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LibJS: Add a separate "identifier table" to bytecode executables
This is a specialized string table for storing identifiers only. Identifiers are always FlyStrings, which makes many common operations faster by allowing O(1) comparison.
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10 changed files with 121 additions and 37 deletions
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@ -11,6 +11,7 @@
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#include <AK/SinglyLinkedList.h>
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#include <LibJS/Bytecode/BasicBlock.h>
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#include <LibJS/Bytecode/Executable.h>
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#include <LibJS/Bytecode/IdentifierTable.h>
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#include <LibJS/Bytecode/Label.h>
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#include <LibJS/Bytecode/Op.h>
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#include <LibJS/Bytecode/Register.h>
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@ -102,6 +103,11 @@ public:
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return m_string_table->insert(move(string));
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}
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IdentifierTableIndex intern_identifier(FlyString string)
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{
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return m_identifier_table->insert(move(string));
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}
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bool is_in_generator_function() const { return m_is_in_generator_function; }
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void enter_generator_context() { m_is_in_generator_function = true; }
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void leave_generator_context() { m_is_in_generator_function = false; }
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@ -116,6 +122,7 @@ private:
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BasicBlock* m_current_basic_block { nullptr };
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NonnullOwnPtrVector<BasicBlock> m_root_basic_blocks;
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NonnullOwnPtr<StringTable> m_string_table;
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NonnullOwnPtr<IdentifierTable> m_identifier_table;
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u32 m_next_register { 2 };
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u32 m_next_block { 1 };
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