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LibJS: Implement 'this' in the bytecode VM

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ThisExpression now emits a "ResolveThisBinding" bytecode op, which
simply loads the VM's current 'this' binding into the accumulator.
This commit is contained in:
Andreas Kling 2021-10-24 14:43:00 +02:00
parent 7c7bc4f44a
commit 3117182c2e
5 changed files with 29 additions and 0 deletions
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10
Userland/Libraries/LibJS/Bytecode/Op.cpp
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@ -282,6 +282,11 @@ void Jump::execute_impl(Bytecode::Interpreter& interpreter) const
interpreter.jump(*m_true_target);
}
void ResolveThisBinding::execute_impl(Bytecode::Interpreter& interpreter) const
{
interpreter.accumulator() = interpreter.vm().resolve_this_binding(interpreter.global_object());
}
void Jump::replace_references_impl(BasicBlock const& from, BasicBlock const& to)
{
if (m_true_target.has_value() && &m_true_target->block() == &from)
@ -785,4 +790,9 @@ String IteratorResultValue::to_string_impl(Executable const&) const
return "IteratorResultValue";
}
String ResolveThisBinding::to_string_impl(Bytecode::Executable const&) const
{
return "ResolveThisBinding"sv;
}
}