3a73eb99ac
Instead of storing a BasicBlock* and forcing the size of Label to be sizeof(BasicBlock*), we now store the basic block index as a u32. This means the final version of the bytecode is able to keep labels at sizeof(u32), shrinking the size of many instructions. :^)
44 lines
1,000 B
C++
44 lines
1,000 B
C++
/*
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* Copyright (c) 2021, 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/Format.h>
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namespace JS::Bytecode {
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class BasicBlock;
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class Label {
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public:
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explicit Label(BasicBlock const&);
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explicit Label(u32 basic_block_index)
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: m_address_or_basic_block_index(basic_block_index)
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{
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}
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// Used while compiling.
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size_t basic_block_index() const { return m_address_or_basic_block_index; }
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// Used after compiling.
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size_t address() const { return m_address_or_basic_block_index; }
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void set_address(size_t address) { m_address_or_basic_block_index = address; }
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private:
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u32 m_address_or_basic_block_index { 0 };
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};
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}
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template<>
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struct AK::Formatter<JS::Bytecode::Label> : AK::Formatter<FormatString> {
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ErrorOr<void> format(FormatBuilder& builder, JS::Bytecode::Label const& label)
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{
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return AK::Formatter<FormatString>::format(builder, "@{:x}"sv, label.address());
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}
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};
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