
TNode<Object> CodeAssembler::LoadTaggedFromRootRegister(TNode<IntPtrT> offset) {
return BitcastWordToTagged(LoadPointerFromRootRegister(offset));
}
TNode<RawPtrT> CodeAssembler::LoadPointerFromRootRegister(
TNode<IntPtrT> offset) {
return UncheckedCast<RawPtrT>(
Load(MachineType::IntPtr(), raw_assembler()->LoadRootRegister(), offset));
}
TNode<Uint8T> CodeAssembler::LoadUint8FromRootRegister(TNode<IntPtrT> offset) {
return UncheckedCast<Uint8T>(
Load(MachineType::Uint8(), raw_assembler()->LoadRootRegister(), offset));
}
TNode<RawPtrT> CodeAssembler::StackSlotPtr(int size, int alignment) {
return UncheckedCast<RawPtrT>(raw_assembler()->StackSlot(size, alignment));
}
#define DEFINE_CODE_ASSEMBLER_BINARY_OP(name, ResType, Arg1Type, Arg2Type) \
TNode<ResType> CodeAssembler::name(TNode<Arg1Type> a, TNode<Arg2Type> b) { \
return UncheckedCast<ResType>(raw_assembler()->name(a, b)); \
}
CODE_ASSEMBLER_BINARY_OP_LIST(DEFINE_CODE_ASSEMBLER_BINARY_OP)
#undef DEFINE_CODE_ASSEMBLER_BINARY_OP
TNode<PairT<Word32T, Word32T>> CodeAssembler::Int32PairAdd(
TNode<Word32T> lhs_lo_word, TNode<Word32T> lhs_hi_word,
TNode<Word32T> rhs_lo_word, TNode<Word32T> rhs_hi_word) {
return UncheckedCast<PairT<Word32T, Word32T>>(raw_assembler()->Int32PairAdd(
lhs_lo_word, lhs_hi_word, rhs_lo_word, rhs_hi_word));
}
TNode<PairT<Word32T, Word32T>> CodeAssembler::Int32PairSub(
TNode<Word32T> lhs_lo_word, TNode<Word32T> lhs_hi_word,
TNode<Word32T> rhs_lo_word, TNode<Word32T> rhs_hi_word) {
return UncheckedCast<PairT<Word32T, Word32T>>(raw_assembler()->Int32PairSub(
lhs_lo_word, lhs_hi_word, rhs_lo_word, rhs_hi_word));
}
TNode<WordT> CodeAssembler::WordShl(TNode<WordT> value, int shift) {
return (shift != 0) ? WordShl(value, IntPtrConstant(shift)) : value;
}
TNode<WordT> CodeAssembler::WordShr(TNode<WordT> value, int shift) {
return (shift != 0) ? WordShr(value, IntPtrConstant(shift)) : value;
}
TNode<WordT> CodeAssembler::WordSar(TNode<WordT> value, int shift) {
return (shift != 0) ? WordSar(value, IntPtrConstant(shift)) : value;
}
TNode<Word32T> CodeAssembler::Word32Shr(TNode<Word32T> value, int shift) {
return (shift != 0) ? Word32Shr(value, Int32Constant(shift)) : value;
}
TNode<Word32T> CodeAssembler::Word32Sar(TNode<Word32T> value, int shift) {
return (shift != 0) ? Word32Sar(value, Int32Constant(shift)) : value;
}
#define CODE_ASSEMBLER_COMPARE(Name, ArgT, VarT, ToConstant, op) \
TNode<BoolT> CodeAssembler::Name(TNode<ArgT> left, TNode<ArgT> right) { \
VarT lhs, rhs; \
if (ToConstant(left, &lhs) && ToConstant(right, &rhs)) { \
return BoolConstant(lhs op rhs); \
} \
return UncheckedCast<BoolT>(raw_assembler()->Name(left, right)); \
}
CODE_ASSEMBLER_COMPARE(IntPtrEqual, WordT, intptr_t, TryToIntPtrConstant, ==)
CODE_ASSEMBLER_COMPARE(WordEqual, WordT, intptr_t, TryToIntPtrConstant, ==)
CODE_ASSEMBLER_COMPARE(WordNotEqual, WordT, intptr_t, TryToIntPtrConstant, !=)
CODE_ASSEMBLER_COMPARE(Word32Equal, Word32T, int32_t, TryToInt32Constant, ==)
CODE_ASSEMBLER_COMPARE(Word32NotEqual, Word32T, int32_t, TryToInt32Constant, !=)
