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LibJS: Very basic support for "new" construction in bytecode VM

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This patch adds a CallType to the Bytecode::Op::Call instruction,
which can be either Call or Construct. We then generate Construct
calls for the NewExpression AST node.

When executed, these get fed into VM::construct().
This commit is contained in:
Andreas Kling 2021-06-10 23:01:49 +02:00
parent c3c68399b5
commit f5feb1d2cd
3 changed files with 23 additions and 5 deletions
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7
Userland/Libraries/LibJS/Bytecode/Op.cpp
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@ -199,14 +199,17 @@ void Call::execute(Bytecode::Interpreter& interpreter) const
Value return_value;
if (m_argument_count == 0) {
if (m_argument_count == 0 && m_type == CallType::Call) {
return_value = interpreter.vm().call(function, this_value);
} else {
MarkedValueList argument_values { interpreter.vm().heap() };
for (size_t i = 0; i < m_argument_count; ++i) {
argument_values.append(interpreter.reg(m_arguments[i]));
}
return_value = interpreter.vm().call(function, this_value, move(argument_values));
if (m_type == CallType::Call)
return_value = interpreter.vm().call(function, this_value, move(argument_values));
else
return_value = interpreter.vm().construct(function, function, move(argument_values), interpreter.global_object());
}
interpreter.accumulator() = return_value;