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[Bug libstdc++/5625] [mips] exception unwinding creates invalid pointer on mips
- From: "rsandifo at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 5 Feb 2004 20:51:17 -0000
- Subject: [Bug libstdc++/5625] [mips] exception unwinding creates invalid pointer on mips
- References: <20020207120601.5625.emaste@sandvine.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rsandifo at redhat dot com 2004-02-05 20:51 -------
Subject: Re: [mips] exception unwinding creates invalid
pointer on mips
Richard Sandiford <rsandifo@redhat.com> writes:
> Right. The Pmode == ptr_mode thing is deliberate: if you change Pmode
> to DImode for 32-bit ptr_mode, then the loop optimisers are no longer
> able to recognise ivs properly. Any pointer + integer will involve
> a sign-extension.
Sorry, this was poorly phrased. I wasn't trying to suggest there was
anything special about 32-bit ptr_mode here: the same problem applies
for 64-bit ptr_mode too. It's just not a problem we want to spread.
Richard
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=5625