gcc/testsuite/gcc.dg/nested-func-10.c

   1 /* PR c/70093 */
   2 /* { dg-do compile } */
   3 /* { dg-options "" } */
   4 /* { dg-require-effective-target alloca } */
   5
   6 void __attribute__((noinline, noclone))
   7 foo (int n)
   8 {
   9   struct S { int a[n]; };
  10
  11   struct S __attribute__((noreturn))
  12   fn (void)
  13   {
  14     __builtin_abort ();
  15   }
  16
  17   auto struct S __attribute__((noreturn))
  18   fn2 (void)
  19   {
  20     __builtin_abort ();
  21   }
  22
  23   struct S x;
  24   __typeof__ (fn ()) *p = &x;
  25   switch (n)
  26     {
  27     case 1:
  28       fn ();
  29       break;
  30     case 2:
  31       fn2 ();
  32       break;
  33     case 3:
  34       x = fn ();
  35       if (x.a[0] != 42)
  36         __builtin_abort ();
  37       break;
  38     case 4:
  39       if (fn ().a[0] != 42)
  40         __builtin_abort ();
  41       break;
  42     case 5:
  43       if (p->a[0] != 42)
  44         __builtin_abort ();
  45       break;
  46     case 6:
  47       if (fn2 ().a[0] != 42)
  48         __builtin_abort ();
  49       break;
  50     }
  51 }
  52
  53 int
  54 main (void)
  55 {
  56   foo (1);
  57 }