subreg:HI of PSI HW register issue

[Aurelien Buhrig]

> On 03/09/2012 11:20 AM, Aurelien Buhrig wrote:
>> Hi,
>>
>> It seems there is an issue around subreg:HI of PSI hardware register,
>> which occurs either during expand or reload (GCC 4.6.1).
>>
>> For my big endian target,
>> (subreg:HI (reg:PSI A0_REGNO) 0) is not representable but
>> (subreg:HI (reg:PSI A0_REGNO) 2) is (reg:HI A0_REGNO).
> 
>> - Is it correct that gcc emits such a subreg pattern in Pmode=PSI during
>> expand ? Or should it be in ptr_mode=SImode (in this case, both
>> (subreg:HI (reg:SI) 0/2) are representable)?
> 
> This, I think. I have a port with a rather similar situation, and I'm
> betting you also have a failure in gcc.c-torture/execute/20040625-1.c. I
> don't want to promise anything but I may have something for you next
> week-ish.
> 
> 
> Bernd

Hi Bernd,

Any update on this?

Thanks,
Aurélien