This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/31169] Bootstrap comparison error at revision 122821
- From: "dave at hiauly1 dot hia dot nrc dot ca" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Mar 2007 14:43:59 -0000
- Subject: [Bug tree-optimization/31169] Bootstrap comparison error at revision 122821
- References: <bug-31169-276@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #19 from dave at hiauly1 dot hia dot nrc dot ca 2007-03-16 14:43 -------
Subject: Re: Bootstrap comparison error at revision 122821
> If the count is actually zero, we can end up doing x << 0 (a left shift of
> zero). Does hppa handle this correctly? Does it, for
The hardware doesn't support a left shift of zero, so at the moment
the expanders and patterns require that the shift length be greater
than zero. I recently fixed a bug in this area. Should copies be
generated for this case?
Dave
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31169