gcc/testsuite/gcc.dg/Wstringop-overflow-13.c

   1 /* PR middle-end/89957 - ICE calling strnlen with an int128_t bound
   2    in a known range
   3    PR middle-end/89911 - ICE on a call with no arguments to strnlen
   4    declared with no prototype
   5    { dg-do compile }
   6    { dg-options "-std=gnu17 -O2 -fpermissive -Wall" } */
   7
   8 typedef __SIZE_TYPE__ size_t;
   9
  10 extern size_t strnlen ();
  11
  12 size_t f0 (void)
  13 {
  14   return strnlen ();          /* { dg-warning "too few arguments to built-in function 'strnlen'" } */
  15 }
  16
  17 size_t f1 (const char *s)
  18 {
  19   return strnlen (s);         /* { dg-warning "too few arguments to built-in function 'strnlen'" } */
  20 }
  21
  22 size_t f2 (const char *s)
  23 {
  24   return strnlen (s, s);      /* { dg-warning "\\\[-Wint-conversion]" } */
  25 }
  26
  27 #if __SIZEOF_INT128__ == 16
  28
  29 size_t fi128 (const char *s, __int128_t n)
  30 {
  31  if (n < 0)
  32    n = 0;
  33
  34  /* PR middle-end/89957 */
  35  return strnlen (s, n);       /* { dg-warning "\\\[-Wbuiltin-declaration-mismatch]" "int128" { target int128 } } */
  36 }
  37
  38 #endif
  39
  40 /* { dg-prune-output "\\\[-Wint-conversion]" } */