cpf.dcf

用Java实现的编译器。把源代码编译成SPARC汇编程序

class Program {
  
  void main() {
    int a, b, c, d, e;
	
    a = 3;
    callout("writestring","B?");
    b = callout("readint");
    
    c = a + 2; // constant prop & fold
    c = c + b; // constant prop

    if (b < 4) {
      a = b;
    }

    a = a + a; // Nothing should happen here
    d = 64;
    
    callout("printf", "a: %d\n", a);
    callout("printf", "b: %d\n", b);
    callout("printf", "c: %d\n", c);
    callout("printf", "d: %d\n", d);

  }
}