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cobalt / cobalt / ef837fa448402e2ada2fb3821210cc20d850164b / . / src / v8 / src / compiler / pipeline.cc
blob: e2d93e6321110001e5894ba1e5534247a0e1d3da [file] [log] [blame]
// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/compiler/pipeline.h"
#include <fstream> // NOLINT(readability/streams)
#include <memory>
#include <sstream>
#include "src/assembler-inl.h"
#include "src/base/adapters.h"
#include "src/base/optional.h"
#include "src/base/platform/elapsed-timer.h"
#include "src/compilation-info.h"
#include "src/compiler.h"
#include "src/compiler/basic-block-instrumentor.h"
#include "src/compiler/branch-elimination.h"
#include "src/compiler/bytecode-graph-builder.h"
#include "src/compiler/checkpoint-elimination.h"
#include "src/compiler/code-generator.h"
#include "src/compiler/common-operator-reducer.h"
#include "src/compiler/compiler-source-position-table.h"
#include "src/compiler/control-flow-optimizer.h"
#include "src/compiler/dead-code-elimination.h"
#include "src/compiler/effect-control-linearizer.h"
#include "src/compiler/escape-analysis-reducer.h"
#include "src/compiler/escape-analysis.h"
#include "src/compiler/frame-elider.h"
#include "src/compiler/graph-trimmer.h"
#include "src/compiler/graph-visualizer.h"
#include "src/compiler/instruction-selector.h"
#include "src/compiler/instruction.h"
#include "src/compiler/js-builtin-reducer.h"
#include "src/compiler/js-call-reducer.h"
#include "src/compiler/js-context-specialization.h"
#include "src/compiler/js-create-lowering.h"
#include "src/compiler/js-generic-lowering.h"
#include "src/compiler/js-inlining-heuristic.h"
#include "src/compiler/js-intrinsic-lowering.h"
#include "src/compiler/js-native-context-specialization.h"
#include "src/compiler/js-typed-lowering.h"
#include "src/compiler/jump-threading.h"
#include "src/compiler/live-range-separator.h"
#include "src/compiler/load-elimination.h"
#include "src/compiler/loop-analysis.h"
#include "src/compiler/loop-peeling.h"
#include "src/compiler/loop-variable-optimizer.h"
#include "src/compiler/machine-graph-verifier.h"
#include "src/compiler/machine-operator-reducer.h"
#include "src/compiler/memory-optimizer.h"
#include "src/compiler/move-optimizer.h"
#include "src/compiler/osr.h"
#include "src/compiler/pipeline-statistics.h"
#include "src/compiler/redundancy-elimination.h"
#include "src/compiler/register-allocator-verifier.h"
#include "src/compiler/register-allocator.h"
#include "src/compiler/schedule.h"
#include "src/compiler/scheduler.h"
#include "src/compiler/select-lowering.h"
#include "src/compiler/simplified-lowering.h"
#include "src/compiler/simplified-operator-reducer.h"
#include "src/compiler/simplified-operator.h"
#include "src/compiler/store-store-elimination.h"
#include "src/compiler/typed-optimization.h"
#include "src/compiler/typer.h"
#include "src/compiler/value-numbering-reducer.h"
#include "src/compiler/verifier.h"
#include "src/compiler/zone-stats.h"
#include "src/isolate-inl.h"
#include "src/ostreams.h"
#include "src/parsing/parse-info.h"
#include "src/register-configuration.h"
#include "src/trap-handler/trap-handler.h"
#include "src/utils.h"
#include "src/wasm/wasm-module.h"
namespace v8 {
namespace internal {
namespace compiler {
class PipelineData {
public:
// For main entry point.
PipelineData(ZoneStats* zone_stats, CompilationInfo* info,
PipelineStatistics* pipeline_statistics)
: isolate_(info->isolate()),
info_(info),
debug_name_(info_->GetDebugName()),
may_have_unverifiable_graph_(false),
zone_stats_(zone_stats),
pipeline_statistics_(pipeline_statistics),
graph_zone_scope_(zone_stats_, ZONE_NAME),
graph_zone_(graph_zone_scope_.zone()),
instruction_zone_scope_(zone_stats_, ZONE_NAME),
instruction_zone_(instruction_zone_scope_.zone()),
codegen_zone_scope_(zone_stats_, ZONE_NAME),
codegen_zone_(codegen_zone_scope_.zone()),
register_allocation_zone_scope_(zone_stats_, ZONE_NAME),
register_allocation_zone_(register_allocation_zone_scope_.zone()) {
PhaseScope scope(pipeline_statistics, "init pipeline data");
graph_ = new (graph_zone_) Graph(graph_zone_);
source_positions_ = new (graph_zone_) SourcePositionTable(graph_);
simplified_ = new (graph_zone_) SimplifiedOperatorBuilder(graph_zone_);
machine_ = new (graph_zone_) MachineOperatorBuilder(
graph_zone_, MachineType::PointerRepresentation(),
InstructionSelector::SupportedMachineOperatorFlags(),
InstructionSelector::AlignmentRequirements());
common_ = new (graph_zone_) CommonOperatorBuilder(graph_zone_);
javascript_ = new (graph_zone_) JSOperatorBuilder(graph_zone_);
jsgraph_ = new (graph_zone_)
JSGraph(isolate_, graph_, common_, javascript_, simplified_, machine_);
}
// For WebAssembly compile entry point.
PipelineData(ZoneStats* zone_stats, CompilationInfo* info, JSGraph* jsgraph,
PipelineStatistics* pipeline_statistics,
SourcePositionTable* source_positions,
ZoneVector<trap_handler::ProtectedInstructionData>*
protected_instructions)
: isolate_(info->isolate()),
info_(info),
debug_name_(info_->GetDebugName()),
zone_stats_(zone_stats),
pipeline_statistics_(pipeline_statistics),
graph_zone_scope_(zone_stats_, ZONE_NAME),
graph_(jsgraph->graph()),
source_positions_(source_positions),
machine_(jsgraph->machine()),
common_(jsgraph->common()),
javascript_(jsgraph->javascript()),
jsgraph_(jsgraph),
instruction_zone_scope_(zone_stats_, ZONE_NAME),
instruction_zone_(instruction_zone_scope_.zone()),
codegen_zone_scope_(zone_stats_, ZONE_NAME),
codegen_zone_(codegen_zone_scope_.zone()),
register_allocation_zone_scope_(zone_stats_, ZONE_NAME),
register_allocation_zone_(register_allocation_zone_scope_.zone()),
protected_instructions_(protected_instructions) {
}
// For machine graph testing entry point.
PipelineData(ZoneStats* zone_stats, CompilationInfo* info, Graph* graph,
Schedule* schedule, SourcePositionTable* source_positions,
JumpOptimizationInfo* jump_opt)
: isolate_(info->isolate()),
info_(info),
debug_name_(info_->GetDebugName()),
zone_stats_(zone_stats),
graph_zone_scope_(zone_stats_, ZONE_NAME),
graph_(graph),
source_positions_(source_positions),
schedule_(schedule),
instruction_zone_scope_(zone_stats_, ZONE_NAME),
instruction_zone_(instruction_zone_scope_.zone()),
codegen_zone_scope_(zone_stats_, ZONE_NAME),
codegen_zone_(codegen_zone_scope_.zone()),
register_allocation_zone_scope_(zone_stats_, ZONE_NAME),
register_allocation_zone_(register_allocation_zone_scope_.zone()),
jump_optimization_info_(jump_opt) {}
// For register allocation testing entry point.
PipelineData(ZoneStats* zone_stats, CompilationInfo* info,
InstructionSequence* sequence)
: isolate_(info->isolate()),
info_(info),
debug_name_(info_->GetDebugName()),
zone_stats_(zone_stats),
graph_zone_scope_(zone_stats_, ZONE_NAME),
instruction_zone_scope_(zone_stats_, ZONE_NAME),
instruction_zone_(sequence->zone()),
sequence_(sequence),
codegen_zone_scope_(zone_stats_, ZONE_NAME),
codegen_zone_(codegen_zone_scope_.zone()),
register_allocation_zone_scope_(zone_stats_, ZONE_NAME),
register_allocation_zone_(register_allocation_zone_scope_.zone()) {
}
~PipelineData() {
delete code_generator_; // Must happen before zones are destroyed.
code_generator_ = nullptr;
DeleteRegisterAllocationZone();
DeleteInstructionZone();
DeleteCodegenZone();
DeleteGraphZone();
}
Isolate* isolate() const { return isolate_; }
CompilationInfo* info() const { return info_; }
ZoneStats* zone_stats() const { return zone_stats_; }
PipelineStatistics* pipeline_statistics() { return pipeline_statistics_; }
OsrHelper* osr_helper() { return &(*osr_helper_); }
bool compilation_failed() const { return compilation_failed_; }
void set_compilation_failed() { compilation_failed_ = true; }
bool verify_graph() const { return verify_graph_; }
void set_verify_graph(bool value) { verify_graph_ = value; }
Handle<Code> code() { return code_; }
void set_code(Handle<Code> code) {
DCHECK(code_.is_null());
code_ = code;
}
CodeGenerator* code_generator() const { return code_generator_; }
// RawMachineAssembler generally produces graphs which cannot be verified.
