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
  13 void test(double x)
  14 {
  15   if (pow(x,-1.0) != 1.0/x)
  16     abort ();
  17
  18   if (pow(x,2.0) != x*x)
  19     abort ();
  20
  21   if (pow(x,-2.0) != 1.0/(x*x))
  22     abort ();
  23
  24   if (pow(x,0.5) != sqrt(x))
  25     abort ();
  26 }
  27
  28 int main()
  29 {
  30   test (1.0);
  31   test (2.0);
  32   return 0;
  33 }
  34