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[Bug rtl-optimization/20969] unrolling does not take target register pressure into account.
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 12 Apr 2005 16:26:02 -0000
- Subject: [Bug rtl-optimization/20969] unrolling does not take target register pressure into account.
- References: <20050412154215.20969.amylaar@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-04-12 16:26 -------
(In reply to comment #6)
> No but if we go your route, then every place where we do an
> optimization, we
> will then need to teach it about register pressure which is wrong. Only
> the register allocator should know.
Also note you are just working around the issue is that we don't have a good register allocator, fixing
that will fix this correct. Yes you have patches for the work around but that is not good enough any
more.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20969