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LibJS: Devirtualize TypedArrayBase::kind()

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Let's put this in a member variable to avoid the virtual call.
This commit is contained in:
Andreas Kling 2023-11-26 15:08:55 +01:00
parent 3fcb07597b
commit d154a758fa
2 changed files with 9 additions and 6 deletions
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3
Userland/Libraries/LibJS/Runtime/TypedArray.cpp
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@ -444,7 +444,8 @@ void TypedArrayBase::visit_edges(Visitor& visitor)
\
ClassName::ClassName(Object& prototype, u32 length, ArrayBuffer& array_buffer) \
: TypedArray(prototype, \
bit_cast<TypedArrayBase::IntrinsicConstructor>(&Intrinsics::snake_name##_constructor), length, array_buffer) \
bit_cast<TypedArrayBase::IntrinsicConstructor>(&Intrinsics::snake_name##_constructor), \
length, array_buffer, Kind::ClassName) \
{ \
if constexpr (#ClassName##sv.is_one_of("BigInt64Array", "BigUint64Array")) \
m_content_type = ContentType::BigInt; \

12
Userland/Libraries/LibJS/Runtime/TypedArray.h
View file

@ -53,9 +53,10 @@ public:
void set_byte_offset(u32 offset) { m_byte_offset = offset; }
void set_viewed_array_buffer(ArrayBuffer* array_buffer) { m_viewed_array_buffer = array_buffer; }
[[nodiscard]] Kind kind() const { return m_kind; }
virtual size_t element_size() const = 0;
virtual DeprecatedFlyString const& element_name() const = 0;
virtual Kind kind() const = 0;
// 25.1.2.6 IsUnclampedIntegerElementType ( type ), https://tc39.es/ecma262/#sec-isunclampedintegerelementtype
virtual bool is_unclamped_integer_element_type() const = 0;
@ -69,8 +70,9 @@ public:
virtual Value get_modify_set_value_in_buffer(size_t byte_index, Value value, ReadWriteModifyFunction operation, bool is_little_endian = true) = 0;
protected:
TypedArrayBase(Object& prototype, IntrinsicConstructor intrinsic_constructor)
TypedArrayBase(Object& prototype, IntrinsicConstructor intrinsic_constructor, Kind kind)
: Object(ConstructWithPrototypeTag::Tag, prototype, MayInterfereWithIndexedPropertyAccess::Yes)
, m_kind(kind)
, m_intrinsic_constructor(intrinsic_constructor)
{
}
@ -79,6 +81,7 @@ protected:
u32 m_byte_length { 0 };
u32 m_byte_offset { 0 };
ContentType m_content_type { ContentType::Number };
Kind m_kind {};
GCPtr<ArrayBuffer> m_viewed_array_buffer;
IntrinsicConstructor m_intrinsic_constructor { nullptr };
@ -450,8 +453,8 @@ public:
Value get_modify_set_value_in_buffer(size_t byte_index, Value value, ReadWriteModifyFunction operation, bool is_little_endian = true) override { return viewed_array_buffer()->template get_modify_set_value<T>(byte_index, value, move(operation), is_little_endian); }
protected:
TypedArray(Object& prototype, IntrinsicConstructor intrinsic_constructor, u32 array_length, ArrayBuffer& array_buffer)
: TypedArrayBase(prototype, intrinsic_constructor)
TypedArray(Object& prototype, IntrinsicConstructor intrinsic_constructor, u32 array_length, ArrayBuffer& array_buffer, Kind kind)
: TypedArrayBase(prototype, intrinsic_constructor, kind)
{
VERIFY(!Checked<u32>::multiplication_would_overflow(array_length, sizeof(UnderlyingBufferDataType)));
m_viewed_array_buffer = &array_buffer;
@ -480,7 +483,6 @@ ThrowCompletionOr<double> compare_typed_array_elements(VM&, Value x, Value y, Fu
static ThrowCompletionOr<NonnullGCPtr<ClassName>> create(Realm&, u32 length); \
static NonnullGCPtr<ClassName> create(Realm&, u32 length, ArrayBuffer& buffer); \
virtual DeprecatedFlyString const& element_name() const override; \
virtual Kind kind() const override { return Kind::ClassName; } \
\
protected: \
ClassName(Object& prototype, u32 length, ArrayBuffer& array_buffer); \