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diff --git a/deps/v8/src/objects/tagged-impl-inl.h b/deps/v8/src/objects/tagged-impl-inl.h
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+// Copyright 2019 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.
+
+#ifndef V8_OBJECTS_TAGGED_IMPL_INL_H_
+#define V8_OBJECTS_TAGGED_IMPL_INL_H_
+
+#include "src/objects/tagged-impl.h"
+
+#ifdef V8_COMPRESS_POINTERS
+#include "src/execution/isolate.h"
+#endif
+#include "src/common/ptr-compr-inl.h"
+#include "src/objects/heap-object.h"
+#include "src/objects/smi.h"
+#include "src/roots/roots-inl.h"
+
+namespace v8 {
+namespace internal {
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+bool TaggedImpl<kRefType, StorageType>::ToSmi(Smi* value) const {
+ if (HAS_SMI_TAG(ptr_)) {
+ *value = ToSmi();
+ return true;
+ }
+ return false;
+}
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+Smi TaggedImpl<kRefType, StorageType>::ToSmi() const {
+ DCHECK(HAS_SMI_TAG(ptr_));
+ if (kIsFull) {
+ return Smi(ptr_);
+ }
+ // Implementation for compressed pointers.
+ return Smi(DecompressTaggedSigned(static_cast<Tagged_t>(ptr_)));
+}
+
+//
+// TaggedImpl::GetHeapObject(HeapObject* result) implementation.
+//
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+bool TaggedImpl<kRefType, StorageType>::GetHeapObject(
+ HeapObject* result) const {
+ CHECK(kIsFull);
+ if (!IsStrongOrWeak()) return false;
+ *result = GetHeapObject();
+ return true;
+}
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+bool TaggedImpl<kRefType, StorageType>::GetHeapObject(
+ ROOT_PARAM, HeapObject* result) const {
+ if (kIsFull) return GetHeapObject(result);
+ // Implementation for compressed pointers.
+ if (!IsStrongOrWeak()) return false;
+ *result = GetHeapObject(ROOT_VALUE);
+ return true;
+}
+
+//
+// TaggedImpl::GetHeapObject(HeapObject* result,
+// HeapObjectReferenceType* reference_type)
+// implementation.
+//
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+bool TaggedImpl<kRefType, StorageType>::GetHeapObject(
+ HeapObject* result, HeapObjectReferenceType* reference_type) const {
+ CHECK(kIsFull);
+ if (!IsStrongOrWeak()) return false;
+ *reference_type = IsWeakOrCleared() ? HeapObjectReferenceType::WEAK
+ : HeapObjectReferenceType::STRONG;
+ *result = GetHeapObject();
+ return true;
+}
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+bool TaggedImpl<kRefType, StorageType>::GetHeapObject(
+ ROOT_PARAM, HeapObject* result,
+ HeapObjectReferenceType* reference_type) const {
+ if (kIsFull) return GetHeapObject(result, reference_type);
+ // Implementation for compressed pointers.
+ if (!IsStrongOrWeak()) return false;
+ *reference_type = IsWeakOrCleared() ? HeapObjectReferenceType::WEAK
+ : HeapObjectReferenceType::STRONG;
+ *result = GetHeapObject(ROOT_VALUE);
+ return true;
+}
+
+//
+// TaggedImpl::GetHeapObjectIfStrong(HeapObject* result) implementation.
+//
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+bool TaggedImpl<kRefType, StorageType>::GetHeapObjectIfStrong(
+ HeapObject* result) const {
+ CHECK(kIsFull);
+ if (IsStrong()) {
+ *result = HeapObject::cast(Object(ptr_));
+ return true;
+ }
+ return false;
+}
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+bool TaggedImpl<kRefType, StorageType>::GetHeapObjectIfStrong(
+ ROOT_PARAM, HeapObject* result) const {
+ if (kIsFull) return GetHeapObjectIfStrong(result);
+ // Implementation for compressed pointers.
+ if (IsStrong()) {
+ *result =
+ HeapObject::cast(Object(DecompressTaggedPointer(ROOT_VALUE, ptr_)));
+ return true;
+ }
+ return false;
+}
+
+//
+// TaggedImpl::GetHeapObjectAssumeStrong() implementation.
+//
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+HeapObject TaggedImpl<kRefType, StorageType>::GetHeapObjectAssumeStrong()
+ const {
+ CHECK(kIsFull);
+ DCHECK(IsStrong());
+ return HeapObject::cast(Object(ptr_));
+}
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+HeapObject TaggedImpl<kRefType, StorageType>::GetHeapObjectAssumeStrong(
+ ROOT_PARAM) const {
+ if (kIsFull) return GetHeapObjectAssumeStrong();
+ // Implementation for compressed pointers.