CODE_ASSEMBLER_COMPARE(Word64Equal, Word64T, int64_t, TryToInt64Constant, ==)
CODE_ASSEMBLER_COMPARE(Word64NotEqual, Word64T, int64_t, TryToInt64Constant, !=)
#undef CODE_ASSEMBLER_COMPARE
TNode<UintPtrT> CodeAssembler::ChangeUint32ToWord(TNode<Word32T> value) {
if (raw_assembler()->machine()->Is64()) {
return UncheckedCast<UintPtrT>(
raw_assembler()->ChangeUint32ToUint64(value));
}
return ReinterpretCast<UintPtrT>(value);
}
TNode<IntPtrT> CodeAssembler::ChangeInt32ToIntPtr(TNode<Word32T> value) {
if (raw_assembler()->machine()->Is64()) {
return UncheckedCast<IntPtrT>(raw_assembler()->ChangeInt32ToInt64(value));
}
return ReinterpretCast<IntPtrT>(value);
}
TNode<IntPtrT> CodeAssembler::ChangeFloat64ToIntPtr(TNode<Float64T> value) {
if (raw_assembler()->machine()->Is64()) {
return UncheckedCast<IntPtrT>(raw_assembler()->ChangeFloat64ToInt64(value));
}
return UncheckedCast<IntPtrT>(raw_assembler()->ChangeFloat64ToInt32(value));
}
TNode<UintPtrT> CodeAssembler::ChangeFloat64ToUintPtr(TNode<Float64T> value) {
if (raw_assembler()->machine()->Is64()) {
return UncheckedCast<UintPtrT>(
raw_assembler()->ChangeFloat64ToUint64(value));
}
return UncheckedCast<UintPtrT>(raw_assembler()->ChangeFloat64ToUint32(value));
}
TNode<Float64T> CodeAssembler::ChangeUintPtrToFloat64(TNode<UintPtrT> value) {
if (raw_assembler()->machine()->Is64()) {
// TODO(turbofan): Maybe we should introduce a ChangeUint64ToFloat64
// machine operator to TurboFan here?
return UncheckedCast<Float64T>(
raw_assembler()->RoundUint64ToFloat64(value));
}
return UncheckedCast<Float64T>(raw_assembler()->ChangeUint32ToFloat64(value));
}
TNode<Float64T> CodeAssembler::RoundIntPtrToFloat64(Node* value) {
if (raw_assembler()->machine()->Is64()) {
return UncheckedCast<Float64T>(raw_assembler()->RoundInt64ToFloat64(value));
}
return UncheckedCast<Float64T>(raw_assembler()->ChangeInt32ToFloat64(value));
}
TNode<Int32T> CodeAssembler::TruncateFloat32ToInt32(TNode<Float32T> value) {
return UncheckedCast<Int32T>(raw_assembler()->TruncateFloat32ToInt32(
value, TruncateKind::kSetOverflowToMin));
}
TNode<Int64T> CodeAssembler::TruncateFloat64ToInt64(TNode<Float64T> value) {
return UncheckedCast<Int64T>(raw_assembler()->TruncateFloat64ToInt64(
value, TruncateKind::kSetOverflowToMin));
}
#define DEFINE_CODE_ASSEMBLER_UNARY_OP(name, ResType, ArgType) \
TNode<ResType> CodeAssembler::name(TNode<ArgType> a) { \
return UncheckedCast<ResType>(raw_assembler()->name(a)); \
}
CODE_ASSEMBLER_UNARY_OP_LIST(DEFINE_CODE_ASSEMBLER_UNARY_OP)
#undef DEFINE_CODE_ASSEMBLER_UNARY_OP
Node* CodeAssembler::Load(MachineType type, Node* base) {
return raw_assembler()->Load(type, base);
}
Node* CodeAssembler::Load(MachineType type, Node* base, Node* offset) {
return raw_assembler()->Load(type, base, offset);
}
TNode<Object> CodeAssembler::LoadFullTagged(Node* base) {
return BitcastWordToTagged(Load<RawPtrT>(base));
}
TNode<Object> CodeAssembler::LoadFullTagged(Node* base, TNode<IntPtrT> offset) {
// Please use LoadFromObject(MachineType::MapInHeader(), object,
// IntPtrConstant(-kHeapObjectTag)) instead.