bool MayHaveUnverifiableGraph() const { return may_have_unverifiable_graph_; }
Zone* graph_zone() const { return graph_zone_; }
Graph* graph() const { return graph_; }
SourcePositionTable* source_positions() const { return source_positions_; }
MachineOperatorBuilder* machine() const { return machine_; }
CommonOperatorBuilder* common() const { return common_; }
JSOperatorBuilder* javascript() const { return javascript_; }
JSGraph* jsgraph() const { return jsgraph_; }
Handle<Context> native_context() const {
return handle(info()->native_context(), isolate());
}
Handle<JSGlobalObject> global_object() const {
return handle(info()->global_object(), isolate());
}
Schedule* schedule() const { return schedule_; }
void set_schedule(Schedule* schedule) {
DCHECK(!schedule_);
schedule_ = schedule;
}
void reset_schedule() { schedule_ = nullptr; }
Zone* instruction_zone() const { return instruction_zone_; }
Zone* codegen_zone() const { return codegen_zone_; }
InstructionSequence* sequence() const { return sequence_; }
Frame* frame() const { return frame_; }
Zone* register_allocation_zone() const { return register_allocation_zone_; }
RegisterAllocationData* register_allocation_data() const {
return register_allocation_data_;
}
BasicBlockProfiler::Data* profiler_data() const { return profiler_data_; }
void set_profiler_data(BasicBlockProfiler::Data* profiler_data) {
profiler_data_ = profiler_data;
}
std::string const& source_position_output() const {
return source_position_output_;
}
void set_source_position_output(std::string const& source_position_output) {
source_position_output_ = source_position_output;
}
ZoneVector<trap_handler::ProtectedInstructionData>* protected_instructions()
const {
return protected_instructions_;
}
JumpOptimizationInfo* jump_optimization_info() const {
return jump_optimization_info_;
}
void DeleteGraphZone() {
if (graph_zone_ == nullptr) return;
graph_zone_scope_.Destroy();
graph_zone_ = nullptr;
graph_ = nullptr;
source_positions_ = nullptr;
simplified_ = nullptr;
machine_ = nullptr;
common_ = nullptr;
javascript_ = nullptr;
jsgraph_ = nullptr;
schedule_ = nullptr;
}
void DeleteInstructionZone() {
if (instruction_zone_ == nullptr) return;
instruction_zone_scope_.Destroy();
instruction_zone_ = nullptr;
sequence_ = nullptr;
}
void DeleteCodegenZone() {
if (codegen_zone_ == nullptr) return;
codegen_zone_scope_.Destroy();
codegen_zone_ = nullptr;
frame_ = nullptr;
}
void DeleteRegisterAllocationZone() {
if (register_allocation_zone_ == nullptr) return;
register_allocation_zone_scope_.Destroy();
register_allocation_zone_ = nullptr;
register_allocation_data_ = nullptr;
}
void InitializeInstructionSequence(const CallDescriptor* descriptor) {
DCHECK_NULL(sequence_);
InstructionBlocks* instruction_blocks =
InstructionSequence::InstructionBlocksFor(instruction_zone(),
schedule());
sequence_ = new (instruction_zone()) InstructionSequence(
info()->isolate(), instruction_zone(), instruction_blocks);
if (descriptor && descriptor->RequiresFrameAsIncoming()) {
sequence_->instruction_blocks()[0]->mark_needs_frame();
} else {
DCHECK_EQ(0u, descriptor->CalleeSavedFPRegisters());
DCHECK_EQ(0u, descriptor->CalleeSavedRegisters());
}
}
void InitializeFrameData(CallDescriptor* descriptor) {
DCHECK_NULL(frame_);
int fixed_frame_size = 0;
if (descriptor != nullptr) {
fixed_frame_size = descriptor->CalculateFixedFrameSize();
}
frame_ = new (codegen_zone()) Frame(fixed_frame_size);
}
void InitializeRegisterAllocationData(const RegisterConfiguration* config,
CallDescriptor* descriptor) {
DCHECK_NULL(register_allocation_data_);
register_allocation_data_ = new (register_allocation_zone())
RegisterAllocationData(config, register_allocation_zone(), frame(),
sequence(), debug_name());
}
void InitializeOsrHelper() {
DCHECK(!osr_helper_.has_value());
osr_helper_.emplace(info());
}
void set_start_source_position(int position) {
DCHECK_EQ(start_source_position_, kNoSourcePosition);
start_source_position_ = position;
}
void InitializeCodeGenerator(Linkage* linkage) {
DCHECK_NULL(code_generator_);
code_generator_ = new CodeGenerator(
codegen_zone(), frame(), linkage, sequence(), info(), osr_helper_,
start_source_position_, jump_optimization_info_);
}
void BeginPhaseKind(const char* phase_kind_name) {
if (pipeline_statistics() != nullptr) {
pipeline_statistics()->BeginPhaseKind(phase_kind_name);
}
}
void EndPhaseKind() {
if (pipeline_statistics() != nullptr) {
pipeline_statistics()->EndPhaseKind();
}
}
const char* debug_name() const { return debug_name_.get(); }
private:
Isolate* const isolate_;
CompilationInfo* const info_;
std::unique_ptr<char[]> debug_name_;
bool may_have_unverifiable_graph_ = true;
ZoneStats* const zone_stats_;
PipelineStatistics* pipeline_statistics_ = nullptr;
bool compilation_failed_ = false;
bool verify_graph_ = false;
int start_source_position_ = kNoSourcePosition;
base::Optional<OsrHelper> osr_helper_;
Handle<Code> code_ = Handle<Code>::null();
CodeGenerator* code_generator_ = nullptr;
// All objects in the following group of fields are allocated in graph_zone_.
// They are all set to nullptr when the graph_zone_ is destroyed.
ZoneStats::Scope graph_zone_scope_;
Zone* graph_zone_ = nullptr;
Graph* graph_ = nullptr;
SourcePositionTable* source_positions_ = nullptr;
SimplifiedOperatorBuilder* simplified_ = nullptr;
MachineOperatorBuilder* machine_ = nullptr;
CommonOperatorBuilder* common_ = nullptr;
JSOperatorBuilder* javascript_ = nullptr;
JSGraph* jsgraph_ = nullptr;
Schedule* schedule_ = nullptr;
// All objects in the following group of fields are allocated in
// instruction_zone_. They are all set to nullptr when the instruction_zone_
// is destroyed.
ZoneStats::Scope instruction_zone_scope_;
Zone* instruction_zone_;
InstructionSequence* sequence_ = nullptr;
// All objects in the following group of fields are allocated in
// codegen_zone_. They are all set to nullptr when the codegen_zone_
// is destroyed.
ZoneStats::Scope codegen_zone_scope_;
Zone* codegen_zone_;
Frame* frame_ = nullptr;
// All objects in the following group of fields are allocated in
// register_allocation_zone_. They are all set to nullptr when the zone is
// destroyed.
ZoneStats::Scope register_allocation_zone_scope_;
Zone* register_allocation_zone_;
RegisterAllocationData* register_allocation_data_ = nullptr;
// Basic block profiling support.
BasicBlockProfiler::Data* profiler_data_ = nullptr;
// Source position output for --trace-turbo.
std::string source_position_output_;
ZoneVector<trap_handler::ProtectedInstructionData>* protected_instructions_ =
nullptr;
JumpOptimizationInfo* jump_optimization_info_ = nullptr;
DISALLOW_COPY_AND_ASSIGN(PipelineData);
};
class PipelineImpl final {
public:
explicit PipelineImpl(PipelineData* data) : data_(data) {}
// Helpers for executing pipeline phases.
template <typename Phase>
void Run();
template <typename Phase, typename Arg0>
void Run(Arg0 arg_0);
template <typename Phase, typename Arg0, typename Arg1>
void Run(Arg0 arg_0, Arg1 arg_1);
// Run the graph creation and initial optimization passes.
bool CreateGraph();
// Run the concurrent optimization passes.
bool OptimizeGraph(Linkage* linkage);
// Run the code assembly pass.
void AssembleCode(Linkage* linkage);
// Run the code finalization pass.
