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LibJS/JIT: Resolve the GetById property name at JIT time

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We can resolve the IdentifierTableIndex to a DeprecatedFlyString& once
when jitting the code, instead of every time GetById executes.
This commit is contained in:
Andreas Kling 2023-11-05 14:16:41 +01:00
parent 673e3ec57d
commit c92954db36
4 changed files with 10 additions and 11 deletions
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7
Userland/Libraries/LibJS/Bytecode/CommonImplementations.cpp
View file

@ -35,14 +35,13 @@ ThrowCompletionOr<NonnullGCPtr<Object>> base_object_for_get(Bytecode::Interprete
return base_value.to_object(vm); return base_value.to_object(vm);
} }
ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter& interpreter, IdentifierTableIndex property, Value base_value, Value this_value, u32 cache_index) ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter& interpreter, DeprecatedFlyString const& property, Value base_value, Value this_value, u32 cache_index)
{ {
auto& vm = interpreter.vm(); auto& vm = interpreter.vm();
auto const& name = interpreter.current_executable().get_identifier(property);
auto& cache = interpreter.current_executable().property_lookup_caches[cache_index]; auto& cache = interpreter.current_executable().property_lookup_caches[cache_index];
if (base_value.is_string()) { if (base_value.is_string()) {
auto string_value = TRY(base_value.as_string().get(vm, name)); auto string_value = TRY(base_value.as_string().get(vm, property));
if (string_value.has_value()) if (string_value.has_value())
return *string_value; return *string_value;
} }
@ -58,7 +57,7 @@ ThrowCompletionOr<Value> get_by_id(Bytecode::Interpreter& interpreter, Identifie
} }
CacheablePropertyMetadata cacheable_metadata; CacheablePropertyMetadata cacheable_metadata;
auto value = TRY(base_obj->internal_get(name, this_value, &cacheable_metadata)); auto value = TRY(base_obj->internal_get(property, this_value, &cacheable_metadata));
if (cacheable_metadata.type == CacheablePropertyMetadata::Type::OwnProperty) { if (cacheable_metadata.type == CacheablePropertyMetadata::Type::OwnProperty) {
cache.shape = shape; cache.shape = shape;

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

@ -13,7 +13,7 @@
namespace JS::Bytecode { namespace JS::Bytecode {
ThrowCompletionOr<NonnullGCPtr<Object>> base_object_for_get(Bytecode::Interpreter&, Value base_value); 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_id(Bytecode::Interpreter&, DeprecatedFlyString const& property, Value base_value, Value this_value, u32 cache_index);
ThrowCompletionOr<Value> get_by_value(Bytecode::Interpreter&, Value base_value, Value property_key_value); ThrowCompletionOr<Value> get_by_value(Bytecode::Interpreter&, Value base_value, Value property_key_value);
ThrowCompletionOr<Value> get_global(Bytecode::Interpreter&, IdentifierTableIndex, u32 cache_index); ThrowCompletionOr<Value> get_global(Bytecode::Interpreter&, IdentifierTableIndex, u32 cache_index);
ThrowCompletionOr<void> put_by_property_key(VM&, Value base, Value this_value, Value value, PropertyKey name, Op::PropertyKind kind); ThrowCompletionOr<void> put_by_property_key(VM&, Value base, Value this_value, Value value, PropertyKey name, Op::PropertyKind kind);

4
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
View file

@ -760,7 +760,7 @@ ThrowCompletionOr<void> SetLocal::execute_impl(Bytecode::Interpreter&) const
ThrowCompletionOr<void> GetById::execute_impl(Bytecode::Interpreter& interpreter) const ThrowCompletionOr<void> GetById::execute_impl(Bytecode::Interpreter& interpreter) const
{ {
auto base_value = interpreter.accumulator(); auto base_value = interpreter.accumulator();
interpreter.accumulator() = TRY(get_by_id(interpreter, m_property, base_value, base_value, m_cache_index)); interpreter.accumulator() = TRY(get_by_id(interpreter, interpreter.current_executable().get_identifier(m_property), base_value, base_value, m_cache_index));
return {}; return {};
} }
@ -768,7 +768,7 @@ ThrowCompletionOr<void> GetByIdWithThis::execute_impl(Bytecode::Interpreter& int
{ {
auto base_value = interpreter.accumulator(); auto base_value = interpreter.accumulator();
auto this_value = interpreter.reg(m_this_value); auto this_value = interpreter.reg(m_this_value);
interpreter.accumulator() = TRY(get_by_id(interpreter, m_property, base_value, this_value, m_cache_index)); interpreter.accumulator() = TRY(get_by_id(interpreter, interpreter.current_executable().get_identifier(m_property), base_value, this_value, m_cache_index));
return {}; return {};
} }

8
Userland/Libraries/LibJS/JIT/Compiler.cpp
View file

@ -919,7 +919,7 @@ void Compiler::compile_new_class(Bytecode::Op::NewClass const& op)
store_accumulator(RET); store_accumulator(RET);
} }
static Value cxx_get_by_id(VM& vm, Value base, Bytecode::IdentifierTableIndex property, u32 cache_index) static Value cxx_get_by_id(VM& vm, Value base, DeprecatedFlyString const& property, u32 cache_index)
{ {
return TRY_OR_SET_EXCEPTION(Bytecode::get_by_id(vm.bytecode_interpreter(), property, base, base, cache_index)); return TRY_OR_SET_EXCEPTION(Bytecode::get_by_id(vm.bytecode_interpreter(), property, base, base, cache_index));
} }
@ -929,7 +929,7 @@ void Compiler::compile_get_by_id(Bytecode::Op::GetById const& op)
load_accumulator(ARG1); load_accumulator(ARG1);
m_assembler.mov( m_assembler.mov(
Assembler::Operand::Register(ARG2), Assembler::Operand::Register(ARG2),
Assembler::Operand::Imm(op.property().value())); Assembler::Operand::Imm(bit_cast<u64>(&m_bytecode_executable.get_identifier(op.property()))));
m_assembler.mov( m_assembler.mov(
Assembler::Operand::Register(ARG3), Assembler::Operand::Register(ARG3),
Assembler::Operand::Imm(op.cache_index())); Assembler::Operand::Imm(op.cache_index()));
@ -1575,7 +1575,7 @@ void Compiler::compile_resolve_super_base(Bytecode::Op::ResolveSuperBase const&)
check_exception(); check_exception();
} }
static Value cxx_get_by_id_with_this(VM& vm, Bytecode::IdentifierTableIndex property, Value base_value, Value this_value, u32 cache_index) static Value cxx_get_by_id_with_this(VM& vm, DeprecatedFlyString const& property, Value base_value, Value this_value, u32 cache_index)
{ {
return TRY_OR_SET_EXCEPTION(get_by_id(vm.bytecode_interpreter(), property, base_value, this_value, cache_index)); return TRY_OR_SET_EXCEPTION(get_by_id(vm.bytecode_interpreter(), property, base_value, this_value, cache_index));
} }
@ -1584,7 +1584,7 @@ void Compiler::compile_get_by_id_with_this(Bytecode::Op::GetByIdWithThis const&
{ {
m_assembler.mov( m_assembler.mov(
Assembler::Operand::Register(ARG1), Assembler::Operand::Register(ARG1),
Assembler::Operand::Imm(op.property().value())); Assembler::Operand::Imm(bit_cast<u64>(&m_bytecode_executable.get_identifier(op.property()))));
load_accumulator(ARG2); load_accumulator(ARG2);
load_vm_register(ARG3, op.this_value()); load_vm_register(ARG3, op.this_value());
m_assembler.mov( m_assembler.mov(