gcc/testsuite/gcc.dg/builtins-31.c

   1 /* Copyright (C) 2004 Free Software Foundation.
   2
   3    Check that constant folding of signbit, signbitf and signbitl math
   4    functions doesn't break anything and produces the expected results.
   5
   6    Written by Roger Sayle, 28th January 2004.  */
   7
   8 /* { dg-do link } */
   9 /* { dg-options "-O2" } */
  10
  11 extern void link_error(void);
  12
  13 extern int signbit(double);
  14 extern int signbitf(float);
  15 extern int signbitl(long double);
  16
  17 int main()
  18 {
  19   if (signbit (1.0) != 0)
  20     link_error ();
  21   if (signbit (-2.0) == 0)
  22     link_error ();
  23
  24   if (signbitf (1.0f) != 0)
  25     link_error ();
  26   if (signbitf (-2.0f) == 0)
  27     link_error ();
  28
  29   if (signbitl (1.0l) != 0)
  30     link_error ();
  31   if (signbitl (-2.0f) == 0)
  32     link_error ();
  33
  34   return 0;
  35 }
  36