[LLVMdev] Why "I = ++I" instead of "++I" in COFFDump.cpp ?

[Richard]

Oops, meant to send this to the mailing list instead of to Reid
privately. (Why cc the mailing list instead of just sending to the
mailing list?)

In article <CACs=tyJ6zaHeiS0eNhBkdcZE--JY4k7yH9_P1yFbGqod6uymMw at mail.gmail.com>,
    Reid Kleckner <rnk at google.com> writes:

> Looks like a bug.  This can probably be simplified with C++11.
> 
> On Fri, Apr 4, 2014 at 10:39 AM, Robison, Arch <arch.robison at intel.com>wrote:
> 
> >   for (; I != E; I = ++I) {
> >       ...
> >   }
> >
> > Is there a reason for writing "I = ++I" instead of "++I" ?

I don't see how it's a bug because functionality isn't impacted by
this.  It's simply a redundant assignment.

I also don't see what C++11 has to do with this.

    i = i;

has always been legal since the very first implementation of C and has
always been a pointless expression.

Had the code been:

    i = i++;

then we would have had a real problem since i++ returns the old value
of i before it was incremented and the loop would be infinite.
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