gcc-4.5/4.4: Bug in .subreg1 pass?

[Georg-Johann Lay]

Denis Chertykov schrieb:
> 2011/2/26 Georg Johann Lay <avr@gjlay.de>
> 
>>Eric Botcazou schrieb:
>>
>>>>What does "word" mean here? Is it a 32-bit entity or is it according to
>>>>word_mode which is QImode for avr?
>>>
>>>The latter, it is machine-dependent.
>>>
>>>
>>>
>>>>So the same should be true for QI-subregs of scalar modes if
>>>>UNITS_PER_WORT = 1. Right?
>>>
>>>Right.
>>
>>Thanks for that definite clarification.
> 
> 
> As I understand PR46779 and PR45291 no longer an AVR port bugs.
> And the following comment is not a true anymore:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45291#c2
> Am I right ?

At least the analysis I gave there is incorrect.

I remember a problem in avr backend concerning the frame pointer because 
QImode was allowed in FP's hard regs... that sort of problem. Was that 
fixed here or just in some distribution like WinAVR? So perhaps it's 
still this FP problem?

Johann