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LibJS: Generate bytecode for template literals

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Gunnar Beutner 2021-06-08 19:14:01 +02:00 • committed by Andreas Kling
parent 0b2bf3d73a
commit 75a12bc2b7
2 changed files with 21 additions and 0 deletions
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1
Userland/Libraries/LibJS/AST.h
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@ -1092,6 +1092,7 @@ public:
virtual Value execute(Interpreter&, GlobalObject&) const override; virtual Value execute(Interpreter&, GlobalObject&) const override;
virtual void dump(int indent) const override; virtual void dump(int indent) const override;
virtual Optional<Bytecode::Register> generate_bytecode(Bytecode::Generator&) const override;
const NonnullRefPtrVector<Expression>& expressions() const { return m_expressions; } const NonnullRefPtrVector<Expression>& expressions() const { return m_expressions; }
const NonnullRefPtrVector<Expression>& raw_strings() const { return m_raw_strings; } const NonnullRefPtrVector<Expression>& raw_strings() const { return m_raw_strings; }

20
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
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@ -478,4 +478,24 @@ Optional<Bytecode::Register> SequenceExpression::generate_bytecode(Bytecode::Gen
return last_reg; return last_reg;
} }
Optional<Bytecode::Register> TemplateLiteral::generate_bytecode(Bytecode::Generator& generator) const
{
Optional<Bytecode::Register> result_reg;
for (auto& expression : m_expressions) {
auto expr_reg = expression.generate_bytecode(generator);
if (!result_reg.has_value())
result_reg = expr_reg;
else
generator.emit<Bytecode::Op::Add>(*result_reg, *result_reg, *expr_reg);
}
if (!result_reg.has_value()) {
result_reg = generator.allocate_register();
generator.emit<Bytecode::Op::NewString>(*result_reg, "");
}
return result_reg;
}
} }