[Bug c/41793] [4.3/4.4/4.5 Regression] About Long long bit field

[shenrfen at gmail dot com]

------- Comment #7 from shenrfen at gmail dot com  2009-10-23 01:52 -------
What about the following case? There is not un-defined behavior.  
PS :Could you please tell me the full name of DR #120 documents.
Thanks again.

struct s
{
        unsigned long long a:2;
        unsigned long long b:40;
        unsigned long long c:22;
};

int main()
{
        struct s t = {1, 2, 3};
        unsigned long long a = t.a - 8;
        unsigned long long b = t.b - 8;
        unsigned long long c = t.c - 8;

        printf("0x%llx\n",a);
        printf("0x%llx\n",b);
        printf("0x%llx\n",c);
}

Tht output is :
0xfffffffffffffff9
0xfffffffffa
0xfffffffffffffffb


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41793