[Bug target/19597] [4.0 Regression] avr-gcc 4.0, multiplication by constant, very long code

[bernie at develer dot com]

------- Additional Comments From bernie at develer dot com  2005-01-24 10:28 -------
Subject: Re:  [4.0 Regression] avr-gcc 4.0, multiplication
 by constant, very long code

marekm at amelek dot gda dot pl wrote:
> ------- 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...

I'm building avr-gcc right now with your two patches and
this one applied.  I'll let you know shortly.

btw, how do you test the AVR backend?  Can you execute
the dejagnu testsuite on simulavr or something similar?



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19597