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[turboprop] Add tiering up support for TurboProp

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This cl adds support for tiering up in TurboProp. This cl makes
necessary changes to support tier up but doesn't tier up yet. More
specifically this cl:
1. Introduces a new flag for interrupt_budget_for_midtier and
updates code to use the correct interrupt_budget.
2. Introduces a flag turboprop_as_midtier and necessary support
to tier up. When this flag is enabled, we introduce checks for tierup
and updating interrupt budget.


Bug: v8:9684
Change-Id: I58785ce4b9de46488a22d3b4d0cebedac460a773
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2460822
Commit-Queue: Mythri Alle <mythria@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70915}
This commit is contained in:
Mythri A 2020-11-02 10:23:51 +00:00 committed by Commit Bot
parent 808a5d76dc
commit 804a612cfd
14 changed files with 108 additions and 90 deletions
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42
src/compiler/bytecode-graph-builder.cc
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@ -35,7 +35,7 @@ class BytecodeGraphBuilder {
BytecodeGraphBuilder(JSHeapBroker* broker, Zone* local_zone,
NativeContextRef const& native_context,
SharedFunctionInfoRef const& shared_info,
FeedbackVectorRef const& feedback_vector,
FeedbackCellRef const& feedback_cell,
BailoutId osr_offset, JSGraph* jsgraph,
CallFrequency const& invocation_frequency,
SourcePositionTable* source_positions, int inlining_id,
@ -67,6 +67,7 @@ class BytecodeGraphBuilder {
bool native_context_independent() const {
return CodeKindIsNativeContextIndependentJSFunction(code_kind_);
}
bool is_turboprop() const { return code_kind_ == CodeKind::TURBOPROP; }
bool generate_full_feedback_collection() const {
// NCI code currently collects full feedback.
DCHECK_IMPLIES(native_context_independent(),
@ -117,8 +118,7 @@ class BytecodeGraphBuilder {
// Checks the optimization marker and potentially triggers compilation or
// installs the finished code object.
// Only relevant for specific code kinds (see
// CodeKindChecksOptimizationMarker).
// Only relevant for specific code kinds (see CodeKindCanTierUp).
void MaybeBuildTierUpCheck();
// Like bytecode, NCI code must collect call feedback to preserve proper
@ -422,6 +422,7 @@ class BytecodeGraphBuilder {
// The native context for which we optimize.
NativeContextRef const native_context_;
SharedFunctionInfoRef const shared_info_;
FeedbackCellRef const feedback_cell_;
FeedbackVectorRef const feedback_vector_;
CallFrequency const invocation_frequency_;
JSTypeHintLowering const type_hint_lowering_;
@ -987,7 +988,7 @@ BytecodeGraphBuilder::BytecodeGraphBuilder(
JSHeapBroker* broker, Zone* local_zone,
NativeContextRef const& native_context,
SharedFunctionInfoRef const& shared_info,
FeedbackVectorRef const& feedback_vector, BailoutId osr_offset,
FeedbackCellRef const& feedback_cell, BailoutId osr_offset,
JSGraph* jsgraph, CallFrequency const& invocation_frequency,
SourcePositionTable* source_positions, int inlining_id, CodeKind code_kind,
BytecodeGraphBuilderFlags flags, TickCounter* tick_counter)
@ -996,10 +997,11 @@ BytecodeGraphBuilder::BytecodeGraphBuilder(
jsgraph_(jsgraph),
native_context_(native_context),
shared_info_(shared_info),
feedback_vector_(feedback_vector),
feedback_cell_(feedback_cell),
feedback_vector_(feedback_cell.value().AsFeedbackVector()),
invocation_frequency_(invocation_frequency),
type_hint_lowering_(
broker, jsgraph, feedback_vector,
broker, jsgraph, feedback_vector_,
(flags & BytecodeGraphBuilderFlag::kBailoutOnUninitialized)
? JSTypeHintLowering::kBailoutOnUninitialized
: JSTypeHintLowering::kNoFlags),
@ -1053,6 +1055,8 @@ void BytecodeGraphBuilder::CreateFeedbackCellNode() {
DCHECK_NULL(feedback_cell_node_);
if (native_context_independent()) {
feedback_cell_node_ = BuildLoadFeedbackCell();
} else if (is_turboprop()) {
feedback_cell_node_ = jsgraph()->Constant(feedback_cell_);
}
}
@ -1116,7 +1120,10 @@ Node* BytecodeGraphBuilder::BuildLoadNativeContext() {
}
void BytecodeGraphBuilder::MaybeBuildTierUpCheck() {
if (!CodeKindChecksOptimizationMarker(code_kind())) return;
// For OSR we don't tier up, so we don't need to build this check. Also
// tiering up currently tail calls to IET which tail calls aren't supported
// with OSR. See AdjustStackPointerForTailCall.
if (!CodeKindCanTierUp(code_kind()) || osr_) return;
int parameter_count = bytecode_array().parameter_count();
Node* target = GetFunctionClosure();
@ -4092,13 +4099,13 @@ void BytecodeGraphBuilder::BuildJumpIfJSReceiver() {
}
void BytecodeGraphBuilder::BuildUpdateInterruptBudget(int delta) {
if (native_context_independent()) {
// Keep uses of this in sync with Ignition's UpdateInterruptBudget.
int delta_with_current_bytecode =
delta - bytecode_iterator().current_bytecode_size();
NewNode(simplified()->UpdateInterruptBudget(delta_with_current_bytecode),
feedback_cell_node());
}
if (!CodeKindCanTierUp(code_kind())) return;
// Keep uses of this in sync with Ignition's UpdateInterruptBudget.
int delta_with_current_bytecode =
delta - bytecode_iterator().current_bytecode_size();
NewNode(simplified()->UpdateInterruptBudget(delta_with_current_bytecode),
feedback_cell_node());
}
JSTypeHintLowering::LoweringResult
@ -4493,17 +4500,18 @@ void BytecodeGraphBuilder::UpdateSourcePosition(int offset) {
void BuildGraphFromBytecode(JSHeapBroker* broker, Zone* local_zone,
SharedFunctionInfoRef const& shared_info,
FeedbackVectorRef const& feedback_vector,
FeedbackCellRef const& feedback_cell,
BailoutId osr_offset, JSGraph* jsgraph,
CallFrequency const& invocation_frequency,
SourcePositionTable* source_positions,
int inlining_id, CodeKind code_kind,
BytecodeGraphBuilderFlags flags,
TickCounter* tick_counter) {
DCHECK(broker->IsSerializedForCompilation(shared_info, feedback_vector));
DCHECK(broker->IsSerializedForCompilation(
shared_info, feedback_cell.value().AsFeedbackVector()));
BytecodeGraphBuilder builder(
broker, local_zone, broker->target_native_context(), shared_info,
feedback_vector, osr_offset, jsgraph, invocation_frequency,
feedback_cell, osr_offset, jsgraph, invocation_frequency,
source_positions, inlining_id, code_kind, flags, tick_counter);
builder.CreateGraph();
}

