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LibJS: Store strings in a string table

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Instead of using Strings in the bytecode ops this adds a global string
table to the Executable struct which individual operations can refer
to using indices. This brings bytecode ops one step closer to being
pointer free.
This commit is contained in:
Gunnar Beutner 2021-06-09 10:02:01 +02:00 • committed by Andreas Kling
parent 4efccbd030
commit 6a0d1fa259
16 changed files with 173 additions and 82 deletions
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10
Userland/Libraries/LibJS/Bytecode/Generator.h
View file

@ -12,13 +12,17 @@
#include <LibJS/Bytecode/BasicBlock.h>
#include <LibJS/Bytecode/Label.h>
#include <LibJS/Bytecode/Register.h>
#include <LibJS/Bytecode/StringTable.h>
#include <LibJS/Forward.h>
namespace JS::Bytecode {
struct Executable {
NonnullOwnPtrVector<BasicBlock> basic_blocks;
NonnullOwnPtr<StringTable> string_table;
size_t number_of_registers { 0 };
String const& get_string(StringTableIndex index) const { return string_table->get(index); }
};
class Generator {
@ -74,6 +78,11 @@ public:
return m_current_basic_block->is_terminated();
}
StringTableIndex intern_string(StringView const& string)
{
return m_string_table->insert(string);
}
private:
Generator();
~Generator();
@ -83,6 +92,7 @@ private:
BasicBlock* m_current_basic_block { nullptr };
NonnullOwnPtrVector<BasicBlock> m_root_basic_blocks;
NonnullOwnPtr<StringTable> m_string_table;
u32 m_next_register { 1 };
u32 m_next_block { 1 };