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LibJS: Move bytecode interpreter's inner loop to its own function

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This commit is contained in:
Andreas Kling 2023-09-26 16:41:42 +02:00
parent 951a85992b
commit 9fe38245b2
Notes: sideshowbarker 2024-07-17 00:57:24 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/9fe38245b2
Pull-request: https://github.com/SerenityOS/serenity/pull/21241
2 changed files with 23 additions and 15 deletions
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36
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
View file

@ -161,22 +161,8 @@ ThrowCompletionOr<Value> Interpreter::run(SourceTextModule& module)
return js_undefined();
}
Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable& executable, BasicBlock const* entry_point, CallFrame* in_frame)
void Interpreter::run_bytecode()
{
dbgln_if(JS_BYTECODE_DEBUG, "Bytecode::Interpreter will run unit {:p}", &executable);
TemporaryChange restore_executable { m_current_executable, &executable };
TemporaryChange restore_saved_jump { m_scheduled_jump, static_cast<BasicBlock const*>(nullptr) };
VERIFY(!vm().execution_context_stack().is_empty());
TemporaryChange restore_current_block { m_current_block, entry_point ?: executable.basic_blocks.first() };
if (in_frame)
push_call_frame(in_frame, executable.number_of_registers);
else
push_call_frame(make<CallFrame>(), executable.number_of_registers);
for (;;) {
auto pc = InstructionStreamIterator { m_current_block->instruction_stream(), m_current_executable };
TemporaryChange temp_change { m_pc, Optional<InstructionStreamIterator&>(pc) };
@ -185,6 +171,7 @@ Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable& executa
bool will_jump = false;
bool will_return = false;
bool will_yield = false;
while (!pc.at_end()) {
auto& instruction = *pc;
auto ran_or_error = instruction.execute(*this);
@ -260,6 +247,25 @@ Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable& executa
if (will_return)
break;
}
}
Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable& executable, BasicBlock const* entry_point, CallFrame* in_frame)
{
dbgln_if(JS_BYTECODE_DEBUG, "Bytecode::Interpreter will run unit {:p}", &executable);
TemporaryChange restore_executable { m_current_executable, &executable };
TemporaryChange restore_saved_jump { m_scheduled_jump, static_cast<BasicBlock const*>(nullptr) };
VERIFY(!vm().execution_context_stack().is_empty());
TemporaryChange restore_current_block { m_current_block, entry_point ?: executable.basic_blocks.first() };
if (in_frame)
push_call_frame(in_frame, executable.number_of_registers);
else
push_call_frame(make<CallFrame>(), executable.number_of_registers);
run_bytecode();
dbgln_if(JS_BYTECODE_DEBUG, "Bytecode::Interpreter did run unit {:p}", &executable);

2
Userland/Libraries/LibJS/Bytecode/Interpreter.h
View file

@ -92,6 +92,8 @@ public:
void visit_edges(Cell::Visitor&);
private:
void run_bytecode();
CallFrame& call_frame()
{
return m_call_frames.last().visit([](auto& x) -> CallFrame& { return *x; });