1  /* PR middle-end/100325 - missing warning with -O0 on sprintf overflow with
       2     pointer plus offset
       3     { dg-do compile }
       4     { dg-options "-O0 -Wall" } */
       5  
       6  #define S(n) (&"0123456789"[10 - n])
       7  
       8  extern int sprintf (char*, const char*, ...);
       9  
      10  char d[10];
      11  
      12  void nowarn_d10_s9 ()
      13  {
      14    sprintf (d, "%s", S (9));     // { dg-bogus "-Wformat-overflow" }
      15  }
      16  
      17  void warn_d10_s10 ()
      18  {
      19    sprintf (d, "%s", S (10));    // { dg-warning "-Wformat-overflow" }
      20  }