List Archive: gentoo-amd64
Note: Due to technical difficulties, the Archives are currently not up to date.
provides an alternative service for most mailing lists.c.f. bug 424647
On Fri, 01 Jul 2011 02:44:36 +0300
Nikos Chantziaras <realnc@...> wrote:
> > Your code is buggy, because you're breaking C's aliasing rules. You are
> > not allowed to use a different pointer type to dereference a variable of
> > a different type. Doing so results in undefined behavior.
Well, the error occurs only within the loop structure. If
I manually "unroll" the loop using the same pointers there
is no error when compiled with "O2."
IOW, the problem is how the loop is optimized under -O2.