[objc-improvements-branch] FYI: Synced up with HEAD:2004-03-26T0130+0000

[Ziemowit Laski]

Also added mark_referenced() calls to some metadata so that ObjC still 
works at -O2 and above,
when the cgraph stuff kicks in (the objc/execute/ failures go away as a 
result, at least on Darwin):

   http://gcc.gnu.org/ml/gcc-cvs/2004-04/msg00141.html

Enjoy,

--Zem
--------------------------------------------------------------
Ziemowit Laski                 1 Infinite Loop, MS 301-2K
Mac OS X Compiler Group        Cupertino, CA USA  95014-2083
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