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.

1 files changed, 3 insertions, 0 deletions

diff --git a/Userland/Libraries/LibJS/Bytecode/Executable.h b/Userland/Libraries/LibJS/Bytecode/Executable.h
index c861222d52..6f1c3f9939 100644
--- a/Userland/Libraries/LibJS/Bytecode/Executable.h
+++ b/Userland/Libraries/LibJS/Bytecode/Executable.h
@@ -9,6 +9,7 @@
 #include <AK/FlyString.h>
 #include <AK/NonnullOwnPtrVector.h>
 #include <LibJS/Bytecode/BasicBlock.h>
+#include <LibJS/Bytecode/IdentifierTable.h>
 #include <LibJS/Bytecode/StringTable.h>
 
 namespace JS::Bytecode {
@@ -17,9 +18,11 @@ struct Executable {
     FlyString name;
     NonnullOwnPtrVector<BasicBlock> basic_blocks;
     NonnullOwnPtr<StringTable> string_table;
+    NonnullOwnPtr<IdentifierTable> identifier_table;
     size_t number_of_registers { 0 };
 
     String const& get_string(StringTableIndex index) const { return string_table->get(index); }
+    FlyString const& get_identifier(IdentifierTableIndex index) const { return identifier_table->get(index); }
 
     void dump() const;
 };