badopt1.c

来自「linux下编程用 编译软件」· C语言 代码 · 共 17 行

// { dg-do run  }
// { dg-options "-O2" }
// Based on a testcase by Bryan Weston <[e-mail]>
// egcs 1.1 fails to increment count


struct Base { Base() {} }; // removing the constructor fixes the problem
struct Derived : Base {}; // so does removing the base class

int main() {
  int count = 0;
  Derived* array[1]; // making this Base*[1] does not fix the problem
  array[count++] = new Derived (); // but then new Base() does
  if (count!=1)
    return 1;
}