Handle<Code> FinalizeCode();
bool ScheduleAndSelectInstructions(Linkage* linkage, bool trim_graph);
void RunPrintAndVerify(const char* phase, bool untyped = false);
Handle<Code> ScheduleAndGenerateCode(CallDescriptor* call_descriptor);
void AllocateRegisters(const RegisterConfiguration* config,
CallDescriptor* descriptor, bool run_verifier);
CompilationInfo* info() const;
Isolate* isolate() const;
PipelineData* const data_;
};
namespace {
struct TurboCfgFile : public std::ofstream {
explicit TurboCfgFile(Isolate* isolate)
: std::ofstream(isolate->GetTurboCfgFileName().c_str(),
std::ios_base::app) {}
};
struct TurboJsonFile : public std::ofstream {
TurboJsonFile(CompilationInfo* info, std::ios_base::openmode mode)
: std::ofstream(GetVisualizerLogFileName(info, nullptr, "json").get(),
mode) {}
};
void TraceSchedule(CompilationInfo* info, Schedule* schedule) {
if (FLAG_trace_turbo) {
AllowHandleDereference allow_deref;
TurboJsonFile json_of(info, std::ios_base::app);
json_of << "{\"name\":\"Schedule\",\"type\":\"schedule\",\"data\":\"";
std::stringstream schedule_stream;
schedule_stream << *schedule;
std::string schedule_string(schedule_stream.str());
for (const auto& c : schedule_string) {
json_of << AsEscapedUC16ForJSON(c);
}
json_of << "\"},\n";
}
if (FLAG_trace_turbo_graph || FLAG_trace_turbo_scheduler) {
AllowHandleDereference allow_deref;
CodeTracer::Scope tracing_scope(info->isolate()->GetCodeTracer());
OFStream os(tracing_scope.file());
os << "-- Schedule --------------------------------------\n" << *schedule;
}
}
class SourcePositionWrapper final : public Reducer {
public:
SourcePositionWrapper(Reducer* reducer, SourcePositionTable* table)
: reducer_(reducer), table_(table) {}
~SourcePositionWrapper() final {}
const char* reducer_name() const override { return reducer_->reducer_name(); }
Reduction Reduce(Node* node) final {
SourcePosition const pos = table_->GetSourcePosition(node);
SourcePositionTable::Scope position(table_, pos);
return reducer_->Reduce(node);
}
void Finalize() final { reducer_->Finalize(); }
private:
Reducer* const reducer_;
SourcePositionTable* const table_;
DISALLOW_COPY_AND_ASSIGN(SourcePositionWrapper);
};
class JSGraphReducer final : public GraphReducer {
public:
JSGraphReducer(JSGraph* jsgraph, Zone* zone)
: GraphReducer(zone, jsgraph->graph(), jsgraph->Dead()) {}
~JSGraphReducer() final {}
};
void AddReducer(PipelineData* data, GraphReducer* graph_reducer,
Reducer* reducer) {
if (data->info()->is_source_positions_enabled()) {
void* const buffer = data->graph_zone()->New(sizeof(SourcePositionWrapper));
SourcePositionWrapper* const wrapper =
new (buffer) SourcePositionWrapper(reducer, data->source_positions());
graph_reducer->AddReducer(wrapper);
} else {
graph_reducer->AddReducer(reducer);
}
}
class PipelineRunScope {
public:
PipelineRunScope(PipelineData* data, const char* phase_name)
: phase_scope_(
phase_name == nullptr ? nullptr : data->pipeline_statistics(),
phase_name),
zone_scope_(data->zone_stats(), ZONE_NAME) {}
Zone* zone() { return zone_scope_.zone(); }
private:
PhaseScope phase_scope_;
ZoneStats::Scope zone_scope_;
};
PipelineStatistics* CreatePipelineStatistics(Handle<Script> script,
CompilationInfo* info,
ZoneStats* zone_stats) {
PipelineStatistics* pipeline_statistics = nullptr;
if (FLAG_turbo_stats || FLAG_turbo_stats_nvp) {
pipeline_statistics = new PipelineStatistics(info, zone_stats);
pipeline_statistics->BeginPhaseKind("initializing");
}
if (FLAG_trace_turbo) {
TurboJsonFile json_of(info, std::ios_base::trunc);
std::unique_ptr<char[]> function_name = info->GetDebugName();
int pos = info->IsStub() ? 0 : info->shared_info()->start_position();
json_of << "{\"function\":\"" << function_name.get()
<< "\", \"sourcePosition\":" << pos << ", \"source\":\"";
Isolate* isolate = info->isolate();
if (!script.is_null() && !script->source()->IsUndefined(isolate)) {
DisallowHeapAllocation no_allocation;
int start = info->shared_info()->start_position();
int len = info->shared_info()->end_position() - start;
String::SubStringRange source(String::cast(script->source()), start, len);
for (const auto& c : source) {
json_of << AsEscapedUC16ForJSON(c);
}
}
json_of << "\",\n\"phases\":[";
}
return pipeline_statistics;
}
} // namespace
class PipelineCompilationJob final : public CompilationJob {
public:
PipelineCompilationJob(ParseInfo* parse_info,
Handle<SharedFunctionInfo> shared_info,
Handle<JSFunction> function)
// Note that the CompilationInfo is not initialized at the time we pass it
// to the CompilationJob constructor, but it is not dereferenced there.
: CompilationJob(function->GetIsolate(), parse_info, &compilation_info_,
"TurboFan"),
parse_info_(parse_info),
zone_stats_(function->GetIsolate()->allocator()),
compilation_info_(parse_info_.get()->zone(), function->GetIsolate(),
shared_info, function),
pipeline_statistics_(CreatePipelineStatistics(
parse_info_->script(), compilation_info(), &zone_stats_)),
data_(&zone_stats_, compilation_info(), pipeline_statistics_.get()),
pipeline_(&data_),
linkage_(nullptr) {}
protected:
Status PrepareJobImpl() final;
Status ExecuteJobImpl() final;
Status FinalizeJobImpl() final;
// Registers weak object to optimized code dependencies.
void RegisterWeakObjectsInOptimizedCode(Handle<Code> code);
private:
std::unique_ptr<ParseInfo> parse_info_;
ZoneStats zone_stats_;
CompilationInfo compilation_info_;
std::unique_ptr<PipelineStatistics> pipeline_statistics_;
PipelineData data_;
PipelineImpl pipeline_;
Linkage* linkage_;
DISALLOW_COPY_AND_ASSIGN(PipelineCompilationJob);
};
PipelineCompilationJob::Status PipelineCompilationJob::PrepareJobImpl() {
if (!FLAG_always_opt) {
compilation_info()->MarkAsBailoutOnUninitialized();
}
if (FLAG_turbo_loop_peeling) {
compilation_info()->MarkAsLoopPeelingEnabled();
}
if (FLAG_turbo_inlining) {
compilation_info()->MarkAsInliningEnabled();
}
if (FLAG_inline_accessors) {
compilation_info()->MarkAsAccessorInliningEnabled();
}
if (compilation_info()->closure()->feedback_vector_cell()->map() ==
isolate()->heap()->one_closure_cell_map()) {
compilation_info()->MarkAsFunctionContextSpecializing();
}
data_.set_start_source_position(
compilation_info()->shared_info()->start_position());
linkage_ = new (compilation_info()->zone()) Linkage(
Linkage::ComputeIncoming(compilation_info()->zone(), compilation_info()));
if (!pipeline_.CreateGraph()) {
if (isolate()->has_pending_exception()) return FAILED; // Stack overflowed.
return AbortOptimization(kGraphBuildingFailed);
}
if (compilation_info()->is_osr()) data_.InitializeOsrHelper();
// Make sure that we have generated the maximal number of deopt entries.
// This is in order to avoid triggering the generation of deopt entries later
// during code assembly.
Deoptimizer::EnsureCodeForMaxDeoptimizationEntries(isolate());
return SUCCEEDED;
}
PipelineCompilationJob::Status PipelineCompilationJob::ExecuteJobImpl() {
if (!pipeline_.OptimizeGraph(linkage_)) return FAILED;
pipeline_.AssembleCode(linkage_);
return SUCCEEDED;
}
PipelineCompilationJob::Status PipelineCompilationJob::FinalizeJobImpl() {
Handle<Code> code = pipeline_.FinalizeCode();
if (code.is_null()) {
if (compilation_info()->bailout_reason() == kNoReason) {
return AbortOptimization(kCodeGenerationFailed);
}
return FAILED;
}
compilation_info()->dependencies()->Commit(code);
compilation_info()->SetCode(code);
compilation_info()->context()->native_context()->AddOptimizedCode(*code);
RegisterWeakObjectsInOptimizedCode(code);
return SUCCEEDED;
}
namespace {
void AddWeakObjectToCodeDependency(Isolate* isolate, Handle<HeapObject> object,
Handle<Code> code) {
Handle<WeakCell> cell = Code::WeakCellFor(code);
Heap* heap = isolate->heap();
if (heap->InNewSpace(*object)) {
heap->AddWeakNewSpaceObjectToCodeDependency(object, cell);
} else {
Handle<DependentCode> dep(heap->LookupWeakObjectToCodeDependency(object));
dep =
DependentCode::InsertWeakCode(dep, DependentCode::kWeakCodeGroup, cell);
heap->AddWeakObjectToCodeDependency(object, dep);
}
}
} // namespace
void PipelineCompilationJob::RegisterWeakObjectsInOptimizedCode(
Handle<Code> code) {
DCHECK(code->is_optimized_code());
std::vector<Handle<Map>> maps;
std::vector<Handle<HeapObject>> objects;
{
DisallowHeapAllocation no_gc;
int const mode_mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
RelocInfo::Mode mode = it.rinfo()->rmode();
if (mode == RelocInfo::EMBEDDED_OBJECT &&
code->IsWeakObjectInOptimizedCode(it.rinfo()->target_object())) {
Handle<HeapObject> object(HeapObject::cast(it.rinfo()->target_object()),
isolate());
if (object->IsMap()) {
maps.push_back(Handle<Map>::cast(object));
} else {
objects.push_back(object);
}
}
}
}
for (Handle<Map> map : maps) {
if (map->dependent_code()->IsEmpty(DependentCode::kWeakCodeGroup)) {
isolate()->heap()->AddRetainedMap(map);
}
Map::AddDependentCode(map, DependentCode::kWeakCodeGroup, code);
}
for (Handle<HeapObject> object : objects) {
AddWeakObjectToCodeDependency(isolate(), object, code);
}
code->set_can_have_weak_objects(true);
}
class PipelineWasmCompilationJob final : public CompilationJob {
public:
explicit PipelineWasmCompilationJob(
CompilationInfo* info, JSGraph* jsgraph, CallDescriptor* descriptor,
SourcePositionTable* source_positions,
ZoneVector<trap_handler::ProtectedInstructionData>* protected_insts,
wasm::ModuleOrigin wasm_origin)
: CompilationJob(info->isolate(), nullptr, info, "TurboFan",
State::kReadyToExecute),
zone_stats_(info->isolate()->allocator()),
pipeline_statistics_(CreatePipelineStatistics(Handle<Script>::null(),
info, &zone_stats_)),
data_(&zone_stats_, info, jsgraph, pipeline_statistics_.get(),
source_positions, protected_insts),
pipeline_(&data_),
linkage_(descriptor),
wasm_origin_(wasm_origin) {}
protected:
Status PrepareJobImpl() final;
Status ExecuteJobImpl() final;
Status FinalizeJobImpl() final;
private:
size_t AllocatedMemory() const override;
// Temporary regression check while we get the wasm code off the GC heap, and
// until we decontextualize wasm code.
