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LibJS/Bytecode: Support destructuring in try..catch

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112 new passes in test262.
This commit is contained in:
Andreas Kling 2023-06-24 20:29:30 +02:00
parent 3d755a57b6
commit 4fd71e3c3a
Notes: sideshowbarker 2024-07-17 18:06:52 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/4fd71e3c3a
Pull-request: https://github.com/SerenityOS/serenity/pull/19611
1 changed files with 29 additions and 20 deletions
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49
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
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@ -353,7 +353,7 @@ Bytecode::CodeGenerationErrorOr<void> SuperCall::generate_bytecode(Bytecode::Gen
return {};
}
static Bytecode::CodeGenerationErrorOr<void> generate_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode, Bytecode::Register const& value_reg);
static Bytecode::CodeGenerationErrorOr<void> generate_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode, Bytecode::Register const& value_reg, bool create_variables);
Bytecode::CodeGenerationErrorOr<void> AssignmentExpression::generate_bytecode(Bytecode::Generator& generator) const
{
@ -450,7 +450,7 @@ Bytecode::CodeGenerationErrorOr<void> AssignmentExpression::generate_bytecode(By
generator.emit<Bytecode::Op::Store>(value_register);
// 5. Perform ? DestructuringAssignmentEvaluation of assignmentPattern with argument rval.
TRY(generate_binding_pattern_bytecode(generator, pattern, Bytecode::Op::SetVariable::InitializationMode::Set, value_register));
TRY(generate_binding_pattern_bytecode(generator, pattern, Bytecode::Op::SetVariable::InitializationMode::Set, value_register, false));
// 6. Return rval.
generator.emit<Bytecode::Op::Load>(value_register);
@ -991,7 +991,7 @@ Bytecode::CodeGenerationErrorOr<void> FunctionExpression::generate_bytecode(Byte
return generate_bytecode_with_lhs_name(generator, {});
}
static Bytecode::CodeGenerationErrorOr<void> generate_object_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode initialization_mode, Bytecode::Register const& value_reg)
static Bytecode::CodeGenerationErrorOr<void> generate_object_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode initialization_mode, Bytecode::Register const& value_reg, bool create_variables)
{
Vector<Bytecode::Register> excluded_property_names;
auto has_rest = false;
@ -1008,6 +1008,8 @@ static Bytecode::CodeGenerationErrorOr<void> generate_object_binding_pattern_byt
auto interned_identifier = generator.intern_identifier(identifier);
generator.emit_with_extra_register_slots<Bytecode::Op::CopyObjectExcludingProperties>(excluded_property_names.size(), value_reg, excluded_property_names);
if (create_variables)
generator.emit<Bytecode::Op::CreateVariable>(interned_identifier, Bytecode::Op::EnvironmentMode::Lexical, false);
generator.emit<Bytecode::Op::SetVariable>(interned_identifier, initialization_mode);
return {};
@ -1066,7 +1068,7 @@ static Bytecode::CodeGenerationErrorOr<void> generate_object_binding_pattern_byt
auto& binding_pattern = *alias.get<NonnullRefPtr<BindingPattern const>>();
auto nested_value_reg = generator.allocate_register();
generator.emit<Bytecode::Op::Store>(nested_value_reg);
TRY(generate_binding_pattern_bytecode(generator, binding_pattern, initialization_mode, nested_value_reg));
TRY(generate_binding_pattern_bytecode(generator, binding_pattern, initialization_mode, nested_value_reg, create_variables));
} else if (alias.has<Empty>()) {
if (name.has<NonnullRefPtr<Expression const>>()) {
// This needs some sort of SetVariableByValue opcode, as it's a runtime binding
@ -1077,16 +1079,22 @@ static Bytecode::CodeGenerationErrorOr<void> generate_object_binding_pattern_byt
}
auto& identifier = name.get<NonnullRefPtr<Identifier const>>()->string();
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(identifier), initialization_mode);
auto identifier_ref = generator.intern_identifier(identifier);
if (create_variables)
generator.emit<Bytecode::Op::CreateVariable>(identifier_ref, Bytecode::Op::EnvironmentMode::Lexical, false);
generator.emit<Bytecode::Op::SetVariable>(identifier_ref, initialization_mode);
} else {
auto& identifier = alias.get<NonnullRefPtr<Identifier const>>()->string();
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(identifier), initialization_mode);
auto identifier_ref = generator.intern_identifier(identifier);
if (create_variables)
generator.emit<Bytecode::Op::CreateVariable>(identifier_ref, Bytecode::Op::EnvironmentMode::Lexical, false);
generator.emit<Bytecode::Op::SetVariable>(identifier_ref, initialization_mode);
}
}
return {};
}
static Bytecode::CodeGenerationErrorOr<void> generate_array_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode initialization_mode, Bytecode::Register const& value_reg)
static Bytecode::CodeGenerationErrorOr<void> generate_array_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode initialization_mode, Bytecode::Register const& value_reg, bool create_variables)
