// Copyright 2012 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_FEEDBACK_VECTOR_INL_H_
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#define V8_FEEDBACK_VECTOR_INL_H_
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#include "src/feedback-vector.h"
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#include "src/globals.h"
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#include "src/heap/factory-inl.h"
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#include "src/heap/heap-inl.h"
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#include "src/objects/maybe-object-inl.h"
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#include "src/objects/shared-function-info.h"
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// Has to be the last include (doesn't have include guards):
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#include "src/objects/object-macros.h"
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namespace v8 {
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namespace internal {
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INT32_ACCESSORS(FeedbackMetadata, slot_count, kSlotCountOffset)
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int32_t FeedbackMetadata::synchronized_slot_count() const {
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return base::Acquire_Load(reinterpret_cast<const base::Atomic32*>(
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FIELD_ADDR(this, kSlotCountOffset)));
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}
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// static
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FeedbackMetadata* FeedbackMetadata::cast(Object* obj) {
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DCHECK(obj->IsFeedbackMetadata());
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return reinterpret_cast<FeedbackMetadata*>(obj);
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}
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int32_t FeedbackMetadata::get(int index) const {
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DCHECK(index >= 0 && index < length());
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int offset = kHeaderSize + index * kInt32Size;
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return READ_INT32_FIELD(this, offset);
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}
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void FeedbackMetadata::set(int index, int32_t value) {
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DCHECK(index >= 0 && index < length());
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int offset = kHeaderSize + index * kInt32Size;
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WRITE_INT32_FIELD(this, offset, value);
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}
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bool FeedbackMetadata::is_empty() const { return slot_count() == 0; }
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int FeedbackMetadata::length() const {
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return FeedbackMetadata::length(slot_count());
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}
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// static
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FeedbackVector* FeedbackVector::cast(Object* obj) {
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DCHECK(obj->IsFeedbackVector());
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return reinterpret_cast<FeedbackVector*>(obj);
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}
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int FeedbackMetadata::GetSlotSize(FeedbackSlotKind kind) {
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switch (kind) {
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case FeedbackSlotKind::kForIn:
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case FeedbackSlotKind::kInstanceOf:
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case FeedbackSlotKind::kCompareOp:
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case FeedbackSlotKind::kBinaryOp:
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case FeedbackSlotKind::kLiteral:
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case FeedbackSlotKind::kCreateClosure:
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case FeedbackSlotKind::kTypeProfile:
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return 1;
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case FeedbackSlotKind::kCall:
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case FeedbackSlotKind::kCloneObject:
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case FeedbackSlotKind::kLoadProperty:
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case FeedbackSlotKind::kLoadGlobalInsideTypeof:
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case FeedbackSlotKind::kLoadGlobalNotInsideTypeof:
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case FeedbackSlotKind::kLoadKeyed:
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case FeedbackSlotKind::kStoreNamedSloppy:
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case FeedbackSlotKind::kStoreNamedStrict:
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case FeedbackSlotKind::kStoreOwnNamed:
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case FeedbackSlotKind::kStoreGlobalSloppy:
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case FeedbackSlotKind::kStoreGlobalStrict:
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case FeedbackSlotKind::kStoreKeyedSloppy:
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case FeedbackSlotKind::kStoreKeyedStrict:
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case FeedbackSlotKind::kStoreInArrayLiteral:
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case FeedbackSlotKind::kStoreDataPropertyInLiteral:
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return 2;
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case FeedbackSlotKind::kInvalid:
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case FeedbackSlotKind::kKindsNumber:
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UNREACHABLE();
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break;
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}
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return 1;
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}
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ACCESSORS(FeedbackVector, shared_function_info, SharedFunctionInfo,
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kSharedFunctionInfoOffset)
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WEAK_ACCESSORS(FeedbackVector, optimized_code_weak_or_smi, kOptimizedCodeOffset)
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INT32_ACCESSORS(FeedbackVector, length, kLengthOffset)
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INT32_ACCESSORS(FeedbackVector, invocation_count, kInvocationCountOffset)
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INT32_ACCESSORS(FeedbackVector, profiler_ticks, kProfilerTicksOffset)
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INT32_ACCESSORS(FeedbackVector, deopt_count, kDeoptCountOffset)
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bool FeedbackVector::is_empty() const { return length() == 0; }
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FeedbackMetadata* FeedbackVector::metadata() const {
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return shared_function_info()->feedback_metadata();
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}
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void FeedbackVector::clear_invocation_count() { set_invocation_count(0); }
