Re: Huge Increase in Unstripped Executable Size G++ 2.95 to 3.2

[Mark Mitchell <mark at codesourcery dot com>]

--On Friday, February 28, 2003 08:35:52 PM -0800 Devang Patel 
<dpatel at apple dot com> wrote:

> On Friday, February 28, 2003, at 06:05 PM, Richard Henderson wrote:
>
> > On Fri, Feb 28, 2003 at 05:41:24PM -0800, Mark Mitchell wrote:
> > > Instead, why not apply the same logic to the TYPE nodes themselves,
> > > and
> > > set DECL_IGNORED?
> >
> > Do we even have this information available?  I don't think
> > we do.  The VAR_DECL nodes from automatic variables should
> > be gone by this time.
> >
> > We could perhaps have started out with some sort of mark
> > on TYPE nodes, which starts unset, and is set only when
> > some DECL that makes it to debug info makes use of it.
> > This, however, would be a rather large change, I think.

Yes, but this is the right thing to do.  In fact, what we should do is, at 
the end of the translation unit, go through and discard all trees that we 
won't need, and show the back end only those trees that are needed.

Until that point, absolutely no RTL should be generated, and nothing should 
be written to the assembly file.

If you ask me, of course. :-)

I'm OK with the patch because it's very expedient: it's a win, and it's 
pretty self-contained, and the other solution is definitely more work.

--
Mark Mitchell                mark at codesourcery dot com
CodeSourcery, LLC            http://www.codesourcery.com