public override void Visit(AndExpressionNode node)
{
string BooleanExpressionLabel = BooleanExpressionLabelGenerator.GetNewLabel();
string BooleanExpressionIsFalseLabel = BooleanExpressionLabel + "IsFalse";
string BooleanExpressionStoreLabel = BooleanExpressionLabel + "Store";
node.expression1.Accept(this);
Gen("cmp", "eax", "0");
Gen("je", BooleanExpressionIsFalseLabel);
node.expression2.Accept(this);
Gen("cmp", "eax", "0");
Gen("je", BooleanExpressionIsFalseLabel);
Gen("mov", "eax", "1");
Gen("jmp", BooleanExpressionStoreLabel);
GenText(BooleanExpressionIsFalseLabel + ":");
Gen("mov", "eax", "0");
GenText(BooleanExpressionStoreLabel + ":");
}
public override void Visit(IfStatementNode node)
{
string ElseLabel = ElseLabelGenerator.GetNewLabel();
string ElseEndLabel = ElseLabel + "End";
node.expression.Accept(this);
Gen("cmp", "eax", "0");
Gen("je", ElseLabel);
node.thenStatement.Accept(this);
Gen("jmp", ElseEndLabel);
GenText(ElseLabel + ":");
node.elseStatement.Accept(this);
GenText(ElseEndLabel + ":");
}
public override void Visit(WhileStatementNode node)
{
string WhileLabel = WhileLabelGenerator.GetNewLabel();
string WhileLabelLoop = WhileLabel + "Loop";
string WhileLabelTest = WhileLabel + "Test";
Gen("jmp", WhileLabelTest);
GenText(WhileLabelLoop + ":");
node.statement.Accept(this);
GenText(WhileLabelTest + ":");
node.expression.Accept(this);
Gen("cmp", "eax", "0");
Gen("jg", WhileLabelLoop);
}