2
src/compiler/bytecode-graph-builder.h
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@ -41,7 +41,7 @@ using BytecodeGraphBuilderFlags = base::Flags<BytecodeGraphBuilderFlag>;
// on AIX (v8:8193).
void BuildGraphFromBytecode(JSHeapBroker* broker, Zone* local_zone,
SharedFunctionInfoRef const& shared_info,
FeedbackVectorRef const& feedback_vector,
FeedbackCellRef const& feedback_cell,
BailoutId osr_offset, JSGraph* jsgraph,
CallFrequency const& invocation_frequency,
SourcePositionTable* source_positions,

1
src/compiler/heap-refs.h
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@ -350,6 +350,7 @@ class V8_EXPORT_PRIVATE JSFunctionRef : public JSObjectRef {
NativeContextRef native_context() const;
SharedFunctionInfoRef shared() const;
FeedbackVectorRef feedback_vector() const;
FeedbackCellRef raw_feedback_cell() const;
CodeRef code() const;
int InitialMapInstanceSizeWithMinSlack() const;
};

5
src/compiler/js-heap-broker.cc
View File

@ -664,6 +664,7 @@ class JSFunctionData : public JSObjectData {
ObjectData* initial_map() const { return initial_map_; }
ObjectData* prototype() const { return prototype_; }
ObjectData* shared() const { return shared_; }
ObjectData* raw_feedback_cell() const { return feedback_cell_; }
ObjectData* feedback_vector() const { return feedback_vector_; }
ObjectData* code() const { return code_; }
int initial_map_instance_size_with_min_slack() const {
@ -686,6 +687,7 @@ class JSFunctionData : public JSObjectData {
ObjectData* prototype_ = nullptr;
ObjectData* shared_ = nullptr;
ObjectData* feedback_vector_ = nullptr;
ObjectData* feedback_cell_ = nullptr;
ObjectData* code_ = nullptr;
int initial_map_instance_size_with_min_slack_;
};
@ -1331,12 +1333,14 @@ void JSFunctionData::Serialize(JSHeapBroker* broker) {
DCHECK_NULL(initial_map_);
DCHECK_NULL(prototype_);
DCHECK_NULL(shared_);
DCHECK_NULL(feedback_cell_);
DCHECK_NULL(feedback_vector_);
DCHECK_NULL(code_);
context_ = broker->GetOrCreateData(function->context());
native_context_ = broker->GetOrCreateData(function->native_context());
shared_ = broker->GetOrCreateData(function->shared());
feedback_cell_ = broker->GetOrCreateData(function->raw_feedback_cell());
feedback_vector_ = has_feedback_vector()
? broker->GetOrCreateData(function->feedback_vector())
: nullptr;
@ -3427,6 +3431,7 @@ BIMODAL_ACCESSOR(JSFunction, NativeContext, native_context)
BIMODAL_ACCESSOR(JSFunction, Map, initial_map)
BIMODAL_ACCESSOR(JSFunction, Object, prototype)
BIMODAL_ACCESSOR(JSFunction, SharedFunctionInfo, shared)
BIMODAL_ACCESSOR(JSFunction, FeedbackCell, raw_feedback_cell)
BIMODAL_ACCESSOR(JSFunction, FeedbackVector, feedback_vector)
BIMODAL_ACCESSOR(JSFunction, Code, code)

17
src/compiler/js-inlining.cc
View File

@ -332,8 +332,8 @@ base::Optional<SharedFunctionInfoRef> JSInliner::DetermineCallTarget(
// following static information is provided:
// - context : The context (as SSA value) bound by the call target.
// - feedback_vector : The target is guaranteed to use this feedback vector.
FeedbackVectorRef JSInliner::DetermineCallContext(Node* node,
Node** context_out) {
FeedbackCellRef JSInliner::DetermineCallContext(Node* node,
Node** context_out) {
DCHECK(IrOpcode::IsInlineeOpcode(node->opcode()));
Node* target = node->InputAt(JSCallOrConstructNode::TargetIndex());
HeapObjectMatcher match(target);
@ -345,7 +345,7 @@ FeedbackVectorRef JSInliner::DetermineCallContext(Node* node,
// The inlinee specializes to the context from the JSFunction object.
*context_out = jsgraph()->Constant(function.context());
return function.feedback_vector();
return function.raw_feedback_cell();
}
if (match.IsJSCreateClosure()) {
@ -356,7 +356,7 @@ FeedbackVectorRef JSInliner::DetermineCallContext(Node* node,
// The inlinee uses the locally provided context at instantiation.
*context_out = NodeProperties::GetContextInput(match.node());
return cell.value().AsFeedbackVector();
return cell;
} else if (match.IsCheckClosure()) {
FeedbackCellRef cell(broker(), FeedbackCellOf(match.op()));
@ -367,7 +367,7 @@ FeedbackVectorRef JSInliner::DetermineCallContext(Node* node,
match.node(), effect, control);
NodeProperties::ReplaceEffectInput(node, effect);
return cell.value().AsFeedbackVector();
return cell;
}
// Must succeed.
@ -438,8 +438,9 @@ Reduction JSInliner::ReduceJSCall(Node* node) {
: ""));
// Determine the target's feedback vector and its context.
Node* context;
FeedbackVectorRef feedback_vector = DetermineCallContext(node, &context);
CHECK(broker()->IsSerializedForCompilation(*shared_info, feedback_vector));
FeedbackCellRef feedback_cell = DetermineCallContext(node, &context);
CHECK(broker()->IsSerializedForCompilation(
*shared_info, feedback_cell.value().AsFeedbackVector()));
// ----------------------------------------------------------------
// After this point, we've made a decision to inline this function.
@ -468,7 +469,7 @@ Reduction JSInliner::ReduceJSCall(Node* node) {
}
{
CallFrequency frequency = call.frequency();
BuildGraphFromBytecode(broker(), zone(), *shared_info, feedback_vector,
BuildGraphFromBytecode(broker(), zone(), *shared_info, feedback_cell,
BailoutId::None(), jsgraph(), frequency,
source_positions_, inlining_id, info_->code_kind(),
flags, &info_->tick_counter());

