add test for n*n=2n bits multiplication

[libfirm] / ir / be / test / mul2n.c

/* should produce only ONE mul, no conv's */
#include <stdio.h>

int a = 0x80000000;

int main(void)
{
        long long x = (long long)a * a;
        printf("%lld\n", x);
        return 0;
}