mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 19:57:35 +00:00
LibJS: Make ASTNode::generate_bytecode() fallible
Instead of crashing on the spot, return a descriptive error that will eventually continue its days as a javascript "InternalError" exception. This should make random crashes with BC less likely.
This commit is contained in:
Ali Mohammad Pur
Linus Groh
parent
3a5f7cb524
commit
75aa900b83
10 changed files with 378 additions and 233 deletions
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@ -18,13 +18,15 @@
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namespace JS {
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void ASTNode::generate_bytecode(Bytecode::Generator&) const
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Bytecode::CodeGenerationErrorOr<void> ASTNode::generate_bytecode(Bytecode::Generator&) const
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{
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dbgln("Missing generate_bytecode() in {}", class_name());
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TODO();
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return Bytecode::CodeGenerationError {
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this,
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"Missing generate_bytecode()"sv,
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};
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}
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void ScopeNode::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> ScopeNode::generate_bytecode(Bytecode::Generator& generator) const
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{
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// FIXME: This is an ad-hoc fix but should be done as the spec says in
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// {Global, Block, Function, Eval}DeclarationInstantiation.
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@ -44,28 +46,31 @@ void ScopeNode::generate_bytecode(Bytecode::Generator& generator) const
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// FIXME: Register lexical and variable scope declarations
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for (auto& child : children()) {
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child.generate_bytecode(generator);
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TRY(child.generate_bytecode(generator));
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if (generator.is_current_block_terminated())
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break;
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}
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return {};
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}
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void EmptyStatement::generate_bytecode(Bytecode::Generator&) const
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Bytecode::CodeGenerationErrorOr<void> EmptyStatement::generate_bytecode(Bytecode::Generator&) const
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{
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return {};
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}
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void ExpressionStatement::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> ExpressionStatement::generate_bytecode(Bytecode::Generator& generator) const
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{
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m_expression->generate_bytecode(generator);
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return m_expression->generate_bytecode(generator);
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}
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void BinaryExpression::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> BinaryExpression::generate_bytecode(Bytecode::Generator& generator) const
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{
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m_lhs->generate_bytecode(generator);
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TRY(m_lhs->generate_bytecode(generator));
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auto lhs_reg = generator.allocate_register();
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generator.emit<Bytecode::Op::Store>(lhs_reg);
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m_rhs->generate_bytecode(generator);
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TRY(m_rhs->generate_bytecode(generator));
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switch (m_op) {
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case BinaryOp::Addition:
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@ -137,11 +142,12 @@ void BinaryExpression::generate_bytecode(Bytecode::Generator& generator) const
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default:
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VERIFY_NOT_REACHED();
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}
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return {};
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}
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void LogicalExpression::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> LogicalExpression::generate_bytecode(Bytecode::Generator& generator) const
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{
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m_lhs->generate_bytecode(generator);
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TRY(m_lhs->generate_bytecode(generator));
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// lhs
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// jump op (true) end (false) rhs
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@ -173,18 +179,19 @@ void LogicalExpression::generate_bytecode(Bytecode::Generator& generator) const
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}
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generator.switch_to_basic_block(rhs_block);
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m_rhs->generate_bytecode(generator);
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TRY(m_rhs->generate_bytecode(generator));
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generator.emit<Bytecode::Op::Jump>().set_targets(
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Bytecode::Label { end_block },
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{});
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generator.switch_to_basic_block(end_block);
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return {};
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}
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void UnaryExpression::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> UnaryExpression::generate_bytecode(Bytecode::Generator& generator) const
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{
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m_lhs->generate_bytecode(generator);
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TRY(m_lhs->generate_bytecode(generator));
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switch (m_op) {
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case UnaryOp::BitwiseNot:
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@ -206,59 +213,70 @@ void UnaryExpression::generate_bytecode(Bytecode::Generator& generator) const
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generator.emit<Bytecode::Op::LoadImmediate>(js_undefined());
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break;
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default:
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TODO();
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return Bytecode::CodeGenerationError {
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this,
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"Unimplemented operation"sv,
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};
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}
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return {};
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}
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void NumericLiteral::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> NumericLiteral::generate_bytecode(Bytecode::Generator& generator) const
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{
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generator.emit<Bytecode::Op::LoadImmediate>(m_value);
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return {};
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}
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void BooleanLiteral::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> BooleanLiteral::generate_bytecode(Bytecode::Generator& generator) const
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{
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generator.emit<Bytecode::Op::LoadImmediate>(Value(m_value));
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return {};
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}
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void NullLiteral::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> NullLiteral::generate_bytecode(Bytecode::Generator& generator) const
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{
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generator.emit<Bytecode::Op::LoadImmediate>(js_null());
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return {};
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}
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void BigIntLiteral::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> BigIntLiteral::generate_bytecode(Bytecode::Generator& generator) const
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{
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generator.emit<Bytecode::Op::NewBigInt>(Crypto::SignedBigInteger::from_base(10, m_value.substring(0, m_value.length() - 1)));
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return {};
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}
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void StringLiteral::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> StringLiteral::generate_bytecode(Bytecode::Generator& generator) const
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{
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generator.emit<Bytecode::Op::NewString>(generator.intern_string(m_value));
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return {};
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}
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void RegExpLiteral::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> RegExpLiteral::generate_bytecode(Bytecode::Generator& generator) const
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{
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auto source_index = generator.intern_string(m_pattern);
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auto flags_index = generator.intern_string(m_flags);
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generator.emit<Bytecode::Op::NewRegExp>(source_index, flags_index);
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return {};
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}
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void Identifier::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> Identifier::generate_bytecode(Bytecode::Generator& generator) const
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{
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generator.emit<Bytecode::Op::GetVariable>(generator.intern_identifier(m_string));
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return {};
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}
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void AssignmentExpression::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> AssignmentExpression::generate_bytecode(Bytecode::Generator& generator) const
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{
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// FIXME: Implement this for BindingPatterns too.
