------- Comment #2 from rguenther at suse dot de 2009-11-06 09:16 -------
Subject: Re: Incorrect "dereferencing type-punned pointer
will break strict-aliasing rules" warning
On Fri, 6 Nov 2009, pinskia at gcc dot gnu dot org wrote:
> ------- Comment #1 from pinskia at gcc dot gnu dot org 2009-11-06 09:09
> -------
> 4.5 also fails and I cannot figure why if I do:
"fails"?
> #include <new>
> struct APInt {
> int i;
> };
> int main() {
> APInt I;
> void *d;
> char Data[sizeof(APInt)];
> new((void*)Data)APInt();
> d = Data;
> *(APInt*)d = I;
> }
>
> GCC does not warn.
Of course not - the code is perfectly valid (apart from Data
not having suitable alignment for APInt, but that's unrelated
to aliasing issues).
Richard.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41874
