gcc/testsuite/gcc.dg/builtins-7.c

   1 /* Copyright (C) 2003  Free Software Foundation.
   2
   3    Verify that built-in math function constant folding of constant
   4    arguments is correctly performed by the by the compiler.
   5
   6    Written by Roger Sayle, 30th March 2003.  */
   7
   8 /* { dg-do link } */
   9 /* { dg-options "-O2 -ffast-math" } */
  10
  11 extern double pow (double, double);
  12 extern float powf (float, float);
  13 extern long double powl (long double, long double);
  14 extern double tan (double);
  15 extern float tanf (float);
  16 extern long double tanl (long double);
  17 extern double atan (double);
  18 extern float atanf (float);
  19 extern long double atanl (long double);
  20
  21 extern void link_error(void);
  22
  23 void test(double x)
  24 {
  25   if (pow (x, 1.0) != x)
  26     link_error ();
  27   if (tan (atan (x)) != x)
  28     link_error ();
  29 }
  30
  31 void testf(float x)
  32 {
  33   if (powf (x, 1.0f) != x)
  34     link_error ();
  35   if (tanf (atanf (x)) != x)
  36     link_error ();
  37 }
  38
  39 void testl(long double x)
  40 {
  41   if (powl (x, 1.0l) != x)
  42     link_error ();
  43   if (tanl (atanl (x)) != x)
  44     link_error ();
  45 }
  46
  47 int main()
  48 {
  49   test (2.0);
  50   testf (2.0f);
  51   testl (2.0l);
  52
  53   return 0;
  54 }
  55