2
src/compiler/js-inlining.h
View File

@ -59,7 +59,7 @@ class JSInliner final : public AdvancedReducer {
SourcePositionTable* const source_positions_;
base::Optional<SharedFunctionInfoRef> DetermineCallTarget(Node* node);
FeedbackVectorRef DetermineCallContext(Node* node, Node** context_out);
FeedbackCellRef DetermineCallContext(Node* node, Node** context_out);
Node* CreateArtificialFrameState(Node* node, Node* outer_frame_state,
int parameter_count, BailoutId bailout_id,

9
src/compiler/pipeline.cc
View File

@ -1406,10 +1406,11 @@ struct GraphBuilderPhase {
JSFunctionRef closure(data->broker(), data->info()->closure());
CallFrequency frequency(1.0f);
BuildGraphFromBytecode(
data->broker(), temp_zone, closure.shared(), closure.feedback_vector(),
data->info()->osr_offset(), data->jsgraph(), frequency,
data->source_positions(), SourcePosition::kNotInlined,
data->info()->code_kind(), flags, &data->info()->tick_counter());
data->broker(), temp_zone, closure.shared(),
closure.raw_feedback_cell(), data->info()->osr_offset(),
data->jsgraph(), frequency, data->source_positions(),
SourcePosition::kNotInlined, data->info()->code_kind(), flags,
&data->info()->tick_counter());
}
};