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void FeedbackVector::increment_deopt_count() {
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int count = deopt_count();
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if (count < std::numeric_limits<int32_t>::max()) {
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set_deopt_count(count + 1);
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}
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}
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Code* FeedbackVector::optimized_code() const {
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MaybeObject* slot = optimized_code_weak_or_smi();
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DCHECK(slot->IsSmi() || slot->IsClearedWeakHeapObject() ||
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slot->IsWeakHeapObject());
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HeapObject* heap_object;
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return slot->ToStrongOrWeakHeapObject(&heap_object) ? Code::cast(heap_object)
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: nullptr;
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}
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OptimizationMarker FeedbackVector::optimization_marker() const {
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MaybeObject* slot = optimized_code_weak_or_smi();
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Smi* value;
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if (!slot->ToSmi(&value)) return OptimizationMarker::kNone;
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return static_cast<OptimizationMarker>(value->value());
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}
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bool FeedbackVector::has_optimized_code() const {
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return optimized_code() != nullptr;
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}
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bool FeedbackVector::has_optimization_marker() const {
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return optimization_marker() != OptimizationMarker::kLogFirstExecution &&
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optimization_marker() != OptimizationMarker::kNone;
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}
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// Conversion from an integer index to either a slot or an ic slot.
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// static
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FeedbackSlot FeedbackVector::ToSlot(int index) {
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DCHECK_GE(index, 0);
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return FeedbackSlot(index);
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}
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MaybeObject* FeedbackVector::Get(FeedbackSlot slot) const {
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return get(GetIndex(slot));
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}
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MaybeObject* FeedbackVector::get(int index) const {
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DCHECK_GE(index, 0);
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DCHECK_LT(index, this->length());
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int offset = kFeedbackSlotsOffset + index * kPointerSize;
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return RELAXED_READ_WEAK_FIELD(this, offset);
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}
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void FeedbackVector::Set(FeedbackSlot slot, MaybeObject* value,
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WriteBarrierMode mode) {
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set(GetIndex(slot), value, mode);
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}
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void FeedbackVector::set(int index, MaybeObject* value, WriteBarrierMode mode) {
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DCHECK_GE(index, 0);
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DCHECK_LT(index, this->length());
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int offset = kFeedbackSlotsOffset + index * kPointerSize;
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RELAXED_WRITE_FIELD(this, offset, value);
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CONDITIONAL_WEAK_WRITE_BARRIER(this, offset, value, mode);
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}
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void FeedbackVector::Set(FeedbackSlot slot, Object* value,
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WriteBarrierMode mode) {
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set(GetIndex(slot), MaybeObject::FromObject(value), mode);
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}
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void FeedbackVector::set(int index, Object* value, WriteBarrierMode mode) {
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set(index, MaybeObject::FromObject(value), mode);
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}
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inline MaybeObject** FeedbackVector::slots_start() {
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return HeapObject::RawMaybeWeakField(this, kFeedbackSlotsOffset);
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}
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// Helper function to transform the feedback to BinaryOperationHint.
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BinaryOperationHint BinaryOperationHintFromFeedback(int type_feedback) {
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switch (type_feedback) {
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case BinaryOperationFeedback::kNone:
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return BinaryOperationHint::kNone;
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case BinaryOperationFeedback::kSignedSmall:
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return BinaryOperationHint::kSignedSmall;
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case BinaryOperationFeedback::kSignedSmallInputs:
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return BinaryOperationHint::kSignedSmallInputs;
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case BinaryOperationFeedback::kNumber:
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return BinaryOperationHint::kNumber;
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case BinaryOperationFeedback::kNumberOrOddball:
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return BinaryOperationHint::kNumberOrOddball;
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case BinaryOperationFeedback::kString:
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return BinaryOperationHint::kString;
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case BinaryOperationFeedback::kBigInt:
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return BinaryOperationHint::kBigInt;
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default:
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return BinaryOperationHint::kAny;
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}
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UNREACHABLE();
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}
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// Helper function to transform the feedback to CompareOperationHint.