// We expect the only embedded objects to be: CEntryStub, undefined, and
// the various builtins for throwing exceptions like OOB.
void ValidateImmovableEmbeddedObjects() const;
ZoneStats zone_stats_;
std::unique_ptr<PipelineStatistics> pipeline_statistics_;
PipelineData data_;
PipelineImpl pipeline_;
Linkage linkage_;
wasm::ModuleOrigin wasm_origin_;
};
PipelineWasmCompilationJob::Status
PipelineWasmCompilationJob::PrepareJobImpl() {
UNREACHABLE(); // Prepare should always be skipped for WasmCompilationJob.
return SUCCEEDED;
}
PipelineWasmCompilationJob::Status
PipelineWasmCompilationJob::ExecuteJobImpl() {
if (FLAG_trace_turbo) {
TurboJsonFile json_of(compilation_info(), std::ios_base::trunc);
json_of << "{\"function\":\"" << compilation_info()->GetDebugName().get()
<< "\", \"source\":\"\",\n\"phases\":[";
}
pipeline_.RunPrintAndVerify("Machine", true);
if (FLAG_wasm_opt || wasm_origin_ == wasm::ModuleOrigin::kAsmJsOrigin) {
PipelineData* data = &data_;
PipelineRunScope scope(data, "Wasm optimization");
JSGraphReducer graph_reducer(data->jsgraph(), scope.zone());
DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
data->common());
ValueNumberingReducer value_numbering(scope.zone(), data->graph()->zone());
MachineOperatorReducer machine_reducer(
data->jsgraph(), wasm_origin_ == wasm::ModuleOrigin::kAsmJsOrigin);
CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
data->common(), data->machine());
AddReducer(data, &graph_reducer, &dead_code_elimination);
AddReducer(data, &graph_reducer, &machine_reducer);
AddReducer(data, &graph_reducer, &common_reducer);
AddReducer(data, &graph_reducer, &value_numbering);
graph_reducer.ReduceGraph();
pipeline_.RunPrintAndVerify("Optimized Machine", true);
}
if (!pipeline_.ScheduleAndSelectInstructions(&linkage_, true)) return FAILED;
pipeline_.AssembleCode(&linkage_);
return SUCCEEDED;
}
size_t PipelineWasmCompilationJob::AllocatedMemory() const {
return pipeline_.data_->zone_stats()->GetCurrentAllocatedBytes();
}
PipelineWasmCompilationJob::Status
PipelineWasmCompilationJob::FinalizeJobImpl() {
pipeline_.FinalizeCode();
ValidateImmovableEmbeddedObjects();
return SUCCEEDED;
}
void PipelineWasmCompilationJob::ValidateImmovableEmbeddedObjects() const {
#if !DEBUG
return;
#endif
// We expect the only embedded objects to be those originating from
// a snapshot, which are immovable.
DisallowHeapAllocation no_gc;
Handle<Code> result = pipeline_.data_->code();
if (result.is_null()) return;
// TODO(aseemgarg): remove this restriction when
// wasm-to-js is also internally immovable to include WASM_TO_JS
if (result->kind() != Code::WASM_FUNCTION) return;
static const int kAllGCRefs = (1 << (RelocInfo::LAST_GCED_ENUM + 1)) - 1;
for (RelocIterator it(*result, kAllGCRefs); !it.done(); it.next()) {
RelocInfo::Mode mode = it.rinfo()->rmode();
Object* target = nullptr;
switch (mode) {
case RelocInfo::CODE_TARGET:
// this would be either one of the stubs or builtins, because
// we didn't link yet.
target = reinterpret_cast<Object*>(it.rinfo()->target_address());
break;
case RelocInfo::EMBEDDED_OBJECT:
target = it.rinfo()->target_object();
break;
default:
UNREACHABLE();
}
CHECK_NOT_NULL(target);
bool is_immovable =
target->IsSmi() || Heap::IsImmovable(HeapObject::cast(target));
CHECK(is_immovable);
}
}
template <typename Phase>
void PipelineImpl::Run() {
PipelineRunScope scope(this->data_, Phase::phase_name());
Phase phase;
phase.Run(this->data_, scope.zone());
}
template <typename Phase, typename Arg0>
void PipelineImpl::Run(Arg0 arg_0) {
PipelineRunScope scope(this->data_, Phase::phase_name());
Phase phase;
phase.Run(this->data_, scope.zone(), arg_0);
}
template <typename Phase, typename Arg0, typename Arg1>
void PipelineImpl::Run(Arg0 arg_0, Arg1 arg_1) {
PipelineRunScope scope(this->data_, Phase::phase_name());
Phase phase;
phase.Run(this->data_, scope.zone(), arg_0, arg_1);
}
struct GraphBuilderPhase {
static const char* phase_name() { return "graph builder"; }
void Run(PipelineData* data, Zone* temp_zone) {
JSTypeHintLowering::Flags flags = JSTypeHintLowering::kNoFlags;
if (data->info()->is_bailout_on_uninitialized()) {
flags |= JSTypeHintLowering::kBailoutOnUninitialized;
}
BytecodeGraphBuilder graph_builder(
temp_zone, data->info()->shared_info(),
handle(data->info()->closure()->feedback_vector()),
data->info()->osr_offset(), data->jsgraph(), CallFrequency(1.0f),
data->source_positions(), data->native_context(),
SourcePosition::kNotInlined, flags);
graph_builder.CreateGraph();
}
};
namespace {
Maybe<OuterContext> GetModuleContext(Handle<JSFunction> closure) {
Context* current = closure->context();
size_t distance = 0;
while (!current->IsNativeContext()) {
if (current->IsModuleContext()) {
return Just(OuterContext(handle(current), distance));
}
current = current->previous();
distance++;
}
return Nothing<OuterContext>();
}
Maybe<OuterContext> ChooseSpecializationContext(CompilationInfo* info) {
if (info->is_function_context_specializing()) {
DCHECK(info->has_context());
return Just(OuterContext(handle(info->context()), 0));
}
return GetModuleContext(info->closure());
}
} // anonymous namespace
struct InliningPhase {
static const char* phase_name() { return "inlining"; }
void Run(PipelineData* data, Zone* temp_zone) {
JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
data->common());
CheckpointElimination checkpoint_elimination(&graph_reducer);
CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
data->common(), data->machine());
JSCallReducer call_reducer(&graph_reducer, data->jsgraph(),
data->info()->is_bailout_on_uninitialized()
? JSCallReducer::kBailoutOnUninitialized
: JSCallReducer::kNoFlags,
data->native_context(),
data->info()->dependencies());
JSContextSpecialization context_specialization(
&graph_reducer, data->jsgraph(),
ChooseSpecializationContext(data->info()),
data->info()->is_function_context_specializing()
? data->info()->closure()
: MaybeHandle<JSFunction>());
JSNativeContextSpecialization::Flags flags =
JSNativeContextSpecialization::kNoFlags;
if (data->info()->is_accessor_inlining_enabled()) {
flags |= JSNativeContextSpecialization::kAccessorInliningEnabled;
}
if (data->info()->is_bailout_on_uninitialized()) {
flags |= JSNativeContextSpecialization::kBailoutOnUninitialized;
}
JSNativeContextSpecialization native_context_specialization(
&graph_reducer, data->jsgraph(), flags, data->native_context(),
data->info()->dependencies(), temp_zone);
JSInliningHeuristic inlining(
&graph_reducer, data->info()->is_inlining_enabled()
? JSInliningHeuristic::kGeneralInlining
: JSInliningHeuristic::kRestrictedInlining,
temp_zone, data->info(), data->jsgraph(), data->source_positions());
JSIntrinsicLowering intrinsic_lowering(&graph_reducer, data->jsgraph());
AddReducer(data, &graph_reducer, &dead_code_elimination);
AddReducer(data, &graph_reducer, &checkpoint_elimination);
AddReducer(data, &graph_reducer, &common_reducer);
AddReducer(data, &graph_reducer, &native_context_specialization);
AddReducer(data, &graph_reducer, &context_specialization);
AddReducer(data, &graph_reducer, &intrinsic_lowering);
AddReducer(data, &graph_reducer, &call_reducer);
AddReducer(data, &graph_reducer, &inlining);
graph_reducer.ReduceGraph();
}
};
struct TyperPhase {
static const char* phase_name() { return "typer"; }
void Run(PipelineData* data, Zone* temp_zone, Typer* typer) {
NodeVector roots(temp_zone);
data->jsgraph()->GetCachedNodes(&roots);
LoopVariableOptimizer induction_vars(data->jsgraph()->graph(),
data->common(), temp_zone);
if (FLAG_turbo_loop_variable) induction_vars.Run();
typer->Run(roots, &induction_vars);
}
};
struct UntyperPhase {
static const char* phase_name() { return "untyper"; }
void Run(PipelineData* data, Zone* temp_zone) {
class RemoveTypeReducer final : public Reducer {
public:
const char* reducer_name() const override { return "RemoveTypeReducer"; }
Reduction Reduce(Node* node) final {
if (NodeProperties::IsTyped(node)) {
NodeProperties::RemoveType(node);
return Changed(node);
}
return NoChange();
}
};
NodeVector roots(temp_zone);
data->jsgraph()->GetCachedNodes(&roots);
for (Node* node : roots) {
NodeProperties::RemoveType(node);
}
JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
RemoveTypeReducer remove_type_reducer;
AddReducer(data, &graph_reducer, &remove_type_reducer);
graph_reducer.ReduceGraph();
}
};
struct TypedLoweringPhase {
static const char* phase_name() { return "typed lowering"; }
void Run(PipelineData* data, Zone* temp_zone) {
JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
data->common());
JSBuiltinReducer builtin_reducer(
&graph_reducer, data->jsgraph(),
data->info()->dependencies(), data->native_context());
JSCreateLowering create_lowering(
&graph_reducer, data->info()->dependencies(), data->jsgraph(),
data->native_context(), temp_zone);
JSTypedLowering typed_lowering(&graph_reducer, data->jsgraph(), temp_zone);
TypedOptimization typed_optimization(
&graph_reducer, data->info()->dependencies(), data->jsgraph());
SimplifiedOperatorReducer simple_reducer(&graph_reducer, data->jsgraph());
CheckpointElimination checkpoint_elimination(&graph_reducer);
CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
data->common(), data->machine());
AddReducer(data, &graph_reducer, &dead_code_elimination);
AddReducer(data, &graph_reducer, &builtin_reducer);
AddReducer(data, &graph_reducer, &create_lowering);
AddReducer(data, &graph_reducer, &typed_optimization);
AddReducer(data, &graph_reducer, &typed_lowering);
AddReducer(data, &graph_reducer, &simple_reducer);
AddReducer(data, &graph_reducer, &checkpoint_elimination);
AddReducer(data, &graph_reducer, &common_reducer);
graph_reducer.ReduceGraph();
}
};
struct EscapeAnalysisPhase {
static const char* phase_name() { return "escape analysis"; }
void Run(PipelineData* data, Zone* temp_zone) {
EscapeAnalysis escape_analysis(data->jsgraph(), temp_zone);
escape_analysis.ReduceGraph();
JSGraphReducer reducer(data->jsgraph(), temp_zone);
EscapeAnalysisReducer escape_reducer(&reducer, data->jsgraph(),
escape_analysis.analysis_result(),
temp_zone);
AddReducer(data, &reducer, &escape_reducer);
reducer.ReduceGraph();
// TODO(tebbi): Turn this into a debug mode check once we have confidence.
