cea59b6642
This patch adds a register freelist to Bytecode::Generator and switches all operands inside the generator to a new ScopedOperand type that is ref-counted and automatically frees the register when nothing uses it. This dramatically reduces the size of bytecode executable register windows, which were often in the several thousands of registers for large functions. Most functions now use less than 100 registers.
46 lines
966 B
C++
46 lines
966 B
C++
/*
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* Copyright (c) 2024, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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#include <LibJS/Forward.h>
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namespace JS::Bytecode {
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class Operand {
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public:
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enum class Type {
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Register,
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Local,
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Constant,
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};
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[[nodiscard]] bool operator==(Operand const&) const = default;
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explicit Operand(Type type, u32 index)
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: m_type(type)
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, m_index(index)
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{
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}
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explicit Operand(Register);
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[[nodiscard]] bool is_register() const { return m_type == Type::Register; }
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[[nodiscard]] bool is_local() const { return m_type == Type::Local; }
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[[nodiscard]] bool is_constant() const { return m_type == Type::Constant; }
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[[nodiscard]] Type type() const { return m_type; }
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[[nodiscard]] u32 index() const { return m_index; }
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[[nodiscard]] Register as_register() const;
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private:
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Type m_type {};
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u32 m_index { 0 };
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};
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}
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