1 /* Copyright (C) 2003,2007 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, 5th April 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 sqrt(double);
15 extern double cbrt(double);
16 extern double pow(double,double);
17
test(double x,double y,double z)18 void test(double x, double y, double z)
19 {
20 if (sqrt(x)*sqrt(x) != x)
21 link_error ();
22
23 if (sqrt(x)*sqrt(y) != sqrt(x*y))
24 link_error ();
25
26 if (exp(x)*exp(y) != exp(x+y))
27 link_error ();
28
29 if (pow(x,y)*pow(z,y) != pow(z*x,y))
30 link_error ();
31
32 if (pow(x,y)*pow(x,z) != pow(x,y+z))
33 link_error ();
34
35 if (x/exp(y) != x*exp(-y))
36 link_error ();
37
38 if (x/pow(y,z) != x*pow(y,-z))
39 link_error ();
40
41 if (x/sqrt(y/z) != x*sqrt(z/y))
42 link_error ();
43
44 if (x/cbrt(y/z) != x*cbrt(z/y))
45 link_error ();
46 }
47
main()48 int main()
49 {
50 test (2.0, 3.0, 4.0);
51 return 0;
52 }
53
54