escape_reducer.VerifyReplacement();
}
};
struct SimplifiedLoweringPhase {
static const char* phase_name() { return "simplified lowering"; }
void Run(PipelineData* data, Zone* temp_zone) {
SimplifiedLowering lowering(data->jsgraph(), temp_zone,
data->source_positions());
lowering.LowerAllNodes();
}
};
struct LoopPeelingPhase {
static const char* phase_name() { return "loop peeling"; }
void Run(PipelineData* data, Zone* temp_zone) {
GraphTrimmer trimmer(temp_zone, data->graph());
NodeVector roots(temp_zone);
data->jsgraph()->GetCachedNodes(&roots);
trimmer.TrimGraph(roots.begin(), roots.end());
LoopTree* loop_tree =
LoopFinder::BuildLoopTree(data->jsgraph()->graph(), temp_zone);
LoopPeeler::PeelInnerLoopsOfTree(data->graph(), data->common(), loop_tree,
temp_zone);
}
};
struct LoopExitEliminationPhase {
static const char* phase_name() { return "loop exit elimination"; }
void Run(PipelineData* data, Zone* temp_zone) {
LoopPeeler::EliminateLoopExits(data->graph(), temp_zone);
}
};
struct ConcurrentOptimizationPrepPhase {
static const char* phase_name() { return "concurrency preparation"; }
void Run(PipelineData* data, Zone* temp_zone) {
// Make sure we cache these code stubs.
data->jsgraph()->CEntryStubConstant(1);
data->jsgraph()->CEntryStubConstant(2);
data->jsgraph()->CEntryStubConstant(3);
// TODO(turbofan): Remove this line once the Array constructor code
// is a proper builtin and no longer a CodeStub.
data->jsgraph()->ArrayConstructorStubConstant();
// This is needed for escape analysis.
NodeProperties::SetType(data->jsgraph()->FalseConstant(), Type::Boolean());
NodeProperties::SetType(data->jsgraph()->TrueConstant(), Type::Boolean());
}
};
struct GenericLoweringPhase {
static const char* phase_name() { return "generic lowering"; }
void Run(PipelineData* data, Zone* temp_zone) {
JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
JSGenericLowering generic_lowering(data->jsgraph());
AddReducer(data, &graph_reducer, &generic_lowering);
graph_reducer.ReduceGraph();
}
};
struct EarlyOptimizationPhase {
static const char* phase_name() { return "early optimization"; }
void Run(PipelineData* data, Zone* temp_zone) {
JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
data->common());
SimplifiedOperatorReducer simple_reducer(&graph_reducer, data->jsgraph());
RedundancyElimination redundancy_elimination(&graph_reducer, temp_zone);
ValueNumberingReducer value_numbering(temp_zone, data->graph()->zone());
MachineOperatorReducer machine_reducer(data->jsgraph());
CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
data->common(), data->machine());
AddReducer(data, &graph_reducer, &dead_code_elimination);
AddReducer(data, &graph_reducer, &simple_reducer);
AddReducer(data, &graph_reducer, &redundancy_elimination);
AddReducer(data, &graph_reducer, &machine_reducer);
AddReducer(data, &graph_reducer, &common_reducer);
AddReducer(data, &graph_reducer, &value_numbering);
graph_reducer.ReduceGraph();
}
};
struct ControlFlowOptimizationPhase {
static const char* phase_name() { return "control flow optimization"; }
void Run(PipelineData* data, Zone* temp_zone) {
ControlFlowOptimizer optimizer(data->graph(), data->common(),
data->machine(), temp_zone);
optimizer.Optimize();
}
};
struct EffectControlLinearizationPhase {
static const char* phase_name() { return "effect linearization"; }
void Run(PipelineData* data, Zone* temp_zone) {
// The scheduler requires the graphs to be trimmed, so trim now.
// TODO(jarin) Remove the trimming once the scheduler can handle untrimmed
// graphs.
GraphTrimmer trimmer(temp_zone, data->graph());
NodeVector roots(temp_zone);
data->jsgraph()->GetCachedNodes(&roots);
trimmer.TrimGraph(roots.begin(), roots.end());
// Schedule the graph without node splitting so that we can
// fix the effect and control flow for nodes with low-level side
// effects (such as changing representation to tagged or
// 'floating' allocation regions.)
Schedule* schedule = Scheduler::ComputeSchedule(temp_zone, data->graph(),
Scheduler::kTempSchedule);
if (FLAG_turbo_verify) ScheduleVerifier::Run(schedule);
TraceSchedule(data->info(), schedule);
// Post-pass for wiring the control/effects
// - connect allocating representation changes into the control&effect
// chains and lower them,
// - get rid of the region markers,
// - introduce effect phis and rewire effects to get SSA again.
EffectControlLinearizer linearizer(data->jsgraph(), schedule, temp_zone,
data->source_positions());
linearizer.Run();
}
};
// The store-store elimination greatly benefits from doing a common operator
// reducer and dead code elimination just before it, to eliminate conditional
// deopts with a constant condition.
struct DeadCodeEliminationPhase {
static const char* phase_name() { return "dead code elimination"; }
void Run(PipelineData* data, Zone* temp_zone) {
JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
data->common());
CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
data->common(), data->machine());
AddReducer(data, &graph_reducer, &dead_code_elimination);
AddReducer(data, &graph_reducer, &common_reducer);
graph_reducer.ReduceGraph();
}
};
struct StoreStoreEliminationPhase {
static const char* phase_name() { return "store-store elimination"; }
void Run(PipelineData* data, Zone* temp_zone) {
GraphTrimmer trimmer(temp_zone, data->graph());
NodeVector roots(temp_zone);
data->jsgraph()->GetCachedNodes(&roots);
trimmer.TrimGraph(roots.begin(), roots.end());
StoreStoreElimination::Run(data->jsgraph(), temp_zone);
}
};
struct LoadEliminationPhase {
static const char* phase_name() { return "load elimination"; }
void Run(PipelineData* data, Zone* temp_zone) {
JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
BranchElimination branch_condition_elimination(&graph_reducer,
data->jsgraph(), temp_zone);
DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
data->common());
RedundancyElimination redundancy_elimination(&graph_reducer, temp_zone);
LoadElimination load_elimination(&graph_reducer, data->jsgraph(),
temp_zone);
CheckpointElimination checkpoint_elimination(&graph_reducer);
ValueNumberingReducer value_numbering(temp_zone, data->graph()->zone());
CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
data->common(), data->machine());
AddReducer(data, &graph_reducer, &branch_condition_elimination);
AddReducer(data, &graph_reducer, &dead_code_elimination);
AddReducer(data, &graph_reducer, &redundancy_elimination);
AddReducer(data, &graph_reducer, &load_elimination);
AddReducer(data, &graph_reducer, &checkpoint_elimination);
AddReducer(data, &graph_reducer, &common_reducer);
AddReducer(data, &graph_reducer, &value_numbering);
graph_reducer.ReduceGraph();
}
};
struct MemoryOptimizationPhase {
static const char* phase_name() { return "memory optimization"; }
void Run(PipelineData* data, Zone* temp_zone) {
// The memory optimizer requires the graphs to be trimmed, so trim now.
GraphTrimmer trimmer(temp_zone, data->graph());
NodeVector roots(temp_zone);
data->jsgraph()->GetCachedNodes(&roots);
trimmer.TrimGraph(roots.begin(), roots.end());
// Optimize allocations and load/store operations.
