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LibJS: Add support for various assignment operators

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This commit is contained in:
Ryan Chandler 2021-06-07 20:12:38 +01:00 • committed by Andreas Kling
parent 18ac7fde12
commit 6681415f58
1 changed files with 44 additions and 2 deletions
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46
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
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@ -177,8 +177,50 @@ Optional<Bytecode::Register> AssignmentExpression::generate_bytecode(Bytecode::G
auto& identifier = static_cast<Identifier const&>(*m_lhs);
auto rhs_reg = m_rhs->generate_bytecode(generator);
VERIFY(rhs_reg.has_value());
generator.emit<Bytecode::Op::SetVariable>(identifier.string(), *rhs_reg);
return rhs_reg;
if (m_op == AssignmentOp::Assignment) {
generator.emit<Bytecode::Op::SetVariable>(identifier.string(), *rhs_reg);
return rhs_reg;
}
auto lhs_reg = m_lhs->generate_bytecode(generator);
auto dst_reg = generator.allocate_register();
switch (m_op) {
case AssignmentOp::AdditionAssignment:
generator.emit<Bytecode::Op::Add>(dst_reg, *lhs_reg, *rhs_reg);
break;
case AssignmentOp::SubtractionAssignment:
generator.emit<Bytecode::Op::Sub>(dst_reg, *lhs_reg, *rhs_reg);
break;
case AssignmentOp::MultiplicationAssignment:
generator.emit<Bytecode::Op::Mul>(dst_reg, *lhs_reg, *rhs_reg);
break;
case AssignmentOp::DivisionAssignment:
generator.emit<Bytecode::Op::Div>(dst_reg, *lhs_reg, *rhs_reg);
break;
case AssignmentOp::ModuloAssignment:
generator.emit<Bytecode::Op::Mod>(dst_reg, *lhs_reg, *rhs_reg);
break;
case AssignmentOp::ExponentiationAssignment:
generator.emit<Bytecode::Op::Exp>(dst_reg, *lhs_reg, *rhs_reg);
break;
case AssignmentOp::BitwiseAndAssignment:
generator.emit<Bytecode::Op::BitwiseAnd>(dst_reg, *lhs_reg, *rhs_reg);
break;
case AssignmentOp::BitwiseOrAssignment:
generator.emit<Bytecode::Op::BitwiseOr>(dst_reg, *lhs_reg, *rhs_reg);
break;
case AssignmentOp::BitwiseXorAssignment:
generator.emit<Bytecode::Op::BitwiseXor>(dst_reg, *lhs_reg, *rhs_reg);
break;
default:
TODO();
}
generator.emit<Bytecode::Op::SetVariable>(identifier.string(), dst_reg);
return dst_reg;
}
if (is<MemberExpression>(*m_lhs)) {