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LibJS: Generate bytecode for do...while statements :^)

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This was quite straightforward using the same label/jump machinery that
we added for while statements.

The main addition here is a new JumpIfTrue bytecode instruction.
This commit is contained in:
Andreas Kling 2021-06-04 12:20:44 +02:00
parent bd1a5e282a
commit f2863b5a89
4 changed files with 45 additions and 0 deletions
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10
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
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@ -105,4 +105,14 @@ Optional<Bytecode::Register> WhileStatement::generate_bytecode(Bytecode::Generat
return body_result_reg;
}
Optional<Bytecode::Register> DoWhileStatement::generate_bytecode(Bytecode::Generator& generator) const
{
auto head_label = generator.make_label();
auto body_result_reg = m_body->generate_bytecode(generator);
auto test_result_reg = m_test->generate_bytecode(generator);
VERIFY(test_result_reg.has_value());
generator.emit<Bytecode::Op::JumpIfTrue>(*test_result_reg, head_label);
return body_result_reg;
}
}