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auto& lhs = m_lhs.get<NonnullRefPtr<Expression>>();
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if (m_op == AssignmentOp::Assignment) {
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m_rhs->generate_bytecode(generator);
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generator.emit_store_to_reference(lhs);
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return;
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TRY(m_rhs->generate_bytecode(generator));
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return generator.emit_store_to_reference(lhs);
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}
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generator.emit_load_from_reference(lhs);
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TRY(generator.emit_load_from_reference(lhs));
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Bytecode::BasicBlock* rhs_block_ptr { nullptr };
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Bytecode::BasicBlock* end_block_ptr { nullptr };
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@ -294,7 +312,7 @@ void AssignmentExpression::generate_bytecode(Bytecode::Generator& generator) con
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// if the logical assignment condition fails.
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auto lhs_reg = generator.allocate_register();
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generator.emit<Bytecode::Op::Store>(lhs_reg);
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m_rhs->generate_bytecode(generator);
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TRY(m_rhs->generate_bytecode(generator));
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switch (m_op) {
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case AssignmentOp::AdditionAssignment:
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@ -338,10 +356,13 @@ void AssignmentExpression::generate_bytecode(Bytecode::Generator& generator) con
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case AssignmentOp::NullishAssignment:
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break; // These are handled above.
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default:
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TODO();
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return Bytecode::CodeGenerationError {
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this,
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"Unimplemented operation"sv,
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};
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}
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generator.emit_store_to_reference(lhs);
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TRY(generator.emit_store_to_reference(lhs));
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if (end_block_ptr) {
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generator.emit<Bytecode::Op::Jump>().set_targets(
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@ -350,9 +371,11 @@ void AssignmentExpression::generate_bytecode(Bytecode::Generator& generator) con
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generator.switch_to_basic_block(*end_block_ptr);
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}
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return {};
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}
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void WhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> WhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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{
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// test
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// jump if_false (true) end (false) body
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@ -374,7 +397,7 @@ void WhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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{});
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generator.switch_to_basic_block(test_block);
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m_test->generate_bytecode(generator);
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TRY(m_test->generate_bytecode(generator));
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generator.emit<Bytecode::Op::JumpConditional>().set_targets(
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Bytecode::Label { body_block },
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Bytecode::Label { end_block });
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@ -382,7 +405,7 @@ void WhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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generator.switch_to_basic_block(body_block);
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generator.begin_continuable_scope(Bytecode::Label { test_block });
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generator.begin_breakable_scope(Bytecode::Label { end_block });
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m_body->generate_bytecode(generator);
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TRY(m_body->generate_bytecode(generator));
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if (!generator.is_current_block_terminated()) {
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generator.emit<Bytecode::Op::Jump>().set_targets(
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Bytecode::Label { test_block },
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@ -392,9 +415,11 @@ void WhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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generator.switch_to_basic_block(end_block);
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generator.emit<Bytecode::Op::Load>(result_reg);
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}
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return {};
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}
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void DoWhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> DoWhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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{
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// jump always (true) body
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// test
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@ -417,7 +442,7 @@ void DoWhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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{});
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generator.switch_to_basic_block(test_block);
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m_test->generate_bytecode(generator);
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TRY(m_test->generate_bytecode(generator));
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generator.emit<Bytecode::Op::JumpConditional>().set_targets(
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Bytecode::Label { body_block },
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Bytecode::Label { end_block });
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@ -425,7 +450,7 @@ void DoWhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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generator.switch_to_basic_block(body_block);
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generator.begin_continuable_scope(Bytecode::Label { test_block });
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generator.begin_breakable_scope(Bytecode::Label { end_block });
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m_body->generate_bytecode(generator);
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TRY(m_body->generate_bytecode(generator));
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if (!generator.is_current_block_terminated()) {
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generator.emit<Bytecode::Op::Jump>().set_targets(
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Bytecode::Label { test_block },
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@ -435,9 +460,11 @@ void DoWhileStatement::generate_bytecode(Bytecode::Generator& generator) const
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generator.switch_to_basic_block(end_block);
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generator.emit<Bytecode::Op::Load>(result_reg);
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}