87
src/execution/runtime-profiler.cc
View File

@ -92,8 +92,20 @@ void TraceHeuristicOptimizationDisallowed(JSFunction function) {
}
}
// TODO(jgruber): Remove this once we include this tracing with --trace-opt.
void TraceNCIRecompile(JSFunction function, OptimizationReason reason) {
if (FLAG_trace_turbo_nci) {
StdoutStream os;
os << "NCI tierup mark: " << Brief(function) << ", "
<< OptimizationReasonToString(reason) << std::endl;
}
}
void TraceRecompile(JSFunction function, OptimizationReason reason,
Isolate* isolate) {
CodeKind code_kind, Isolate* isolate) {
if (code_kind == CodeKind::NATIVE_CONTEXT_INDEPENDENT) {
TraceNCIRecompile(function, reason);
}
if (FLAG_trace_opt) {
CodeTracer::Scope scope(isolate->GetCodeTracer());
PrintF(scope.file(), "[marking ");
@ -104,22 +116,15 @@ void TraceRecompile(JSFunction function, OptimizationReason reason,
}
}
void TraceNCIRecompile(JSFunction function, OptimizationReason reason) {
if (FLAG_trace_turbo_nci) {
StdoutStream os;
os << "NCI tierup mark: " << Brief(function) << ", "
<< OptimizationReasonToString(reason) << std::endl;
}
}
} // namespace
RuntimeProfiler::RuntimeProfiler(Isolate* isolate)
: isolate_(isolate), any_ic_changed_(false) {}
void RuntimeProfiler::Optimize(JSFunction function, OptimizationReason reason) {
void RuntimeProfiler::Optimize(JSFunction function, OptimizationReason reason,
CodeKind code_kind) {
DCHECK_NE(reason, OptimizationReason::kDoNotOptimize);
TraceRecompile(function, reason, isolate_);
TraceRecompile(function, reason, code_kind, isolate_);
function.MarkForOptimization(ConcurrencyMode::kConcurrent);
}
@ -150,12 +155,15 @@ void RuntimeProfiler::AttemptOnStackReplacement(InterpretedFrame* frame,
Min(level + loop_nesting_levels, AbstractCode::kMaxLoopNestingMarker));
}
void RuntimeProfiler::MaybeOptimizeInterpretedFrame(JSFunction function,
InterpretedFrame* frame) {
void RuntimeProfiler::MaybeOptimizeFrame(JSFunction function,
JavaScriptFrame* frame,
CodeKind code_kind) {
DCHECK(CodeKindCanTierUp(code_kind));
if (function.IsInOptimizationQueue()) {
TraceInOptimizationQueue(function);
return;
}
if (FLAG_testing_d8_test_runner &&
!PendingOptimizationTable::IsHeuristicOptimizationAllowed(isolate_,
function)) {
@ -165,46 +173,24 @@ void RuntimeProfiler::MaybeOptimizeInterpretedFrame(JSFunction function,
if (function.shared().optimization_disabled()) return;
if (FLAG_always_osr) {
AttemptOnStackReplacement(frame, AbstractCode::kMaxLoopNestingMarker);
// Fall through and do a normal optimized compile as well.
} else if (MaybeOSR(function, frame)) {
return;
}
OptimizationReason reason =
ShouldOptimize(function, function.shared().GetBytecodeArray());
if (reason != OptimizationReason::kDoNotOptimize) {
Optimize(function, reason);
}
}
void RuntimeProfiler::MaybeOptimizeNCIFrame(JSFunction function) {
DCHECK_EQ(function.code().kind(), CodeKind::NATIVE_CONTEXT_INDEPENDENT);
if (function.IsInOptimizationQueue()) {
TraceInOptimizationQueue(function);
return;
}
if (FLAG_testing_d8_test_runner &&
!PendingOptimizationTable::IsHeuristicOptimizationAllowed(isolate_,
