public void gen(int b, int a)
{
int label = newlabel();
expr.jumping(0, a);
emitlabel(label);
stmt.gen(label, a);
}
public void gen(int b, int a)
{
after = a;
int label = newlabel();
stmt.gen(b, label);
emitlabel(label);
expr.jumping(b, 0);
}
public void gen(int b, int a)
{
if (stmt1 == Stmt.Null)
{
stmt2.gen(b, a);
}
else if (stmt2 == Stmt.Null)
{
stmt1.gen(b, a);
}
else
{
int label = newlabel();
stmt1.gen(b, label);
emitlabel(label);
stmt2.gen(label, a);
}
}
public void gen(int b, int a)
{
after = a;
expr.jumping(0, a);
int label = newlabel();
emitlabel(label);
stmt.gen(label, b);
emit("goto L" + b);
}
public void program()
{
Stmt s = block();
int begin = s.newlabel();
int after = s.newlabel();
s.emitlabel(begin);
s.gen(begin, after);
s.emitlabel(after);
}
public void gen(int b, int a)
{
int label1 = newlabel();
int label2 = newlabel();
expr.jumping(0, label2);
emitlabel(label1);
stmt1.gen(label1, a);
emit("goto L" + a);
emitlabel(label2);
stmt2.gen(label2, a);
}
