gcc/testsuite/gcc.dg/nested-func-12.c

   1 /* PR target/88620 */
   2 /* { dg-do run } */
   3 /* { dg-options "-Ofast --param ipa-cp-eval-threshold=0 -fno-guess-branch-probability -fno-inline-small-functions" } */
   4 /* { dg-require-effective-target alloca } */
   5
   6 void
   7 foo (int n)
   8 {
   9   struct S { int a[n]; };
  10
  11   struct S
  12   fn (void)
  13   {
  14     struct S s;
  15     s.a[0] = 42;
  16     return s;
  17   }
  18
  19   auto struct S
  20   fn2 (void)
  21   {
  22     return fn ();
  23   }
  24
  25   struct S x;
  26   fn ();
  27   fn2 ();
  28   x = fn ();
  29
  30   if (x.a[0] != 42)
  31     __builtin_abort ();
  32
  33   if (fn ().a[0] != 42)
  34     __builtin_abort ();
  35
  36   __typeof__ (fn ()) *p = &x;
  37   if (p->a[0] != 42)
  38     __builtin_abort ();
  39
  40   if (fn2 ().a[0] != 42)
  41     __builtin_abort ();
  42 }
  43
  44 int
  45 main (void)
  46 {
  47   foo (1);
  48 }