{
/*
* Consider the following destructuring assignment:
@ -1127,6 +1135,8 @@ static Bytecode::CodeGenerationErrorOr<void> generate_array_binding_pattern_byte
},
[&](NonnullRefPtr<Identifier const> const& identifier) -> Bytecode::CodeGenerationErrorOr<void> {
auto interned_index = generator.intern_identifier(identifier->string());
if (create_variables)
generator.emit<Bytecode::Op::CreateVariable>(interned_index, Bytecode::Op::EnvironmentMode::Lexical, false);
generator.emit<Bytecode::Op::SetVariable>(interned_index, initialization_mode);
return {};
},
@ -1134,7 +1144,7 @@ static Bytecode::CodeGenerationErrorOr<void> generate_array_binding_pattern_byte
// Store the accumulator value in a permanent register
auto target_reg = generator.allocate_register();
generator.emit<Bytecode::Op::Store>(target_reg);
return generate_binding_pattern_bytecode(generator, pattern, initialization_mode, target_reg);
return generate_binding_pattern_bytecode(generator, pattern, initialization_mode, target_reg, create_variables);
},
[&](NonnullRefPtr<MemberExpression const> const& expr) -> Bytecode::CodeGenerationErrorOr<void> {
return generator.emit_store_to_reference(*expr);
@ -1263,12 +1273,12 @@ static Bytecode::CodeGenerationErrorOr<void> generate_array_binding_pattern_byte
return {};
}
static Bytecode::CodeGenerationErrorOr<void> generate_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode initialization_mode, Bytecode::Register const& value_reg)
static Bytecode::CodeGenerationErrorOr<void> generate_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode initialization_mode, Bytecode::Register const& value_reg, bool create_variables)
{
if (pattern.kind == BindingPattern::Kind::Object)
return generate_object_binding_pattern_bytecode(generator, pattern, initialization_mode, value_reg);
return generate_object_binding_pattern_bytecode(generator, pattern, initialization_mode, value_reg, create_variables);
return generate_array_binding_pattern_bytecode(generator, pattern, initialization_mode, value_reg);
return generate_array_binding_pattern_bytecode(generator, pattern, initialization_mode, value_reg, create_variables);
}
static Bytecode::CodeGenerationErrorOr<void> assign_accumulator_to_variable_declarator(Bytecode::Generator& generator, VariableDeclarator const& declarator, VariableDeclaration const& declaration)
@ -1283,7 +1293,7 @@ static Bytecode::CodeGenerationErrorOr<void> assign_accumulator_to_variable_decl
[&](NonnullRefPtr<BindingPattern const> const& pattern) -> Bytecode::CodeGenerationErrorOr<void> {
auto value_register = generator.allocate_register();
generator.emit<Bytecode::Op::Store>(value_register);
return generate_binding_pattern_bytecode(generator, pattern, initialization_mode, value_register);
return generate_binding_pattern_bytecode(generator, pattern, initialization_mode, value_register, false);
});
}
@ -2051,12 +2061,11 @@ Bytecode::CodeGenerationErrorOr<void> TryStatement::generate_bytecode(Bytecode::
}
return {};
},
[&](NonnullRefPtr<BindingPattern const> const&) -> Bytecode::CodeGenerationErrorOr<void> {
// FIXME: Implement this path when the above DeclarativeEnvironment issue is dealt with.
return Bytecode::CodeGenerationError {
this,
"Unimplemented catch argument: BindingPattern"sv,
};
[&](NonnullRefPtr<BindingPattern const> const& binding_pattern) -> Bytecode::CodeGenerationErrorOr<void> {
auto value_register = generator.allocate_register();
generator.emit<Bytecode::Op::Store>(value_register);
TRY(generate_binding_pattern_bytecode(generator, *binding_pattern, Bytecode::Op::SetVariable::InitializationMode::Initialize, value_register, true));
return {};
}));
TRY(m_handler->body().generate_bytecode(generator));
@ -2457,7 +2466,7 @@ static Bytecode::CodeGenerationErrorOr<void> for_in_of_body_evaluation(Bytecode:
auto& binding_pattern = lhs.get<NonnullRefPtr<BindingPattern const>>();
auto value_register = generator.allocate_register();
generator.emit<Bytecode::Op::Store>(value_register);
TRY(generate_binding_pattern_bytecode(generator, *binding_pattern, Bytecode::Op::SetVariable::InitializationMode::Set, value_register));
TRY(generate_binding_pattern_bytecode(generator, *binding_pattern, Bytecode::Op::SetVariable::InitializationMode::Set, value_register, false));
}
}
}
@ -2534,7 +2543,7 @@ static Bytecode::CodeGenerationErrorOr<void> for_in_of_body_evaluation(Bytecode:
auto value_register = generator.allocate_register();
generator.emit<Bytecode::Op::Store>(value_register);
TRY(generate_binding_pattern_bytecode(generator, *binding_pattern, head_result.lhs_kind == LHSKind::VarBinding ? Bytecode::Op::SetVariable::InitializationMode::Set : Bytecode::Op::SetVariable::InitializationMode::Initialize, value_register));
TRY(generate_binding_pattern_bytecode(generator, *binding_pattern, head_result.lhs_kind == LHSKind::VarBinding ? Bytecode::Op::SetVariable::InitializationMode::Set : Bytecode::Op::SetVariable::InitializationMode::Initialize, value_register, false));
} else {
return Bytecode::CodeGenerationError {
&node,