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LibJS: Avoid copying the frame into the interpreter in BC generators

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This commit is contained in:
Ali Mohammad Pur 2022-04-15 20:20:51 +04:30 • committed by Ali Mohammad Pur
parent 063ea0088e
commit d5791c85b4
3 changed files with 36 additions and 43 deletions
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35
Userland/Libraries/LibJS/Bytecode/Interpreter.h
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@ -46,27 +46,13 @@ public:
ThrowCompletionOr<Value> value;
OwnPtr<RegisterWindow> frame;
};
ValueAndFrame run_and_return_frame(Bytecode::Executable const&, Bytecode::BasicBlock const* entry_point);
ValueAndFrame run_and_return_frame(Bytecode::Executable const&, Bytecode::BasicBlock const* entry_point, RegisterWindow* = nullptr);
ALWAYS_INLINE Value& accumulator() { return reg(Register::accumulator()); }
Value& reg(Register const& r) { return registers()[r.index()]; }
[[nodiscard]] RegisterWindow snapshot_frame() const { return m_register_windows.last(); }
auto& saved_lexical_environment_stack() { return m_register_windows.last().saved_lexical_environments; }
auto& saved_variable_environment_stack() { return m_register_windows.last().saved_variable_environments; }
void enter_frame(RegisterWindow const& frame)
{
m_manually_entered_frames.append(true);
m_register_windows.append(make<RegisterWindow>(frame));
}
NonnullOwnPtr<RegisterWindow> pop_frame()
{
VERIFY(!m_manually_entered_frames.is_empty());
VERIFY(m_manually_entered_frames.last());
m_manually_entered_frames.take_last();
return m_register_windows.take_last();
}
auto& saved_lexical_environment_stack() { return window().saved_lexical_environments; }
auto& saved_variable_environment_stack() { return window().saved_variable_environments; }
void jump(Label const& label)
{
@ -89,15 +75,24 @@ public:
VM::InterpreterExecutionScope ast_interpreter_scope();
private:
MarkedVector<Value>& registers() { return m_register_windows.last().registers; }
RegisterWindow& window()
{
return m_register_windows.last().visit([](auto& x) -> RegisterWindow& { return *x; });
}
RegisterWindow const& window() const
{
return const_cast<Interpreter*>(this)->window();
}
MarkedVector<Value>& registers() { return window().registers; }
static AK::Array<OwnPtr<PassManager>, static_cast<UnderlyingType<Interpreter::OptimizationLevel>>(Interpreter::OptimizationLevel::__Count)> s_optimization_pipelines;
VM& m_vm;
GlobalObject& m_global_object;
Realm& m_realm;
NonnullOwnPtrVector<RegisterWindow> m_register_windows;
Vector<bool> m_manually_entered_frames;
Vector<Variant<NonnullOwnPtr<RegisterWindow>, RegisterWindow*>> m_register_windows;
Optional<BasicBlock const*> m_pending_jump;
Value m_return_value;
Executable const* m_current_executable { nullptr };