cokernel_hacker

  typedef int (*pfn)(void);
  int g(void);
  int h(void);

  pfn f(double x) {
    switch ((long long)x) {
    case 0:
      return g;
    case 17:
      return h;
    }
  }

  int f(int x) {
    switch (x) {
    case 0:
      return 31;
    case 1:
      return 28;
    case 2:
      return 30;
    }
  }

  int f(int x) {
    static int y[] = {42, 43};
    return y[x];
  }

  >>> [ord(x) ^ ord(y) for (x, y) in zip("windows", "sindogs")]
  [4, 0, 0, 0, 0, 16, 0]

  struct S { int large[100]; };

  int compliant(struct S a, const struct S *b);

  int escape(const void *x);

  int bad() {
    struct S s;
    escape(&s);
    return compliant(s, &s);
  }

  int compliant(struct S a, const struct S *b) {
    int r = &a != b;
    escape(&a);
    escape(b);
    return r;
  }