DCHECK(!raw_assembler()->IsMapOffsetConstantMinusTag(offset));
return BitcastWordToTagged(Load<RawPtrT>(base, offset));
}
Node* CodeAssembler::AtomicLoad(MachineType type, AtomicMemoryOrder order,
TNode<RawPtrT> base, TNode<WordT> offset) {
DCHECK(!raw_assembler()->IsMapOffsetConstantMinusTag(offset));
return raw_assembler()->AtomicLoad(AtomicLoadParameters(type, order), base,
offset);
}
template <class Type>
TNode<Type> CodeAssembler::AtomicLoad64(AtomicMemoryOrder order,
TNode<RawPtrT> base,
TNode<WordT> offset) {
return UncheckedCast<Type>(raw_assembler()->AtomicLoad64(
AtomicLoadParameters(MachineType::Uint64(), order), base, offset));
}
template TNode<AtomicInt64> CodeAssembler::AtomicLoad64<AtomicInt64>(
AtomicMemoryOrder order, TNode<RawPtrT> base, TNode<WordT> offset);
template TNode<AtomicUint64> CodeAssembler::AtomicLoad64<AtomicUint64>(
AtomicMemoryOrder order, TNode<RawPtrT> base, TNode<WordT> offset);
Node* CodeAssembler::LoadFromObject(MachineType type, TNode<Object> object,
TNode<IntPtrT> offset) {
return raw_assembler()->LoadFromObject(type, object, offset);
}
Node* CodeAssembler::LoadProtectedPointerFromObject(TNode<Object> object,
TNode<IntPtrT> offset) {
return raw_assembler()->LoadProtectedPointerFromObject(object, offset);
}
#ifdef V8_MAP_PACKING
Node* CodeAssembler::PackMapWord(Node* value) {
TNode<IntPtrT> map_word =
BitcastTaggedToWordForTagAndSmiBits(UncheckedCast<AnyTaggedT>(value));
TNode<WordT> packed = WordXor(UncheckedCast<WordT>(map_word),
IntPtrConstant(Internals::kMapWordXorMask));
return BitcastWordToTaggedSigned(packed);
}
#endif
TNode<AnyTaggedT> CodeAssembler::LoadRootMapWord(RootIndex root_index) {
#ifdef V8_MAP_PACKING
Handle<Object> root = isolate()->root_handle(root_index);
Node* map = HeapConstantNoHole(Cast<Map>(root));
map = PackMapWord(map);
return ReinterpretCast<AnyTaggedT>(map);
#else
return LoadRoot(root_index);
#endif
}
TNode<Object> CodeAssembler::LoadRoot(RootIndex root_index) {
if (RootsTable::IsImmortalImmovable(root_index)) {
Handle<Object> root = isolate()->root_handle(root_index);
if (IsSmi(*root)) {
return SmiConstant(i::Cast<Smi>(*root));
} else {
return HeapConstantMaybeHole(i::Cast<HeapObject>(root));
}
}
// TODO(jgruber): In theory we could generate better code for this by
// letting the macro assembler decide how to load from the roots list. In most
// cases, it would boil down to loading from a fixed kRootRegister offset.
TNode<ExternalReference> isolate_root =
ExternalConstant(ExternalReference::isolate_root(isolate()));
int offset = IsolateData::root_slot_offset(root_index);
return UncheckedCast<Object>(
LoadFullTagged(isolate_root, IntPtrConstant(offset)));
}
Node* CodeAssembler::UnalignedLoad(MachineType type, TNode<RawPtrT> base,
TNode<WordT> offset) {
return raw_assembler()->UnalignedLoad(type, static_cast<Node*>(base), offset);
}
void CodeAssembler::Store(Node* base, Node* value) {
raw_assembler()->Store(MachineRepresentation::kTagged, base, value,
kFullWriteBarrier);
}
void CodeAssembler::StoreToObject(MachineRepresentation rep,
TNode<Object> object, TNode<IntPtrT> offset,
Node* value,
StoreToObjectWriteBarrier write_barrier) {
WriteBarrierKind write_barrier_kind;
switch (write_barrier) {
case StoreToObjectWriteBarrier::kFull:
write_barrier_kind = WriteBarrierKind::kFullWriteBarrier;
break;
case StoreToObjectWriteBarrier::kMap:
write_barrier_kind = WriteBarrierKind::kMapWriteBarrier;
break;
case StoreToObjectWriteBarrier::kNone:
if (CanBeTaggedPointer(rep)) {
write_barrier_kind = WriteBarrierKind::kAssertNoWriteBarrier;
} else {
write_barrier_kind = WriteBarrierKind::kNoWriteBarrier;
}
break;
}
raw_assembler()->StoreToObject(rep, object, offset, value,
write_barrier_kind);
}
void CodeAssembler::OptimizedStoreField(MachineRepresentation rep,
TNode<HeapObject> object, int offset,
Node* value) {
raw_assembler()->OptimizedStoreField(rep, object, offset, value,
WriteBarrierKind::kFullWriteBarrier);
}
void CodeAssembler::OptimizedStoreIndirectPointerField(TNode<HeapObject> object,
int offset,
IndirectPointerTag tag,
Node* value) {
raw_assembler()->OptimizedStoreIndirectPointerField(
object, offset, tag, value,
WriteBarrierKind::kIndirectPointerWriteBarrier);
}
void CodeAssembler::OptimizedStoreIndirectPointerFieldNoWriteBarrier(
TNode<HeapObject> object, int offset, IndirectPointerTag tag, Node* value) {
raw_assembler()->OptimizedStoreIndirectPointerField(
object, offset, tag, value, WriteBarrierKind::kNoWriteBarrier);