gcc/testsuite/gcc.dg/pr47028.c

   1 /* PR rtl-optimization/47028 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O -foptimize-sibling-calls -fno-forward-propagate -fno-tree-copy-prop -fno-tree-dominator-opts" } */
   4
   5 int
   6 fib (int n)
   7 {
   8   if (n <= 1)
   9     return 1;
  10   return fib (n - 2) + fib (n - 1);
  11 }
  12
  13 int
  14 main (void)
  15 {
  16   if (fib (5) != 8)
  17     __builtin_abort ();
  18   return 0;
  19 }