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CompareOperationHint CompareOperationHintFromFeedback(int type_feedback) {
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switch (type_feedback) {
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case CompareOperationFeedback::kNone:
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return CompareOperationHint::kNone;
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case CompareOperationFeedback::kSignedSmall:
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return CompareOperationHint::kSignedSmall;
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case CompareOperationFeedback::kNumber:
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return CompareOperationHint::kNumber;
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case CompareOperationFeedback::kNumberOrOddball:
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return CompareOperationHint::kNumberOrOddball;
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case CompareOperationFeedback::kInternalizedString:
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return CompareOperationHint::kInternalizedString;
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case CompareOperationFeedback::kString:
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return CompareOperationHint::kString;
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case CompareOperationFeedback::kSymbol:
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return CompareOperationHint::kSymbol;
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case CompareOperationFeedback::kBigInt:
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return CompareOperationHint::kBigInt;
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case CompareOperationFeedback::kReceiver:
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return CompareOperationHint::kReceiver;
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default:
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return CompareOperationHint::kAny;
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}
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UNREACHABLE();
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}
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// Helper function to transform the feedback to ForInHint.
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ForInHint ForInHintFromFeedback(int type_feedback) {
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switch (type_feedback) {
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case ForInFeedback::kNone:
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return ForInHint::kNone;
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case ForInFeedback::kEnumCacheKeys:
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return ForInHint::kEnumCacheKeys;
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case ForInFeedback::kEnumCacheKeysAndIndices:
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return ForInHint::kEnumCacheKeysAndIndices;
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default:
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return ForInHint::kAny;
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}
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UNREACHABLE();
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}
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void FeedbackVector::ComputeCounts(int* with_type_info, int* generic,
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int* vector_ic_count) {
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MaybeObject* megamorphic_sentinel = MaybeObject::FromObject(
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*FeedbackVector::MegamorphicSentinel(GetIsolate()));
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int with = 0;
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int gen = 0;
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int total = 0;
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FeedbackMetadataIterator iter(metadata());
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while (iter.HasNext()) {
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FeedbackSlot slot = iter.Next();
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FeedbackSlotKind kind = iter.kind();
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MaybeObject* const obj = Get(slot);
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AssertNoLegacyTypes(obj);
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switch (kind) {
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case FeedbackSlotKind::kCall:
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case FeedbackSlotKind::kLoadProperty:
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case FeedbackSlotKind::kLoadGlobalInsideTypeof:
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case FeedbackSlotKind::kLoadGlobalNotInsideTypeof:
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case FeedbackSlotKind::kLoadKeyed:
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case FeedbackSlotKind::kStoreNamedSloppy:
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case FeedbackSlotKind::kStoreNamedStrict:
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case FeedbackSlotKind::kStoreOwnNamed:
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case FeedbackSlotKind::kStoreGlobalSloppy:
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case FeedbackSlotKind::kStoreGlobalStrict:
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case FeedbackSlotKind::kStoreKeyedSloppy:
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case FeedbackSlotKind::kStoreKeyedStrict:
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case FeedbackSlotKind::kStoreInArrayLiteral:
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case FeedbackSlotKind::kStoreDataPropertyInLiteral:
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case FeedbackSlotKind::kTypeProfile: {
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HeapObject* heap_object;
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if (obj->IsWeakOrClearedHeapObject() ||
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(obj->ToStrongHeapObject(&heap_object) &&
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(heap_object->IsWeakFixedArray() || heap_object->IsString()))) {
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with++;
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} else if (obj == megamorphic_sentinel) {
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gen++;
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with++;
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}
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total++;
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break;
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}
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case FeedbackSlotKind::kBinaryOp: {
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int const feedback = Smi::ToInt(obj->ToSmi());
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BinaryOperationHint hint = BinaryOperationHintFromFeedback(feedback);
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if (hint == BinaryOperationHint::kAny) {
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gen++;
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}
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if (hint != BinaryOperationHint::kNone) {
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with++;
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}
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total++;
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break;
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}
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case FeedbackSlotKind::kCompareOp: {
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int const feedback = Smi::ToInt(obj->ToSmi());
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CompareOperationHint hint = CompareOperationHintFromFeedback(feedback);
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if (hint == CompareOperationHint::kAny) {
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gen++;
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}
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if (hint != CompareOperationHint::kNone) {
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with++;
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}
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total++;
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break;
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}
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case FeedbackSlotKind::kForIn: {
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int const feedback = Smi::ToInt(obj->ToSmi());
