edge case for 64bit add where add with flag output is CSEd

[libfirm] / ir / be / test / add64.c

long long f(long long a, long long b)
{
        long long c = (a & 0xffffffff) | 0x100000000;
        return a + b + c;
}

int main(int argc, char **argv) {
        printf("Res: %llx\n", f(0x100000000, 0x100000000));
}