gcc/testsuite/gcc.dg/pr78768.c

   1 /* PR c/78768 - -Walloca-larger-than and -Wformat-overflow warnings disabled
   2    by -flto
   3   { dg-do link }
   4   { dg-require-effective-target lto }
   5   { dg-options "-O2 -Walloca-larger-than=10 -Wformat -Wformat-overflow -flto" } */
   6
   7 int main (void)
   8 {
   9   char *d = (char *)__builtin_alloca (12);  /* { dg-warning "argument to .alloca. is too large" } */
  10
  11   __builtin_sprintf (d, "%32s", "x");   /* { dg-warning "directive writing 32 bytes into a region of size 12" "-Wformat-overflow" { xfail *-*-* } } */
  12
  13   return 0;
  14 }