function)) {
TraceHeuristicOptimizationDisallowed(function);
return;
}
if (function.shared().optimization_disabled()) return;
// Note: We currently do not trigger OSR compilation from NCI code.
// Note: We currently do not trigger OSR compilation from NCI or TP code.
// TODO(jgruber,v8:8888): But we should.
if (frame->is_interpreted()) {
DCHECK_EQ(code_kind, CodeKind::INTERPRETED_FUNCTION);
if (FLAG_always_osr) {
AttemptOnStackReplacement(InterpretedFrame::cast(frame),
AbstractCode::kMaxLoopNestingMarker);
// Fall through and do a normal optimized compile as well.
} else if (MaybeOSR(function, InterpretedFrame::cast(frame))) {
return;
}
}
OptimizationReason reason =
ShouldOptimize(function, function.shared().GetBytecodeArray());
if (reason != OptimizationReason::kDoNotOptimize) {
TraceNCIRecompile(function, reason);
Optimize(function, reason);
Optimize(function, reason, code_kind);
}
}
@ -297,7 +283,7 @@ void RuntimeProfiler::MarkCandidatesForOptimizationFromBytecode() {
if (!function.has_feedback_vector()) continue;
MaybeOptimizeInterpretedFrame(function, InterpretedFrame::cast(frame));
MaybeOptimizeFrame(function, frame, CodeKind::INTERPRETED_FUNCTION);
// TODO(leszeks): Move this increment to before the maybe optimize checks,
// and update the tests to assume the increment has already happened.
@ -315,7 +301,8 @@ void RuntimeProfiler::MarkCandidatesForOptimizationFromCode() {
if (!frame->is_optimized()) continue;
JSFunction function = frame->function();
if (function.code().kind() != CodeKind::NATIVE_CONTEXT_INDEPENDENT) {
auto code_kind = function.code().kind();
if (!CodeKindIsOptimizedAndCanTierUp(code_kind)) {
continue;
}
@ -324,7 +311,7 @@ void RuntimeProfiler::MarkCandidatesForOptimizationFromCode() {
function.feedback_vector().SaturatingIncrementProfilerTicks();
MaybeOptimizeNCIFrame(function);
MaybeOptimizeFrame(function, frame, code_kind);
}
}

11
src/execution/runtime-profiler.h
View File

@ -15,7 +15,9 @@ namespace internal {
class BytecodeArray;
class Isolate;
class InterpretedFrame;
class JavaScriptFrame;
class JSFunction;
enum class CodeKind;
enum class OptimizationReason : uint8_t;
class RuntimeProfiler {
@ -35,15 +37,16 @@ class RuntimeProfiler {
private:
// Make the decision whether to optimize the given function, and mark it for
// optimization if the decision was 'yes'.
void MaybeOptimizeNCIFrame(JSFunction function);
void MaybeOptimizeInterpretedFrame(JSFunction function,
InterpretedFrame* frame);
void MaybeOptimizeFrame(JSFunction function, JavaScriptFrame* frame,
CodeKind code_kind);
// Potentially attempts OSR from and returns whether no other
// optimization attempts should be made.
bool MaybeOSR(JSFunction function, InterpretedFrame* frame);
OptimizationReason ShouldOptimize(JSFunction function,
BytecodeArray bytecode_array);
void Optimize(JSFunction function, OptimizationReason reason);
void Optimize(JSFunction function, OptimizationReason reason,
CodeKind code_kind);
void Baseline(JSFunction function, OptimizationReason reason);
class MarkCandidatesForOptimizationScope final {

