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LibJS: Wire NewClass to ClassBlueprint

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Replace the ClassExpression const& reference in the NewClass
instruction with a u32 class_blueprint_index. The interpreter now
reads from the ClassBlueprint stored on the Executable and calls
construct_class() instead of the AST-based create_class_constructor().

Literal field initializers (numbers, booleans, null, strings, negated
numbers) are used directly in construct_class() without creating an
ECMAScriptFunctionObject, avoiding function creation overhead for
common field patterns like `x = 0` or `name = "hello"`.

Set class_field_initializer_name on SharedFunctionInstanceData at
codegen time for statically-known field keys (identifiers, private
identifiers, string literals, and numeric literals). For computed
keys, the name is set at runtime in construct_class().

ClassExpression AST nodes are no longer referenced from bytecode.
This commit is contained in:
Andreas Kling 2026-02-11 00:28:10 +01:00 • committed by Andreas Kling
parent fa6a3f31dc
commit ec2f4e4a7b
Notes: github-actions[bot] 2026-02-11 23:01:20 +00:00
10 changed files with 157 additions and 38 deletions
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6
Libraries/LibJS/Bytecode/Executable.cpp
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@ -100,6 +100,12 @@ void Executable::visit_edges(Visitor& visitor)
visitor.visit(cache.cached_template_object);
for (auto& data : shared_function_data)
visitor.visit(data);
for (auto& blueprint : class_blueprints) {
for (auto& element : blueprint.elements) {
if (element.literal_value.has_value() && element.literal_value->is_cell())
visitor.visit(element.literal_value->as_cell());
}
}
property_key_table->visit_edges(visitor);
}