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return {};
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}
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void ForStatement::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> ForStatement::generate_bytecode(Bytecode::Generator& generator) const
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{
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// init
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// jump always (true) test
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@ -459,7 +486,7 @@ void ForStatement::generate_bytecode(Bytecode::Generator& generator) const
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auto& end_block = generator.make_block();
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if (m_init)
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m_init->generate_bytecode(generator);
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TRY(m_init->generate_bytecode(generator));
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body_block_ptr = &generator.make_block();
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@ -483,7 +510,7 @@ void ForStatement::generate_bytecode(Bytecode::Generator& generator) const
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if (m_test) {
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generator.switch_to_basic_block(*test_block_ptr);
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m_test->generate_bytecode(generator);
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TRY(m_test->generate_bytecode(generator));
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generator.emit<Bytecode::Op::JumpConditional>().set_targets(
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Bytecode::Label { *body_block_ptr },
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Bytecode::Label { end_block });
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@ -492,7 +519,7 @@ void ForStatement::generate_bytecode(Bytecode::Generator& generator) const
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generator.switch_to_basic_block(*body_block_ptr);
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generator.begin_continuable_scope(Bytecode::Label { *update_block_ptr });
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generator.begin_breakable_scope(Bytecode::Label { end_block });
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m_body->generate_bytecode(generator);
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TRY(m_body->generate_bytecode(generator));
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generator.end_continuable_scope();
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if (!generator.is_current_block_terminated()) {
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@ -502,7 +529,7 @@ void ForStatement::generate_bytecode(Bytecode::Generator& generator) const
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{});
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generator.switch_to_basic_block(*update_block_ptr);
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m_update->generate_bytecode(generator);
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TRY(m_update->generate_bytecode(generator));
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}
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generator.emit<Bytecode::Op::Jump>().set_targets(
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@ -513,50 +540,58 @@ void ForStatement::generate_bytecode(Bytecode::Generator& generator) const
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generator.switch_to_basic_block(end_block);
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generator.emit<Bytecode::Op::Load>(result_reg);
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}
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return {};
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}
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void ObjectExpression::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> ObjectExpression::generate_bytecode(Bytecode::Generator& generator) const
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{
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generator.emit<Bytecode::Op::NewObject>();
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if (m_properties.is_empty())
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return;
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return {};
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auto object_reg = generator.allocate_register();
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generator.emit<Bytecode::Op::Store>(object_reg);
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for (auto& property : m_properties) {
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if (property.type() != ObjectProperty::Type::KeyValue)
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TODO();
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return Bytecode::CodeGenerationError {
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this,
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"Unimplemented property kind"sv,
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};
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if (is<StringLiteral>(property.key())) {
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auto& string_literal = static_cast<StringLiteral const&>(property.key());
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Bytecode::IdentifierTableIndex key_name = generator.intern_identifier(string_literal.value());
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property.value().generate_bytecode(generator);
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TRY(property.value().generate_bytecode(generator));
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generator.emit<Bytecode::Op::PutById>(object_reg, key_name);
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} else {
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property.key().generate_bytecode(generator);
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TRY(property.key().generate_bytecode(generator));
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auto property_reg = generator.allocate_register();
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generator.emit<Bytecode::Op::Store>(property_reg);
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property.value().generate_bytecode(generator);
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TRY(property.value().generate_bytecode(generator));
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generator.emit<Bytecode::Op::PutByValue>(object_reg, property_reg);
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}
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}
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generator.emit<Bytecode::Op::Load>(object_reg);
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return {};
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}
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void ArrayExpression::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> ArrayExpression::generate_bytecode(Bytecode::Generator& generator) const
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{
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Vector<Bytecode::Register> element_regs;
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for (auto& element : m_elements) {
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if (element) {
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element->generate_bytecode(generator);
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TRY(element->generate_bytecode(generator));
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if (is<SpreadExpression>(*element)) {
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TODO();
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continue;
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return Bytecode::CodeGenerationError {
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this,
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"Unimplemented element kind: SpreadExpression"sv,
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};
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}
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} else {
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generator.emit<Bytecode::Op::LoadImmediate>(Value {});