MemoryOptimizer optimizer(data->jsgraph(), temp_zone);
optimizer.Optimize();
}
};
struct LateOptimizationPhase {
static const char* phase_name() { return "late optimization"; }
void Run(PipelineData* data, Zone* temp_zone) {
JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
BranchElimination branch_condition_elimination(&graph_reducer,
data->jsgraph(), temp_zone);
DeadCodeElimination dead_code_elimination(&graph_reducer, data->graph(),
data->common());
ValueNumberingReducer value_numbering(temp_zone, data->graph()->zone());
MachineOperatorReducer machine_reducer(data->jsgraph());
CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
data->common(), data->machine());
SelectLowering select_lowering(data->jsgraph()->graph(),
data->jsgraph()->common());
AddReducer(data, &graph_reducer, &branch_condition_elimination);
AddReducer(data, &graph_reducer, &dead_code_elimination);
AddReducer(data, &graph_reducer, &machine_reducer);
AddReducer(data, &graph_reducer, &common_reducer);
AddReducer(data, &graph_reducer, &select_lowering);
AddReducer(data, &graph_reducer, &value_numbering);
graph_reducer.ReduceGraph();
}
};
struct EarlyGraphTrimmingPhase {
static const char* phase_name() { return "early graph trimming"; }
void Run(PipelineData* data, Zone* temp_zone) {
GraphTrimmer trimmer(temp_zone, data->graph());
NodeVector roots(temp_zone);
data->jsgraph()->GetCachedNodes(&roots);
trimmer.TrimGraph(roots.begin(), roots.end());
}
};
struct LateGraphTrimmingPhase {
static const char* phase_name() { return "late graph trimming"; }
void Run(PipelineData* data, Zone* temp_zone) {
GraphTrimmer trimmer(temp_zone, data->graph());
NodeVector roots(temp_zone);
if (data->jsgraph()) {
data->jsgraph()->GetCachedNodes(&roots);
}
trimmer.TrimGraph(roots.begin(), roots.end());
}
};
struct ComputeSchedulePhase {
static const char* phase_name() { return "scheduling"; }
void Run(PipelineData* data, Zone* temp_zone) {
Schedule* schedule = Scheduler::ComputeSchedule(
temp_zone, data->graph(), data->info()->is_splitting_enabled()
? Scheduler::kSplitNodes
: Scheduler::kNoFlags);
if (FLAG_turbo_verify) ScheduleVerifier::Run(schedule);
data->set_schedule(schedule);
}
};
struct InstructionSelectionPhase {
static const char* phase_name() { return "select instructions"; }
void Run(PipelineData* data, Zone* temp_zone, Linkage* linkage) {
InstructionSelector selector(
temp_zone, data->graph()->NodeCount(), linkage, data->sequence(),
data->schedule(), data->source_positions(), data->frame(),
data->info()->is_source_positions_enabled()
? InstructionSelector::kAllSourcePositions
: InstructionSelector::kCallSourcePositions,
InstructionSelector::SupportedFeatures(),
FLAG_turbo_instruction_scheduling
? InstructionSelector::kEnableScheduling
: InstructionSelector::kDisableScheduling,
data->info()->will_serialize()
? InstructionSelector::kEnableSerialization
: InstructionSelector::kDisableSerialization);
if (!selector.SelectInstructions()) {
data->set_compilation_failed();
}
}
};
struct MeetRegisterConstraintsPhase {
static const char* phase_name() { return "meet register constraints"; }
void Run(PipelineData* data, Zone* temp_zone) {
ConstraintBuilder builder(data->register_allocation_data());
builder.MeetRegisterConstraints();
}
};
struct ResolvePhisPhase {
static const char* phase_name() { return "resolve phis"; }
void Run(PipelineData* data, Zone* temp_zone) {
ConstraintBuilder builder(data->register_allocation_data());
builder.ResolvePhis();
}
};
struct BuildLiveRangesPhase {
static const char* phase_name() { return "build live ranges"; }
void Run(PipelineData* data, Zone* temp_zone) {
LiveRangeBuilder builder(data->register_allocation_data(), temp_zone);
builder.BuildLiveRanges();
}
};
struct SplinterLiveRangesPhase {
static const char* phase_name() { return "splinter live ranges"; }
void Run(PipelineData* data, Zone* temp_zone) {
LiveRangeSeparator live_range_splinterer(data->register_allocation_data(),
temp_zone);
live_range_splinterer.Splinter();
}
};
template <typename RegAllocator>
struct AllocateGeneralRegistersPhase {
static const char* phase_name() { return "allocate general registers"; }
void Run(PipelineData* data, Zone* temp_zone) {
RegAllocator allocator(data->register_allocation_data(), GENERAL_REGISTERS,
temp_zone);
allocator.AllocateRegisters();
}
};
template <typename RegAllocator>
struct AllocateFPRegistersPhase {
static const char* phase_name() { return "allocate f.p. registers"; }
void Run(PipelineData* data, Zone* temp_zone) {
RegAllocator allocator(data->register_allocation_data(), FP_REGISTERS,
temp_zone);
allocator.AllocateRegisters();
}
};
struct MergeSplintersPhase {
static const char* phase_name() { return "merge splintered ranges"; }
void Run(PipelineData* pipeline_data, Zone* temp_zone) {
RegisterAllocationData* data = pipeline_data->register_allocation_data();
LiveRangeMerger live_range_merger(data, temp_zone);
live_range_merger.Merge();
}
};
struct LocateSpillSlotsPhase {
static const char* phase_name() { return "locate spill slots"; }
void Run(PipelineData* data, Zone* temp_zone) {
SpillSlotLocator locator(data->register_allocation_data());
locator.LocateSpillSlots();
}
};
struct AssignSpillSlotsPhase {
static const char* phase_name() { return "assign spill slots"; }
void Run(PipelineData* data, Zone* temp_zone) {
OperandAssigner assigner(data->register_allocation_data());
assigner.AssignSpillSlots();
}
};
struct CommitAssignmentPhase {
static const char* phase_name() { return "commit assignment"; }
void Run(PipelineData* data, Zone* temp_zone) {
OperandAssigner assigner(data->register_allocation_data());
assigner.CommitAssignment();
}
};
struct PopulateReferenceMapsPhase {
static const char* phase_name() { return "populate pointer maps"; }
void Run(PipelineData* data, Zone* temp_zone) {
ReferenceMapPopulator populator(data->register_allocation_data());
populator.PopulateReferenceMaps();
}
};
struct ConnectRangesPhase {
static const char* phase_name() { return "connect ranges"; }
void Run(PipelineData* data, Zone* temp_zone) {
LiveRangeConnector connector(data->register_allocation_data());
connector.ConnectRanges(temp_zone);
}
};
struct ResolveControlFlowPhase {
static const char* phase_name() { return "resolve control flow"; }
void Run(PipelineData* data, Zone* temp_zone) {
LiveRangeConnector connector(data->register_allocation_data());
connector.ResolveControlFlow(temp_zone);
}
};
struct OptimizeMovesPhase {
static const char* phase_name() { return "optimize moves"; }
void Run(PipelineData* data, Zone* temp_zone) {
MoveOptimizer move_optimizer(temp_zone, data->sequence());
move_optimizer.Run();
}
};
struct FrameElisionPhase {
static const char* phase_name() { return "frame elision"; }
void Run(PipelineData* data, Zone* temp_zone) {
FrameElider(data->sequence()).Run();
}
};
struct JumpThreadingPhase {
static const char* phase_name() { return "jump threading"; }
void Run(PipelineData* data, Zone* temp_zone, bool frame_at_start) {
ZoneVector<RpoNumber> result(temp_zone);
if (JumpThreading::ComputeForwarding(temp_zone, result, data->sequence(),
frame_at_start)) {
JumpThreading::ApplyForwarding(result, data->sequence());
}
}
};
struct AssembleCodePhase {
static const char* phase_name() { return "assemble code"; }
void Run(PipelineData* data, Zone* temp_zone) {
data->code_generator()->AssembleCode();
}
};
struct FinalizeCodePhase {
static const char* phase_name() { return "finalize code"; }
void Run(PipelineData* data, Zone* temp_zone) {
data->set_code(data->code_generator()->FinalizeCode());
}
};
struct PrintGraphPhase {
static const char* phase_name() { return nullptr; }
void Run(PipelineData* data, Zone* temp_zone, const char* phase) {
CompilationInfo* info = data->info();
Graph* graph = data->graph();
if (FLAG_trace_turbo) { // Print JSON.
AllowHandleDereference allow_deref;
TurboJsonFile json_of(info, std::ios_base::app);
json_of << "{\"name\":\"" << phase << "\",\"type\":\"graph\",\"data\":"
<< AsJSON(*graph, data->source_positions()) << "},\n";
}
if (FLAG_trace_turbo_scheduled) { // Scheduled textual output.
AccountingAllocator allocator;
Schedule* schedule = data->schedule();
if (schedule == nullptr) {
schedule = Scheduler::ComputeSchedule(temp_zone, data->graph(),
Scheduler::kNoFlags);
}
AllowHandleDereference allow_deref;
CodeTracer::Scope tracing_scope(info->isolate()->GetCodeTracer());
OFStream os(tracing_scope.file());
os << "-- Graph after " << phase << " -- " << std::endl;
os << AsScheduledGraph(schedule);
} else if (FLAG_trace_turbo_graph) { // Simple textual RPO.
AllowHandleDereference allow_deref;
CodeTracer::Scope tracing_scope(info->isolate()->GetCodeTracer());
OFStream os(tracing_scope.file());
os << "-- Graph after " << phase << " -- " << std::endl;
os << AsRPO(*graph);
}
}
};
struct VerifyGraphPhase {
static const char* phase_name() { return nullptr; }
void Run(PipelineData* data, Zone* temp_zone, const bool untyped,
bool values_only = false) {
Verifier::Run(data->graph(), !untyped ? Verifier::TYPED : Verifier::UNTYPED,
values_only ? Verifier::kValuesOnly : Verifier::kAll);
}
};
void PipelineImpl::RunPrintAndVerify(const char* phase, bool untyped) {
if (FLAG_trace_turbo || FLAG_trace_turbo_graph) {
Run<PrintGraphPhase>(phase);
}
if (FLAG_turbo_verify) {
Run<VerifyGraphPhase>(untyped);
}
}
bool PipelineImpl::CreateGraph() {
PipelineData* data = this->data_;
data->BeginPhaseKind("graph creation");
if (FLAG_trace_turbo || FLAG_trace_turbo_graph) {
CodeTracer::Scope tracing_scope(isolate()->GetCodeTracer());
OFStream os(tracing_scope.file());
os << "---------------------------------------------------\n"
<< "Begin compiling method " << info()->GetDebugName().get()
<< " using Turbofan" << std::endl;
}
if (FLAG_trace_turbo) {
TurboCfgFile tcf(isolate());
tcf << AsC1VCompilation(info());
}
data->source_positions()->AddDecorator();
Run<GraphBuilderPhase>();
RunPrintAndVerify("Initial untyped", true);
// Perform function context specialization and inlining (if enabled).
Run<InliningPhase>();
RunPrintAndVerify("Inlined", true);
// Remove dead->live edges from the graph.
