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LibJS/JIT: Support the NewString bytecode op

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This necessitated making the JIT::Compiler aware of the current
Bytecode::Executable, since that's where all the string literals are
held, but that seems like a good thing.
This commit is contained in:
Andreas Kling 2023-10-18 12:55:00 +02:00
parent efe58ebf2f
commit c2fe7af095
3 changed files with 30 additions and 3 deletions
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2
Userland/Libraries/LibJS/Bytecode/Op.h
View file

@ -157,6 +157,8 @@ public:
ThrowCompletionOr<void> execute_impl(Bytecode::Interpreter&) const;
DeprecatedString to_deprecated_string_impl(Bytecode::Executable const&) const;
StringTableIndex index() const { return m_string; }
private:
StringTableIndex m_string;
};

22
Userland/Libraries/LibJS/JIT/Compiler.cpp
View file

@ -383,12 +383,27 @@ void Compiler::compile_return(Bytecode::Op::Return const&)
m_assembler.exit();
}
OwnPtr<NativeExecutable> Compiler::compile(Bytecode::Executable const& bytecode_executable)
static Value cxx_new_string(VM& vm, DeprecatedString const& string)
{
return PrimitiveString::create(vm, string);
}
void Compiler::compile_new_string(Bytecode::Op::NewString const& op)
{
auto const& string = m_bytecode_executable.string_table->get(op.index());
m_assembler.mov(
Assembler::Operand::Register(ARG1),
Assembler::Operand::Imm64(bit_cast<u64>(&string)));
m_assembler.native_call((void*)cxx_new_string);
store_vm_register(Bytecode::Register::accumulator(), RET);
}
OwnPtr<NativeExecutable> Compiler::compile(Bytecode::Executable& bytecode_executable)
{
if (getenv("LIBJS_NO_JIT"))
return nullptr;
Compiler compiler;
Compiler compiler { bytecode_executable };
compiler.m_assembler.enter();
@ -459,6 +474,9 @@ OwnPtr<NativeExecutable> Compiler::compile(Bytecode::Executable const& bytecode_
case Bytecode::Instruction::Type::Return:
compiler.compile_return(static_cast<Bytecode::Op::Return const&>(op));
break;
case Bytecode::Instruction::Type::NewString:
compiler.compile_new_string(static_cast<Bytecode::Op::NewString const&>(op));
break;
default:
dbgln("JIT compilation failed: {}", bytecode_executable.name);
dbgln("Unsupported bytecode op: {}", op.to_deprecated_string(bytecode_executable));

9
Userland/Libraries/LibJS/JIT/Compiler.h
View file

@ -15,7 +15,7 @@ namespace JS::JIT {
class Compiler {
public:
static OwnPtr<NativeExecutable> compile(Bytecode::Executable const&);
static OwnPtr<NativeExecutable> compile(Bytecode::Executable&);
private:
static constexpr auto GPR0 = Assembler::Reg::RAX;
@ -46,6 +46,7 @@ private:
void compile_mul(Bytecode::Op::Mul const&);
void compile_div(Bytecode::Op::Div const&);
void compile_return(Bytecode::Op::Return const&);
void compile_new_string(Bytecode::Op::NewString const&);
void store_vm_register(Bytecode::Register, Assembler::Reg);
void load_vm_register(Assembler::Reg, Bytecode::Register);
@ -60,8 +61,14 @@ private:
void push_unwind_context(bool valid, Optional<Bytecode::Label> const& handler, Optional<Bytecode::Label> const& finalizer);
void pop_unwind_context();
explicit Compiler(Bytecode::Executable& bytecode_executable)
: m_bytecode_executable(bytecode_executable)
{
}
Vector<u8> m_output;
Assembler m_assembler { m_output };
Bytecode::Executable& m_bytecode_executable;
};
}