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LibJS: Introduce Builtins

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Builtins are functions that can be detected during bytecode generation
and enable fast-paths in the JIT.
This commit is contained in:
Simon Wanner 2023-11-17 11:48:30 +01:00 • committed by Andreas Kling
parent b9141d85d8
commit 86b85aa68b
13 changed files with 191 additions and 4 deletions
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26
Userland/Libraries/LibJS/Bytecode/Builtins.cpp Normal file
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/*
* Copyright (c) 2023, Simon Wanner <simon@skyrising.xyz>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/AST.h>
#include <LibJS/Bytecode/Builtins.h>
namespace JS::Bytecode {
Optional<Builtin> get_builtin(MemberExpression const& expression)
{
if (expression.is_computed() || !expression.object().is_identifier() || !expression.property().is_identifier())
return {};
auto base_name = static_cast<Identifier const&>(expression.object()).string();
auto property_name = static_cast<Identifier const&>(expression.property()).string();
#define CHECK_MEMBER_BUILTIN(name, snake_case_name, base, property, ...) \
if (base_name == #base##sv && property_name == #property##sv) \
return Builtin::name;
JS_ENUMERATE_BUILTINS(CHECK_MEMBER_BUILTIN)
#undef CHECK_MEMBER_BUILTIN
return {};
}
}