> Do you have any progress with this?
Once I'm done with the recent regressions, I'll get back to this older one.
--
Eric Botcazou
On Mon, Jun 04, 2018 at 10:57:05PM +0200, Eric Botcazou wrote:
> > In the PR we have insns:
> >
> > Trying 23 -> 24:
> >23: r123:SI=zero_extend(r122:HI)
> > REG_DEAD r122:HI
> >24: [r115:SI]=r123:SI
> > REG_DEAD r123:SI
> >
> > which should be combined to
> >
> > (set (mem:SI
> I can see why WORD_REGISTER_OPERATIONS allows some REG cases,
> but why does LOAD_EXTEND_OP have an effect on them?
LOAD_EXTEND_OP has an effect on all paradoxical SUBREGs because of spilling.
This was even originally decoupled from WORD_REGISTER_OPERATIONS in reload,
see this comment from fi
Eric Botcazou writes:
>> In the PR we have insns:
>>
>> Trying 23 -> 24:
>>23: r123:SI=zero_extend(r122:HI)
>> REG_DEAD r122:HI
>>24: [r115:SI]=r123:SI
>> REG_DEAD r123:SI
>>
>> which should be combined to
>>
>> (set (mem:SI (reg/f:SI 115 [ pretmp_19 ]) [1 *pretmp_19+0 S4 A3
> In the PR we have insns:
>
> Trying 23 -> 24:
>23: r123:SI=zero_extend(r122:HI)
> REG_DEAD r122:HI
>24: [r115:SI]=r123:SI
> REG_DEAD r123:SI
>
> which should be combined to
>
> (set (mem:SI (reg/f:SI 115 [ pretmp_19 ]) [1 *pretmp_19+0 S4 A32])
> (and:SI (subreg:SI (reg:
Hi!
In the PR we have insns:
Trying 23 -> 24:
23: r123:SI=zero_extend(r122:HI)
REG_DEAD r122:HI
24: [r115:SI]=r123:SI
REG_DEAD r123:SI
which should be combined to
(set (mem:SI (reg/f:SI 115 [ pretmp_19 ]) [1 *pretmp_19+0 S4 A32])
(and:SI (subreg:SI (reg:HI 122) 0)
