gcc/testsuite/gcc.dg/nested-func-8.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O -fno-inline" } */
   3
   4 extern void abort (void);
   5
   6 /* Return 0 and clobber the static chain.  */
   7
   8 int
   9 zero (int n)
  10 {
  11   int
  12   nested (int m)
  13   {
  14     return m - n;
  15   }
  16
  17   return nested (n);
  18 }
  19
  20 /* Return the triple of ARG in a convoluted manner.  */
  21
  22 int
  23 triple (int arg)
  24 {
  25   int
  26   read_arg (void)
  27   {
  28     return arg;
  29   }
  30
  31   int
  32   parent (int nested_arg)
  33   {
  34     int
  35     child1 (void)
  36     {
  37       return parent (zero (5));
  38     }
  39
  40     int
  41     child2 (void)
  42     {
  43       return nested_arg + read_arg ();
  44     }
  45
  46     return (nested_arg == 0 ? 0 : child1 ()) + child2 ();
  47   }
  48
  49   return parent (arg);
  50 }
  51
  52 int main(void)
  53 {
  54   if (triple (13) != 3 * 13)
  55     abort ();
  56   return 0;
  57 }