gcc/testsuite/gcc.dg/builtins-8.c

   1 /* Copyright (C) 2003  Free Software Foundation.
   2
   3    Verify that built-in math function constant folding of functions
   4    with one constant argument is correctly performed by the compiler.
   5
   6    Written by Roger Sayle, 30th March 2003.  */
   7
   8 /* { dg-do run } */
   9 /* { dg-options "-O2 -ffast-math" } */
  10
  11 extern void abort(void);
  12 extern double pow(double, double);
  13 extern double sqrt(double);
  14
  15 void test(double x)
  16 {
  17   if (pow(x,-1.0) != 1.0/x)
  18     abort ();
  19
  20   if (pow(x,2.0) != x*x)
  21     abort ();
  22
  23   if (pow(x,-2.0) != 1.0/(x*x))
  24     abort ();
  25
  26   if (pow(x,0.5) != sqrt(x))
  27     abort ();
  28 }
  29
  30 int main()
  31 {
  32   test (1.0);
  33   test (2.0);
  34   return 0;
  35 }
  36