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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/94527] RFE: Add an __attribute__ that marks a
 function as freeing an object
Date: Wed, 08 Apr 2020 06:45:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94527

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|tree-optimization           |middle-end

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Agreed that having an attribute to annotate free-like functions similar to =
how
we have one for malloc-like funtions would be nice.

How are semantics in the case such a function throws?  Or shall 'free' imply
nothrow and that it doesn't return abnormally (it doesn't call longjmp),
'leaf' would be a bit too strong but possibly easiest to require?

We could also simply say that the pointed to object is released (it's conte=
nts
become undefined) upon exiting the function by any means (normal return, EH
or abnormal).=