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[Bug c/22278] gcc -O2 discards cast to volatile
- From: "gdr at integrable-solutions dot net" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 3 Jul 2005 02:54:55 -0000
- Subject: [Bug c/22278] gcc -O2 discards cast to volatile
- References: <20050702164323.22278.olivier.baudron@m4x.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From gdr at integrable-solutions dot net 2005-07-03 02:54 -------
Subject: Re: gcc -O2 discards cast to volatile
"gcc2eran at tromer dot org" <gcc-bugzilla@gcc.gnu.org> writes:
| > [#5] If an attempt is made to modify an object defined with
| > a const-qualified type through use of an lvalue with non-
| > const-qualified type, the behavior is undefined. If an
| > attempt is made to refer to an object defined with a
| > volatile-qualified type through use of an lvalue with non-
| > volatile-qualified type, the behavior is undefined.113)
|
| OK. Then the volatile-stripping direction can be handled arbitrarily.
I do not understand that comment.
-- Gaby
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22278