1  /* Copyright (C) 2004 Free Software Foundation.
       2  
       3     Check that constant folding of copysign, copysignf and copysignl math
       4     functions doesn't break anything and produces the expected results.
       5  
       6     Written by Roger Sayle, 6th June 2004.  */
       7  
       8  /* { dg-do link } */
       9  /* { dg-options "-O2" } */
      10  
      11  extern void link_error(void);
      12  
      13  extern double copysign(double, double);
      14  extern float copysignf(float, float);
      15  extern long double copysignl(long double, long double);
      16  
      17  int main()
      18  {
      19    if (copysign (2.0, 1.0) != 2.0)
      20      link_error ();
      21    if (copysign (2.0, -1.0) != -2.0)
      22      link_error ();
      23    if (copysign (-2.0, 1.0) != 2.0)
      24      link_error ();
      25    if (copysign (-2.0, -1.0) != -2.0)
      26      link_error ();
      27  
      28    if (copysign (2.0, 1.0) != 2.0)
      29      link_error ();
      30    if (copysign (2.0, -1.0) != -2.0)
      31      link_error ();
      32    if (copysign (-2.0, 1.0) != 2.0)
      33      link_error ();
      34    if (copysign (-2.0, -1.0) != -2.0)
      35      link_error ();
      36  
      37    if (copysignf (2.0f, 1.0f) != 2.0f)
      38      link_error ();
      39    if (copysignf (2.0f, -1.0f) != -2.0f)
      40      link_error ();
      41    if (copysignf (-2.0f, 1.0f) != 2.0f)
      42      link_error ();
      43    if (copysignf (-2.0f, -1.0f) != -2.0f)
      44      link_error ();
      45  
      46    if (copysignl (2.0l, 1.0l) != 2.0l)
      47      link_error ();
      48    if (copysignl (2.0l, -1.0l) != -2.0l)
      49      link_error ();
      50    if (copysignl (-2.0l, 1.0l) != 2.0l)
      51      link_error ();
      52    if (copysignl (-2.0l, -1.0l) != -2.0l)
      53      link_error ();
      54  
      55    return 0;
      56  }
      57