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[Bug tree-optimization/34099] [4.3 Regression] optimizer problem
- 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: 15 Nov 2007 16:06:30 -0000
- Subject: [Bug tree-optimization/34099] [4.3 Regression] optimizer problem
- References: <bug-34099-3137@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #9 from rguenth at gcc dot gnu dot org 2007-11-15 16:06 -------
Created an attachment (id=14557)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14557&action=view)
broken patch
It miscompiles gengtype. I remember problems with changing likely_value in
similar ways back in time. The other option is to not ignore UNDEFINED lattice
values in ccp_lattice_meet but do
any M UNDEFINED = VARYING
instead of
any M UNDEFINED = any
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34099