Run<EarlyGraphTrimmingPhase>();
RunPrintAndVerify("Early trimmed", true);
// Run the type-sensitive lowerings and optimizations on the graph.
{
// Determine the Typer operation flags.
Typer::Flags flags = Typer::kNoFlags;
if (is_sloppy(info()->shared_info()->language_mode()) &&
info()->shared_info()->IsUserJavaScript()) {
// Sloppy mode functions always have an Object for this.
flags |= Typer::kThisIsReceiver;
}
if (IsClassConstructor(info()->shared_info()->kind())) {
// Class constructors cannot be [[Call]]ed.
flags |= Typer::kNewTargetIsReceiver;
}
// Type the graph and keep the Typer running on newly created nodes within
// this scope; the Typer is automatically unlinked from the Graph once we
// leave this scope below.
Typer typer(isolate(), flags, data->graph());
Run<TyperPhase>(&typer);
RunPrintAndVerify("Typed");
// Lower JSOperators where we can determine types.
Run<TypedLoweringPhase>();
RunPrintAndVerify("Lowered typed");
}
// Do some hacky things to prepare for the optimization phase.
// (caching handles, etc.).
Run<ConcurrentOptimizationPrepPhase>();
data->EndPhaseKind();
return true;
}
bool PipelineImpl::OptimizeGraph(Linkage* linkage) {
PipelineData* data = this->data_;
data->BeginPhaseKind("lowering");
if (data->info()->is_loop_peeling_enabled()) {
Run<LoopPeelingPhase>();
RunPrintAndVerify("Loops peeled", true);
} else {
Run<LoopExitEliminationPhase>();
RunPrintAndVerify("Loop exits eliminated", true);
}
if (FLAG_turbo_load_elimination) {
Run<LoadEliminationPhase>();
RunPrintAndVerify("Load eliminated");
}
if (FLAG_turbo_escape) {
Run<EscapeAnalysisPhase>();
if (data->compilation_failed()) {
info()->AbortOptimization(kCyclicObjectStateDetectedInEscapeAnalysis);
data->EndPhaseKind();
return false;
}
RunPrintAndVerify("Escape Analysed");
}
// Perform simplified lowering. This has to run w/o the Typer decorator,
// because we cannot compute meaningful types anyways, and the computed types
// might even conflict with the representation/truncation logic.
Run<SimplifiedLoweringPhase>();
RunPrintAndVerify("Simplified lowering", true);
// From now on it is invalid to look at types on the nodes, because the types
// on the nodes might not make sense after representation selection due to the
// way we handle truncations; if we'd want to look at types afterwards we'd
// essentially need to re-type (large portions of) the graph.
// In order to catch bugs related to type access after this point, we now
// remove the types from the nodes (currently only in Debug builds).
#ifdef DEBUG
Run<UntyperPhase>();
RunPrintAndVerify("Untyped", true);
#endif
// Run generic lowering pass.
Run<GenericLoweringPhase>();
RunPrintAndVerify("Generic lowering", true);
data->BeginPhaseKind("block building");
// Run early optimization pass.
Run<EarlyOptimizationPhase>();
RunPrintAndVerify("Early optimized", true);
Run<EffectControlLinearizationPhase>();
RunPrintAndVerify("Effect and control linearized", true);
Run<DeadCodeEliminationPhase>();
RunPrintAndVerify("Dead code elimination", true);
if (FLAG_turbo_store_elimination) {
Run<StoreStoreEliminationPhase>();
RunPrintAndVerify("Store-store elimination", true);
}
// Optimize control flow.
if (FLAG_turbo_cf_optimization) {
Run<ControlFlowOptimizationPhase>();
RunPrintAndVerify("Control flow optimized", true);
}
// Optimize memory access and allocation operations.
Run<MemoryOptimizationPhase>();
// TODO(jarin, rossberg): Remove UNTYPED once machine typing works.
RunPrintAndVerify("Memory optimized", true);
// Lower changes that have been inserted before.
Run<LateOptimizationPhase>();
// TODO(jarin, rossberg): Remove UNTYPED once machine typing works.
RunPrintAndVerify("Late optimized", true);
data->source_positions()->RemoveDecorator();
return ScheduleAndSelectInstructions(linkage, true);
}
Handle<Code> Pipeline::GenerateCodeForCodeStub(Isolate* isolate,
CallDescriptor* call_descriptor,
Graph* graph, Schedule* schedule,
Code::Kind kind,
const char* debug_name,
JumpOptimizationInfo* jump_opt) {
CompilationInfo info(CStrVector(debug_name), isolate, graph->zone(), kind);
if (isolate->serializer_enabled()) info.MarkAsSerializing();
// Construct a pipeline for scheduling and code generation.
ZoneStats zone_stats(isolate->allocator());
SourcePositionTable source_positions(graph);
PipelineData data(&zone_stats, &info, graph, schedule, &source_positions,
jump_opt);
data.set_verify_graph(FLAG_verify_csa);
std::unique_ptr<PipelineStatistics> pipeline_statistics;
if (FLAG_turbo_stats || FLAG_turbo_stats_nvp) {
pipeline_statistics.reset(new PipelineStatistics(&info, &zone_stats));
pipeline_statistics->BeginPhaseKind("stub codegen");
}
PipelineImpl pipeline(&data);
DCHECK_NOT_NULL(data.schedule());
if (FLAG_trace_turbo || FLAG_trace_turbo_graph) {
CodeTracer::Scope tracing_scope(isolate->GetCodeTracer());
OFStream os(tracing_scope.file());
os << "---------------------------------------------------\n"
<< "Begin compiling " << debug_name << " using Turbofan" << std::endl;
if (FLAG_trace_turbo) {
TurboJsonFile json_of(&info, std::ios_base::trunc);
json_of << "{\"function\":\"" << info.GetDebugName().get()
<< "\", \"source\":\"\",\n\"phases\":[";
}
pipeline.Run<PrintGraphPhase>("Machine");
}
pipeline.Run<VerifyGraphPhase>(false, true);
return pipeline.ScheduleAndGenerateCode(call_descriptor);
}
// static
Handle<Code> Pipeline::GenerateCodeForTesting(CompilationInfo* info) {
ZoneStats zone_stats(info->isolate()->allocator());
std::unique_ptr<PipelineStatistics> pipeline_statistics(
CreatePipelineStatistics(Handle<Script>::null(), info, &zone_stats));
PipelineData data(&zone_stats, info, pipeline_statistics.get());
PipelineImpl pipeline(&data);
Linkage linkage(Linkage::ComputeIncoming(data.instruction_zone(), info));
if (!pipeline.CreateGraph()) return Handle<Code>::null();
if (!pipeline.OptimizeGraph(&linkage)) return Handle<Code>::null();
pipeline.AssembleCode(&linkage);
return pipeline.FinalizeCode();
}
// static
Handle<Code> Pipeline::GenerateCodeForTesting(CompilationInfo* info,
Graph* graph,
Schedule* schedule) {
CallDescriptor* call_descriptor =
Linkage::ComputeIncoming(info->zone(), info);
return GenerateCodeForTesting(info, call_descriptor, graph, schedule);
}
// static
Handle<Code> Pipeline::GenerateCodeForTesting(
CompilationInfo* info, CallDescriptor* call_descriptor, Graph* graph,
Schedule* schedule, SourcePositionTable* source_positions) {
// Construct a pipeline for scheduling and code generation.
ZoneStats zone_stats(info->isolate()->allocator());
// TODO(wasm): Refactor code generation to check for non-existing source
// table, then remove this conditional allocation.
if (!source_positions)
source_positions = new (info->zone()) SourcePositionTable(graph);
PipelineData data(&zone_stats, info, graph, schedule, source_positions,
nullptr);
std::unique_ptr<PipelineStatistics> pipeline_statistics;
if (FLAG_turbo_stats || FLAG_turbo_stats_nvp) {
pipeline_statistics.reset(new PipelineStatistics(info, &zone_stats));
pipeline_statistics->BeginPhaseKind("test codegen");
}
PipelineImpl pipeline(&data);
if (FLAG_trace_turbo) {
TurboJsonFile json_of(info, std::ios_base::trunc);
json_of << "{\"function\":\"" << info->GetDebugName().get()
<< "\", \"source\":\"\",\n\"phases\":[";
}
// TODO(rossberg): Should this really be untyped?
pipeline.RunPrintAndVerify("Machine", true);
return pipeline.ScheduleAndGenerateCode(call_descriptor);
}
// static
CompilationJob* Pipeline::NewCompilationJob(Handle<JSFunction> function,
bool has_script) {
Handle<SharedFunctionInfo> shared = handle(function->shared());
ParseInfo* parse_info;
if (!has_script) {
parse_info = ParseInfo::AllocateWithoutScript(shared);
} else {
parse_info = new ParseInfo(shared);
}
return new PipelineCompilationJob(parse_info, shared, function);
}
// static
CompilationJob* Pipeline::NewWasmCompilationJob(
CompilationInfo* info, JSGraph* jsgraph, CallDescriptor* descriptor,
SourcePositionTable* source_positions,
ZoneVector<trap_handler::ProtectedInstructionData>* protected_instructions,
wasm::ModuleOrigin wasm_origin) {
return new PipelineWasmCompilationJob(info, jsgraph, descriptor,
source_positions,
protected_instructions, wasm_origin);
}
bool Pipeline::AllocateRegistersForTesting(const RegisterConfiguration* config,
InstructionSequence* sequence,
bool run_verifier) {
CompilationInfo info(ArrayVector("testing"), sequence->isolate(),
sequence->zone(), Code::STUB);
ZoneStats zone_stats(sequence->isolate()->allocator());
PipelineData data(&zone_stats, &info, sequence);
PipelineImpl pipeline(&data);
pipeline.data_->InitializeFrameData(nullptr);
pipeline.AllocateRegisters(config, nullptr, run_verifier);
return !data.compilation_failed();
}
bool PipelineImpl::ScheduleAndSelectInstructions(Linkage* linkage,
bool trim_graph) {
CallDescriptor* call_descriptor = linkage->GetIncomingDescriptor();
PipelineData* data = this->data_;
DCHECK_NOT_NULL(data->graph());
if (trim_graph) {
Run<LateGraphTrimmingPhase>();
RunPrintAndVerify("Late trimmed", true);
}
if (data->schedule() == nullptr) Run<ComputeSchedulePhase>();
TraceSchedule(data->info(), data->schedule());
if (FLAG_turbo_profiling) {
data->set_profiler_data(BasicBlockInstrumentor::Instrument(
info(), data->graph(), data->schedule()));
}
bool verify_stub_graph = data->verify_graph();
// Jump optimization runs instruction selection twice, but the instruction
// selector mutates nodes like swapping the inputs of a load, which can
// violate the machine graph verification rules. So we skip the second
// verification on a graph that already verified before.
