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cf6792ec40
Since we can't rely on shape identity (i.e its pointer address) for unique shapes, give them a serial number that increments whenever a mutation occurs. Inline caches can then compare this serial number against what they have seen before.
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
/*
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* Copyright (c) 2021-2023, 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/DeprecatedFlyString.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/WeakPtr.h>
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#include <LibJS/Bytecode/BasicBlock.h>
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#include <LibJS/Bytecode/IdentifierTable.h>
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#include <LibJS/Bytecode/StringTable.h>
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namespace JS::Bytecode {
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struct PropertyLookupCache {
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WeakPtr<Shape> shape;
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Optional<u32> property_offset;
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u64 unique_shape_serial_number { 0 };
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};
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struct Executable {
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DeprecatedFlyString name;
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Vector<PropertyLookupCache> property_lookup_caches;
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Vector<NonnullOwnPtr<BasicBlock>> basic_blocks;
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NonnullOwnPtr<StringTable> string_table;
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NonnullOwnPtr<IdentifierTable> identifier_table;
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size_t number_of_registers { 0 };
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bool is_strict_mode { false };
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DeprecatedString const& get_string(StringTableIndex index) const { return string_table->get(index); }
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DeprecatedFlyString const& get_identifier(IdentifierTableIndex index) const { return identifier_table->get(index); }
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void dump() const;
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};
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}
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