gcc/testsuite/gcc.dg/gnu23-tag-composite-4.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -std=gnu23" } */
   3
   4 // struct with variable size
   5
   6
   7
   8 int
   9 foo ()
  10 {
  11         int n = 10;
  12         struct s { char buf[n]; } s;
  13         {
  14                 int m = 10;
  15                 struct s { char buf[m]; } t;
  16                 typeof(*(1 ? &s : &t)) u;
  17                 return sizeof(u.buf);
  18         }
  19 }
  20
  21 int main()
  22 {
  23         if (10 != foo())
  24                 __builtin_abort();
  25
  26         return 0;
  27 }
  28