gcc/testsuite/gcc.dg/builtins-17.c

   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, 25th May 2003.  */
   7
   8 /* { dg-do link } */
   9 /* { dg-options "-O2 -ffast-math" } */
  10
  11 extern void link_error(void);
  12
  13 extern double exp(double);
  14 extern double atan(double);
  15
  16 int main()
  17 {
  18   if (exp (1.0) < 2.71 || exp (1.0) > 2.72)
  19     link_error ();
  20   if (exp (2.0) < 7.38 || exp (2.0) > 7.39)
  21     link_error ();
  22   if (exp (-2.0) < 0.13 || exp (-2.0) > 0.14)
  23     link_error ();
  24   if (atan (1.0) < 0.78 || atan (1.0) > 0.79)
  25     link_error ();
  26
  27   return 0;
  28 }
  29