[Patch,AVR] PR54222: Add fixed point support

[Denis Chertykov]

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)