gcc/testsuite/gcc.dg/pr80776-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -Wformat-overflow" } */
   3
   4 extern __inline __attribute__ ((__always_inline__)) __attribute__ ((__gnu_inline__)) __attribute__ ((__artificial__)) int
   5 __attribute__ ((__nothrow__ , __leaf__)) sprintf (char *__restrict __s, const char *__restrict __fmt, ...)
   6 {
   7   return __builtin___sprintf_chk (__s, 2 - 1,
   8                                   __builtin_object_size (__s, 2 > 1), __fmt, __builtin_va_arg_pack ());
   9 }
  10 char number[sizeof "999999"];
  11 int somerandom (void);
  12 void
  13 Foo (void)
  14 {
  15   int i = somerandom ();
  16   if (! (0 <= i))
  17     __builtin_unreachable ();
  18   if (! (0 <= i && i <= 999999))
  19     __builtin_unreachable ();
  20   /* The correctness bits for [E]VRP cannot handle chained conditionals
  21      when deciding to ignore a unreachable branch for setting SSA range info. */
  22   sprintf (number, "%d", i); /* { dg-bogus "writing" "" { xfail *-*-* } } */
  23 }