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@ -566,25 +601,28 @@ void ArrayExpression::generate_bytecode(Bytecode::Generator& generator) const
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element_regs.append(element_reg);
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}
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generator.emit_with_extra_register_slots<Bytecode::Op::NewArray>(element_regs.size(), element_regs);
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return {};
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}
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void MemberExpression::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> MemberExpression::generate_bytecode(Bytecode::Generator& generator) const
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{
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generator.emit_load_from_reference(*this);
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return generator.emit_load_from_reference(*this);
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}
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void FunctionDeclaration::generate_bytecode(Bytecode::Generator&) const
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Bytecode::CodeGenerationErrorOr<void> FunctionDeclaration::generate_bytecode(Bytecode::Generator&) const
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{
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return {};
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}
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void FunctionExpression::generate_bytecode(Bytecode::Generator& generator) const
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Bytecode::CodeGenerationErrorOr<void> FunctionExpression::generate_bytecode(Bytecode::Generator& generator) const
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{
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generator.emit<Bytecode::Op::NewFunction>(*this);
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return {};
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}
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static void generate_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Register const& value_reg);
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static Bytecode::CodeGenerationErrorOr<void> generate_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode, Bytecode::Register const& value_reg);
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static void generate_object_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Register const& value_reg)
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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)
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{
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Vector<Bytecode::Register> excluded_property_names;
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auto has_rest = false;
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@ -601,9 +639,9 @@ static void generate_object_binding_pattern_bytecode(Bytecode::Generator& genera
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auto interned_identifier = generator.intern_identifier(identifier);
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|
||||
generator.emit_with_extra_register_slots<Bytecode::Op::CopyObjectExcludingProperties>(excluded_property_names.size(), value_reg, excluded_property_names);
|
||||
generator.emit<Bytecode::Op::SetVariable>(interned_identifier);
|
||||
generator.emit<Bytecode::Op::SetVariable>(interned_identifier, initialization_mode);
|
||||
|
||||
return;
|
||||
return {};
|
||||
}
|
||||
|
||||
Bytecode::StringTableIndex name_index;
|
||||
|
|
@ -623,7 +661,7 @@ static void generate_object_binding_pattern_bytecode(Bytecode::Generator& genera
|
|||
generator.emit<Bytecode::Op::GetById>(generator.intern_identifier(identifier));
|
||||
} else {
|
||||
auto expression = name.get<NonnullRefPtr<Expression>>();
|
||||
expression->generate_bytecode(generator);
|
||||
TRY(expression->generate_bytecode(generator));
|
||||
|
||||
if (has_rest) {
|
||||
auto excluded_name_reg = generator.allocate_register();
|
||||
|
|
@ -643,7 +681,7 @@ static void generate_object_binding_pattern_bytecode(Bytecode::Generator& genera
|
|||
Bytecode::Label { if_not_undefined_block });
|
||||
|
||||
generator.switch_to_basic_block(if_undefined_block);
|
||||
initializer->generate_bytecode(generator);
|
||||
TRY(initializer->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::Jump>().set_targets(
|
||||
Bytecode::Label { if_not_undefined_block },
|
||||
{});
|
||||
|
|
@ -655,23 +693,27 @@ static void generate_object_binding_pattern_bytecode(Bytecode::Generator& genera
|
|||
auto& binding_pattern = *alias.get<NonnullRefPtr<BindingPattern>>();
|
||||
auto nested_value_reg = generator.allocate_register();
|
||||
generator.emit<Bytecode::Op::Store>(nested_value_reg);
|
||||
generate_binding_pattern_bytecode(generator, binding_pattern, nested_value_reg);
|
||||
TRY(generate_binding_pattern_bytecode(generator, binding_pattern, initialization_mode, nested_value_reg));
|
||||
} else if (alias.has<Empty>()) {
|
||||
if (name.has<NonnullRefPtr<Expression>>()) {
|
||||
// This needs some sort of SetVariableByValue opcode, as it's a runtime binding
|
||||
TODO();
|
||||
return Bytecode::CodeGenerationError {
|
||||
name.get<NonnullRefPtr<Expression>>().ptr(),
|
||||
"Unimplemented name/alias pair: Empty/Expression"sv,
|
||||
};
|
||||
}
|
||||
|
||||
auto& identifier = alias.get<NonnullRefPtr<Identifier>>()->string();
|
||||
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(identifier));
|
||||
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(identifier), initialization_mode);
|
||||
} else {
|
||||
auto& identifier = alias.get<NonnullRefPtr<Identifier>>()->string();
|
||||
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(identifier));
|
||||
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(identifier), initialization_mode);
|
||||
}
|
||||
}
|
||||
return {};
|
||||
}
|
||||
|
||||
static void generate_array_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, 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)
|
||||
{
|
||||
/*
|
||||
* Consider the following destructuring assignment:
|
||||
|
|
@ -705,22 +747,27 @@ static void generate_array_binding_pattern_bytecode(Bytecode::Generator& generat
|
|||
auto temp_iterator_result_reg = generator.allocate_register();
|
||||
|
||||
auto assign_accumulator_to_alias = [&](auto& alias) {
|
||||
alias.visit(
|
||||
[&](Empty) {
|
||||
return alias.visit(
|
||||
[&](Empty) -> Bytecode::CodeGenerationErrorOr<void> {
|
||||
// This element is an elision
|
||||
return {};
|
||||
},
|
||||
[&](NonnullRefPtr<Identifier> const& identifier) {
|
||||
[&](NonnullRefPtr<Identifier> const& identifier) -> Bytecode::CodeGenerationErrorOr<void> {
|
||||
auto interned_index = generator.intern_identifier(identifier->string());
|
||||
generator.emit<Bytecode::Op::SetVariable>(interned_index);
|
||||
generator.emit<Bytecode::Op::SetVariable>(interned_index, initialization_mode);
|
||||
return {};
|
||||
},
|
||||
[&](NonnullRefPtr<BindingPattern> const& pattern) {
|
||||
[&](NonnullRefPtr<BindingPattern> const& pattern) -> Bytecode::CodeGenerationErrorOr<void> {
|
||||
// Store the accumulator value in a permanent register
|
||||
auto target_reg = generator.allocate_register();
|
||||
generator.emit<Bytecode::Op::Store>(target_reg);
|
||||
generate_binding_pattern_bytecode(generator, pattern, target_reg);
|
||||
return generate_binding_pattern_bytecode(generator, pattern, initialization_mode, target_reg);
|
||||
},
|
||||
[&](NonnullRefPtr<MemberExpression> const&) {
|
||||
TODO();
|
||||
[&](NonnullRefPtr<MemberExpression> const& expr) -> Bytecode::CodeGenerationErrorOr<void> {
|
||||
return Bytecode::CodeGenerationError {
|
||||
expr.ptr(),
|
||||
"Unimplemented alias mode: MemberExpression"sv,
|
||||
};
|
||||
});
|
||||
};
|
||||
|
||||
|
|
@ -758,9 +805,7 @@ static void generate_array_binding_pattern_bytecode(Bytecode::Generator& generat
|
|||
generator.switch_to_basic_block(continuation_block);
|
||||
}
|
||||
|
||||
assign_accumulator_to_alias(alias);
|
||||
|
||||
return;
|
||||
return assign_accumulator_to_alias(alias);
|
||||
}
|
||||
|
||||
// In the first iteration of the loop, a few things are true which can save
|
||||
|
|
@ -818,41 +863,48 @@ static void generate_array_binding_pattern_bytecode(Bytecode::Generator& generat
|
|||
// pattern if necessary.
