gcc-4.9/gcc/testsuite/gcc.c-torture/compile/acc1.c


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/* { dg-options "-ffast-math" } */

/* Fast maths allows tail recursion to be turned into iteration.  */

double
foo (int n, double f)
{
  if (n == 0)
    return f;
  else
    return f + foo (n - 1, f);
}

double
bar (int n, double f)
{
  if (n == 0)
    return f;
  else
    return f * bar (n - 1, f);
}