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LibJS/Bytecode: Move GetByValue implementation to CommonImplementations

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This commit is contained in:
Andreas Kling 2023-10-20 12:38:43 +02:00
parent 1c0efbec6b
commit e8190105db
4 changed files with 30 additions and 31 deletions
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26
Userland/Libraries/LibJS/Bytecode/CommonImplementations.cpp
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@ -60,4 +60,30 @@ ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter& interpreter, Identifie
return value;
}
ThrowCompletionOr<Value> get_by_value(Bytecode::Interpreter& interpreter, Value base_value, Value property_key_value)
{
auto& vm = interpreter.vm();
auto object = TRY(base_object_for_get(interpreter, base_value));
// OPTIMIZATION: Fast path for simple Int32 indexes in array-like objects.
if (property_key_value.is_int32()
&& property_key_value.as_i32() >= 0
&& !object->may_interfere_with_indexed_property_access()
&& object->indexed_properties().has_index(property_key_value.as_i32())) {
auto value = object->indexed_properties().get(property_key_value.as_i32())->value;
if (!value.is_accessor())
return value;
}
auto property_key = TRY(property_key_value.to_property_key(vm));
if (base_value.is_string()) {
auto string_value = TRY(base_value.as_string().get(vm, property_key));
if (string_value.has_value())
return *string_value;
}
return TRY(object->internal_get(property_key, base_value));
}
}

1
Userland/Libraries/LibJS/Bytecode/CommonImplementations.h
View file

@ -13,5 +13,6 @@ namespace JS::Bytecode {
ThrowCompletionOr<NonnullGCPtr<Object>> base_object_for_get(Bytecode::Interpreter&, Value base_value);
ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter&, IdentifierTableIndex, Value base_value, Value this_value, u32 cache_index);
ThrowCompletionOr<Value> get_by_value(Bytecode::Interpreter&, Value base_value, Value property_key_value);
}

32
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
View file

@ -1483,37 +1483,7 @@ ThrowCompletionOr<void> Await::execute_impl(Bytecode::Interpreter& interpreter)
ThrowCompletionOr<void> GetByValue::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// NOTE: Get the property key from the accumulator before side effects have a chance to overwrite it.
auto property_key_value = interpreter.accumulator();
auto base_value = interpreter.reg(m_base);
auto object = TRY(base_object_for_get(interpreter, base_value));
// OPTIMIZATION: Fast path for simple Int32 indexes in array-like objects.
if (property_key_value.is_int32()
&& property_key_value.as_i32() >= 0
&& !object->may_interfere_with_indexed_property_access()
&& object->indexed_properties().has_index(property_key_value.as_i32())) {
auto value = object->indexed_properties().get(property_key_value.as_i32())->value;
if (!value.is_accessor()) {
interpreter.accumulator() = value;
return {};
}
}
auto property_key = TRY(property_key_value.to_property_key(vm));
if (base_value.is_string()) {
auto string_value = TRY(base_value.as_string().get(vm, property_key));
if (string_value.has_value()) {
interpreter.accumulator() = *string_value;
return {};
}
}
interpreter.accumulator() = TRY(object->internal_get(property_key, base_value));
interpreter.accumulator() = TRY(get_by_value(interpreter, interpreter.reg(m_base), interpreter.accumulator()));
return {};
}

2
Userland/Libraries/LibJS/Bytecode/Op.h
View file

@ -727,6 +727,8 @@ public:
ThrowCompletionOr<void> execute_impl(Bytecode::Interpreter&) const;
DeprecatedString to_deprecated_string_impl(Bytecode::Executable const&) const;
Register base() const { return m_base; }
private:
Register m_base;
};