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LibJS/Bytecode: Simplify creating/leaving lexical environment

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Since we no longer need to create or leave var environments directly
in bytecode, we can streamline the two instructions by making them
always operate on the lexical environment.
This commit is contained in:
Andreas Kling
2023-06-16 16:43:24 +02:00
parent 12ce0789da
commit dbfe1311ef
6 changed files with 25 additions and 45 deletions
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28
Userland/Libraries/LibJS/Bytecode/Op.cpp
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@@ -411,17 +411,14 @@ ThrowCompletionOr<void> DeleteVariable::execute_impl(Bytecode::Interpreter& inte
return {};
}
ThrowCompletionOr<void> CreateEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
ThrowCompletionOr<void> CreateLexicalEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto make_and_swap_envs = [&](auto& old_environment) {
GCPtr<Environment> environment = new_declarative_environment(*old_environment).ptr();
swap(old_environment, environment);
return environment;
};
if (m_mode == EnvironmentMode::Lexical)
interpreter.saved_lexical_environment_stack().append(make_and_swap_envs(interpreter.vm().running_execution_context().lexical_environment));
else if (m_mode == EnvironmentMode::Var)
interpreter.saved_variable_environment_stack().append(make_and_swap_envs(interpreter.vm().running_execution_context().variable_environment));
interpreter.saved_lexical_environment_stack().append(make_and_swap_envs(interpreter.vm().running_execution_context().lexical_environment));
return {};
}
@@ -831,12 +828,9 @@ ThrowCompletionOr<void> ScheduleJump::execute_impl(Bytecode::Interpreter& interp
return {};
}
ThrowCompletionOr<void> LeaveEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
ThrowCompletionOr<void> LeaveLexicalEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
{
if (m_mode == EnvironmentMode::Lexical)
interpreter.vm().running_execution_context().lexical_environment = interpreter.saved_lexical_environment_stack().take_last();
if (m_mode == EnvironmentMode::Var)
interpreter.vm().running_execution_context().variable_environment = interpreter.saved_variable_environment_stack().take_last();
interpreter.vm().running_execution_context().lexical_environment = interpreter.saved_lexical_environment_stack().take_last();
return {};
}
@@ -1191,12 +1185,9 @@ DeprecatedString DeleteVariable::to_deprecated_string_impl(Bytecode::Executable
return DeprecatedString::formatted("DeleteVariable {} ({})", m_identifier, executable.identifier_table->get(m_identifier));
}
DeprecatedString CreateEnvironment::to_deprecated_string_impl(Bytecode::Executable const&) const
DeprecatedString CreateLexicalEnvironment::to_deprecated_string_impl(Bytecode::Executable const&) const
{
auto mode_string = m_mode == EnvironmentMode::Lexical
? "Lexical"
: "Variable";
return DeprecatedString::formatted("CreateEnvironment mode:{}", mode_string);
return "CreateLexicalEnvironment"sv;
}
DeprecatedString CreateVariable::to_deprecated_string_impl(Bytecode::Executable const& executable) const
@@ -1344,12 +1335,9 @@ DeprecatedString ScheduleJump::to_deprecated_string_impl(Bytecode::Executable co
return DeprecatedString::formatted("ScheduleJump {}", m_target);
}
DeprecatedString LeaveEnvironment::to_deprecated_string_impl(Bytecode::Executable const&) const
DeprecatedString LeaveLexicalEnvironment::to_deprecated_string_impl(Bytecode::Executable const&) const
{
auto mode_string = m_mode == EnvironmentMode::Lexical
? "Lexical"
: "Variable";
return DeprecatedString::formatted("LeaveEnvironment env:{}", mode_string);
return "LeaveLexicalEnvironment"sv;
}
DeprecatedString LeaveUnwindContext::to_deprecated_string_impl(Bytecode::Executable const&) const