gcc/testsuite/gcc.dg/pr98721-1.c

   1 /* PR tree-optimization/98721 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2" } */
   4 /* { dg-require-effective-target alloca } */
   5
   6 int
   7 foo (int n)
   8 {
   9   if (n <= 0)
  10     {
  11       char vla[n];                      /* { dg-message "source object 'vla' of size 0" } */
  12       return __builtin_strlen (vla);    /* { dg-warning "'__builtin_strlen' reading 1 or more bytes from a region of size 0" } */
  13     }
  14   return -1;
  15 }