This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug middle-end/31029] Fold does not fold C - a == a
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 2 Nov 2008 18:23:53 -0000
- Subject: [Bug middle-end/31029] Fold does not fold C - a == a
- References: <bug-31029-6642@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from rguenth at gcc dot gnu dot org 2008-11-02 18:23 -------
Actually we can fold C - a == a only for odd C.
But more generally a +- b == a to b == 0.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31029