Re: [Patch,AVR] PR54222: Add fixed point support

[Georg-Johann Lay <avr@gjlay.de>]

Denis Chertykov wrote:
> 2012/8/11 Georg-Johann Lay <avr@gjlay.de>:
>> Weddington, Eric schrieb:
>>>> From: Georg-Johann Lay
>>>>
>>>>
>>>> The first step would be to bisect and find the patch that lead to
>>>> PR53923.  It was not a change in the avr BE, so the question goes
>>>> to the authors of the respective patch.
>>>>
>>>> Up to now I didn't even try to bisect; that would take years on the
>>>> host that I have available...
>>>>
>>>>> My only real concern is that this is a major feature addition and
>>>>> the AVR port is currently broken.
>>>>
>>>> I don't know if it's the avr port or some parts of the middle end that
>>>> don't cooperate with avr.
>>>
>>> I would really, really love to see fixed point support added in,
>>> especially since I know that Sean has worked on it for quite a while,
>>> and you've also done a lot of work in getting the patches in shape to
>>> get them committed.
>>>
>>> But, if the AVR port is currently broken (by whomever, and whatever
>>> patch) and a major feature like this can't be tested to make sure it
>>> doesn't break anything else in the AVR backend, then I'm hesitant to
>>> approve (even though I really want to approve).
>>
>> I don't understand enough of DF to fix PR53923.  The insn that leads
>> to the ICE is (in df-problems.c:dead_debug_insert_temp):
>>
> 
> Today I have updated GCC svn tree and successfully compiled avr-gcc.
> The libgcc2-mulsc3.c from PR53923 also compiled without bugs.
> 
> Denis.
> 
> PS: May be I'm doing something wrong ? (I had too long vacations)

I am configuring with --target=avr --disable-nls --with-dwarf2
--enable-languages=c,c++ --enable-target-optspace=yes --enable-checking=yes,rtl

Build GCC is "gcc version 4.3.2".
Build and host are i686-pc-linux-gnu.

Maybe it's different on a 64-bit computer, but I only have 32-bit host.

Johann