r217994 - [X86, inline-asm] Check that the input size is correct for constraints R, q, Q,

[Eric Christopher]

Which means the check should probably be either a) more complicated to
be tight, or b) loosened to where Hans's patch is going.

-eric

On Thu, Sep 18, 2014 at 1:27 PM, Eric Christopher <echristo at gmail.com> wrote:
> Yarr.
>
> -eric
>
> On Thu, Sep 18, 2014 at 1:27 PM, Akira Hatanaka <ahatanaka at apple.com> wrote:
>> I didn’t know ‘x’ can also mean 256-bit ‘ymm’ registers. Is this legal only if the target supports avx?
>>
>> Thanks.
>>
>> On Sep 18, 2014, at 1:20 PM, Eric Christopher <echristo at gmail.com> wrote:
>>
>>> You could probably create a 512-byte data structure to get it to fail
>>> as well. (Though the explicit no-error is nice too, thanks)
>>>
>>> -eric
>>>
>>> On Thu, Sep 18, 2014 at 1:04 PM, Hans Wennborg <hans at chromium.org> wrote:
>>>> On Thu, Sep 18, 2014 at 11:34 AM, Eric Christopher <echristo at gmail.com> wrote:
>>>>>>
>>>>>
>>>>>
>>>>>> +  case 'x':
>>>>>> +  case 'f':
>>>>>> +  case 't':
>>>>>> +  case 'u':
>>>>>> +    return Size <= 128;
>>>>>
>>>>>
>>>>> Hans pointed out that you'll have problems here with _m256 and wanting an
>>>>> avx register. There is, afaict, no separate constraint for "gimme an avx
>>>>> register" that's different from SSE registers. There is the 'v' constraint
>>>>> which works for avx 512 (evex encoded) registers.
>>>>
>>>> How about the attached patch?
>>>>
>>>> - Hans
>>