[patch, objc] fix PR43061

[Richard Guenther]

On Tue, Feb 16, 2010 at 1:36 AM, Mike Stump <mikestump@comcast.net> wrote:
> On Feb 15, 2010, at 4:05 PM, IainS wrote:
>>
>> proposed patch to fix this.
>> boostrapped/make check-objc  on i686-apple-darwin9
>> restores the objc test results to the same as 156187 (last local set I
>> have).
>>
>> cheers
>> Iain
>>
>> 2010-02-15  Iain Sandoe  <iain.sandoe@sandoe-acoustics.co.uk>
>>
>>        PR objc/43061
>>
>>        *gcc/objc/objc-act.c(finish_var_decl)   Add "used" attribute to
>>        vars in addition to the TREE_USED. This is needed by ipa*.c
>>        and cgraphunit.c.
>
> So, it would seem to me that slightly better than this would be to have
> those places test DECL_PRESERVED_P.

Indeed.

Richard.

>  If that fixes this, I think I like that
> version a bit better than this version.  I'm fine with this going in now, if
> you want, though, would be nice to remove it once the rest of the compiler
> can handle it.
>