auto jump_opt = data->jump_optimization_info();
if (jump_opt && jump_opt->is_optimizing()) {
verify_stub_graph = false;
}
if (verify_stub_graph ||
(FLAG_turbo_verify_machine_graph != nullptr &&
(!strcmp(FLAG_turbo_verify_machine_graph, "*") ||
!strcmp(FLAG_turbo_verify_machine_graph, data->debug_name())))) {
if (FLAG_trace_verify_csa) {
AllowHandleDereference allow_deref;
CompilationInfo* info = data->info();
CodeTracer::Scope tracing_scope(info->isolate()->GetCodeTracer());
OFStream os(tracing_scope.file());
os << "--------------------------------------------------\n"
<< "--- Verifying " << data->debug_name() << " generated by TurboFan\n"
<< "--------------------------------------------------\n"
<< *data->schedule()
<< "--------------------------------------------------\n"
<< "--- End of " << data->debug_name() << " generated by TurboFan\n"
<< "--------------------------------------------------\n";
}
Zone temp_zone(data->isolate()->allocator(), ZONE_NAME);
MachineGraphVerifier::Run(data->graph(), data->schedule(), linkage,
data->info()->IsStub(), data->debug_name(),
&temp_zone);
}
data->InitializeInstructionSequence(call_descriptor);
data->InitializeFrameData(call_descriptor);
// Select and schedule instructions covering the scheduled graph.
Run<InstructionSelectionPhase>(linkage);
if (data->compilation_failed()) {
info()->AbortOptimization(kCodeGenerationFailed);
data->EndPhaseKind();
return false;
}
if (FLAG_trace_turbo && !data->MayHaveUnverifiableGraph()) {
AllowHandleDereference allow_deref;
TurboCfgFile tcf(isolate());
tcf << AsC1V("CodeGen", data->schedule(), data->source_positions(),
data->sequence());
}
if (FLAG_trace_turbo) {
std::ostringstream source_position_output;
// Output source position information before the graph is deleted.
data_->source_positions()->Print(source_position_output);
data_->set_source_position_output(source_position_output.str());
}
data->DeleteGraphZone();
data->BeginPhaseKind("register allocation");
bool run_verifier = FLAG_turbo_verify_allocation;
// Allocate registers.
if (call_descriptor->HasRestrictedAllocatableRegisters()) {
auto registers = call_descriptor->AllocatableRegisters();
DCHECK_LT(0, NumRegs(registers));
std::unique_ptr<const RegisterConfiguration> config;
config.reset(RegisterConfiguration::RestrictGeneralRegisters(registers));
AllocateRegisters(config.get(), call_descriptor, run_verifier);
} else {
AllocateRegisters(RegisterConfiguration::Default(), call_descriptor,
run_verifier);
}
Run<FrameElisionPhase>();
if (data->compilation_failed()) {
info()->AbortOptimization(kNotEnoughVirtualRegistersRegalloc);
data->EndPhaseKind();
return false;
}
// TODO(mtrofin): move this off to the register allocator.
bool generate_frame_at_start =
data_->sequence()->instruction_blocks().front()->must_construct_frame();
// Optimimize jumps.
if (FLAG_turbo_jt) {
Run<JumpThreadingPhase>(generate_frame_at_start);
}
data->EndPhaseKind();
return true;
}
void PipelineImpl::AssembleCode(Linkage* linkage) {
PipelineData* data = this->data_;
data->BeginPhaseKind("code generation");
data->InitializeCodeGenerator(linkage);
Run<AssembleCodePhase>();
data->DeleteInstructionZone();
}
Handle<Code> PipelineImpl::FinalizeCode() {
PipelineData* data = this->data_;
Run<FinalizeCodePhase>();
Handle<Code> code = data->code();
if (data->profiler_data()) {
#if ENABLE_DISASSEMBLER
std::ostringstream os;
code->Disassemble(nullptr, os);
data->profiler_data()->SetCode(&os);
#endif
}
info()->SetCode(code);
v8::internal::CodeGenerator::PrintCode(code, info());
if (FLAG_trace_turbo) {
TurboJsonFile json_of(info(), std::ios_base::app);
json_of << "{\"name\":\"disassembly\",\"type\":\"disassembly\",\"data\":\"";
#if ENABLE_DISASSEMBLER
std::stringstream disassembly_stream;
code->Disassemble(nullptr, disassembly_stream);
std::string disassembly_string(disassembly_stream.str());
for (const auto& c : disassembly_string) {
json_of << AsEscapedUC16ForJSON(c);
}
#endif // ENABLE_DISASSEMBLER
json_of << "\"}\n],\n";
json_of << "\"nodePositions\":";
json_of << data->source_position_output();
json_of << "}";
}
if (FLAG_trace_turbo || FLAG_trace_turbo_graph) {
CodeTracer::Scope tracing_scope(isolate()->GetCodeTracer());
OFStream os(tracing_scope.file());
os << "---------------------------------------------------\n"
<< "Finished compiling method " << info()->GetDebugName().get()
<< " using Turbofan" << std::endl;
}
return code;
}
Handle<Code> PipelineImpl::ScheduleAndGenerateCode(
CallDescriptor* call_descriptor) {
Linkage linkage(call_descriptor);
// Schedule the graph, perform instruction selection and register allocation.
if (!ScheduleAndSelectInstructions(&linkage, false)) return Handle<Code>();
// Generate the final machine code.
AssembleCode(&linkage);
return FinalizeCode();
}
void PipelineImpl::AllocateRegisters(const RegisterConfiguration* config,
CallDescriptor* descriptor,
bool run_verifier) {
PipelineData* data = this->data_;
// Don't track usage for this zone in compiler stats.
std::unique_ptr<Zone> verifier_zone;
RegisterAllocatorVerifier* verifier = nullptr;
if (run_verifier) {
verifier_zone.reset(new Zone(isolate()->allocator(), ZONE_NAME));
verifier = new (verifier_zone.get()) RegisterAllocatorVerifier(
verifier_zone.get(), config, data->sequence());
}
#ifdef DEBUG
data_->sequence()->ValidateEdgeSplitForm();
data_->sequence()->ValidateDeferredBlockEntryPaths();
data_->sequence()->ValidateDeferredBlockExitPaths();
#endif
data->InitializeRegisterAllocationData(config, descriptor);
if (info()->is_osr()) data->osr_helper()->SetupFrame(data->frame());
Run<MeetRegisterConstraintsPhase>();
Run<ResolvePhisPhase>();
Run<BuildLiveRangesPhase>();
if (FLAG_trace_turbo_graph) {
AllowHandleDereference allow_deref;
CodeTracer::Scope tracing_scope(isolate()->GetCodeTracer());
OFStream os(tracing_scope.file());
os << "----- Instruction sequence before register allocation -----\n"
<< PrintableInstructionSequence({config, data->sequence()});
}
if (verifier != nullptr) {
CHECK(!data->register_allocation_data()->ExistsUseWithoutDefinition());
CHECK(data->register_allocation_data()
->RangesDefinedInDeferredStayInDeferred());
}
if (FLAG_turbo_preprocess_ranges) {
Run<SplinterLiveRangesPhase>();
}
Run<AllocateGeneralRegistersPhase<LinearScanAllocator>>();
Run<AllocateFPRegistersPhase<LinearScanAllocator>>();
if (FLAG_turbo_preprocess_ranges) {
Run<MergeSplintersPhase>();
}
Run<AssignSpillSlotsPhase>();
Run<CommitAssignmentPhase>();
// TODO(chromium:725559): remove this check once
// we understand the cause of the bug. We keep just the
// check at the end of the allocation.
if (verifier != nullptr) {
verifier->VerifyAssignment("Immediately after CommitAssignmentPhase.");
}
Run<PopulateReferenceMapsPhase>();
Run<ConnectRangesPhase>();
Run<ResolveControlFlowPhase>();
if (FLAG_turbo_move_optimization) {
Run<OptimizeMovesPhase>();
}
Run<LocateSpillSlotsPhase>();
if (FLAG_trace_turbo_graph) {
AllowHandleDereference allow_deref;
CodeTracer::Scope tracing_scope(isolate()->GetCodeTracer());
OFStream os(tracing_scope.file());
os << "----- Instruction sequence after register allocation -----\n"
<< PrintableInstructionSequence({config, data->sequence()});
}
if (verifier != nullptr) {
verifier->VerifyAssignment("End of regalloc pipeline.");
verifier->VerifyGapMoves();
}
if (FLAG_trace_turbo && !data->MayHaveUnverifiableGraph()) {
TurboCfgFile tcf(data->isolate());
tcf << AsC1VRegisterAllocationData("CodeGen",
data->register_allocation_data());
}
data->DeleteRegisterAllocationZone();
}
CompilationInfo* PipelineImpl::info() const { return data_->info(); }
Isolate* PipelineImpl::isolate() const { return info()->isolate(); }
} // namespace compiler
} // namespace internal
} // namespace v8