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https://github.com/SerenityOS/serenity
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LibJS/JIT: Resolve the GetById property name at JIT time
We can resolve the IdentifierTableIndex to a DeprecatedFlyString& once when jitting the code, instead of every time GetById executes.
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@ -35,14 +35,13 @@ ThrowCompletionOr<NonnullGCPtr<Object>> base_object_for_get(Bytecode::Interprete
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return base_value.to_object(vm);
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}
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ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter& interpreter, IdentifierTableIndex property, Value base_value, Value this_value, u32 cache_index)
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ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter& interpreter, DeprecatedFlyString const& property, Value base_value, Value this_value, u32 cache_index)
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{
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auto& vm = interpreter.vm();
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auto const& name = interpreter.current_executable().get_identifier(property);
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auto& cache = interpreter.current_executable().property_lookup_caches[cache_index];
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if (base_value.is_string()) {
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auto string_value = TRY(base_value.as_string().get(vm, name));
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auto string_value = TRY(base_value.as_string().get(vm, property));
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if (string_value.has_value())
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return *string_value;
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}
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@ -58,7 +57,7 @@ ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter& interpreter, Identifie
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}
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CacheablePropertyMetadata cacheable_metadata;
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auto value = TRY(base_obj->internal_get(name, this_value, &cacheable_metadata));
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auto value = TRY(base_obj->internal_get(property, this_value, &cacheable_metadata));
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if (cacheable_metadata.type == CacheablePropertyMetadata::Type::OwnProperty) {
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cache.shape = shape;
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@ -13,7 +13,7 @@
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namespace JS::Bytecode {
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ThrowCompletionOr<NonnullGCPtr<Object>> base_object_for_get(Bytecode::Interpreter&, Value base_value);
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ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter&, IdentifierTableIndex, Value base_value, Value this_value, u32 cache_index);
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ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter&, DeprecatedFlyString const& property, Value base_value, Value this_value, u32 cache_index);
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ThrowCompletionOr<Value> get_by_value(Bytecode::Interpreter&, Value base_value, Value property_key_value);
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ThrowCompletionOr<Value> get_global(Bytecode::Interpreter&, IdentifierTableIndex, u32 cache_index);
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ThrowCompletionOr<void> put_by_property_key(VM&, Value base, Value this_value, Value value, PropertyKey name, Op::PropertyKind kind);
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@ -760,7 +760,7 @@ ThrowCompletionOr<void> SetLocal::execute_impl(Bytecode::Interpreter&) const
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ThrowCompletionOr<void> GetById::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto base_value = interpreter.accumulator();
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interpreter.accumulator() = TRY(get_by_id(interpreter, m_property, base_value, base_value, m_cache_index));
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interpreter.accumulator() = TRY(get_by_id(interpreter, interpreter.current_executable().get_identifier(m_property), base_value, base_value, m_cache_index));
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return {};
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}
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@ -768,7 +768,7 @@ ThrowCompletionOr<void> GetByIdWithThis::execute_impl(Bytecode::Interpreter& int
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{
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auto base_value = interpreter.accumulator();
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auto this_value = interpreter.reg(m_this_value);
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interpreter.accumulator() = TRY(get_by_id(interpreter, m_property, base_value, this_value, m_cache_index));
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interpreter.accumulator() = TRY(get_by_id(interpreter, interpreter.current_executable().get_identifier(m_property), base_value, this_value, m_cache_index));
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return {};
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}
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@ -919,7 +919,7 @@ void Compiler::compile_new_class(Bytecode::Op::NewClass const& op)
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store_accumulator(RET);
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}
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static Value cxx_get_by_id(VM& vm, Value base, Bytecode::IdentifierTableIndex property, u32 cache_index)
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static Value cxx_get_by_id(VM& vm, Value base, DeprecatedFlyString const& property, u32 cache_index)
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{
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return TRY_OR_SET_EXCEPTION(Bytecode::get_by_id(vm.bytecode_interpreter(), property, base, base, cache_index));
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}
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@ -929,7 +929,7 @@ void Compiler::compile_get_by_id(Bytecode::Op::GetById const& op)
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load_accumulator(ARG1);
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m_assembler.mov(
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Assembler::Operand::Register(ARG2),
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Assembler::Operand::Imm(op.property().value()));
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Assembler::Operand::Imm(bit_cast<u64>(&m_bytecode_executable.get_identifier(op.property()))));
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m_assembler.mov(
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Assembler::Operand::Register(ARG3),
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Assembler::Operand::Imm(op.cache_index()));
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@ -1575,7 +1575,7 @@ void Compiler::compile_resolve_super_base(Bytecode::Op::ResolveSuperBase const&)
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check_exception();
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}
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static Value cxx_get_by_id_with_this(VM& vm, Bytecode::IdentifierTableIndex property, Value base_value, Value this_value, u32 cache_index)
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static Value cxx_get_by_id_with_this(VM& vm, DeprecatedFlyString const& property, Value base_value, Value this_value, u32 cache_index)
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{
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return TRY_OR_SET_EXCEPTION(get_by_id(vm.bytecode_interpreter(), property, base_value, this_value, cache_index));
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}
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@ -1584,7 +1584,7 @@ void Compiler::compile_get_by_id_with_this(Bytecode::Op::GetByIdWithThis const&
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{
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m_assembler.mov(
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Assembler::Operand::Register(ARG1),
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Assembler::Operand::Imm(op.property().value()));
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Assembler::Operand::Imm(bit_cast<u64>(&m_bytecode_executable.get_identifier(op.property()))));
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load_accumulator(ARG2);
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load_vm_register(ARG3, op.this_value());
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m_assembler.mov(
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