On 10/13/14 18:16, Joern Rennecke wrote:
On 13 October 2014 20:43, Jeff Law wrote: ...
I think you want "smode" in the mode_for_size call rather than
"mode", right (both instances)?
No, nregs is the number of hard registers of regno in "mode". Hence
we must use the size of "mode".
OK. My b
On 13 October 2014 20:43, Jeff Law wrote:
...
> I think you want "smode" in the mode_for_size call rather than "mode", right
> (both instances)?
No, nregs is the number of hard registers of regno in "mode". Hence
we must use the
size of "mode".
How to choose the mode class is not so clear-cut.
On 10/11/14 03:32, Joern Rennecke wrote:
On 10 October 2014 21:13, Jeff Law wrote:
...
ISTM it would be better to find the mode of the same class that corresponds
to GET_MODE_SIZE (mode) / nregs. In your case that's obviously QImode :-)
Like this?
Or did you mean to remove the save_mode[regn
On 10 October 2014 21:13, Jeff Law wrote:
...
> ISTM it would be better to find the mode of the same class that corresponds
> to GET_MODE_SIZE (mode) / nregs. In your case that's obviously QImode :-)
Like this?
Or did you mean to remove the save_mode[regno] use altogether? I can
think of argume
On 10/07/14 15:56, Joern Rennecke wrote:
On 7 October 2014 18:38, Jeff Law wrote:
On 10/06/14 20:57, Joern Rennecke wrote:
On 6 October 2014 19:58, Jeff Law wrote:
What makes word_mode special here? ie, why is special casing for
word_mode
the right thing to do?
The patch does not speci
On 7 October 2014 18:38, Jeff Law wrote:
> On 10/06/14 20:57, Joern Rennecke wrote:
>>
>> On 6 October 2014 19:58, Jeff Law wrote:
>>>
>>> What makes word_mode special here? ie, why is special casing for
>>> word_mode
>>> the right thing to do?
>>
>>
>> The patch does not special-case word mode.
On 10/06/14 20:57, Joern Rennecke wrote:
On 6 October 2014 19:58, Jeff Law wrote:
What makes word_mode special here? ie, why is special casing for word_mode
the right thing to do?
The patch does not special-case word mode. The if condition tests if
smode would
cover multiple hard registers.
On 6 October 2014 19:58, Jeff Law wrote:
> What makes word_mode special here? ie, why is special casing for word_mode
> the right thing to do?
The patch does not special-case word mode. The if condition tests if
smode would
cover multiple hard registers.
If that would be the case, smode is repl
On 10/06/14 02:51, Joern Rennecke wrote:
Investigating an ICE while trying to compile libgcc2.c:__udivmoddi4 for
a new avr variant with different register set/allocation order, I found
replace_reg_with_saved_mem falling over its own nonsense. The instruction:
(debug_insn 97 96 98 2 (var_locatio
Investigating an ICE while trying to compile libgcc2.c:__udivmoddi4 for
a new avr variant with different register set/allocation order, I found
replace_reg_with_saved_mem falling over its own nonsense. The instruction:
(debug_insn 97 96 98 2 (var_location:SI __x2 (mult:SI (lshiftrt:SI
(reg/v:SI 1
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