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ForInHint hint = ForInHintFromFeedback(feedback);
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if (hint == ForInHint::kAny) {
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gen++;
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}
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if (hint != ForInHint::kNone) {
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with++;
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}
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total++;
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break;
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}
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case FeedbackSlotKind::kInstanceOf: {
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if (obj->IsWeakOrClearedHeapObject()) {
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with++;
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} else if (obj == megamorphic_sentinel) {
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gen++;
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with++;
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}
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total++;
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break;
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}
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case FeedbackSlotKind::kCreateClosure:
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case FeedbackSlotKind::kLiteral:
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case FeedbackSlotKind::kCloneObject:
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break;
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case FeedbackSlotKind::kInvalid:
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case FeedbackSlotKind::kKindsNumber:
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UNREACHABLE();
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break;
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}
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}
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*with_type_info = with;
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*generic = gen;
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*vector_ic_count = total;
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}
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Handle<Symbol> FeedbackVector::UninitializedSentinel(Isolate* isolate) {
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return isolate->factory()->uninitialized_symbol();
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}
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Handle<Symbol> FeedbackVector::GenericSentinel(Isolate* isolate) {
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return isolate->factory()->generic_symbol();
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}
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Handle<Symbol> FeedbackVector::MegamorphicSentinel(Isolate* isolate) {
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return isolate->factory()->megamorphic_symbol();
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}
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Handle<Symbol> FeedbackVector::PremonomorphicSentinel(Isolate* isolate) {
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return isolate->factory()->premonomorphic_symbol();
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}
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Symbol* FeedbackVector::RawUninitializedSentinel(Isolate* isolate) {
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return ReadOnlyRoots(isolate).uninitialized_symbol();
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}
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bool FeedbackMetadataIterator::HasNext() const {
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return next_slot_.ToInt() < metadata()->slot_count();
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}
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FeedbackSlot FeedbackMetadataIterator::Next() {
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DCHECK(HasNext());
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cur_slot_ = next_slot_;
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slot_kind_ = metadata()->GetKind(cur_slot_);
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next_slot_ = FeedbackSlot(next_slot_.ToInt() + entry_size());
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return cur_slot_;
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}
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int FeedbackMetadataIterator::entry_size() const {
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return FeedbackMetadata::GetSlotSize(kind());
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}
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MaybeObject* FeedbackNexus::GetFeedback() const {
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MaybeObject* feedback = vector()->Get(slot());
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FeedbackVector::AssertNoLegacyTypes(feedback);
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return feedback;
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}
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MaybeObject* FeedbackNexus::GetFeedbackExtra() const {
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#ifdef DEBUG
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FeedbackSlotKind kind = vector()->GetKind(slot());
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DCHECK_LT(1, FeedbackMetadata::GetSlotSize(kind));
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#endif
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int extra_index = vector()->GetIndex(slot()) + 1;
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return vector()->get(extra_index);
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}
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void FeedbackNexus::SetFeedback(Object* feedback, WriteBarrierMode mode) {
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SetFeedback(MaybeObject::FromObject(feedback));
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}
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void FeedbackNexus::SetFeedback(MaybeObject* feedback, WriteBarrierMode mode) {
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FeedbackVector::AssertNoLegacyTypes(feedback);
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vector()->Set(slot(), feedback, mode);
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}
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void FeedbackNexus::SetFeedbackExtra(Object* feedback_extra,
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WriteBarrierMode mode) {
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#ifdef DEBUG
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FeedbackSlotKind kind = vector()->GetKind(slot());
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DCHECK_LT(1, FeedbackMetadata::GetSlotSize(kind));
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FeedbackVector::AssertNoLegacyTypes(MaybeObject::FromObject(feedback_extra));
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#endif
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int index = vector()->GetIndex(slot()) + 1;
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vector()->set(index, MaybeObject::FromObject(feedback_extra), mode);
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}
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void FeedbackNexus::SetFeedbackExtra(MaybeObject* feedback_extra,
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WriteBarrierMode mode) {
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#ifdef DEBUG
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FeedbackVector::AssertNoLegacyTypes(feedback_extra);
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#endif
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int index = vector()->GetIndex(slot()) + 1;
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vector()->set(index, feedback_extra, mode);
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}
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Isolate* FeedbackNexus::GetIsolate() const { return vector()->GetIsolate(); }
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} // namespace internal
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} // namespace v8
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#include "src/objects/object-macros-undef.h"
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#endif // V8_FEEDBACK_VECTOR_INL_H_
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