+ DCHECK(IsStrong());
+ return HeapObject::cast(Object(DecompressTaggedPointer(ROOT_VALUE, ptr_)));
+}
+
+//
+// TaggedImpl::GetHeapObjectIfWeak(HeapObject* result) implementation
+//
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+bool TaggedImpl<kRefType, StorageType>::GetHeapObjectIfWeak(
+ HeapObject* result) const {
+ CHECK(kIsFull);
+ if (kCanBeWeak) {
+ if (IsWeak()) {
+ *result = GetHeapObject();
+ return true;
+ }
+ return false;
+ } else {
+ DCHECK(!HAS_WEAK_HEAP_OBJECT_TAG(ptr_));
+ return false;
+ }
+}
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+bool TaggedImpl<kRefType, StorageType>::GetHeapObjectIfWeak(
+ ROOT_PARAM, HeapObject* result) const {
+ if (kIsFull) return GetHeapObjectIfWeak(result);
+ // Implementation for compressed pointers.
+ if (kCanBeWeak) {
+ if (IsWeak()) {
+ *result = GetHeapObject(ROOT_VALUE);
+ return true;
+ }
+ return false;
+ } else {
+ DCHECK(!HAS_WEAK_HEAP_OBJECT_TAG(ptr_));
+ return false;
+ }
+}
+
+//
+// TaggedImpl::GetHeapObjectAssumeWeak() implementation.
+//
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+HeapObject TaggedImpl<kRefType, StorageType>::GetHeapObjectAssumeWeak() const {
+ CHECK(kIsFull);
+ DCHECK(IsWeak());
+ return GetHeapObject();
+}
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+HeapObject TaggedImpl<kRefType, StorageType>::GetHeapObjectAssumeWeak(
+ ROOT_PARAM) const {
+ if (kIsFull) return GetHeapObjectAssumeWeak();
+ // Implementation for compressed pointers.
+ DCHECK(IsWeak());
+ return GetHeapObject(ROOT_VALUE);
+}
+
+//
+// TaggedImpl::GetHeapObject() implementation.
+//
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+HeapObject TaggedImpl<kRefType, StorageType>::GetHeapObject() const {
+ CHECK(kIsFull);
+ DCHECK(!IsSmi());
+ if (kCanBeWeak) {
+ DCHECK(!IsCleared());
+ return HeapObject::cast(Object(ptr_ & ~kWeakHeapObjectMask));
+ } else {
+ DCHECK(!HAS_WEAK_HEAP_OBJECT_TAG(ptr_));
+ return HeapObject::cast(Object(ptr_));
+ }
+}
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+HeapObject TaggedImpl<kRefType, StorageType>::GetHeapObject(ROOT_PARAM) const {
+ if (kIsFull) return GetHeapObject();
+ // Implementation for compressed pointers.
+ DCHECK(!IsSmi());
+ if (kCanBeWeak) {
+ DCHECK(!IsCleared());
+ return HeapObject::cast(Object(
+ DecompressTaggedPointer(ROOT_VALUE, ptr_ & ~kWeakHeapObjectMask)));
+ } else {
+ DCHECK(!HAS_WEAK_HEAP_OBJECT_TAG(ptr_));
+ return HeapObject::cast(Object(DecompressTaggedPointer(ROOT_VALUE, ptr_)));
+ }
+}
+
+//
+// TaggedImpl::GetHeapObjectOrSmi() implementation.
+//
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+Object TaggedImpl<kRefType, StorageType>::GetHeapObjectOrSmi() const {
+ CHECK(kIsFull);
+ if (IsSmi()) {
+ return Object(ptr_);
+ }
+ return GetHeapObject();
+}
+
+template <HeapObjectReferenceType kRefType, typename StorageType>
+Object TaggedImpl<kRefType, StorageType>::GetHeapObjectOrSmi(ROOT_PARAM) const {
+ if (kIsFull) return GetHeapObjectOrSmi();
+ // Implementation for compressed pointers.
+ if (IsSmi()) {
+ return Object(DecompressTaggedSigned(ptr_));
+ }
+ return GetHeapObject(ROOT_VALUE);
+}
+
+} // namespace internal
+} // namespace v8
+
+#endif // V8_OBJECTS_TAGGED_IMPL_INL_H_
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