------- Comment #4 from rguenth at gcc dot gnu dot org 2010-02-16 13:17 -------
#define FOO ((long)i * (long)i)
#define FOO2 (FOO * FOO)
#define FOO3 (FOO2 * FOO2)
#define FOO4 (FOO3 * FOO3)
#define FOO5 (FOO4 * FOO4)
#define FOO6 (FOO5 * FOO5)
#define FOO7 (FOO6 * FOO6)
#define FOO8 (FOO7 * FOO7)
#define FOO9 (FOO8 * FOO8)
#define FOO10 (FOO9 * FOO9)
#define FOO11 (FOO10 * FOO10)
#define FOO12 (FOO11 * FOO11)
#define FOO13 (FOO12 * FOO12)
#define FOO14 (FOO13 * FOO13)
#define FOO15 (FOO14 * FOO14)
#define FOO16 (FOO15 * FOO15)
int foo (int i)
{
return (int)(FOO14);
}
At -O0:
FOO12: 1.6s
FOO13: 3.2s
FOO14: 6.7s
FOO15: 13s
we just take endless time with the above, memory usage isn't as bad as
with VRP.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41043
