gcc/testsuite/c-c++-common/pr56607.c

   1 /* PR c++/56607 */
   2 /* { dg-do compile { target { { lp64 || ilp32 } || llp64 } } } */
   3 /* { dg-options "-O2 -Wdiv-by-zero" } */
   4
   5 int
   6 f1 (void)
   7 {
   8   return 1 / (sizeof (char) - 1);       /* { dg-warning "division by zero" } */
   9 }
  10
  11 int
  12 f2 (void)
  13 {
  14   const int x = sizeof (char) - 1;
  15   return 1 / x;                         /* { dg-warning "division by zero" } */
  16 }
  17
  18 int
  19 f3 (void)
  20 {
  21   return 1 / (sizeof (int) / 3 - 1);    /* { dg-warning "division by zero" } */
  22 }
  23
  24 int
  25 f4 (void)
  26 {
  27   const int x = sizeof (int) / 3 - 1;
  28   return 1 / x;                         /* { dg-warning "division by zero" } */
  29 }