gcc/testsuite/gcc.dg/builtins-85.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3
   4 typedef __SIZE_TYPE__ size_t;
   5 extern void __chk_fail (void);
   6 extern int snprintf (char *, size_t, const char *, ...);
   7 extern inline __attribute__((gnu_inline, always_inline)) int snprintf (char *a, size_t b, const char *fmt, ...)
   8 {
   9   if (__builtin_object_size (a, 0) != -1UL && __builtin_object_size (a, 0) < b)
  10     __chk_fail ();
  11   return __builtin_snprintf (a, b, fmt, __builtin_va_arg_pack ());
  12 }
  13 extern int snprintf (char *, size_t, const char *, ...) __asm ("mysnprintf");
  14
  15 char buf[10];
  16
  17 int
  18 main (void)
  19 {
  20   snprintf (buf, 10, "%d%d\n", 10, 10);
  21   return 0;
  22 }
  23
  24 /* { dg-final { scan-assembler "mysnprintf" } } */
  25 /* { dg-final { scan-assembler-not "__chk_fail" } } */