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LibJS: Add LoadArgument bytecode instruction for fast argument access

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This is generated for Identifier nodes that represent a function
argument variable. It loads a given argument index from the current
call frame into the accumulator.
This commit is contained in:
Andreas Kling 2021-06-14 09:37:35 +02:00
parent 848944113c
commit 91fbeeab72
4 changed files with 31 additions and 1 deletions
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10
Userland/Libraries/LibJS/Bytecode/Op.cpp
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@ -311,6 +311,11 @@ void PutByValue::execute(Bytecode::Interpreter& interpreter) const
}
}
void LoadArgument::execute(Bytecode::Interpreter& interpreter) const
{
interpreter.accumulator() = interpreter.vm().argument(m_index);
}
String Load::to_string(Bytecode::Executable const&) const
{
return String::formatted("Load {}", m_src);
@ -493,4 +498,9 @@ String PutByValue::to_string(const Bytecode::Executable&) const
return String::formatted("PutByValue base:{}, property:{}", m_base, m_property);
}
String LoadArgument::to_string(const Bytecode::Executable&) const
{
return String::formatted("LoadArgument {}", m_index);
}
}