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[3.2-BIB] make TREE_SYMBOL_REFERENCED return an rvalue

From: Matt Austern <austern at apple dot com>
To: gcc-patches at gcc dot gnu dot org
Date: Wed, 6 Nov 2002 08:57:49 -0800
Subject: [3.2-BIB] make TREE_SYMBOL_REFERENCED return an rvalue

As discussed: change TREE_SYMBOL_REFERENCED so it returns
an rvalue, introduce a new TREE_SET_SYMBOL_REFERENCED to
change the value of this flag, and change every place
where the old macro was used as an lvalue so it uses the
new macro instead.

I haven't added any langhooks.  I'm not 100% sure yet that
I need one, and I'd rather not waste the time and space on
something that might be unnecessary.  But this patch will
make it easy to add one in the future if we ever decide we
do need it.


			--Matt

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Follow-Ups:
- Re: [3.2-BIB] make TREE_SYMBOL_REFERENCED return an rvalue
  - From: Richard Henderson

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