1 /* Copyright (C) 2003, 2006  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 extern double cbrt(double);
15 
test(double x)16 void test(double x)
17 {
18   if (pow(x,-1.0) != 1.0/x)
19     abort ();
20 
21   if (pow(x,2.0) != x*x)
22     abort ();
23 
24   if (pow(x,-2.0) != 1.0/(x*x))
25     abort ();
26 
27   if (pow(x,0.5) != sqrt(x))
28     abort ();
29 
30 #ifdef HAVE_C99_RUNTIME
31   if (pow(x,1.0/3.0) != cbrt(x))
32     abort ();
33 #endif
34 }
35 
main()36 int main()
37 {
38   test (1.0);
39   test (2.0);
40   return 0;
41 }
42 
43