Re: [PATCH]: Fix PR tree-optimization/21407

[Dale Johannesen <dalej at apple dot com>]

On May 10, 2005, at 10:32 AM, Kenneth Zadeck wrote:
> Dale Johannesen wrote:
> > On May 10, 2005, at 9:46 AM, Daniel Berlin wrote:
> > > On Tue, 2005-05-10 at 09:30 -0700, Mark Mitchell wrote:
> > > > Daniel Berlin wrote:
> > > > but if there's
> > > > no exemption for character pointers in that case, there should be, 
> > > > at
> > > > least in GNU C, where we assume unsegmented memory.
> > >
> > > If i give you a pointer to a field, that would mean you could add or
> > > subtract bytes and legally get at any other member of the structure,
> > > containing structure, etc.
> > > I was told by Geoff Keating, and others, that this is not legal in C.
> > > Have I been misinformed?  That would be quite sad.
> >
> > There was quite a bit of discussion of this internal to Apple, and no
> > agreement was reached.  Geoff strongly takes the position you say;
> > Mike and I disagree.  The standard seems unclear.
> I had this discussion at Apple with Geoff Keating and Mike Stump.  
> When I left,
> they were on board with this.  I would not have taken the time to do 
> this if I
> thought I was bending the language.  A never talked to Matt about this.

It is possible that Mike changed his mind, but that was not his opinion 
when
I talked to him.  I'm sure he'll clarify when he gets in.