|
||||
generator.switch_to_basic_block(create_binding_block);
|
||||
|
||||
assign_accumulator_to_alias(alias);
|
||||
TRY(assign_accumulator_to_alias(alias));
|
||||
|
||||
first = false;
|
||||
}
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
static void generate_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, 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)
|
||||
{
|
||||
if (pattern.kind == BindingPattern::Kind::Object) {
|
||||
generate_object_binding_pattern_bytecode(generator, pattern, value_reg);
|
||||
} else {
|
||||
generate_array_binding_pattern_bytecode(generator, pattern, value_reg);
|
||||
}
|
||||
};
|
||||
if (pattern.kind == BindingPattern::Kind::Object)
|
||||
return generate_object_binding_pattern_bytecode(generator, pattern, initialization_mode, value_reg);
|
||||
|
||||
void VariableDeclaration::generate_bytecode(Bytecode::Generator& generator) const
|
||||
return generate_array_binding_pattern_bytecode(generator, pattern, initialization_mode, value_reg);
|
||||
}
|
||||
|
||||
Bytecode::CodeGenerationErrorOr<void> VariableDeclaration::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
for (auto& declarator : m_declarations) {
|
||||
if (declarator.init())
|
||||
declarator.init()->generate_bytecode(generator);
|
||||
TRY(declarator.init()->generate_bytecode(generator));
|
||||
else
|
||||
generator.emit<Bytecode::Op::LoadImmediate>(js_undefined());
|
||||
declarator.target().visit(
|
||||
[&](NonnullRefPtr<Identifier> const& id) {
|
||||
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(id->string()));
|
||||
|
||||
auto initialization_mode = is_lexical_declaration() ? Bytecode::Op::SetVariable::InitializationMode::Initialize : Bytecode::Op::SetVariable::InitializationMode::Set;
|
||||
|
||||
TRY(declarator.target().visit(
|
||||
[&](NonnullRefPtr<Identifier> const& id) -> Bytecode::CodeGenerationErrorOr<void> {
|
||||
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(id->string()), initialization_mode);
|
||||
return {};
|
||||
},
|
||||
[&](NonnullRefPtr<BindingPattern> const& pattern) {
|
||||
[&](NonnullRefPtr<BindingPattern> const& pattern) -> Bytecode::CodeGenerationErrorOr<void> {
|
||||
auto value_register = generator.allocate_register();
|
||||
generator.emit<Bytecode::Op::Store>(value_register);
|
||||
generate_binding_pattern_bytecode(generator, pattern, value_register);
|
||||
});
|
||||
return generate_binding_pattern_bytecode(generator, pattern, initialization_mode, value_register);
|
||||
}));
|
||||
}
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
void CallExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> CallExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
auto callee_reg = generator.allocate_register();
|
||||
auto this_reg = generator.allocate_register();
|
||||
|
|
@ -860,35 +912,41 @@ void CallExpression::generate_bytecode(Bytecode::Generator& generator) const
|
|||
generator.emit<Bytecode::Op::Store>(this_reg);
|
||||
|
||||
if (is<NewExpression>(this)) {
|
||||
m_callee->generate_bytecode(generator);
|
||||
TRY(m_callee->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::Store>(callee_reg);
|
||||
} else if (is<SuperExpression>(*m_callee)) {
|
||||
TODO();
|
||||
return Bytecode::CodeGenerationError {
|
||||
this,
|
||||
"Unimplemented callee kind: SuperExpression"sv,
|
||||
};
|
||||
} else if (is<MemberExpression>(*m_callee)) {
|
||||
auto& member_expression = static_cast<const MemberExpression&>(*m_callee);
|
||||
if (is<SuperExpression>(member_expression.object())) {
|
||||
TODO();
|
||||
} else {
|
||||
member_expression.object().generate_bytecode(generator);
|
||||
generator.emit<Bytecode::Op::Store>(this_reg);
|
||||
if (member_expression.is_computed()) {
|
||||
member_expression.property().generate_bytecode(generator);
|
||||
generator.emit<Bytecode::Op::GetByValue>(this_reg);
|
||||
} else {
|
||||
auto identifier_table_ref = generator.intern_identifier(verify_cast<Identifier>(member_expression.property()).string());
|
||||
generator.emit<Bytecode::Op::GetById>(identifier_table_ref);
|
||||
}
|
||||
generator.emit<Bytecode::Op::Store>(callee_reg);
|
||||
return Bytecode::CodeGenerationError {
|
||||
this,
|
||||
"Unimplemented callee kind: MemberExpression on SuperExpression"sv,
|
||||
};
|
||||
}
|
||||
|
||||
TRY(member_expression.object().generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::Store>(this_reg);
|
||||
if (member_expression.is_computed()) {
|
||||
TRY(member_expression.property().generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::GetByValue>(this_reg);
|
||||
} else {
|
||||
auto identifier_table_ref = generator.intern_identifier(verify_cast<Identifier>(member_expression.property()).string());
|
||||
generator.emit<Bytecode::Op::GetById>(identifier_table_ref);
|
||||
}
|
||||
generator.emit<Bytecode::Op::Store>(callee_reg);
|
||||
} else {
|
||||
// FIXME: this = global object in sloppy mode.