3
src/flags/flag-definitions.h
View File

@ -559,6 +559,9 @@ DEFINE_BOOL(turboprop_mid_tier_reg_alloc, true,
DEFINE_BOOL(turboprop_dynamic_map_checks, true,
"use dynamic map checks when generating code for property accesses "
"if all handlers in an IC are the same for turboprop")
DEFINE_BOOL(turboprop_as_midtier, false,
"enable experimental turboprop mid-tier compiler")
DEFINE_IMPLICATION(turboprop_as_midtier, turboprop)
DEFINE_NEG_IMPLICATION(turboprop, turbo_inlining)
DEFINE_IMPLICATION(turboprop, concurrent_inlining)
DEFINE_VALUE_IMPLICATION(turboprop, interrupt_budget, 15 * KB)

2
src/objects/code-inl.h
View File

@ -356,7 +356,7 @@ inline bool Code::checks_optimization_marker() const {
bool checks_marker =
(builtin_index() == Builtins::kCompileLazy ||
builtin_index() == Builtins::kInterpreterEntryTrampoline ||
CodeKindChecksOptimizationMarker(kind()));
CodeKindCanTierUp(kind()));
return checks_marker ||
(CodeKindCanDeoptimize(kind()) && marked_for_deoptimization());
}

9
src/objects/code-kind.h
View File

@ -74,9 +74,14 @@ inline constexpr bool CodeKindCanOSR(CodeKind kind) {
return kind == CodeKind::TURBOFAN || kind == CodeKind::TURBOPROP;
}
inline constexpr bool CodeKindChecksOptimizationMarker(CodeKind kind) {
inline constexpr bool CodeKindIsOptimizedAndCanTierUp(CodeKind kind) {
return kind == CodeKind::NATIVE_CONTEXT_INDEPENDENT ||
(FLAG_turboprop_as_midtier && kind == CodeKind::TURBOPROP);
}
inline constexpr bool CodeKindCanTierUp(CodeKind kind) {
return kind == CodeKind::INTERPRETED_FUNCTION ||
kind == CodeKind::NATIVE_CONTEXT_INDEPENDENT;
CodeKindIsOptimizedAndCanTierUp(kind);
}
// The optimization marker field on the feedback vector has a dual purpose of

3
src/objects/js-function-inl.h
View File

@ -71,7 +71,8 @@ void JSFunction::MarkForOptimization(ConcurrencyMode mode) {
mode = ConcurrencyMode::kNotConcurrent;
}
DCHECK(!is_compiled() || ActiveTierIsIgnition() || ActiveTierIsNCI());
DCHECK(!is_compiled() || ActiveTierIsIgnition() || ActiveTierIsNCI() ||
(ActiveTierIsTurboprop() && FLAG_turboprop_as_midtier));
DCHECK(!ActiveTierIsTurbofan());
DCHECK(shared().IsInterpreted());
DCHECK(shared().allows_lazy_compilation() ||

5
src/objects/js-function.cc
View File

@ -140,7 +140,10 @@ bool JSFunction::ActiveTierIsTurboprop() const {
CodeKind JSFunction::NextTier() const {
if (V8_UNLIKELY(FLAG_turbo_nci_as_midtier && ActiveTierIsIgnition())) {
return CodeKind::NATIVE_CONTEXT_INDEPENDENT;
} else if (V8_UNLIKELY(FLAG_turboprop)) {
} else if (V8_UNLIKELY(FLAG_turboprop_as_midtier &&
ActiveTierIsTurboprop())) {
return CodeKind::TURBOFAN;
} else if (V8_UNLIKELY(FLAG_turboprop) && ActiveTierIsIgnition()) {
return CodeKind::TURBOPROP;
}
return CodeKind::TURBOFAN;