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LibJS: Implement SuperCall for the Bytecode-VM

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Hendiadyoin1 2022-08-30 18:03:02 +02:00 • committed by Linus Groh
parent 25be67299e
commit 21ae882cfd
Notes: sideshowbarker 2024-07-17 07:36:14 +09:00
5 changed files with 130 additions and 2 deletions
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28
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
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@ -521,6 +521,34 @@ Bytecode::CodeGenerationErrorOr<void> Identifier::generate_bytecode(Bytecode::Ge
return {};
}
Bytecode::CodeGenerationErrorOr<void> SuperCall::generate_bytecode(Bytecode::Generator& generator) const
{
Vector<Bytecode::Register> argument_registers;
if (m_is_synthetic == IsPartOfSyntheticConstructor::Yes) {
// NOTE: This is the case where we have a fake constructor(...args) { super(...args); } which
// shouldn't call @@iterator of %Array.prototype%.
VERIFY(m_arguments.size() == 1);
VERIFY(m_arguments[0].is_spread);
auto const& argument = m_arguments[0];
// This generates a single argument, which will be implicitly passed in accumulator
MUST(argument.value->generate_bytecode(generator));
} else {
argument_registers.ensure_capacity(m_arguments.size());
for (auto const& arg : m_arguments) {
TRY(arg.value->generate_bytecode(generator));
auto arg_reg = generator.allocate_register();
generator.emit<Bytecode::Op::Store>(arg_reg);
argument_registers.unchecked_append(arg_reg);
}
}
generator.emit_with_extra_register_slots<Bytecode::Op::SuperCall>(argument_registers.size(), m_is_synthetic == IsPartOfSyntheticConstructor::Yes, argument_registers);
return {};
}
static Bytecode::CodeGenerationErrorOr<void> generate_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode, Bytecode::Register const& value_reg);
Bytecode::CodeGenerationErrorOr<void> AssignmentExpression::generate_bytecode(Bytecode::Generator& generator) const