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[Bug target/19597] [4.0 Regression] avr-gcc 4.0, multiplication by constant, very long code
- From: "marekm at amelek dot gda dot pl" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 24 Jan 2005 09:24:19 -0000
- Subject: [Bug target/19597] [4.0 Regression] avr-gcc 4.0, multiplication by constant, very long code
- References: <20050123225538.19597.dmixm@marine.febras.ru>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From marekm at amelek dot gda dot pl 2005-01-24 09:24 -------
Subject: Re: [4.0 Regression] avr-gcc 4.0, multiplication by constant, very long code
On Mon, Jan 24, 2005 at 08:56:46AM -0000, giovannibajo at libero dot it wrote:
> Marek, can you review this patch please?
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19597
Thanks. Reviewing this will take some time - I agree the current rtx
costs are not perfect, but changing them can affect generated code in
unexpected ways. It would be good to test it a lot on various test
cases, to make sure it doesn't introduce new code size regressions...
Marek
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19597