|
||||
m_callee->generate_bytecode(generator);
|
||||
TRY(m_callee->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::Store>(callee_reg);
|
||||
}
|
||||
|
||||
Vector<Bytecode::Register> argument_registers;
|
||||
for (auto& arg : m_arguments) {
|
||||
arg.value->generate_bytecode(generator);
|
||||
TRY(arg.value->generate_bytecode(generator));
|
||||
auto arg_reg = generator.allocate_register();
|
||||
generator.emit<Bytecode::Op::Store>(arg_reg);
|
||||
argument_registers.append(arg_reg);
|
||||
|
|
@ -902,35 +960,43 @@ void CallExpression::generate_bytecode(Bytecode::Generator& generator) const
|
|||
}
|
||||
|
||||
generator.emit_with_extra_register_slots<Bytecode::Op::Call>(argument_registers.size(), call_type, callee_reg, this_reg, argument_registers);
|
||||
return {};
|
||||
}
|
||||
|
||||
void ReturnStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> ReturnStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
if (m_argument)
|
||||
m_argument->generate_bytecode(generator);
|
||||
TRY(m_argument->generate_bytecode(generator));
|
||||
|
||||
if (generator.is_in_generator_or_async_function())
|
||||
generator.emit<Bytecode::Op::Yield>(nullptr);
|
||||
else
|
||||
generator.emit<Bytecode::Op::Return>();
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
void YieldExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> YieldExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
VERIFY(generator.is_in_generator_function());
|
||||
|
||||
if (m_is_yield_from)
|
||||
TODO();
|
||||
if (m_is_yield_from) {
|
||||
return Bytecode::CodeGenerationError {
|
||||
this,
|
||||
"Unimplemented form: `yield*`"sv,
|
||||
};
|
||||
}
|
||||
|
||||
if (m_argument)
|
||||
m_argument->generate_bytecode(generator);
|
||||
TRY(m_argument->generate_bytecode(generator));
|
||||
|
||||
auto& continuation_block = generator.make_block();
|
||||
generator.emit<Bytecode::Op::Yield>(Bytecode::Label { continuation_block });
|
||||
generator.switch_to_basic_block(continuation_block);
|
||||
return {};
|
||||
}
|
||||
|
||||
void IfStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> IfStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
// test
|
||||
// jump if_true (true) true (false) false
|
||||
|
|
@ -943,7 +1009,7 @@ void IfStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
auto& true_block = generator.make_block();
|
||||
auto& false_block = generator.make_block();
|
||||
|
||||
m_predicate->generate_bytecode(generator);
|
||||
TRY(m_predicate->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::JumpConditional>().set_targets(
|
||||
Bytecode::Label { true_block },
|
||||
Bytecode::Label { false_block });
|
||||
|
|
@ -952,7 +1018,7 @@ void IfStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
|
||||
generator.switch_to_basic_block(true_block);
|
||||
generator.emit<Bytecode::Op::LoadImmediate>(js_undefined());
|
||||
m_consequent->generate_bytecode(generator);
|
||||
TRY(m_consequent->generate_bytecode(generator));
|
||||
if (!generator.is_current_block_terminated())
|
||||
true_block_jump = &generator.emit<Bytecode::Op::Jump>();
|
||||
|
||||
|
|
@ -961,7 +1027,7 @@ void IfStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
|
||||
generator.emit<Bytecode::Op::LoadImmediate>(js_undefined());
|
||||
if (m_alternate)
|
||||
m_alternate->generate_bytecode(generator);
|
||||
TRY(m_alternate->generate_bytecode(generator));
|
||||
if (!generator.is_current_block_terminated())
|
||||
generator.emit<Bytecode::Op::Jump>().set_targets(Bytecode::Label { end_block }, {});
|
||||
|
||||
|
|
@ -969,20 +1035,23 @@ void IfStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
true_block_jump->set_targets(Bytecode::Label { end_block }, {});
|
||||
|
||||
generator.switch_to_basic_block(end_block);
|
||||
return {};
|
||||
}
|
||||
|
||||
void ContinueStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> ContinueStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
generator.emit<Bytecode::Op::Jump>().set_targets(
|
||||
generator.nearest_continuable_scope(),
|
||||
{});
|
||||
return {};
|
||||
}
|
||||
|
||||
void DebuggerStatement::generate_bytecode(Bytecode::Generator&) const
|
||||
Bytecode::CodeGenerationErrorOr<void> DebuggerStatement::generate_bytecode(Bytecode::Generator&) const
|
||||
{
|
||||
return {};
|
||||
}
|
||||
|
||||
void ConditionalExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> ConditionalExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
// test
|
||||
// jump if_true (true) true (false) false
|
||||
|
|
@ -996,38 +1065,41 @@ void ConditionalExpression::generate_bytecode(Bytecode::Generator& generator) co
|
|||
auto& false_block = generator.make_block();
|
||||
auto& end_block = generator.make_block();
|
||||
|
||||
m_test->generate_bytecode(generator);
|
||||
TRY(m_test->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::JumpConditional>().set_targets(
|
||||
Bytecode::Label { true_block },
|
||||
Bytecode::Label { false_block });
|
||||
|
||||
generator.switch_to_basic_block(true_block);
|
||||
m_consequent->generate_bytecode(generator);
|
||||
TRY(m_consequent->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::Jump>().set_targets(
|
||||
Bytecode::Label { end_block },
|
||||
{});
|
||||
|
||||
generator.switch_to_basic_block(false_block);
|
||||
m_alternate->generate_bytecode(generator);
|
||||
TRY(m_alternate->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::Jump>().set_targets(
|
||||
Bytecode::Label { end_block },
|
||||
{});
|
||||
|
||||
generator.switch_to_basic_block(end_block);
|
||||
return {};
|
||||
}
|
||||
|
||||
void SequenceExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> SequenceExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
for (auto& expression : m_expressions)
|
||||
expression.generate_bytecode(generator);
