1  /* Copyright (C) 2003 Free Software Foundation.
       2  
       3     Check that constant folding of built-in math functions doesn't
       4     break anything and produces the expected results.
       5  
       6     Written by Roger Sayle, 29th July 2003.  */
       7  
       8  /* { dg-do link } */
       9  /* { dg-options "-O2 -ffast-math" } */
      10  
      11  extern void link_error(void);
      12  
      13  extern double pow(double,double);
      14  
      15  void test(double x)
      16  {
      17    if (pow(x,2.0) != x*x)
      18      link_error ();
      19  
      20    if (x*pow(x,2.0) != pow(x,3.0))
      21      link_error ();
      22  
      23    if (pow(x,2.0)*x != pow(x,3.0))
      24      link_error ();
      25  
      26    if (pow(x,3.0) != x*x*x)
      27      link_error ();
      28  
      29    if (pow(x,2.0)*x != x*x*x)
      30      link_error ();
      31  
      32    if (x*pow(x,2.0) != x*x*x)
      33      link_error ();
      34  
      35    if (pow(x,3.0)/x != pow(x,2.0))
      36      link_error ();
      37  
      38    if (pow(x,3.0)/x != x*x)
      39      link_error ();
      40  }
      41  
      42  int main()
      43  {
      44    test (2.0);
      45    return 0;
      46  }
      47