gcc/testsuite/gcc.dg/tree-ssa/tailrecursion-3.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -foptimize-sibling-calls -fdump-tree-tailr-details" } */
   3 int
   4 t(int a)
   5 {
   6         int r;
   7         if (a)
   8                 r = t(a-1);
   9         else
  10                 return 0;
  11         if (r)
  12                 r=r;
  13         return r;
  14 }
  15 /* { dg-final { scan-tree-dump-times "Eliminated tail recursion" 1 "tailr1"} } */
  16 /* { dg-final { cleanup-tree-dump "tailr\[1-2\]" } } */