[Bug middle-end/20794] [4.0/4.1 Regression] Miscompilation with __attribute ((aligned))

[joseph at codesourcery dot com]

------- Additional Comments From joseph at codesourcery dot com  2005-04-17 11:04 -------
Subject: Re:  [4.0/4.1 Regression] Miscompilation with
 __attribute ((aligned))

On Sun, 17 Apr 2005, mark at codesourcery dot com wrote:

> > The obvious options include:
> > 
> > * Make a new type of larger size to match the alignment whenever e.g. an
> > 8-byte-aligned-int is requested.  (Probably breaks too much.)
> > 
> > * Disallow arrays of extra-aligned types, and array references and pointer
> > arithmetic on such types; either with an error, or with a warning and removal of
> > the "aligned" attribute (in the case of arrays, attaching it to the array; in
> > the case of pointers, causing the results of the arithmetic to have the ordinary
> > type without alignment).
> 
> As a C front-end maintainer, which of these options do you prefer?  It 
> sounds like you, like me, favor the second option, but I'd like to be sure.

I'd prefer the second option.



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20794