|
||||
TRY(expression.generate_bytecode(generator));
|
||||
|
||||
return {};
|
||||
}
|
||||
|
||||
void TemplateLiteral::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> TemplateLiteral::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
auto string_reg = generator.allocate_register();
|
||||
|
||||
for (size_t i = 0; i < m_expressions.size(); i++) {
|
||||
m_expressions[i].generate_bytecode(generator);
|
||||
TRY(m_expressions[i].generate_bytecode(generator));
|
||||
if (i == 0) {
|
||||
generator.emit<Bytecode::Op::Store>(string_reg);
|
||||
} else {
|
||||
|
|
@ -1036,11 +1108,12 @@ void TemplateLiteral::generate_bytecode(Bytecode::Generator& generator) const
|
|||
}
|
||||
|
||||
generator.emit<Bytecode::Op::Load>(string_reg);
|
||||
return {};
|
||||
}
|
||||
|
||||
void TaggedTemplateLiteral::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> TaggedTemplateLiteral::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
m_tag->generate_bytecode(generator);
|
||||
TRY(m_tag->generate_bytecode(generator));
|
||||
auto tag_reg = generator.allocate_register();
|
||||
generator.emit<Bytecode::Op::Store>(tag_reg);
|
||||
|
||||
|
|
@ -1050,7 +1123,7 @@ void TaggedTemplateLiteral::generate_bytecode(Bytecode::Generator& generator) co
|
|||
if (i % 2 != 0)
|
||||
continue;
|
||||
|
||||
expressions[i].generate_bytecode(generator);
|
||||
TRY(expressions[i].generate_bytecode(generator));
|
||||
auto string_reg = generator.allocate_register();
|
||||
generator.emit<Bytecode::Op::Store>(string_reg);
|
||||
string_regs.append(string_reg);
|
||||
|
|
@ -1066,7 +1139,7 @@ void TaggedTemplateLiteral::generate_bytecode(Bytecode::Generator& generator) co
|
|||
if (i % 2 == 0)
|
||||
continue;
|
||||
|
||||
expressions[i].generate_bytecode(generator);
|
||||
TRY(expressions[i].generate_bytecode(generator));
|
||||
auto string_reg = generator.allocate_register();
|
||||
generator.emit<Bytecode::Op::Store>(string_reg);
|
||||
argument_regs.append(string_reg);
|
||||
|
|
@ -1074,7 +1147,7 @@ void TaggedTemplateLiteral::generate_bytecode(Bytecode::Generator& generator) co
|
|||
|
||||
Vector<Bytecode::Register> raw_string_regs;
|
||||
for (auto& raw_string : m_template_literal->raw_strings()) {
|
||||
raw_string.generate_bytecode(generator);
|
||||
TRY(raw_string.generate_bytecode(generator));
|
||||
auto raw_string_reg = generator.allocate_register();
|
||||
generator.emit<Bytecode::Op::Store>(raw_string_reg);
|
||||
raw_string_regs.append(raw_string_reg);
|
||||
|
|
@ -1092,11 +1165,12 @@ void TaggedTemplateLiteral::generate_bytecode(Bytecode::Generator& generator) co
|
|||
generator.emit<Bytecode::Op::Store>(this_reg);
|
||||
|
||||
generator.emit_with_extra_register_slots<Bytecode::Op::Call>(argument_regs.size(), Bytecode::Op::Call::CallType::Call, tag_reg, this_reg, move(argument_regs));
|
||||
return {};
|
||||
}
|
||||
|
||||
void UpdateExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> UpdateExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
generator.emit_load_from_reference(*m_argument);
|
||||
TRY(generator.emit_load_from_reference(*m_argument));
|
||||
|
||||
Optional<Bytecode::Register> previous_value_for_postfix_reg;
|
||||
if (!m_prefixed) {
|
||||
|
|
@ -1109,26 +1183,29 @@ void UpdateExpression::generate_bytecode(Bytecode::Generator& generator) const
|
|||
else
|
||||
generator.emit<Bytecode::Op::Decrement>();
|
||||
|
||||
generator.emit_store_to_reference(*m_argument);
|
||||
TRY(generator.emit_store_to_reference(*m_argument));
|
||||
|
||||
if (!m_prefixed)
|
||||
generator.emit<Bytecode::Op::Load>(*previous_value_for_postfix_reg);
|
||||
return {};
|
||||
}
|
||||
|
||||
void ThrowStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> ThrowStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
m_argument->generate_bytecode(generator);
|
||||
TRY(m_argument->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::Throw>();
|
||||
return {};
|
||||
}
|
||||
|
||||
void BreakStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> BreakStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
generator.emit<Bytecode::Op::Jump>().set_targets(
|
||||
generator.nearest_breakable_scope(),
|
||||
{});
|
||||
return {};
|
||||
}
|
||||
|
||||
void TryStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> TryStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
auto& saved_block = generator.current_block();
|
||||
|
||||
|
|
@ -1140,7 +1217,7 @@ void TryStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
if (m_finalizer) {
|
||||
auto& finalizer_block = generator.make_block();
|
||||
generator.switch_to_basic_block(finalizer_block);
|
||||
m_finalizer->generate_bytecode(generator);
|
||||
TRY(m_finalizer->generate_bytecode(generator));
|
||||
if (!generator.is_current_block_terminated()) {
|
||||
next_block = &generator.make_block();
|
||||
auto next_target = Bytecode::Label { *next_block };
|
||||
|
|
@ -1152,19 +1229,23 @@ void TryStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
if (m_handler) {
|
||||
auto& handler_block = generator.make_block();
|
||||
generator.switch_to_basic_block(handler_block);
|
||||
m_handler->parameter().visit(
|
||||
[&](FlyString const& parameter) {
|
||||
TRY(m_handler->parameter().visit(
|
||||
[&](FlyString const& parameter) -> Bytecode::CodeGenerationErrorOr<void> {
|
||||
if (!parameter.is_empty()) {
|
||||
// FIXME: We need a separate DeclarativeEnvironment here
|
||||
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(parameter));
|
||||
}
|
||||
return {};
|
||||
},
|
||||
[&](NonnullRefPtr<BindingPattern> const&) {
|
||||
[&](NonnullRefPtr<BindingPattern> const&) -> Bytecode::CodeGenerationErrorOr<void> {
|
||||
// FIXME: Implement this path when the above DeclarativeEnvironment issue is dealt with.
