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LibJS/Bytecode: Store labels as basic block index during compilation
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. :^)
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3a73eb99ac
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sideshowbarker
2024-07-16 21:42:29 +09:00
Author: https://github.com/awesomekling
Commit: 3a73eb99ac
Pull-request: https://github.com/SerenityOS/serenity/pull/24240
Reviewed-by: https://github.com/Hendiadyoin1
Reviewed-by: https://github.com/trflynn89 ✅
7 changed files with 40 additions and 22 deletions
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@ -25,9 +25,11 @@ class BasicBlock {
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AK_MAKE_NONCOPYABLE(BasicBlock);
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public:
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static NonnullOwnPtr<BasicBlock> create(String name);
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static NonnullOwnPtr<BasicBlock> create(u32 index, String name);
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~BasicBlock();
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u32 index() const { return m_index; }
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ReadonlyBytes instruction_stream() const { return m_buffer.span(); }
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u8* data() { return m_buffer.data(); }
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u8 const* data() const { return m_buffer.data(); }
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@ -50,8 +52,9 @@ public:
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void add_source_map_entry(size_t bytecode_offset, SourceRecord const& source_record) { m_source_map.set(bytecode_offset, source_record); }
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private:
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explicit BasicBlock(String name);
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explicit BasicBlock(u32 index, String name);
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u32 m_index { 0 };
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Vector<u8> m_buffer;
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BasicBlock const* m_handler { nullptr };
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BasicBlock const* m_finalizer { nullptr };
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