|
||||
TODO();
|
||||
});
|
||||
return Bytecode::CodeGenerationError {
|
||||
this,
|
||||
"Unimplemented catch argument: BindingPattern"sv,
|
||||
};
|
||||
}));
|
||||
|
||||
m_handler->body().generate_bytecode(generator);
|
||||
TRY(m_handler->body().generate_bytecode(generator));
|
||||
handler_target = Bytecode::Label { handler_block };
|
||||
if (!generator.is_current_block_terminated()) {
|
||||
if (m_finalizer) {
|
||||
|
|
@ -1184,7 +1265,7 @@ void TryStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
generator.emit<Bytecode::Op::EnterUnwindContext>(Bytecode::Label { target_block }, handler_target, finalizer_target);
|
||||
|
||||
generator.switch_to_basic_block(target_block);
|
||||
m_block->generate_bytecode(generator);
|
||||
TRY(m_block->generate_bytecode(generator));
|
||||
if (!generator.is_current_block_terminated()) {
|
||||
if (m_finalizer) {
|
||||
generator.emit<Bytecode::Op::Jump>(finalizer_target);
|
||||
|
|
@ -1196,12 +1277,13 @@ void TryStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
}
|
||||
|
||||
generator.switch_to_basic_block(next_block ? *next_block : saved_block);
|
||||
return {};
|
||||
}
|
||||
|
||||
void SwitchStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> SwitchStatement::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
auto discriminant_reg = generator.allocate_register();
|
||||
m_discriminant->generate_bytecode(generator);
|
||||
TRY(m_discriminant->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::Store>(discriminant_reg);
|
||||
Vector<Bytecode::BasicBlock&> case_blocks;
|
||||
Bytecode::BasicBlock* default_block { nullptr };
|
||||
|
|
@ -1211,7 +1293,7 @@ void SwitchStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
auto& case_block = generator.make_block();
|
||||
if (switch_case.test()) {
|
||||
generator.switch_to_basic_block(*next_test_block);
|
||||
switch_case.test()->generate_bytecode(generator);
|
||||
TRY(switch_case.test()->generate_bytecode(generator));
|
||||
generator.emit<Bytecode::Op::StrictlyEquals>(discriminant_reg);
|
||||
next_test_block = &generator.make_block();
|
||||
generator.emit<Bytecode::Op::JumpConditional>().set_targets(Bytecode::Label { case_block }, Bytecode::Label { *next_test_block });
|
||||
|
|
@ -1236,7 +1318,7 @@ void SwitchStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
|
||||
generator.emit<Bytecode::Op::LoadImmediate>(js_undefined());
|
||||
for (auto& statement : switch_case.children()) {
|
||||
statement.generate_bytecode(generator);
|
||||
TRY(statement.generate_bytecode(generator));
|
||||
}
|
||||
if (!generator.is_current_block_terminated()) {
|
||||
auto next_block = current_block;
|
||||
|
|
@ -1252,6 +1334,7 @@ void SwitchStatement::generate_bytecode(Bytecode::Generator& generator) const
|
|||
generator.end_breakable_scope();
|
||||
|
||||
generator.switch_to_basic_block(end_block);
|
||||
return {};
|
||||
}
|
||||
|
||||
void ClassDeclaration::generate_bytecode(Bytecode::Generator& generator) const
|
||||
|
|
@ -1260,21 +1343,23 @@ void ClassDeclaration::generate_bytecode(Bytecode::Generator& generator) const
|
|||
generator.emit<Bytecode::Op::SetVariable>(generator.intern_identifier(m_class_expression.ptr()->name()));
|
||||
}
|
||||
|
||||
void ThisExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> ThisExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
generator.emit<Bytecode::Op::ResolveThisBinding>();
|
||||
return {};
|
||||
}
|
||||
|
||||
void AwaitExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
Bytecode::CodeGenerationErrorOr<void> AwaitExpression::generate_bytecode(Bytecode::Generator& generator) const
|
||||
{
|
||||
VERIFY(generator.is_in_async_function());
|
||||
|
||||
// Transform `await expr` to `yield expr`
|
||||
m_argument->generate_bytecode(generator);
|
||||
TRY(m_argument->generate_bytecode(generator));
|
||||
|
||||
auto& continuation_block = generator.make_block();
|
||||
generator.emit<Bytecode::Op::Yield>(Bytecode::Label { continuation_block });
|
||||
generator.switch_to_basic_block(continuation_block);
|
||||
return {};
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue